MIL-HDBK-1003/11
3.6.4
3.6.4.1 Cooling Medium. Record whether the cooling fluid is water or a
mixture including water and an additive. Specify the additive and provide
the mixture concentration in percent.
3.6.4.2 Cooling Water. Enter the flow rate of cooling water needed to cool
the engine in gallons per minute (gpm). Also record the leaving water
temperature and the temperature rise allowed for the engine. These
parameters may be obtained from the diesel engine manufacturer.
3.6.4.3 Heat Rejection. The diesel engine manufacturer can provide design
data concerning the rate of heat rejection from the engine jacket, lubricant
cooler and from the turbocharger aftercooler.
3.6.5
Generator Room.
3.6.5.1 Heat Radiated from the Engine and the Generator. The engine
manufacturer can supply the rate at which heat is radiated from the engine.
A value of 7 percent may be used until more refined information is
developed. Consider that most large generators have an efficiency of at
least 96 percent. Utilize a 4 percent value of the generator's kilowatt
rating converted to Btu's for the heat radiated from the generator. For
smaller units increase the percent as appropriate.
3.6.5.2 Design Ambient Temperatures. The outdoor design temperature for
ventilation of the generator room is found in NAVFAC P-89, Engineering
Weather Data. Refer to applicable criteria to determine the inside design
temperature and maximum allowable temperature rise. Outdoor dry and wet
bulb design temperatures will be required for the selection of cooling
towers and air conditioned spaces, and dry bulb temperatures for the
selection of radiator type engine cooling.
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