Fuel Consumption - GE 076080 Installation And Start-Up Manual

Fuel Consumption

Estimated fuel supply requirements for natural gas and LP
vapor fuels are shown here.
LP Vapor (Propane)
Cu Ft/Hr
Full Load
Gal/Hr (liquid)
Cu Ft/Hr
1/2 Load
Gal/Hr (liquid)
Cu Ft/Hr
Exercise
Gal/Hr (liquid)
Natural Gas
BTU / Hr
Full Load Cu Ft/ Hr
BTU / Hr
1/2 Load Cu Ft/ Hr
BTU / Hr
Exercise Cu Ft/ Hr
30 kW
BTU/Hr 436800
175
m³/Hr 5.0
4.9
BTU/Hr 287400
115
m³/Hr 3.3
3.2
BTU/Hr 138000
55
m³/Hr 1.6
1.5
30 kW
414500
415
m³/Hr 11.7
275400
275
m³/Hr 7.8
136200
136
m³/Hr 3.9
Fuel Pressure
Both LP vapor and natural gas fuel supply pressure at the
generator's fuel inlet port should be between 5 to 11 inches
(13 to 28 cm) of water (in. W.C.) at full load with all gas
appliances turned on and operating. Maximum pressure with
engine OFF at No Load is 13.85 in. W.C.
Power Loss
Air density is less at high altitudes, resulting in less available
engine power. Specifically, engine power will decrease 3%
for each 1,000 feet (300 m) above sea level and 1% for each
10° F (5.6°C) above 77°F (25°C). Generators located in these
conditions, that use power management technology must
have their transfer switch programmed appropriately for this
power decrease.
Fuel Pipe Sizing
There are numerous on-line or otherwise-published
references for fuel pipe sizing. For example, NFPA 54 -
National Fuel Gas Code, 2006 (Item #: 320-6031-06) is a
common resource. The installer should consider the specific
gravity of gas, compensate for a nominal amount of
restriction from bends and fittings, and refer to federal and
local codes for guidance.
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