Enter the fuel consumption rate (grams per second) and the power produce by the engine (watts) into the calculator to determine the BSFC.
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BSFC Formula
The following formula is used to calculate brake-specific fuel consumption.
BSFC = r / P
- Where BSFC is the brake-specific fuel consuption ( g/J)
- r is the standard rate of fuel consumption (grams per second, g/s)
- P is the power output by the engine (watts, W)
BSFC Definition
What is BSFC?
BSFC, which is short for break-specific fuel consumption, is a measure of the fuel efficiency of any engine that burns fuel in order to produce a rotational movement and power.
Example Problem
How to calculate BSFC?
- First, determine the rate of fuel consumption of the engine.
In this example, the engine consumes a total of 2.75 grams of fuel per second.
- Next, determine the power output of the engine.
This engine is able to output 40 watts of energy.
- Finally, calculate the BSFC.
Using the formula, the break-specific fuel consumption is found to be:
BSFC = r / P
BSFC = 2.75/40
BSFC = r / P
BSFC = .06875 g/J
