KR100814615B1 - Cogeneration system using compression type cycle and absorption type cycle - Google Patents

Abstract

A cogeneration system using compression/absorption type cycles is provided to carry out heat exchange between cold water circulating an evaporator of an absorption type cycle and vapor refrigerant of a compression type cycle, drive an absorption unit and a compression unit by partial electricity and exhaust gas of a single driving source. A cogeneration system using compression/absorption type cycles includes a driving source(10) for supplying exhaust gas and electricity, and an absorption unit(A) connected to the driving source for transferring heat of the exhaust gas to a high temperature regenerator(20) and having an absorber(28) and a condenser(24) for operating refrigerant vapor of the high temperature regenerator in an absorption cycle. A compression unit(B) is connected to the driving source and has a condenser(42), first and second expansion valves(44,46) and an evaporator(48) for operating gas refrigerant of high temperature and high pressure in a compression type cycle by the electricity of the driving source. A first heat exchange line(34) is mounted to an evaporator(26) of the absorption unit and circulates cooling water for the heat exchange between evaporation latent heat and the cooling water. A second heat exchange line(52) is connected to a connection line(50) of the first and second expansion valves via a bypass for carrying out heat exchange between refrigerant vapor and the cooling water. A third heat exchange line(56) is mounted to the evaporator of the compression unit for utilizing the cooling water carrying out heat exchange with the evaporation latent heat as water for cooling operation.

Description

Cogeneration System Using Compression Type Cycle and Absorption Type Cycle

1 is a conceptual diagram showing the configuration of the combined heat and power generation system using the absorption and compression cycle according to the present invention.

FIG. 2A is an essential part view of the second heat exchanger and the compression apparatus of FIG. 1. FIG.

FIG. 2B is a p-h diagram for FIG. 2A.

<Description of main parts of drawing>

10: driving source 12: first heat exchanger

14 high temperature water jacket coolant line 16 low temperature water jacket coolant line

18: exhaust gas supply line 20: high temperature regenerator

22,48 Line 24,42 Condenser

26: evaporator 28: absorber

30: exhaust line 32, 34, 36, 52, 56: heat exchange line

38: second heat exchanger 40: compressor

44: first expansion valve 46: second expansion valve

54: power line

The present invention relates to a combined heat and power generation system using absorption and compression cycles, and in the present invention, the absorption and compression apparatuses can be operated by using a part of the power provided from the driving source and the arrangement of the exhaust gases. The low-temperature cooling water that exchanges heat with the evaporative latent heat of the evaporator in the absorption cycle and some refrigerant vapors formed while passing through the first expansion valve in the compression cycle can be heat-exchanged with each other. The refrigeration capacity is further increased to efficiently perform district cooling using the array.

In general, a cogeneration system (Cogeneration System) is a power generation system that increases the energy utilization rate by simultaneously producing power and heat supply through power generation.

Specifically, when using a combined heat and power generation system that simultaneously generates power and exhaust gas arrays while a driving source such as an engine or a turbine is running, individual boiler operation for heating and hot water use in a consumer and power provided by a power company All of them can be done on their own, without relying on the energy savings.

The above combined heat generation system differs slightly depending on the type or type of driving source, but for example, when the driving source is a gas engine, the arrangement is generated by exhaust gas of about 120 ° C and cooling water of 90 ° C, and in the case of a turbine An arrangement is generated with exhaust gas of about 300 ° C., and hot water and heating are performed using this arrangement.

However, when the exhaust gas array is used as a heat source for cooling rather than heating in the combined heat and power generation system, the cooling efficiency is not good because a heavy water absorption chiller having a low coefficient of performance must be separately installed.

In addition, an exhaust gas absorption chiller using the exhaust gas as a heat source may be used, but also the efficiency is not good because the grade factor is not high, and as mentioned above, a heavy water absorption refrigerator should be installed as essential.

Therefore, due to the above problems, it is difficult to perform district cooling with the thermally integrated power generation system currently used, and thus there is a limit to increasing the efficiency of energy use.

The present invention has been invented to solve the above problems, the object of the present invention is to improve the new type to operate the absorption device and the compression device through a single drive source, the district cooling can be performed efficiently in summer It is an object of the present invention to provide a combined heat generation system using absorption and compression cycles.

The present invention for achieving the above technical problem, the drive source for providing exhaust gas and power; An absorbent device comprising an absorber and a condenser connected to the drive source so that the exhaust gas array provided from the drive source is transferred to the high temperature regenerator and the refrigerant vapor formed in the high temperature regenerator is operated in an absorption cycle; Compression type including a condenser, first and second expansion valve, the evaporator is connected so that the power provided from the drive source is applied to the compressor along the power line so that the high temperature and high pressure gas refrigerant formed by the driving of the compressor is operated in a compression cycle Device; A heat exchange line installed in an evaporator of the absorption type device and having a cooling water circulated to exchange heat with latent heat of evaporation; A heat exchange line installed to bypass the first expansion valve and the second expansion valve in a bypass manner so that a part of the refrigerant vapor formed by heat exchange with the cooling water flowing through the heat exchange line is condensed; There is a technical feature in the combined heat and power generation system using the absorption and compression cycle configured to include a heat exchange line to be installed in the evaporator of the compressed device to use the cooling water heat exchanged with the latent heat of evaporation as cooling water.

In addition, the first heat exchanger is disposed between the drive source and the high temperature regenerator and connected so that the exhaust gas provided from the drive source is supplied through the exhaust gas supply line; It would be desirable to include a line for circulating a heat medium that transfers the arrangement of exhaust gases between the first heat exchanger and the hot regenerator.

Also, in the above, it would be desirable to apply power from the drive source to the compressor along the power line.

Hereinafter, with reference to the accompanying drawings will be described in detail the combined heat and power generation system using the absorption and compression cycle according to the present invention.

1 is a conceptual diagram showing the configuration of the combined heat and power generation system using the absorption and compression cycle according to the present invention.

As shown in the figure, a high temperature water jacket coolant line 14 and low temperature water connected between a drive source 10 (eg, a gas engine, a turbine, a fuel cell) and a first heat exchanger 12 that produce power and heat Cooling water is circulated through the jacket cooling water line 16 to cool the driving source 10, and the exhaust gas supply line 18 may supply exhaust gas provided from the driving source 10 to the first heat exchanger 12. ) Is connected.

The first heat exchanger 12 and the high temperature regenerator 20 of the absorbent device A are connected to each other via a line 22 so that a heat medium for transferring the exhaust gas array can be circulated. Looking at the components of the absorbent device (A) is composed of a high temperature regenerator 20, a condenser 24, an evaporator 26, an absorber 28.

An exhaust line 30 is formed in the high temperature regenerator 20 to discharge the exhaust gas, and a heat exchange line is formed in the condenser 24, the evaporator 26, and the absorber 28 to generate heat and heat exchange, respectively. 32, 34, 36 are provided. In particular, the heat exchange line 34 is heat-exchanged with the latent heat of evaporation in the evaporator 26 is installed to circulate the second heat exchanger (38).

In the absorption device A configured as described above, the flow for the absorption cycle and the sequence of operations are the same as those of the general absorption device and the absorption cycle, and thus are omitted.

On the other hand, in the compression device (B) consisting of the compressor 40, the condenser 42, the first expansion valve 44, the second expansion valve 46, the evaporator 48 and the first expansion valve 44 and On the line 50 connecting the second expansion valve 46, the second heat exchanger 38 may be heat exchanged by a cooling water flowing in the bypass heat exchange line 52 connected in a bypass form. Connected with

The compressor 40 of the compressed device B is connected via a power line 54 so as to be operated with the power provided from the drive source 10, and the evaporator 48 is heat exchanged to exchange heat with latent heat of evaporation. Line 56 is provided.

In the compression device B configured as described above, the flow for the compression cycle and the sequence of operations are the same as the flow of the general compression device and the compression cycle, and thus will be omitted.

A series of operating processes for the combined heat and power generation system using the absorption and compression cycle configured as described above will be described below.

As the driving source 10, which is configured in various ways, such as a gas engine, a turbine, and a fuel electric machine, is driven, power and high temperature exhaust gas are generated. At this time, some of the generated power is supplied to the customer, and some of the power is driven through the power line 54 to drive the compressor 40 of the compression device B to perform a series of operations for the compression cycle.

On the other hand, the exhaust gas is supplied to the first heat exchanger 12 through the exhaust gas supply line 18, and the heat medium, which is heat-exchanged with the arrangement of the exhaust gas to form a high temperature, is supplied to the high temperature regenerator 20 in the absorption cycle. Will perform a series of actions on the.

First, briefly looking at the absorption cycle of the absorption device (A), in the high temperature regenerator 20, the high temperature heat medium transferred by heat exchange from the first heat exchanger 12 heats the absorption liquid to separate the high temperature refrigerant vapor and the high concentration solution. The high temperature refrigerant vapor thus separated is supplied to the condenser 24.

The hot steam refrigerant supplied to the condenser 24 is condensed and converted into a low temperature liquid refrigerant and supplied to the evaporator 26.

The refrigerant vapor evaporated in the evaporator 26 is absorbed by the absorber 28, absorbed by the absorbed liquid concentrated in the high temperature regenerator 20, and then supplied to the high temperature regenerator 20.

The cooling water circulating in the heat exchange line 34 installed between the evaporator 26 and the second heat exchanger 38 of the absorbent device A during the absorption cycle as described above forms a low temperature. After latent heat and heat exchange, it comes out at 7 ℃.

On the other hand, briefly looking at the compression cycle of the compression device (B), as mentioned above, the refrigerant vapor to form a high temperature and high pressure while the compressor 40 is driven by some power provided from the drive source 10 is It is condensed through the condenser 42 and converted into a refrigerant liquid.

The refrigerant liquid passing through the condenser 42 is transferred to the second expansion valve 46 along the line 50 while passing through the first expansion valve 44, while passing through the first expansion valve 44. Some refrigerant vapor, which has been converted to steam, flows along the heat exchange line 52.

Thereby condensed through heat exchange to lose heat by the cooling water flowing into the heat exchange line 34 connected between the second heat exchanger 38 and the evaporator 26, the condensed refrigerant liquid flows along the line 50. Combined with the remaining refrigerant liquid and supplied to the second expansion valve 46.

The refrigerant liquid passing through the second expansion valve 46 is evaporated while being supplied to the evaporator 48. At this time, the refrigerant liquid exchanges heat with the cooling water circulating along the heat exchange line 56 in the evaporator 48 so that the cooling water has a low temperature. The low temperature cooling water exchanged as described above is supplied to the consumer to perform cooling.

2A and 2B, the above-described compression cycle, and the state thereof, are shown in the ph diagram, and the high temperature and high pressure refrigerant vapor b compressed through the compressor 40 passes through the condenser 42. While condensing to form the refrigerant liquid c.

The refrigerant liquid c is a heat exchanger through which the refrigerant vapor d partially formed while passing through the first expansion valve 44 circulates through the evaporator 26 and the second heat exchanger 38 of the absorption device A. It is condensed by the cooling water of the line 34 and converted into the refrigerant liquid e.

The converted refrigerant liquid e is combined with the remaining refrigerant liquid passing through the first expansion valve 44 to pass through the second expansion valve 46, and the refrigerant liquid f thus passed is evaporator 48. The temperature of the cooling water flowing into the heat exchange line 56 is rapidly lowered while entering the evaporation, so that cooling can be efficiently performed. After that, the refrigerant liquid a having passed through the evaporator 48 repeats the circulation process which is recovered to the compressor 40 again.

That is, as shown in the ph diagram, it can be seen that the freezing capacity in the compression cycle increases from q _e ′ to q _e . Therefore, efficient cooling can be performed.

Therefore, when using the combined heat and power generation system using the absorption and compression cycle according to the present invention, while generating power from one drive source (10), while using a portion of the power and the arrangement of the exhaust gas absorption apparatus (A) And it is possible to drive the compressed device (B) to operate as well as to supply power to the customer, it is possible to efficiently perform the cooling in the summer.

In addition, when using the combined heat and power generation system using the absorption and compression cycle according to the present invention, it is possible to perform the cooling in the summer as described above, but also to perform the heating by using the exhaust gas arrangement in the winter. have.

As described above, although the present invention has been described with reference to a limited embodiment and drawings, the present invention is not limited thereto, and it will be apparent that the present invention may be applied in various forms to perform cooling and heating. Furthermore, various modifications and variations can be made by those skilled in the art within the equivalent scope of the technical concept of the present invention and the claims to be described below.

Thus, the present invention is connected to the low temperature cold water circulating the evaporator in the absorption cycle, and the steam refrigerant, which is partially formed while passing through the condenser and expansion valve in the compression cycle can be heat exchanged with each other, provided in one drive source It is configured to operate the absorbent device and the compressed device by using a part of the power and the exhaust gas, and thus the refrigeration capacity and the coefficient of performance in the compressed cycle are increased, so that the effect of efficient cooling can be expected. .

In addition, using a combined heat and power generation system using absorption and compression cycles, the absorption and compression devices are produced using a portion of the power and the arrangement of exhaust gas while producing power for supplying the consumer from one driving source. It is possible to expect the effect of improving the energy use efficiency by efficiently operating the cooling in the summer in each operation.

In addition, the cooling performance is controlled by controlling the operation of the absorbent device, so that an effect of providing convenience in control and easy management can also be expected.

Claims (3)

A drive source 10 for providing exhaust gas and electric power; The absorber 28 and the condenser are connected to the driving source 10 so that the exhaust gas array provided from the driving source 10 is transferred to the high temperature regenerator 20, and the refrigerant vapor formed in the high temperature regenerator 20 is operated in an absorption cycle. An absorbent device (A) comprising 24);  Compressed device B comprising a condenser 42, first and second expansion valves 44 and 46 and an evaporator 48 such that the high temperature, high pressure gas refrigerant formed by the drive of the compressor 40 is operated in a compression cycle. ); A heat exchange line (34) installed in the evaporator (26) of the absorption type device (A), through which cooling water is circulated so as to exchange heat with latent heat of evaporation; The refrigerant vapor, which is partially formed, is bypassed to the line 50 to which the first expansion valve 44 and the second expansion valve 46 are connected so as to be condensed by heat exchange with the cooling water flowing through the heat exchange line 34. A heat exchange line 52 installed; Heat merge line using the absorption and compression cycle characterized in that it comprises a heat exchange line 56 is installed in the evaporator 48 of the compressed device (B) to use the cooling water heat exchanged with the latent heat of evaporation as cooling water Power generation system. The method of claim 1, A first heat exchanger (12) disposed between the drive source (10) and the high temperature regenerator (20) and connected to supply exhaust gas from the drive source (10) through an exhaust gas supply line (18); Heat merge using an absorbing and compressing cycle, characterized in that it comprises a line 22 for circulating a heat medium carrying an array of exhaust gases between the first heat exchanger 12 and the hot regenerator 20. Power generation system. The method of claim 1, Power generation system using absorption and compression cycle characterized in that the power provided from the drive source 10 is applied to the compressor (40) along the power line (54).

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