mercury.
**************************************************************************
NOTE: Use the following tables and subparagraphs
for natural gas fueled engines.
**************************************************************************
SIZE RANGE
PERCENT OF RATED
FUEL USAGE
NET kW
FULL LOAD
kJ/kWh
100
-
299
75
-
100
12,340
300
-
999
75
-
100
11,325
1,000
-
2,500
75
-
100
11,325
SIZE RANGE
PERCENT OF RATED
FUEL USAGE
NET kW
FULL LOAD
btu/bhp-hr
100
-
299
75
-
100
8,700
300
-
999
75
-
100
8,000
1,000
-
2,500
75
-
100
8,000
Conditions:
a.
Based on 118 octane natural gas with a heat value of 33,500 kj/m3
900 btu/ft3.
b.
Sea level operation.
c.
25 deg C 77 deg F ambient air temperature at 30 percent relative
humidity.
d.
100 kPa 29.53 inch of mercury barometer pressure.
2.2.2
Crankcase Pressure Relief Valve
**************************************************************************
NOTES: Engines larger than 20 kW (27 hp) shall
utilize a pressure relief valve on the crankcase to
relieve primary crankcase explosions. The crankcase
pressure relief valve vents quickly and then reseats
to prevent return of air and to protect against
secondary explosions. The plans should show the
crankcase pressure relief valve vent piping on
indoor engine installations.
Use the first paragraph for diesel engines and the
second paragraph for natural gas fueled engines.
**************************************************************************
[A pressure relief valve shall be provided in the crankcase. The crankcase
shall be vented in accordance with the manufacturer's recommendations,
except the engine exhaust shall not be used as the venting system.
Crankcase breathers, if provided on engines installed in either a building
or enclosure, shall be piped to vent to the outside. If the engine is
located outside, the crankcase breather shall be fitted with a goose-neck
to prevent rain entry.]
[A pressure relief valve shall be provided in the crankcase. The crankcase
shall be vented in accordance with the manufacturer's recommendations.
SECTION 15133A
Page 18
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