Eng-Tips is the largest engineering community on the Internet
Intelligent Work Forums for Engineering Professionals
-
Congratulations waross on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
Fuel consumption / efficiency for gas engine
- Thread starter eletest
- Start date
Would you accept Brake Specific Fuel Consumption in place of Thermal Efficiency?
For non diesel, non direct injection gas(oline) engines it is HIGHLY load and rpm dependent.
I'm guessing yours will likely look something like this -
The best/lowest BSFC is around .4 lbs/HP hr or .25g/kW hr but that is generally not attainable at max output.
For non diesel, non direct injection gas(oline) engines it is HIGHLY load and rpm dependent.
I'm guessing yours will likely look something like this -
The best/lowest BSFC is around .4 lbs/HP hr or .25g/kW hr but that is generally not attainable at max output.
What do you mean by a "gas engine"?
If you know what the brake power of an IC engine is, and what the fuel mass flow rate is at that operating point, you can calculate BTE or BSFC from the fuel's LHV. What is of concern is the engine's efficiency at converting chemical energy of the fuel to mechanical work. This can be expressed in whatever terms you like, including grams/kW-hr or lbs/hp-hr.
If you know what the brake power of an IC engine is, and what the fuel mass flow rate is at that operating point, you can calculate BTE or BSFC from the fuel's LHV. What is of concern is the engine's efficiency at converting chemical energy of the fuel to mechanical work. This can be expressed in whatever terms you like, including grams/kW-hr or lbs/hp-hr.
- Status
