The BSFC Calculation (in Metric Units)
To calculate BSFC, use the formula
Where:
- r is the fuel consumption rate in grams per second (g/s)
- P is the power produced in watts where
- is the engine speed in radians per second (rad/s)
- is the engine torque in newton meters (N·m)
The above values of r, and may be readily measured by instrumentation with an engine mounted in a test stand and a load applied to the running engine. The resulting units of BSFC are grams per joule (g/J)
Commonly BSFC is expressed in units of grams per kilowatt-hour (g/(kW·h)). The conversion factor is as follows:
- BSFC = BSFC ×(3.6×106)
The conversion between metric and imperial units is:
- BSFC = BSFC ×608.277
- BSFC = BSFC ×0.001644
Read more about this topic: Brake Specific Fuel Consumption
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