Question

тепловая машина совершает за цикл 1 полезную работу 4 кДж, при этом передовая холодильнику 18 кДж тепловой энергии. Каков КПД тепловой машины?

Answer 1

Calculation of Efficiency (КПД) of a Heat Engine

To calculate the efficiency (КПД) of a heat engine, we can use the formula:

КПД = (Useful Work Output / Heat Input) x 100%

In this case, the heat engine performs 1 kJ of useful work per cycle and receives 18 kJ of thermal energy from the heat source (the hot side). Therefore, we can substitute these values into the formula:

КПД = (1 kJ / 18 kJ) x 100%

Simplifying the calculation:

КПД = 0.0556 x 100%

Therefore, the efficiency (КПД) of the heat engine is approximately 5.56%.

Please note that the calculation assumes no other losses or inefficiencies in the heat engine.