Environmental Engineering Reference
In-Depth Information
Table 3.2.
Components analysis of rice husk sample (source: Mahajan and Mishra 1992;
Grover 1989)
Parameter
Proportion (%)
Carbon
38.1
Hydrogen
4.7
Oxygen
29.3
Nitrogen
1.5
Sulphur
0.1
Moisture
8.9
Ash
17.4
Volatile matter
60.6
Fixed Carbon
19.9
3.2.3 Methodology
The methodology 'AMS-I.D. - Renewable electricity generation for a grid' was
applied. The methodology is approved by the United Nations Framework Conven-
tion on Climate Change for the small scale 'Clean Development Mechanism' pro-
jects (UN 2010). This category comprises renewable energy technologies that
supply electricity to an electricity distribution system that is or would have been
supplied by at least one fossil fuel or non-renewable biomass-fired generating unit.
Biomass based CHP systems supplying electricity to a grid are included in this
category. For CHP systems to qualify, the energy output should not exceed 45
MW
thermal
energy equivalents. The development is a rice husk based CHP project
for on-site use only. The project clearly qualifies the above category as only 38.44
MW
thermal
energy is produced:
24
*
1000
kg
kg
Boiler Capacity = 24 tph =
(3.1)
=
6
67
3600
s
s
Energy of steam = 3300 kJ/kg = 3.3 MJ/kg (at 45 kg cm
-2
pressure and (3.2)
440°C temperature)
Energy of water at 100 °C = 418 kJ/kg = 0.418 MJ/kg (3.3)
kg
MJ
Boiler rating =
(3.4)
6
67
*
(
−
0
418
)
=
19
.
22
MW
thermal
s
kg
2 Boilers were used =
2
*
19
.
22
MW
=
38
.
44
MW
(3.5)
thermal
thermal
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