An engine has an input temperature of 653 K and an exhaust temperature of 312 K. determine the efficiency of the engine

Efficiency is the measure of how efficient a process is. It is used to assess the ability of a process in avoiding waste energy, materials, money and time in doing a desirable output. It is calculated as:

Efficiency = 1 - (Tc/Th)

Efficiency = 1 - (312 K / 653 K)

Efficiency = 0.52