Question

вычислите КПД тепловой машины,если холодильнику передано количество теплоты 60 кДж , а от нагревателя получено 100 кДж.

Answer 1

Ответ:

............................

Answer 2

Calculation of Thermal Efficiency (КПД) of a Heat Engine

To calculate the thermal efficiency (КПД) of a heat engine, we need to know the amount of heat transferred to the refrigerator (Qc) and the amount of heat received from the heater (Qh).

Given: - Amount of heat transferred to the refrigerator (Qc) = 60 kJ - Amount of heat received from the heater (Qh) = 100 kJ

The thermal efficiency (КПД) of a heat engine is defined as the ratio of the useful work output to the heat input. Mathematically, it can be expressed as:

КПД = (Useful work output) / (Heat input)

In this case, the useful work output is the difference between the heat received from the heater and the heat transferred to the refrigerator:

Useful work output = Qh - Qc

Substituting the given values:

Useful work output = 100 kJ - 60 kJ = 40 kJ

Now, we can calculate the thermal efficiency (КПД) using the formula:

КПД = (Useful work output) / (Heat input)

Substituting the values:

КПД = 40 kJ / 100 kJ = 0.4

Therefore, the thermal efficiency (КПД) of the heat engine is 0.4, or 40%.

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