Fuel Consumption - Briggs & Stratton 45000 series Installation And Start-Up Manual

When the initial test runs are completed, the manometer
is removed and the port is plugged. A typical final fuel
connection assembly is shown here, where (A) is the fuel
supply and (B) goes to the home generator.
A
Fuel Pipe Sizing
There are numerous on-line or otherwise-published
references for fuel pipe sizing. The installer should consider
the specific gravity of gas and compensate for a nominal
amount of restriction from bends, fittings, etc. If an unusual
number of fittings, bends, or other restrictions are used,
please refer to federal and local codes.
12
B

Fuel Consumption

Estimated fuel supply requirements at half and full load for
natural gas and LP vapor fuels are shown below.
Natural Gas
1/2 Load Full Load
45kW 483 C 777 C
483,000 B 777,000 B 445,000 B 742,000 B
C = Cubic feet per hour
B = BTU's per hour
Physical Properties
Normal Atmospheric State
Boiling Point (in °F):
Initial
End
Heating Value:
BTU per gallon (Net LHV*)
BTU per gallon (gross**)
Cubic feet (gas)
Density***
Weight†
Octane Number:
Research
Motor
* LHV (Low Heat Value) is the more realistic rating.
** Gross heat value does not consider heat lost in the form of water
during combustion.
*** Density is given in "Cubic Feet of Gas per Gallon of Liquid".
† Weight is given in "Pounds per Gallon of Liquid".
LP Vapor
1/2 Load Full Load
178 C 297 C
LP Vapor Natural
Gas
Gas Gas
-44 -259
-44 -259
83,340 63,310
91,547
2,500 1,000
36.39 57.75
4.24 2.65
110+ 110+
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