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J/J\text{J/J}

joule of heat per joule of electricity

Heat rateexact by definition

One joule of fuel heat for each joule of electricity sent out: the pure ratio of heat in to electricity out, which is the reciprocal of the thermal efficiency. A heat rate of 1 J/J is a plant that wastes nothing, equal to 3,600 kJ/kWh or 3,412.14 BTU/kWh, and a real plant has a larger number (2.5 J/J is 40 % efficient).

Watch out: Nothing in physics lets this number fall below 1. A value under 1 is not a plant but a mistake in the heat or in the electricity that was counted.

1 J/J\text{J/J} 3,600 kJ/kWh\text{kJ/kWh}

One joule of heat per joule of electricity in every heat rate unit

3,600kilojoule per kilowatt-hour (kJ/kWh)
3,600megajoule per megawatt-hour (MJ/MWh)
3,412.14BTU per kilowatt-hour (BTU/kWh)
3.41214million BTU per megawatt-hour (MMBTU/MWh)
1joule of heat per joule of electricity (J/J)this unit
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formula.expert. (n.d.). Joule of heat per joule of electricity (J/J): definition & conversion. https://formula.expert/units/joule-of-heat-per-joule-of-electricity