Benchmarking Report Cement Sector PDF
Benchmarking Report Cement Sector PDF
Benchmarking Report Cement Sector PDF
2014
Industrial Energy Efficiency
Benchmarking Report for Cement Sector
Prepared by
Chapter 2 explains the methodology applied for establishing the benchmarking studies. It relates, for the most
part, to the UNIDO methodology described in the UNIDO Working Paper “Global Industrial Energy Efficiency
Benchmarking – An Energy Policy Tool, Working Paper, 2010”. Furthermore, Chapter 2 describes the approach
for estimating energy saving potentials, for collecting data, for defining system boundaries and for checking the
reliability of data.
For the Egyptian benchmarking curves, comprehensive data single-handed collected by national experts in
selected companies of the three sectors were applied. This approach gives much more precise results than
simply applying statistical data. The data was checked by the national and international experts, system
boundaries were kept and outliers were deleted.
Chapter 3 contains the basic sector information, including the economic and legislative framework, the number
of companies and ownership, production capacities, main products and markets. Furthermore, Chapter 3
shows the main drivers for energy consumption in the cement industry and the energy consumption of the
whole sector according to national statistical information. These energy consumption values are not very
reliable and were not taken for drawing the energy consumption and saving scenarios in Chapter 4.
Chapter 3.3.4 describes the main drivers for energy consumption in the cement industry. The main driver is the
production process of clinker. About 96% of the total energy consumption is used for producing clinker in the
kilns. The main fuels used for clinker production are Mazout and natural gas. A much smaller part of the total
energy consumption is used for the preparation of raw materials and grinding the clinker to cement.
The following table from the Berkeley National Laboratory Study “World Best Practice Final Energy Intensity
Values for Selected Industrial Sectors” (Ernst Worrell, 2008) shows the different production processes of the
cement industry for the main cement types.
III
Production Process Portland Cement (GJ/t)
Electricity 0.08
From this study, the world Best Available Technology (BAT) value with of total specific energy consumption
2.92 GJ/t cement was taken. This value was used for calculating the saving potentials of the whole cement
sector in Egypt.
In the beginning of the project, it was planned to establish, in addition to the benchmark curves of individual
companies, similar benchmark curves as in the UNIDO working paper by using national statistical data from the
Industrial Development Authority (IDA) and the Central Agency for Public Mobilization and Statistics (CAPMAS).
However, during the project activities, the Egyptian experts evaluated the data of IDA and CAPMAS and came
to the conclusion that the data is incomplete for benchmarking purposes. Therefore, the project team decided
not to establish benchmark curves with the statistical data, but to use the outcome of this project to support
IDA and CAPMAS in refining their data collection processes.
Chapter 4 shows the results of the analysis of the data collected in Egyptian cement plants. From the 22
cement plants operating in Egypt, 11 plants were analyzed. These 11 plants have a share of 25% of the total
energy consumption of the cement sector in Egypt, which is quite a representative sample. During the data
quality control one of the 11 plants was identified as an outlier. The plant was contacted to verify the data but
did not reply. So this data set was dropped from further analysis.
One important result of the study is the construction of energy efficiency benchmark curves. The following
graph shows the benchmark curve for the cement industry of 8 analyzed plants for the total energy
consumption. The data correspond to the average specific energy consumption of the years 2010 – 2014.
These types of benchmark curves show the specific energy consumption of the analyzed companies per ton of
cement produced (GJ/t) as a function of the production volume share. The most efficient plants are
represented to the left and lower part of the curve, and the least efficient plants to the right and upper part of
the curve.
IV
The most efficient plant of the analyzed companies in Egypt has a specific total energy consumption of
3.53 GJ/t cement and a production volume share of 27%. This value defines the national BAT value. The red line
indicates the international BAT value which corresponds to a specific total energy consumption of 2.92 GJ/t
cement. The second lowest specific energy consumption in this curve is defined as the national best practice
technology (BPT) value. The national BPT value is 3.62 GJ/t.
For this study, the BPT value was only applied for the saving scenarios in Chapter 4.7 in order to draw up the
BPT scenario. It was defined that the lowest known BPT value, either on national or international level, would
be applied for the scenario. For the cement industry, the international BPT for total energy consumption is
3.02 GJ/t cement, which is lower than the national BPT value of 3.61 GJ/t cement.
In Chapter 4.6, energy saving potentials were calculated, on the one hand, for the 10 companies that
participated on the benchmarking study and on the other hand, for the whole Egyptian cement sector. The 10
companies have an energy saving potential for thermal energy of about 8.7 PJ/a. The saving potential for
electrical energy of the 10 plants is about 177 GWh/a.
The total energy saving potential of the whole cement industry sector in Egypt is about 52 PJ/a.
V
Furthermore, in Chapter 4.7 different energy saving scenarios until 2030 and 2050 were drawn. The scenarios
correspond to the scenarios in the UNIDO Working Paper. The four scenarios are:
Frozen efficiency: No additional energy efficiency savings are made. The current levels of energy
efficiency are not improved upon.
Baseline efficiency: Energy efficiency improves at a rate of 0.3% a year.
BPT scenario: All plants are operating at the current levels of BPT by 2030. This is equivalent to an
energy efficiency improvement of 1.65% a year in the period 2012 to 2030. The BPT is the lowest
known BPT, either on international or on national level. For the cement sector the international BPT
value was chosen (3.02 GJ/t cement).
All plants are operating at the current levels of BPT by 2050. This is equivalent to an energy efficiency
improvement of 0.78% a year in the period 2012 to 2050.
BAT scenario: All plants are operating at the current levels of BAT by 2030. This is equivalent to an
energy efficiency improvement of 1.84% a year in the period 2012 to 2030. The BAT is the lowest
known BAT, either on international or on national level. For the cement sector the international BAT
value was chosen (2.92 GJ/t cement).
All plants are operating at current levels of BAT by 2050. This is equivalent to an energy efficiency
improvement of 0.87% a year in the period 2012 to 2050.
An important factor for drawing the scenarios is the rate of production growth. The production of the cement
sector in 2050 will be 2.8 times higher than today and in 2030 it will be 1.7 higher. The different scenarios were
calculated by taking the growing production until 2030 and 2050 into account.
The following graph shows the four scenarios until 2050 for the growth of total energy consumption in the
cement industry. The basis for calculating these scenarios was the annual production volume of the whole
sector according to the IDA which was 46.5 Mt of cement for the year 2012. Multiplied with the weighted
average total energy consumption of the analyzed companies which is 4.04 GJ/t cement these to figures led to
the total annual energy consumption of the cement sector in Egypt in the year 2012. This total energy
consumption of 187.9 PJ in the year 2012 was the basis for all 4 scenarios.
According to the frozen efficiency scenario, the annual total energy consumption in 2050 is about 526 PJ for the
whole sector. The annual energy consumption in 2050 according to the BAT scenario is about 380 PJ.
Comparing the frozen efficiency scenario and the BAT scenario, the annual saving potential would be about
145.8 PJ, which is 28%.
VI
The following table below shows the total annual energy consumption of the whole sector in 2012, 2030 and
2050 according to the four scenarios. Furthermore, the table shows the annual and cumulative energy saving
potentials if all companies of the sector reach the BAT specific energy consumption in 2030 or 2050.
Year Frozen Scenario Baseline BPT Scenario BAT Scenario Savings Frozen - Cumulative
(PJ) Scenario (PJ) (PJ) (PJ) BAT Scenario Savings BAT
(PJ) Scenario (PJ)
2012 187.9 187.9 187.9 187.9
2030 319.3 302.5 238.7 230.8 88.5 750.5
2050 526.0 469.3 393.2 380.2 145.9 10,651.3
In order to reach the savings of 88.5 PJ in 2030 the sector would need to implement energy saving measures of
about 4.9 PJ per year. Per company this means annual savings of about 224 TJ.
In order to reach the saving of 145.9 GJ in 2050 the sector would need to implement energy saving measures of
about 3.8 PJ per year. Per company this means annual savings of about 174 TJ.
In Chapter 4.8, the sector-specific energy saving opportunities and measures are described. This study offers a
solid basis for further energy efficiency projects for the Egyptian cement sector. These projects should focus on
supporting the companies in implementing energy efficiency measures and energy management systems in
order to continually improve their energy efficiency.
VII
Abstract
The report contains the main results for the Egyptian cement sector of the project “Industrial Energy Efficiency
in Egypt – Development of Benchmarking Reports for Three Sectors Iron and Steel, Fertilizers and Cement“,
financed by the United Nations Industrial Development Organization (UNIDO) and the Global Environmental
Facility (GEF).
Within this project, energy efficiency benchmark curves were established. The methodology relates, for the
most part, to the UNIDO methodology described in the UNIDO Working Paper “Global Industrial Energy
Efficiency Benchmarking – An Energy Policy Tool, Working Paper, 2010”. Furthermore, specific approaches for
estimating energy saving potentials, for collecting data, for defining system boundaries and for checking the
reliability of data were developed.
The main results of the study are the benchmark curves, the energy saving potentials and the energy saving
scenarios. The following saving potentials were calculated:
The following table shows the annual energy consumption of the whole sector in 2012, 2030 and 2050
according to the four scenarios. Furthermore, the table shows the annual and cumulative energy saving
potentials if all companies of the sector reach the BAT specific energy consumption in 2030 or 2050.
Year Frozen Scenario Baseline BPT Scenario BAT Scenario Savings Frozen - Cumulative
(PJ) Scenario (PJ) (PJ) (PJ) BAT Scenario Savings BAT
(PJ) Scenario (PJ)
2012 187.9 187.9 187.9 187.9
2030 319.3 302.5 238.7 230.8 88.5 750.5
2050 526.0 469.3 393.2 380.2 145.9 10,651.3
VIII
Acknowledgement
This report is one of a series of three benchmarking reports of energy intensive sectors in Egypt, namely;
Cement, Iron & Steel and Fertilizers. The reports were developed by the United Nations Industrial Development
Organization within the scope of the Industrial Energy Efficiency Project in Egypt (IEE). The project is funded by
the Global Environmental Facility (GEF) and implemented by UNIDO in cooperation with the Egyptian
Environmental Affairs Agency (EEAA), the Ministry of Industry and Foreign Trade of Egypt (MoIFT) and the
Federation of Egyptian Industries (FEI).
The reports were developed under the overall responsibility and guidance of Rana Ghoneim and the
coordination of Gihan Bayoumi. The Cement Sector Benchmarking Report was authored by Petra Lackner and
Amr Osama with inputs from Ashraf Zeitoun, Fatheya Soliman and Ayman El Zahaby.
A special thanks to the staff and management of the Industrial Development Authority especially El Saaed
Ibrahim for their valuable support in facilitating the data collection, without which the development of these
reports would not have been possible.
IX
Contents
1 INTRODUCTION 1
1.1 UNIDO Industrial Energy Efficiency Program 1
1.2 Aim of the Project 1
2 METHODOLOGY TO ESTABLISH BENCHMARKING STUDIES 3
2.1 UNIDO Benchmarking Methodology 3
2.2 Drawing the Benchmarking Curves for Egyptian Industry 4
2.2.1 System Boundaries for Benchmarking 4
2.2.2 Approach for Data Collection in Companies 6
2.2.3 Selection of the Companies for Data Collection 8
2.2.4 Schedule for Data Collection 9
2.2.5 Limitations of Data Collection and Barriers Encountered 10
2.3 International Benchmarks for Comparison 10
2.3.1 International Best Practice and Best Available Technology 11
2.3.2 Best Available Techniques (BAT) Reference Document 12
2.4 Approach for Estimating Energy Saving Potentials 13
2.4.1 Saving Potential of Participating Companies 13
2.4.2 Saving Potential of the Whole Sector in Egypt 13
2.4.3 Saving Potentials for the BPT Scenario 14
2.5 Possible Sources on National Level 14
2.5.1 Energy Consumption Data on National Level (Top-Down) 14
2.5.2 Production Data on National Level (Top-Down) 15
2.6 Process to Check Reliability of Data 15
3 BASIC SECTOR INFORMATION 17
3.1 Economic and Legislative Framework 17
3.2 Number of Companies and Ownership 18
3.3 Production Capacities 19
3.3.1 Main Products 19
3.3.2 Annual Turnover 22
3.3.3 Main Markets 22
3.3.4 Main Drivers for Energy Consumption 23
3.4 Energy Data of the Whole Sector 24
3.4.1 Thermal Energy Consumption of the Whole Sector 24
3.4.2 Electricity Consumption of the Whole Sector 25
3.4.3 Energy Costs 25
3.5 Energy Efficiency Measures Implemented and/or Planned 25
4 ANALYSIS OF RESULTS 27
4.1 Achieved Data Sets for Analysis 27
4.1.1 Production Volume of Analyzed Companies 27
4.1.2 Energy Consumption of Analyzed Companies 29
XI
4.1.3 Status of Energy Management System in Analyzed Companies 37
4.2 Benchmark Clusters and/ or Adjustment Factors 37
4.3 Energy Performance Indicators of Analyzed Companies 38
4.3.1 Benchmark Curve on National Level 38
4.4 Share of Energy Costs of Turnover 43
4.5 Energy Cost Benchmark Curve for Egyptian Companies 43
4.6 Annual Saving Potential 44
4.6.1 Annual Saving Potential for Each Plant 44
4.6.2 Annual Saving Potential for the Whole Sector 46
4.7 Saving Scenarios until 2030 and 2050 47
4.7.1 Energy Savings in 2030 and 2050 49
4.8 Saving Opportunities 50
5 RECOMMENDATIONS 55
5.1 Strengthening the Statistical Data Collection Process in Egypt 55
5.2 Implementing Support Programmes for Industry 55
5.2.1 Energy Management Programmes 55
5.2.2 Energy Audit Programmes 56
6 LITERATURE 57
7 ABBREVIATIONS 59
8 LIST OF FIGURES 61
9 LIST OF TABLES 63
XII
INTRODUCTION
1 Introduction
The Egyptian industrial sector is responsible for approximately 43% of national final energy consumption, and
33% of national electricity consumption (IEA, 2013). Overall industry-related emissions accounted for 29% of
the total emissions in 2005 and are expected to increase their relative share to 36% by 2030 (McKinsey 2010).
The final energy consumption per unit of output in the most important industries in Egypt is typically 10 to 50%
higher than the international average. Therefore, increased energy efficiency (EE) in the Egyptian industry has
the potential to make a significant contribution to meeting the growing energy supply challenges facing the
country.
Still, worldwide, the energy efficiency in the industry is well below the technically feasible and economic
optimum. It has been estimated that the industry has the technical potential to decrease its energy intensity by
up to 26% and emissions by up to 32% providing a striking 8% and 12.4% reduction in total global energy use
and CO2 emissions (IEA).
Improving energy efficiency in industry is one of the most cost-effective measures to help supply-constrained
developing and emerging countries meet their increasing energy demand and loosen the link between
economic growth and environmental degradation.
The UNIDO approach in energy efficiency is a holistic approach. It not only focuses on technical improvement,
but also on improvement in policy, management, operations and financing. It introduces optimization of an
entire energy system rather than optimization of individual equipment components. To ensure sustainability, it
focuses on creating a well-functioning local market for IEE services.
Primary target groups of the project are industrial decision-makers (managers), engineers, vendors and other
professionals and IEE policy-making and/or implementing institutions. The project will provide technical
assistance to develop and help establish market-oriented policy instruments needed to support sustainable
1
BENCHMARKING REPORT OF THE SECTOR CEMENT
progression of Egyptian industries toward international best energy performance and to stimulate the creation
of a market for IEE products and services.
The project will broaden knowledge and in-depth technical capacity for IEE, with an emphasis on system
organization and ISO energy management in industry, energy professionals and relevant institutions, such as
the Egyptian Environmental Affairs Agency and other concerned institutions. The project will provide technical
assistance, including energy audits, and support a limited number of pilot IEE projects with high replication
and/or energy saving potential in the key industrial sectors to reach implementation.
The preparation of IEE benchmarking reports for the Cement, Iron and Steel and Fertilizers sectors is part of
Component 1 of the IEE project.
2
METHODOLOGY TO ESTABLISH BENCHMARKING STUDIES
2 Methodology to Establish
Benchmarking Studies
The methodology applied for establishing the benchmarking studies relates for the most part to the UNIDO
methodology described in the UNIDO Working Paper “Global Industrial Energy Efficiency Benchmarking – An
Energy Policy Tool, Working Paper, 2010”. Furthermore, the approach for estimating energy saving potentials,
the data collection process, the definition of system boundaries and the process to check the reliability of data
are part of the methodology and are explained in this chapter.
Figure 1: Illustrative Energy Benchmark Curve for the Manufacturing Industry (UNIDO, 2010)
3
BENCHMARKING REPORT OF THE SECTOR CEMENT
SEC in figure 1 is “Specific Energy Consumption”, BAT means “Best Available Technology” and BPT means “Best
Practice Technology”. The benchmark curve is described as follows: “The most efficient plants are represented
to the left and lower part of the curve, and the least efficient plants to the right and upper part of the curve.
The shape of benchmark curves would vary for different sectors and regions. However, typically a few plants
are very efficient and a few plants are very inefficient. This is generally represented by the steep slopes of the
benchmark curve before the first decile and after the last decile respectively.”
This relationship can be used to support a rough assessment of the energy efficiency potential for an industrial
process, which is defined as 50% of the difference between the efficiencies observed at the first and last
deciles.
The most efficient plants in the benchmark curve are used to define the Best Practice Technology (BPT). In the
UNIDO Working Paper the first decile is defined as the BPT and as the international benchmark. And the most
efficient plant is defined as Best Available Technology (BAT).
Where possible, the analysis uses physical production levels to define the deciles. Where the lack of data
makes such an approach inappropriate or unreliable, deciles are based on the number of plants.
The benchmark curves in the UNIDO Working Paper show energy efficiency benchmarks on a global level. And
the data for country- or region-specific benchmarks came from statistics and further sources.
Therefore, the results of the benchmarking studies can be applied to support improving the national data
collection on energy consumption and production volumes.
In order to make the energy efficiency benchmarks of the different companies comparable, the data used for
calculating the EPI or EEI have to be defined very clearly. Following questions have to be considered:
Where is the boundary around the company? Is the quarry included? Is the truck fleet included? Is the
storage of final products included? Is the transport and shipment of final products included, etc.?
How to deal with the input of energy consumption? How to deal with data about on-site energy
production in combined heat and power plants (CHP), or in photovoltaic (PV) plants etc.?
What about energy services not produced on-site but purchased? Like purchased compressed air or
purchased steam?
4
METHODOLOGY TO ESTABLISH BENCHMARKING STUDIES
How to deal with raw material input and semi-finished products input? Some plants produce the semi-
finished products on-site, other purchase them etc.
What about final products that were not produced on-site, but are packed on-site, etc.?
The better the system boundaries are defined, the more the benchmarking will be a comparison of “apples to
apples”.
In the US Energy Star EPI program for cement industry, the following definitions for energy data are given:
Energy Input: All energy inputs must be metered or otherwise verifiable (e.g. utility bills, delivery receipts).
Energy values are entered as net values (i.e. purchases and transfers in minus sales and transfers out), subject
to the descriptions below.
Electricity: Data for electricity includes only total electricity purchased or transferred into the plant
from another facility, net of sales or transfers. Purchased or transferred electricity is entered into the
“electricity column” on the EPI worksheet.
Compressed Air: Account for the energy used to produce compressed air if compressed air is
transferred in from an external or third-party site whose energy does not appear in your plant's
energy total. The kWh for producing compressed air is calculated using actual conversion efficiencies
of the external or third-party producer, and added to the plant's energy total.
Electricity from On-site Renewables: Include the electricity consumed from on-site renewable
generation (e.g. solar PV, wind, small hydro) in your total energy consumption. Excess electricity from
on-site renewable generation that is sold or transferred off-site is not accounted for in the EPI.
Electricity from All Other On-site Generation: Do not include the electricity consumed from all other
on-site generation (e.g. CHP, diesel generators) in your total energy consumption. When electricity is
generated on-site from these other sources, include the fuel that is purchased or transferred into the
plant to operate other on-site generation, but do not include the electricity generated by those
systems.
Electricity from on-site generation that is sold or transferred off-site must be subtracted from the total
purchased electricity to represent "net of sales or transfer".
Non-Electric Energy Use: Include all other forms of energy purchased or transferred (natural gas, oil,
coal, etc.), net of sales or transfers. This EPI includes a field for waste-derived fuels (e.g. tires). For
fuels not defined in the EPI, use the “other” column.
Steam: Account for the energy used to produce steam if steam is transferred in from an external or
third-party site whose energy does not appear in your plant's energy total.
Recovered Energy: Do not include energy recovered from the production process (e.g. waste heat,
process byproducts) in the energy accounting of the EPI. The EPI’s underlying statistical model
recognizes that plants have an opportunity to recover or self-produce a portion of the energy they
require, and is adjusted based on plant characteristics and purchased energy inputs to the EPI.
For collecting the energy consumption data in the Egyptian cement companies, the above-described process
was taken into account.
5
BENCHMARKING REPORT OF THE SECTOR CEMENT
The production process in the cement industry is shown in the following figure:
The defined system boundary for the cement industry within this benchmarking study is “the process from the
limestone quarry to the cement storage and packaging”. The transportation of the final product (shipping,
trucks) is not part of the benchmarks.
Thermal energy consumption: clinker that is produced in the facility is the value to be used for calculating the
specific energy consumption (SEC), excluding the purchased clinker
Electricity consumption: the electricity should be adjusted as follows:
Adjusted electricity = total electricity consumed in the plant * percent clinker purchased * percent of
electricity for grinding
Adjusted cement = total cement grinded – purchased clinker (clinker : cement ratio)
Data from individual companies from the last available three years was collected. These data show the trend in
the development of energy consumption and production and allows defining the most representative EPI of
the plant to be used for the benchmark curve.
6
METHODOLOGY TO ESTABLISH BENCHMARKING STUDIES
For the data collection, two different kinds of data collection sheets were developed:
detailed data collection sheet to be used for companies that were visited by the national expert
simplified data collection sheet to be used for companies contacted by phone and email
General information
Detailed information about end products, semi-finished products and energy demanding
production facilities
Collected data: type and amount of end products, type and amount of semi-finished products,
boilers, compressors, etc.
Resulting information: type and amount of end products, type and amount of semi-finished
products, energy consumption of most energy demanding production facilities
Energy management
Input data
Output data
Process information
7
BENCHMARKING REPORT OF THE SECTOR CEMENT
Only companies that were selected to be part of the benchmarking activities were invited to the workshop. The
number of companies that were invited is 22 for cement industry, 21 for iron & steel industry and 9 for the
fertilizer sector. In addition, several representatives from project partners, especially from IDA have attended.
All 22 Egyptian cement plants were invited to participate on the project and data collection:
8
METHODOLOGY TO ESTABLISH BENCHMARKING STUDIES
For the purpose of data collection, cement plants were contacted and site visits were arranged. However,
several plants showed reluctance to cooperate
9
BENCHMARKING REPORT OF THE SECTOR CEMENT
Due to the current energy crisis in Egypt, some of the cement companies; specifically the large cement players,
were not willing to participate in the project. The Egyptian Environmental Affairs Agency (EEAA) is developing
new guidelines for the use of coal in cement industry. The guidelines are expected to be released before the
end of 2014, which may help solve the energy crisis in the sector.
The “Best Available Techniques (BAT) Reference Document for the Production of Cement, Lime and Magnesium
Oxide”, published in 2013, indicates “BAT-associated energy consumption” that are higher than the world best
practice benchmarks from the Berkeley study (see Table 3).
Table 3: Energy Intensity Values for Clinker Making (Ernst Worrell, 2008)
The “UNIDO Working Paper on Global Industrial Energy - Efficiency Benchmarking” also used the benchmarks
published in the Berkeley study. The following graph shows the international benchmark curve for clinker
production according to the UNIDO Working Paper.
10
METHODOLOGY TO ESTABLISH BENCHMARKING STUDIES
Figure 3: International Benchmark Curve for Clinker Production, 2007 (UNIDO, 2010)
Table 4: Summary of World Best Practice Final Energy Intensity Values for Selected Products of the Cement Industry (Ernst
Worrell, 2008)
Production process Portland cement Cement < 25% fly ash Cement 65% blast furnace slag
A more detailed account about the final energy intensity values for selected products of cement industry is
shown in Table 10.
The UNIDO Working Paper also applies the values of the Berkeley National Laboratory study for the cement
industry.
11
BENCHMARKING REPORT OF THE SECTOR CEMENT
Table 5: Overview of Energy Performance Indicators for the Cement Industry (UNIDO, 2010)
GJ/t clinker 3.3 – 4.2 3.1 – 6.2 3.5 2.9 3.0 4.4 6.6
For calculating the energy saving scenarios in chapter 4.7 the following values, from table 5 were taken to
calculate the scenarios for Best Practice Technology (BPT) and Best Available Technology (BAT):
The range of BAT-associated energy consumption levels reaches from 2.9 GJ/t clinker to 3.3 GJ/t clinker. Those
levels do not apply to plants producing special cement or white cement clinker that require significantly higher
process temperatures due to product specifications.
12
METHODOLOGY TO ESTABLISH BENCHMARKING STUDIES
2, 3
Dry process kiln with multistage GJ/t clinker 2.9 – 3.3 ( )
preheating and precalcination
1) Levels do not apply to plants producing special cement or white cement clinker that require significantly
higher process temperatures due to product specifications.
2) Under normal (excluding, e.g. start-ups and shutdowns) and optimized operational conditions
3) The production capacity has an influence on the energy demand, with higher capacities providing energy
savings and smaller capacities requiring more energy. Energy consumption also depends on the number of
cyclone preheater stages, with more cyclone preheater stages leading to lower energy consumption of the
kiln process. The appropriate number of cyclone preheater stages is mainly determined by the moisture
content of raw materials.
The first type of saving potentials calculated was the saving potential of each company. Therefore the following
method was used:
Assumption for saving potentials of companies which participated on the benchmarking study:
All participating companies achieve the SEC of the company with the lowest SEC (BAT).
The second type of saving potentials calculated was the saving potential of all companies of the sector in Egypt.
For this calculation the following data was necessary:
The total annual production of the sector. This information was taken from the IDA data.
The SEC of the total sector: As this information is not available, the project team defined the weighted
average SEC of the analyzed companies in the current benchmarking project as SEC of the total sector.
This assumption is eligible as the companies participated in the current benchmark project gave a
good sample of the whole sector.
13
BENCHMARKING REPORT OF THE SECTOR CEMENT
With this information the saving potential of the whole sector can be calculated with the same formula:
Potential of the Whole Sector = (International BAT – weighted SEC of the Analyzed Companies) *
Total Production of the Whole Sector
The saving potential of the whole sector is calculated with the lowest known BAT. This can be either the
national BAT or the international BAT.
In chapter 4.7 different saving scenarios are shown. For the BPT scenario also the lowest known BPT value was
taken. This value can either be a national or an international one.
During the project activities the Egyptian experts evaluated the data of IDA and CAPMAS and came to the
conclusion, that the data is too outdated and in some cases not reliable. Therefore the project team decided
not to establish benchmark curves with the statistical data.
Another source for energy consumption data on national level is the IDA. IDA is responsible for granting
licenses for energy supply for industrial enterprises. If a factory starts its operation, it will get a contract and
license for five years of energy supply from IDA. Therefore, IDA data reflect “planned energy consumption
data” and not “metered energy consumption data”. Every five years the license for energy supply needs to be
renewed that brings an update of the planned data of IDA.
14
METHODOLOGY TO ESTABLISH BENCHMARKING STUDIES
The energy consumption would have been overestimated as it reflects the licensed energy supply, but knowing
this, the curve would have given a first insight in the sectors’ specific energy consumption. As already
mentioned, after a closer evaluation of the IDA and CAPMAS data it was decided not to use this data for
establishing benchmark curves.
UNIDO's main counterpart is EEAA which represented the Ministry of Environment. The other project partners
are the Industrial Development Authority (IDA), Industrial Modernization Center (IMC) and Egyptian
Organization for Standardization (EOS) from the Ministry of Industry and Foreign Trade (MoIFT) and the
Federation of Egyptian Industries (FEI).
The calculated EPI were compared with international and national benchmarks and outliers were analyzed.
Data sets with not explicable substantial deviations from the average were excluded from the benchmark
curve.
15
BASIC SECTOR INFORMATION
Currently, the Egyptian cement industry comprises 22 cement plants with a total production capacity of about
68 million tons of cement per year. Ordinary Portland Cement (OPC) is the most common type of cement
produced in Egypt.
With the construction boom on the rise over the years, high demand for cement that was met through new
cement companies in Egypt and enhancement of existing production lines to meet the increase in local
demand. However, the country is currently experiencing a fuel crisis and the cement companies are struggling
to operate at full capacity since year 2013.
Portland cement is made from limestone or chalk and shale or clay (i.e. calcium carbonate and siliceous
material). There are two main methods of cement manufacture, the wet process and the more modern dry
process. In the wet process, soft raw materials are reduced to a water suspended-slurry in wash mills, hard
oversized material being separated by screens and ground in a tube mill. The slurry has a creamy consistency
and a water content of approximately 40%. The slurry is pumped to storage tanks, which are continuously
agitated to prevent the solid particles from settling out. Because the raw materials can contain varying
amounts of calcium and silica, it may be necessary to blend different slurries in order to obtain the desired
chemical composition before feeding into the kiln.
In the dry process, the materials are crushed and fed through a raw mill, which reduces them to a fine meal.
The meal is then stored in a silo from where it is transported to the kiln pre-heater. The material then cascades
downwards while warm exhaust gas from the kiln passes through it. The raw materials are fed through the kiln,
which can be up to 250 m long and 6m in diameter (the length of the kiln depends on which process is used). In
the kiln-firing zone, the material reaches a temperature of 1400 C before leaving the kiln in the form of clinker.
The clinker is rapidly cooled and stored until required for milling, when it is fed into cement mills where about
3-5% gypsum is added to control the setting of the finished product and the materials are ground to the
required fineness. Increasingly, other additives which impart water-reducing properties to the cement and aid
grinding are incorporated during the grinding stage. The cement is then fed to storage silos until required for
delivery or diverted to a bagging plant
The best available techniques (BAT) for the production of clinker is the dry process kiln with multi-stage
preheating and pre-calcination (a six-stage pre-heater and pre-calciner kiln); here the energy consumption
ranges between 2.9 GJ to 3.3 GJ per ton of clinker. For this reason, the percentage of the dry process use in the
EU production in the cement industry has increased from 78 % in 1997 to 90 % in 2008.
17
BENCHMARKING REPORT OF THE SECTOR CEMENT
Clinker plants with the lowest final energy consumption are operated in India at 3.1 GJ per ton of clinker
followed by the plants in the Pacific region and developing Asia at around 3.3 GJ per ton. The least energy
efficient plants are located in North America at 4.2 GJ per ton and in EIT countries (countries with Economies in
Transition) at 6 GJ per ton.
11. Misr Beni Suef Cement 3.00 Egyptian joint stock company
18
BASIC SECTOR INFORMATION
12. Misr Cement (Qena) 1.90 ASEC cement owns 27.55% of the
company, and the remaining percentage
is owned by other shareholders
13. Arab Swiss Engineering (ASEC) 2.00 45.1% of the company is owned by ASEC
and the remaining percent is owned by
other shareholders
17. Building Materials Industries 1.50 Subsidiary company of the Egypt Kuwait
Company Holding (EKH)
This is the basic cement and is commonly used for general construction work. This cement is frequently
combined with ground granulated blast furnace slag or pulverized fuel ash. It consists mainly of Portland
cement and up to 5% of minor additional constituents.
This cement is normally made by grinding the same clinker as CEM I 42.5 N to a great fineness in order to
prevent the rapid set that occurs in CEM I 42.5 N. Extra gypsum is usually added at the grinding stage. CEM I
42.5 R or 52.5 N is used where there is a requirement for early strength, for example in precast applications. It
consists of Portland cement and up to 35% of certain other single constituents.
19
BENCHMARKING REPORT OF THE SECTOR CEMENT
To produce this cement, iron oxide is added to the raw feed in the kiln that results in the production of a
material low in tricalcium aluminate (C3A). This is the compound that reacts with sulfates to potentially result in
sulfate attack, which may lead to the disintegration of the hardened mortar. The increased iron oxide content
gives sulfate resisting Portland cement a darker color than plain Portland cement. Sulfate resisting Portland
cement is often ground finer than CEM I Class (42.5 N) in order to compensate for the reduced early strength
caused by its low C3A content.
This cement is produced by blending or grinding 6-20% of ground limestone with Portland cement.
5. CEM II/B
This cement type is made by grinding together silicate clinker, granulated blast furnace slag, fly ash and
gypsum. Slag and fly ash adjust the cement content and decrease hydration heat and its cement content is
max. 35%. Gypsum acts as a regulator preventing cement flash setting.
The molten slag from the production of iron in a blast furnace is rapidly cooled by high pressure water jets that
subjects the slag to instantaneous solidification in the form of granules - these are then dried and ground to a
similar fineness to CEM I Class (42.5 N) in the mill. It may be described as a latent hydraulic material, which
means it will gain strength on its own, but very slowly. It consists of Portland cement and higher proportions of
blast furnace slag than in CEM II cement.
The following table describes the main cement products produced by each cement plant in Egypt.
20
BASIC SECTOR INFORMATION
8. Titan Egypt 8.a. Titan Egypt Beni Suef CEM II / B-L 32.5 R
8.b. Alexandria Portland CEM II /A-L 42.5 R
Cement CEM I 42.5 R
21
BENCHMARKING REPORT OF THE SECTOR CEMENT
The main cement product in most of the Egyptian cement plants is CEM I 42.5. Other types of cement products
are produced with fewer quantities or as per the market request. Consequently, it can be considered that the
main product is CEM I 42.5 and there is no need to create a benchmark cluster based on the type of cement
product with different energy intensities.
For this specific plant with published data, the total energy consumption (thermal and electrical) was estimated
to be 10,683,213 GJ/year with a net profit of 399,368,311 EGP/year. The ratio of energy consumption to the
net profit of this company is estimated to be (MJ/EGP) is 26.75 MJ/EGP.
22
BASIC SECTOR INFORMATION
For the cement industry the main driver for energy consumption is the production process of clinker. About
96% of the total energy consumption is used for producing clinker in the kilns.
According to the BAT Reference Document for the production of cement, lime and magnesium oxide, several
factors affect the energy consumption of modern kiln systems, such as:
A much smaller part of the total energy consumption is used for raw materials preparation and grinding the
clinker to cement.
The energy consumption differs also by the type of cement produced. The most energy intensive product is the
Portland cement, followed by cement with less than 25% fly ash and finally, the least energy intensive cement
is the “cement with 65% blast furnace slag”.
The following table shows the different energy inputs for raw material preparation, solid fuels preparation,
clinker making, additives preparation and finish grinding cement.
23
BENCHMARKING REPORT OF THE SECTOR CEMENT
Table 10: Overview of Specific Energy Consumption of Different Production Processes for Different Cement Types (Ernst
Worrell, 2008)
Production Process Portland Cement Cement < 25% Fly Ash Cement 65% Blast
Furnace Slag
The Egyptian cement sector consumes around 4,953 Million m³/year, and around 1.4 Million tons of Mazout
per year, with limited amount of diesel consumption (around 43,377 tons/year). The total thermal energy
1
consumption of the Egyptian cement sector is estimated to be 245,927,986 GJ/year .
1
These figures were obtained from IDA’s database for year 2013. However, the data of some plants were missing/not correct, so their
values were obtained from the UNIDO’s data collection sheets.
24
BASIC SECTOR INFORMATION
Two of the nine plants are currently in the process of implementing an Energy Management System according
to ISO 50001 with the support from the UNIDO IEE Project.
25
ANALYSIS OF RESULTS
4 Analysis of Results
For the purpose of this study, 18 cement companies were contacted out of the 20 companies in the Egyptian
cement sector, and the remaining two companies were not contacted due to the unavailability of the correct
contacts information. Ten site visits were conducted and one company was contacted through the phone in
order to present the benefits of the project and the methodology of data collection. However, only nine
companies agreed to participate, and two of the participating companies did not provide complete data. In
addition, the publicly available data of two companies have been analyzed in the study; however, their data of
was found to be incomplete.
The methodology of data collection involved sending a simplified data collection sheet to the companies that
were contacted via phone or e-mail before the site visit, and presenting and discussing the detailed data
collection sheet during the site visit. Some companies had concerns regarding the confidentiality of the data
provided from their side, and this issue was solved by signing a confidentiality letter with UNIDO. Frequent
communication was maintained with the participating companies after the site visits to follow up on the data
collection and also to address their inquiries regarding the detailed data collection sheets.
The cement production capacities of the 11 analyzed plants out of the 22 cement plants represent around 30%
of the total production capacity of the Egyptian cement industry.
The following table represents the cement production volume of the analyzed companies for years 2010, 2011,
2012, 2013 and 2014.
27
BENCHMARKING REPORT OF THE SECTOR CEMENT
2
Design 2010 2011 2012 2013 2014
Capacity
(t cement/a) (t cement/a) (t cement/a) (t cement/a) (t cement/a)
(t cement/a)
Sum 22,100,000
The total design capacity of the 11 analyzed plants represents about 30% of the total design capacity of the
whole sector. Plant number 1 was deleted from further analysis as it was identified as an outlier and the
company could not verify the data.
2
Data of the 1st quarter only of year 2014
28
ANALYSIS OF RESULTS
The following conversion factors were used to calculate the energy consumption of the analyzed companies.
The following tables represent the amount of thermal energy consumed and cement produced annually by the
analyzed cement plants. All gathered data are along the range of years from 2010 to 2014. The common fuels
that are used in the Egyptian cement industry are Natural Gas, Mazout and Diesel. It is worth mentioning that
the available data for plants 10 and 11 were the production data and thermal energy consumption data only.
During the quality control stage, data for plant 1 was identified as an outlier. The plant was contacted to verify
the data but no reply was received. Therefore, the team decided to drop the data for this specific plant from
further analysis.
3
The NCVs obtained from IPCC 2006 Guidelines are the default values
29
BENCHMARKING REPORT OF THE SECTOR CEMENT
Plant No. 2010 2011 2012 2013 2014 Avg. Thermal Energy Avg. SEC
Consumption
GJ/year GJ/t GJ/ year GJ/t GJ/ year GJ/t GJ/ year GJ/t GJ/ year GJ/t GJ/ year GJ/t cement
Plant 7 2,616,173 3.60 2,607,391 3.33 2,628,153 3.06 2,488,604 2.93 2,585,080 3.21
30
ANALYSIS OF RESULTS
Figure 4 illustrates the range of thermal SEC among the analyzed companies. The figure demonstrates that the
specific thermal energy consumption of the analyzed companies falls within the average range of the
developing countries, as described in chapter 2 of the study.
3.5
2.5
1.5
0.5
0
Plant 3 Plant 7 Plant 6 Plant 5 Plant 4 Plant 9 Plant 8 Plant 10 Plant 11 Plant 2
Table 15 demonstrates the electrical energy consumed annually by the analyzed cement plants, gathered in the
range of years from 2010 to 2014.
31
BENCHMARKING REPORT OF THE SECTOR CEMENT
Figure 5 illustrates the range of electrical SEC among the analyzed companies. The figure demonstrates that
the specific electrical energy consumption for most of the analyzed companies (except for plant 9) falls within
the average range of the developing countries, as described in chapter 2 of the study.
SEC (kWh/t)
250
200
150
100
50
0
Plant 5 Plant 8 Plant 2 Plant 6 Plant 3 Plant 4 Plant 7 Plant 9
32
ANALYSIS OF RESULTS
The international BPT EPI (Worrel 2008, page 24) of 2.92 GJ/t cement contains the thermal (2.71 GJ/t cement)
and electricity (0.21 GJ/t cement) consumption.
Table 16 demonstrates the total energy (thermal and electrical) consumed annually by the analyzed cement
plants, gathered in the range of years from 2010 to 2014.
33
BENCHMARKING REPORT OF THE SECTOR CEMENT
Table 16: Overview Energy Consumption and Specific Energy Consumption of Analyzed Plants: Thermal, Electrical and Total
Plant No. Average Average Thermal Average electrical Average Total Specific Thermal Specific Electrical Specific Total
Production Energy Energy Energy Energy Energy Energy
(t/year) Consumption Consumption Consumption Consumption Consumption Consumption
34
ANALYSIS OF RESULTS
Figure 6 illustrates the range of the total SEC (thermal and electrical) among the analyzed companies.
The figure demonstrates that the specific energy consumption of the analyzed companies falls within
the average range of the developing countries, as described in chapter 2 of the study, however,
above the BAT. Plant number 10 and 11 did not indicate the electrical consumption, for those plants
the total consumption is corresponding to the thermal consumption.
The energy cost for each analyzed company was calculated based on the information regarding the energy
consumption that was provided by each company. The energy cost calculations are based on the unit energy
rates provided in the following table.
35
BENCHMARKING REPORT OF THE SECTOR CEMENT
Figure 7: Energy Cost for Cement Production in the Analyzed Companies (2010 – 2014)
The energy cost of the analyzed plants in year 2010 ranged from 91 EGP/t to 118 EGP/t with an average of
104 EGP/t, while the energy cost of the analyzed plants in year 2011 ranged from 57 EGP/t to 115 EGP/t with
an average of 84 EGP/t, and the energy cost of the analyzed plants in year 2012 ranged from 95 EGP/t to
146 EGP/t with an average of 112 EGP/t, followed by an increase in the Mazout price in year 2013 from
1,000 EGP/t to 1,500 EGP/t, to raise the energy cost range of the analyzed companies to range between
105 EGP/t to 167 EGP/t. It is worth mentioning that the only analyzed company in year 2014 generates its own
electricity.
4
The unit prices of energy for year 2014 are for the 1st quarter only, before the government issued the new energy tariffs.
36
ANALYSIS OF RESULTS
The following criteria have been defined in order to determine the status of energy management system
implementation in each cement plant:
Table 18 summarizes the status of energy management system implementation in the analyzed cement plants.
Table 18: Status of Energy Management System Implementation in the Analyzed Cement Plants
Criteria C1 C2 C3 C4 C5 C6 C7 C8 C9
37
BENCHMARKING REPORT OF THE SECTOR CEMENT
The EPIs were calculated as average values from the data collected for the years 2010 – 2014.
Table 19: Specific Thermal Energy Consumption of Analyzed Cement Plants (GJ/t)
5
Average values for production and specific thermal energy consumption are taken for years 2010 – 2013 and year 2014 only for plant 9
38
ANALYSIS OF RESULTS
Figure 8: Specific Thermal Energy Consumption Benchmark Curve for Cement Production
The thermal energy consumption EPI corresponding to the national BAT value = 3.17 GJ/t cement
The thermal energy consumption EPI corresponding to the national BPT value = 3.21 GJ/t cement
The thermal energy consumption EPI corresponding to the international BAT value = 2.71 GJ/t cement
39
BENCHMARKING REPORT OF THE SECTOR CEMENT
Table 20: Specific Electrical Energy Consumption of Analyzed Cement Plants (kWh/t)
6
Average values for production and specific thermal energy consumption are taken for years 2010 – 2013 and year 2014 only for plant 9.
40
ANALYSIS OF RESULTS
The electrical energy consumption EPI corresponding to the national BAT value = 85 kWh/t cement
The electrical energy consumption EPI corresponding to the national BPT value = 91 kWh/t cement
The electrical energy consumption EPI corresponding to the international BAT value = 56 kWh/t
cement
The most important benchmark curve is shown in figure 10 representing the total specific energy consumption.
Table 21: Specific Total Energy Consumption (Thermal & Electrical) of the Analyzed Cement Plants (GJ/t)
The total energy consumption EPI corresponding to the national BAT value = 3.53 GJ/t cement
The total energy consumption EPI corresponding to the national BPT value = 3.62 GJ/t cement
The total energy consumption EPI corresponding to the international BAT value = 2.92 GJ/t cement
For two analyzed companies the electrical energy consumption was not available. Therefore the benchmark
curve for the total consumption contains only eight data sets.
The international benchmarks (Table 22) for cement industry are available for specific thermal energy
consumption, specific electrical energy consumption and the total specific energy consumption.
7
Average values for production and specific thermal energy consumption are taken for years 2010 – 2013 and year 2014 only for plant 9.
41
BENCHMARKING REPORT OF THE SECTOR CEMENT
Table 22: International BAT for Thermal, Electrical and Total Energy Consumption
Electricity 0.08
Figure 10: Total Specific Energy Consumption Benchmark Curve for Cement Sector
42
ANALYSIS OF RESULTS
The most efficient plant produces 27% of the production of all analyzed companies shown in Figure
10. The specific energy consumption of the most efficient plant represents the national BAT value
and is 3.53 GJ/t cement. The international BAT value is 2.92 GJ/t cement.
Table 23: Energy Cost per Ton of Cement for the Examined Sample Plants
Plant 3 91 59 107 - - 86
Plant 5 - 75 112 - - 94
43
BENCHMARKING REPORT OF THE SECTOR CEMENT
200
180
160
140
2010
120
2011
EGP/t
100 2012
80 2013
2014
60
40
20
-
Plant 2 Plant 3 Plant 4 Plant 5 Plant 6 Plant 7 Plant 8 Plant 9
Figure 11: Energy Cost Benchmark Curve for the Cement Sector
Plant number 9 started its operation at the end of the year 2013 therefore they could only report data from the
first quarter of 2014. This plant generates its own electricity and does not purchase electricity from the
national network.
The potential savings calculated by applying only the specific thermal energy or electricity consumption is only
a theoretical value. The most important and realistic saving potential is the one corresponding to the total
energy consumption.
The national BAT for total energy consumption is 3.53 GJ/t. The annual saving potential of the analyzed
companies in comparison to “plant 3” is 6,920,611 GJ or 11%.
44
ANALYSIS OF RESULTS
Table 24: Potential Savings Calculated with Specific Total Energy Consumption
SUM 6,920,613
Comparing the thermal and electrical BAT brings not the same results as the calculation with the total specific
energy consumption BAT. This is caused by the fact, that a company which has the lowest thermal energy
consumption does not necessarily have to have also the lowest consumption in electrical energy.
SUM 8,665,709
The lowest thermal SEC (GJ/t) was found to be in plant 3 (3.17 GJ/t).
45
BENCHMARKING REPORT OF THE SECTOR CEMENT
(EGP/t) Average Production (t/year) SEC (kWh/t) Saving Potential (%) Saving Potential
(MWh)
Plant 5 2,026,730 85 0% -
SUM 177,207
The lowest electrical SEC (kWh/t) was found to be in plant 5 (85 kWh/t).
Potential of whole sector = (BAT international – weighted SEC of analyzed companies) * production of the
whole sector
Table 27: Annual Total Energy Saving Potential for the Whole Sector
Table 28: Annual Thermal Energy Saving Potential for the Whole Sector
Current Thermal
Total Technical
Annual Production Specific Energy BAT Benchmark Percent Reduction
Potential
(weighted average)
t/year GJ/t GJ/t % GJ/year
46,500,000 3.71 2.71 -37% 46,500,000
46
ANALYSIS OF RESULTS
Table 29: Annual Electrical Energy Saving Potential for the Whole Sector
Current Electrical
Total Technical
Annual Production Specific Energy BAT Benchmark Percent Reduction
Potential
(weighted average)
t/year GJ/t GJ/t % GJ/year
46,500,000 0.407 0.21 -94% 9,160,500
As the weighted specific electricity consumption was only calculated with data of 8 analyzed plants and the
weighted specific thermal energy consumption was calculated with data of all 10 analyzed plants, the total
energy saving potential differs a bit from the sum of electrical and thermal potential.
Frozen efficiency: No additional energy efficiency savings are made. The current levels of energy
efficiency are not improved upon.
Baseline efficiency: Energy efficiency improves at a rate of 0.3% a year.
BPT scenario: All plants are operating at the current levels of BPT by 2030. This is equivalent to an
energy efficiency improvement of 1.65% a year in the period 2012 to 2030. The BPT is the lowest
known BPT, either on international or on national level. For the cement sector the international BPT
value was chosen (3.02 GJ/t cement).
All plants are operating at the current levels of BPT by 2050. This is equivalent to an energy efficiency
improvement of 0.78% a year in the period 2012 to 2050.
BAT scenario: All plants are operating at the current levels of BAT by 2030. This is equivalent to an
energy efficiency improvement of 1.84% a year in the period 2012 to 2030. The BAT is the lowest
known BAT, either on international or on national level. For the cement sector the international BAT
value was chosen (2.92 GJ/t cement).
All plants are operating at current levels of BAT by 2050. This is equivalent to an energy efficiency
improvement of 0.87% a year in the period 2012 to 2050.
An important factor for drawing the scenarios is the rate of production growth. The production of the cement
sector in 2050 will be about three times higher than today. For deriving the production values for the cement
sector in 2050 the following approach was chosen:
In the IEA publication Energy Technology Transitions for Industry (IEA/OECD, 2009) the demand for
cement is projected. The cement demand is projected for the low- and high demand cases from 2005
to 2050, with additional projection for 2015 and 2030.
The cement demand is shown as “per capita (kg/cap)” for the regions “South Africa” and “Other
Africa”.
For the saving scenarios the value for “Other Africa” was chosen and corrected to get the value for
2012 and the corresponding increase to 2030 and 2050.
Furthermore the average between high and low demand was chosen. For cement demand it is 1.86.
In addition the population growth for Egypt for this period was taken from the United Nations, World
Population Prospects: The 2012 Revision, available on:
http://esa.un.org/wpp/unpp/panel_population.htm
47
BENCHMARKING REPORT OF THE SECTOR CEMENT
From this source the factor for the population growth between 2012 and 2050 for Egypt was taken.
This factor is 1.51.
To get the factor for the increase in the demand between 2012 and 2050 those two factors are
multiplied. For cement the factor is 2.8 until 2050 and 1.7 until 2030.
The factor for the increase in the demand between 2012 and 2030 is for cement 1.70.
Figure 12: Total Energy Consumption in Egyptian Cement Industry, Four Scenarios 2012-2030
Figure 13: Total Energy Consumption in Egyptian Cement Industry, Four Scenarios 2012-2050
48
ANALYSIS OF RESULTS
Figure 14: Total Energy Consumption in Egyptian Cement Industry in 2030 and 2050 according to the four Scenarios
In order to reach the saving of 88,536,000 GJ in 2030 the sector would need to implement energy saving
measures of about 4,900,000 GJ per year. Per company this means annual savings of about 224,000 GJ. To
reach the saving of 145,824,000 GJ in 2050 the sector would need to implement energy saving measures of
about 3,800,000 GJ per year. Per company this means annual savings of about 174,000 GJ.
The following table shows the energy saving of all cement plants in Egypt in the year 2030 and 2050 if all
companies reach the BAT value. Furthermore it shows the cumulated energy savings from 2012 to 2030 or
2050.
Table 30: Energy Savings in 2030 and 2050 and Cumulative Savings until 2030 and 2050
Year Frozen Scenario Baseline BPT Scenario BAT Scenario Savings Frozen - Cumulative
(GJ) Scenario (GJ) (GJ) (GJ) BAT Scenario Savings BAT
(GJ) Scenario (GJ)
2012 187,860,000 187,860,000 187,860,000 187,860,000
2030 319,362,000 302,549,000 238,731,000 230,826,000 88,536,000 750,459,000
2050 526,008,000 469,254,000 393,204,000 380,184,000 145,824,000 10,651,332,000
49
BENCHMARKING REPORT OF THE SECTOR CEMENT
Low cost energy efficiency measures: Energy efficiency measures with capital cost ranging from 0 – 1
US$/t cement
Medium cost energy efficiency measures: Energy efficiency measures with capital cost ranging from 1
– 3 US$/t cement
High cost energy efficiency measures: Energy efficiency measures with capital cost > 3 US$/t cement.
As shown in the below table, the cost of some energy efficiency measures may range between low-medium or
medium-high cost; depending on the size of retrofit and the amount of energy saving achieved.
50
ANALYSIS OF RESULTS
Energy Efficiency Measure Investment Cost Plant 3 Plant 4 Plant 6 Plant 8 Plant 9
Process Control Vertical Mill Low cost Yes Yes Yes Yes Yes
2. Clinker Production
Improved refractories Low cost Yes Yes N/A, the plant is Yes Yes
new
Kiln shell heat loss reduction Low cost Yes Yes N/A, the plant is No Yes
new
Energy management & process control Low cost Yes No N/A, the plant is Yes Yes
new
Adjustable speed drive for kiln fan Low cost Yes Yes N/A, the plant is Yes Yes
new
51
BENCHMARKING REPORT OF THE SECTOR CEMENT
Energy Efficiency Measure Investment Cost Plant 3 Plant 4 Plant 6 Plant 8 Plant 9
3. Preheater kiln upgrade to precalciner High cost N/A, the plant is Yes N/A, the plant is Yes No
kiln new new
4. Long dry kiln upgrade to High cost N/A, the plant is No N/A, the plant is Yes No
preheater/precalciner kiln new new
5. Older dry kiln upgrade to multi-stage High cost N/A, the plant is No N/A, the plant is Yes No
preheater kiln new new
6. Convert to reciprocating grate cooler Medium N/A, the plant is No N/A, the plant is Yes No
new new
7. Kiln combustion system Low cost N/A, the plant is No N/A, the plant is Yes No
improvements new new
8. Indirect Firing High cost N/A, the plant is No N/A, the plant is No No
new new
9. Optimize heat recovery/upgrade Low cost N/A, the plant is No N/A, the plant is Yes No
clinker cooler new new
10. Seal replacement Low cost N/A, the plant is No N/A, the plant is Yes No
new new
11. Low temperature heat recovery for Medium-High cost N/A, the plant is No N/A, the plant is No No
power (capital costs given in $/kW) new new
12. High temperature heat recovery for High cost N/A, the plant is No N/A, the plant is No In progress
power new new
13. Low pressure drop cyclones Medium cost Yes No N/A, the plant is Yes Yes
new
52
ANALYSIS OF RESULTS
Energy Efficiency Measure Investment Cost Plant 3 Plant 4 Plant 6 Plant 8 Plant 9
14. Efficient kiln drives Low cost Yes Yes N/A, the plant is Yes Yes
new
Energy Management & Process Low cost Yes No Yes Yes Yes
Control
Adjustable Speed Drives Low cost yes Yes Yes Yes Yes
Optimization of Compressed Air Systems Low cost yes No Yes Yes Yes
53
BENCHMARKING REPORT OF THE SECTOR CEMENT
Energy Efficiency Measure Investment Cost Plant 3 Plant 4 Plant 6 Plant 8 Plant 9
54
RECOMMENDATIONS
5 Recommendations
1. Each company has to report relevant data like energy consumption and production volumes on a
regular basis (monthly/yearly) to the statistical authorities. A standardized data collection
template should be applied. This template can be elaborated based on the data collection sheet
for the analysis in the participating companies.
2. Collection and aggregation of data should be done by the statistical authorities.
3. The statistical authorities should publish the aggregated data annually.
4. Regarding to the collected data an energy balance should be established.
To support the energy relevant statistical process the following steps and requirements are important:
In companies not having an energy management system in place there is no structured approach to improve
their energy performance. Although the possibilities to improve the energy performance may be known, either
identified within an energy audit or by internal staff, the measures are not simply implemented. This is due to
several reasons, one being that the top-management or other key stakeholders oppose such measures or
prefer other investment measures with better return on investment. In case the measures are implemented,
often the energy consumption starts to rise again after a certain time because there is a lack of precise roles
and responsibilities for maintaining the optimized systems.
Therefore a systematic approach is needed. Energy management can offer this approach: First of all, energy
must be a key topic in the company, from top-management down to all employees all relevant persons shall be
engaged in saving energy. Clear target setting and the follow-up of saving measures ensure that energy
efficiency steadily increases. Systematic energy management as systematic tracking, analysis and planning of
energy use is one of the most effective approaches to improve energy efficiency in industries ( (IEA, 2012).
Energy management programmes are policies and initiatives that encourage companies to adopt energy
management.
55
BENCHMARKING REPORT OF THE SECTOR CEMENT
There are various approaches to implement energy management programmes in a country or a region. The
approach depends on the existing policy framework, objectives, industrial composition and other country- or
region-specific factors.
Energy management programmes are most effective when planned and implemented as part of broader
energy efficiency agreements with the government. During the planning stage the purpose of the program
should be articulated, including inter-linkages with other policies. Important design steps include establishing
what support systems need to be created to boost implementation, how progress will be monitored, and
setting up plans for evaluating the results of the program. The success of the energy management program is
clearly correlated with the provision of appropriate resources and supporting mechanisms, including
assistance, capacity building and training, and provision of tools and guidance during the implementation
stage.
The main objectives of energy management programmes are to decrease industrial energy use and reduce
greenhouse-gas emissions. If properly designed they also can help attain other objectives. By supporting
industry in using energy more productively they can boost competitiveness and redirect savings to more
productive uses and reduce maintenance cost.
A further benefit is that energy management programmes are flexible instruments that can be adapted to
changing policy needs and changes in industry thereby ensuring continued effectiveness and relevance. By
continuously monitoring implementation and through regular evaluation, policy makers can identify
opportunities to include new mechanisms or establish linkages to emerging policies.
In implementing energy management programmes, governments can play an important role in establishing a
framework to promote uptake of energy management systems, by developing methodologies and tools, and
promoting the creation of new business opportunities in the area of energy services. Energy management
programmes can tend to achieve significant and sustainable savings at very low cost in the initial years.
Energy audit programmes are a very cost efficient way to reach national targets on greenhouse gas reduction
or increase of energy efficiency. From the energy audits, energy saving potentials and saving measures are
identified. The companies and organisations then decide whether to carry out saving measures or not, or put
them in a framework for a more years investment and execution planning.
From the policy design point of view, an energy audit program usually consists of several elements:
The implementing instruments like the legislative framework, the subsidy /financial scheme and other
incentives/promotion and marketing activities.
The administration of the program with the interaction of the key players: the administrator (very
often a government level body), the operating agent (e.g. an energy agency), the auditors and the
participating organizations. The operating agent is responsible for the development of the energy
audit models and the monitoring system.
Quality assurance comprises the training and/or the authorization of the auditors and the quality
control (checking of the reports).
In addition, audit tools should be made available.
56
6 Literature
Ernst Worrell, L. P. (2008). World Best Practice Final Energy Intensity Values for Selected Industrial
Sectors. Ernest Orlando Lawrence Berkeley National Laboratory.
European Commission. (2013). Best Available Techniques (BAT) Reference Document for the
Production of Cement, Lime and Magnesium Oxide. Luxembourg: Joint Research Centre of
the European Commission.
IEA. (2012). Energy Management Programmes for Industry. Paris: International Energy Agency.
UNIDO. (2010). UNIDO Working Paper on Global Industrial Energy Efficiency Benchmarking. United
Nations Industrial Development Organization.
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7 Abbreviations
AEA Austrian Energy Agency
BAT Best Available Technology
BPT Best Practice Technology
CAPMAS Central Agency for Public Mobilization and Statistics
CHP Combined Heat and Power
EE Energy Efficiency
EEI Energy Efficiency Index
EPI Energy Performance Indicator
IEA International Energy Agency
IDA Industrial Development Authority
IEE Industrial Energy Efficiency
PV Photovoltaic
SEC Specific Energy Consumption
SME Small and Medium Sized Enterprise
TFEU Total Final Energy Use
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8 List of Figures
Figure 1: Illustrative Energy Benchmark Curve for the Manufacturing Industry (UNIDO, 2010) ........... 3
Figure 2: General overview of a cement making process, (European Commission, 2013) .................... 6
Figure 3: International Benchmark Curve for Clinker Production, 2007 (UNIDO, 2010) ...................... 11
Figure 4: Range of Thermal SEC among the Analyzed Companies........................................................ 31
Figure 5: Range of Electrical SEC among the Analyzed Companies ...................................................... 32
Figure 6: Range of SEC among the Analyzed Companies ...................................................................... 35
Figure 7: Energy Cost for Cement Production in the Analyzed Companies (2010 – 2014) ................... 36
Figure 8: Specific Thermal Energy Consumption Benchmark Curve for Cement Production ............... 39
Figure 9: Specific Electricity Consumption Benchmark Curve for Cement Production ........................ 40
Figure 10: Total Specific Energy Consumption Benchmark Curve for Cement Sector .......................... 42
Figure 11: Energy Cost Benchmark Curve for the Cement Sector ........................................................ 44
Figure 12: Total Energy Consumption in Egyptian Cement Industry, Four Scenarios 2012-2030 ........ 48
Figure 13: Total Energy Consumption in Egyptian Cement Industry, Four Scenarios 2012-2050 ........ 48
Figure 14: Total Energy Consumption in Egyptian Cement Industry in 2030 and 2050 according to the
four Scenarios........................................................................................................................................ 49
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9 List of Tables
Table 1: Overview of Companies Selected for Data Collection............................................................... 8
Table 2: Schedule for data collection ...................................................................................................... 9
Table 3: Energy Intensity Values for Clinker Making (Ernst Worrell, 2008) .......................................... 10
Table 4: Summary of World Best Practice Final Energy Intensity Values for Selected Products of the
Cement Industry (Ernst Worrell, 2008) ................................................................................................. 11
Table 5: Overview of Energy Performance Indicators for the Cement Industry (UNIDO, 2010) .......... 12
Table 6: BAT-Associated Energy Consumption Levels (European Commission, 2013) ......................... 13
Table 7: Number of Cement Companies in Egypt and their Ownership ............................................... 18
Table 8: Main Cement Products Produced by Each Cement Plant in Egypt ......................................... 20
Table 9: The Main Investigated Markets of a Sample of Egyptian Cement Plants. .............................. 23
Table 10: Overview of Specific Energy Consumption of Different Production Processes for Different
Cement Types (Ernst Worrell, 2008) ..................................................................................................... 24
Table 11: Conversion factors ................................................................................................................. 24
Table 12: Production Volume of Analyzed Companies ......................................................................... 28
Table 13: Conversion factors ................................................................................................................. 29
Table 14: Thermal energy consumed by the analyzed cement plants.................................................. 30
Table 15: Electric Energy Used by Each Plant ....................................................................................... 32
Table 16: Overview Energy Consumption and Specific Energy Consumption of Analyzed Plants:
Thermal, Electrical and Total................................................................................................................. 34
Table 17 : Unit Prices of Energy ............................................................................................................ 36
Table 18: Status of Energy Management System Implementation in the Analyzed Cement Plants .... 37
Table 19: Specific Thermal Energy Consumption of Analyzed Cement Plants (GJ/t)............................ 38
Table 20: Specific Electrical Energy Consumption of Analyzed Cement Plants (kWh/t) ....................... 40
Table 21: Specific Total Energy Consumption (Thermal & Electrical) of the Analyzed Cement Plants
(GJ/t)...................................................................................................................................................... 41
Table 22: International BAT for Thermal, Electrical and Total Energy Consumption ........................... 42
Table 23: Energy Cost per Ton of Cement for the Examined Sample Plants ........................................ 43
Table 24: Potential Savings Calculated with Specific Total Energy Consumption................................. 45
Table 25: Potential Savings in Thermal Energy ..................................................................................... 45
Table 26: Potential Savings in Electrical Energy .................................................................................... 46
Table 27: Annual Total Energy Saving Potential for the Whole Sector ................................................. 46
Table 28: Annual Thermal Energy Saving Potential for the Whole Sector ............................................ 46
Table 29: Annual Electrical Energy Saving Potential for the Whole Sector .......................................... 47
Table 30: Energy Savings in 2030 and 2050 and Cumulative Savings until 2030 and 2050 .................. 49
Table 31: Status of Energy Efficiency Measures Implementation ........................................................ 51
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