Fuel Consumption; Fuel Pipe Sizing - Briggs & Stratton Home Generator System Manuel D'installation Et Démarrage

Fuel Consumption

See Figure 8 for fuel supply requirements at half and full
load for both natural gas and LP vapor.
Figure 8 — Fuel Supply Requirements
Model Natural Gas*
1/2
Load
1768-0 100.8
* = Natural Gas is in cubic feet per hour
** = LP Vapor is in gallons per hour/cubic feet per hour
Figure 9 — NATURAL GAS (NG) Pipe Size - Gas Flow Chart, in cubic feet per hour
NPT 10ft 15ft
½" 168 146
¾" 346 293
1" 653 549
Natural Gas (sg=0.65)
Figure 10 — LIQUEFIED PETROLEUM (LP) GAS Pipe Size - Gas Flow Chart, in cubic feet per hour
NPT 10ft 15ft
½" 110 96
¾" 277 192
1" 428 360
Liquefied Petroleum (LP) (sg=1.50)
Briggs & Stratton Power Products Home Generator System
Installation Manual
LP Vapor **
Full 1/2 Load Full Load
Load
177.9 1.16/42.21 2.15/78.24
20ft 30ft
115 93
240 192
446 360
Model 1768-0 requires 177.9 CFH at "Full Load"
20ft 30ft
76 61
158 126
293 236
Model 1768-0 requires 78.24 CFH at "Full Load"

Fuel Pipe Sizing

Figures 9 and 10 provide the maximum capacity of pipe in
cubic feet of gas per hour for gas pressures of 0.5 psi or
less and a pressure drop of 0.3 in. water column. Specific
gravity of gas is shown.This information is based on data
found in Chapter 9 of NFPA Publication 54.
Listed values 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 NFPA Publication 54.
40ft 50ft 60ft
79 70 63
163 145 132
307 274 250
40ft 50ft 60ft
52 46 42
107 95 87
202 180 164
9
70ft 80ft 90ft
59 55 51
120 113 106
230 211 197
70ft 80ft 90ft
38 36 33
79 74 69
151 139 129
100ft
48
99
187
100ft
32
65
123