How to Calculate Heat Rate of Generator Engine?

Types of Power Plant (Technology)

Natural Gas Based power plant technology

Diesel power plant technology

Heat Rate of Engine= Fuel Flow or Fuel burned * Fuel Heating Value / Power Output

1 Liter Diesel = 0.85 Kg

Example:

Heat Rate of Diesel Generator at 100% Load

Engine Model- 2506A-E15TAG2

Engine Capacity=400 eKW

Fuel Consumption=84 L = 71.4 Kg

Electrical Energy Output = 400 KW

Heating Value of Diesel = 42.5 MJ/Kg

Heat Rate of Engine= Fuel Flow or Fuel burned * Fuel Heating Value / Power Output

Heat Rate of Engine = 71.4 Kg * 42.5 MJ/Kg /400KW

Heat Rate of Engine =7.58 MJ/KWH

Heat Rate of Gas Generator at 100% Load

Engine Model- VHP5904LTD

Engine Capacity= 900 eKW

Fuel Consumption= 271 Nm³

Electrical Energy Output= 900 KW

Fuel Consumption= 0.28 Nm3/KWH

Heating Value of Natural Gas= 35.22 MJ/ Nm³

Heat Rate of Engine= Fuel Flow or Fuel burned * Fuel Heating Value / Power Output

= 271 Nm^{3 *}35.22 MJ/ Nm^{3 /} 900 KW

=10.60 MJ/KWH

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