Assumptions
Biogas Composition
METHANE
55% Raw Biogas
98% Refined
CARBON DIOXIDE
40% Raw Biogas
< 2% Refined
HYDROGEN SULPHIDE (H2S)
1000 ppm Raw Biogas
< 10 ppm Refined
WATER VAPOUR
4% Raw Biogas
< 10 ppm Refined
NITROGEN (N2)
0% Raw Biogas
0% Refined
OXYGEN (O2)
0% Raw Biogas
0% Refined
Physical Constants & Conversion Factors
Raw Biogas Density
1.03
kg/m3
Methane Density
0.72
kg/m3
Temperature
40
Celsius
Pressure
1.01
kg/cm2
Biogas Yield
0.5
m3/kg TCVs
Commercial LPG Cylinder
19
kg/cylinder
Electricity Factor
3.8
kWh/m3 methane
Operating Days/yr
330
days/year

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