Page 147 - Air and Gas Drilling Manual
P. 147
Chapter 4: Compressors 4-33
a) Surface location at sea level.
The prime mover has a maximum 300 horsepower available at 1,000 rpm at sea
level conditions. The actual shaft power needed by the three-stage rotary compressor
to produce the 240 psig maximum pressure output is 210.1 horsepower. Thus, the
percent load on the prime mover, or power ratio is
PR = 210 1 . (100 ) = 70 1.
300
Figure 4-17: Fuel consumption for gasoline, propane/butane, and diesel [3, 12].
Entering the abscissa of Figure 4-17 with the power ratio percent, the approximate
fuel consumption rate can be read on the ordinate using the diesel fuel curve. The
approximate fuel consumption rate at this power level is 0.540 lb/hp-hr. The total
weight of diesel fuel consumption per hour is
