Fuel Consumption; Natural Gas; Fuel Pressure; Power Loss - Briggs & Stratton 076180 Manual De Instalación Y Arranque

Fuel Consumption

Estimated fuel supply requirements for natural gas and LP
vapor fuels are shown here.
LP Vapor (Propane)
BTU/Hr
Cu Ft/Hr
Full Load
Gal/Hr (liquid)
BTU/Hr
Cu Ft/Hr
1/2 Load
Gal/Hr (liquid)
BTU/Hr
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
25 kW
387000
155
m³/Hr 4.4
4.3
262500
105
m³/Hr 3.0
2.9
138000
55
m³/Hr 1.6
1.5
25 kW
368100
368
m³/Hr 10.4
252200
252
m³/Hr 7.1
136200
136
m³/Hr 3.9
Recommended Energy
Content of Fuel
Heating Value:
BTU per gallon (gross**)
Cubic feet (gas)

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.
LP Vapor Natural
Gas
91,547
2,500 1,000
21