(7.) for each specified load test, compute the number of
continuous ours the generator set will operate on a full tank of
fuel. The following formula shall be used:
Operating Hours
=
Fuel Tank Capacity (Pounds)
Fuel Consumption (Pounds per Hour)
ALTERNATE PROCEDURE USING FLOWMETER.
Flowmeters may be used to determine the fuel rate. They usually are
calibrated in either gallons per hour, or pounds per hour, for a fuel of a
definite specific gravity and temperature.
(1.) After stabilization has occurred record the fuel consumption
rate, and continue to record the fuel consumption rate at one-half
hour intervals for 2 hours.
(2.) Determine the average of the readings (correct for fuel
specific gravity and temperature). This is the fuel consumption
rate and should be converted, if necessary, to pounds per hour.
(3.) Using the average value obtained above, calculate the rate
of fuel consumption per kilowatt hour.
(4.)
Repeat the test for each load condition specified.
(5.) Determine the capacity of the generator set fuel tank in
pounds of fuel.
(6.) For each specified load test, compute the number of
continuous hours the generator set will operate on a full tank of
fuel. The following formula shall be used:
Operating Hours
=
Fuel Tank Capacity (Pounds)
Fuel Consumption (Pounds per Hour)
c.
Results.
Compare the operating hours or the fuel consumption rate
per kWH.
3.5.12
Final Testing and Inspection
a.
Start the engine, record the starting time, make and record all
engine manufacturer's after-starting checks and inspections during
a reasonable warm-up period.
b.
Increase the load in steps no greater than the Maximum Step Load
Increase to 100% of Service Load, and operate the engine-generator
set for at least 30 minutes. Measure the vibration at the end
bearings (front and back of engine, outboard end of generator) in
the horizontal, vertical, and axial directions. Verify that the
vibration is within the same range as previous measurements and is
within the required range.
c.
Remove load and shut down the engine-generator set after the
recommended cool down period.
d.
Remove the lube oil filter and have the oil and filter examined by
the engine manufacturer for excessive metal, abrasive foreign
SECTION 16263A
Page 89
Previous Page
