What is the formula for calculating the efficiency of a heat engine?
Answers
the heat engine efficiency formula is given by
η = (Th − Tl / Th )
Where,
η = Heat Engine Efficiency
Th = Higher temperature
Tl = Lower temperature state
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Generally, we know that efficiency is capability. However, here the efficiency of a heat engine is the ratio of difference between the hot source and sink to the temperature of the hot source. It can also be termed as the thermal efficiency of the heat engine. The maximum efficiency of a heat engine is possible if there is a highest difference between hot and cold reservoirs. Efficiency does not have any unit.
The thermal efficiency may vary from one heat engine to another heat engine. To understand more about this, let's take the reliable heat engines and their efficiencies. The efficiencies of various heat engines are as follows:
It is just 3% efficient for ocean thermal energy conservation.
Automotive gasoline engines are nearly 25% efficient.
Similarly, coal-fired power stations have 49% efficiency.
It is around 60% efficient for the combined cycle gas turbine.
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