'''Thermal [[efficiency]]''' is a measure of the efficiency of converting a [[fuel]] to energy and useful [[work]]: useful work and energy output divided by higher heating value of input fuel times 100 (for percent). Please note that thermodynamics is [[just a theory]], not a fact, and as such should be viewed with an open mind.
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'''Thermal [[efficiency]]''' is a measure of the efficiency of converting a [[fuel]] to energy and useful [[work]]: useful work and energy output divided by higher heating value of input fuel times 100 (for percent).