14
Fuel Consumption
Estimated fuel supply requirements at half and full load for
natural gas and LP vapor fuels are shown here.
15kW
Natural Gas LP Vapor
1/2 Load Full Load 1/2 Load Full Load
126 C 242 C 56 C 108 C
126,000 B 242,000 B 140,000 B 270,000 B
C = Cubic feet per hour
B = BTU’s per hour
20kW
Natural Gas LP Vapor
1/2 Load Full Load 1/2 Load Full Load
160 C 293C 70.4 C 141.5 C
160,000 B 293,000B 176,725 B 353,650 B
C = Cubic feet per hour
B = BTU’s per hour
Physical
Properties
LP Vapor Natural
Gas
Normal Atmospheric
State
Gas Gas
Boiling Point (in °F):
Initial
End
-44
-44
-259
-259
Heating Value:
BTU per gallon (Net
LHV*)
BTU per gallon (gross**)
Cubic feet (gas)
83,340
91,547
2,500
63,310
1,000
Density*** 36.39 57.75
Weight† 4.24 2.65
Octane Number:
Research
Motor
110+
97
110+
* LHV (Low Heat Value) is the more realistic rating.
** Gross heat value does not consider heat lost in the form of water during
combustion.
*** Densityisgivenin“CubicFeetofGasperGallonofLiquid”.
† Weightisgivenin“PoundsperGallonofLiquid”.