Calorific Value of Fuel Using Junker S Gas Calorimeter
Calorific Value of Fuel Using Junker S Gas Calorimeter
Calorific Value of Fuel Using Junker S Gas Calorimeter
CALORIFIC VALUE OF
FUELS
It is defined as the heat liberated in kJ by
141900
33900
Butane
49200
11800
Diesel
45000
10700
Anthracite
27000
7800
Wood
15000
3600
Natural Gas
54000
13000
TYPES OF CALORIFIC
VALUES
Higher Calorific Value: It is the total heat
COMPARISON OF HCV
AND LCV
Here is a comparison of HCV and LCV of some
fuels.
FUEL
HCV (MJ/kg)
HCV (kj/mol)
LCV (MJ/kg)
Hydrogen
141.80
286.00
121.00
Butane
49.50
20900
45.75
Gasoline
47.30
44.40
Propane
50.35
2220
46.35
Anthracite
2700
Kerosene
46.20
43.00
Paraffin
46.00
41.50
APPARATUS
The apparatus mainly consists of a
cylindrical shell with copper coil arranged in
two pass configuration with water inlet and
outlet to circulate through the copper coil, a
pressure regulator, a wet type gas flow meter
& a gas Bunsen burner, temperature sensors
for measuring inlet, outlet water temperature,
and for flue gas temperature and a
measuringjar.
WORKING
PRINCIPLE
This Gas Calorimeter works on the Junker's
principle of burning of a known volume of gas
and imparting the heat with maximum
efficiency to steadily flowing water and finding
out of the rise in temperature of a measured
volume of water.
The formula, Calorific Value of Gas X Volume
of Gas = Volume of water X Rise in
Temperature, is then used to determine the
Calorific Value of the Gas (assuming that heat
capacity of water is unity).
DETERMINATION OF CALORIFIC
VALUE
This Calorimeter covers a wide range between
PROCEDURE(Contd.)
The gas source is connected to the pressure
PROCEDURE(Contd.)
The outlet is let into a 1000mL flask and
FORMULA TO BE USED
CVg=( Vw x w x CPw x T ) / Vg x g
where
w is the density of water
Vw is the volume of water collected in
litres
CPw is the specific heat of water
T is the change in temp. of water
Vg is the volume of gas burnt in litres
g is the density of the gas burnt
APPLICATIONS
Petroleum Industries
Coke Oven Batteries
Thermal Power Houses
Cement Industries
Fuel Gas Producers & Consumers
Steel Plants
Fertilizer Units