
25
Conversions of Centigrade and Fahrenheit
Water freezes at 0 ºC (32ºF) Water boils at 100 ºC (212ºF)
ºF= ( 1.8 x ºC ) + 32 ºC = 0.5555 ( ºF - 32 )
Fuel Consumption Formulas
FuelConsumption(US gal / hr)
Spec. Fuel Cons. (lb / BHP / hr) x BHP
FuelSpecific Weight(lb /US gal)
=
Specific FuelConsumption(lb / BHP / hr)
FuelCons.(US gal / hr) x FuelSpec. Wt(lb / US gal)
=
Specific FuelConsumption(kg / BHP / hr)
Spec.FuelCons.(lb / BHP / hr)
=
Electrical Motor Horsepower
Electrical Motor Horsepower =
kW Input x Motor Efficiency
0.746 x Generator Efficiency
Engine Horsepower Required =
kW Output Required
0.746 x Generator Efficiency
Piston Travel
Where L = Length of Stroke in Feet
N = Rotational Speed of Crankshaft in RPM
BREAK MEAN EFFECTIVE PRESSURE (BMEP) (4 Cycle)
BMEP =
792 ,000 x BHP
Total Displacement x RPM
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