Question

Унаслідок згоряння палива в тепловому двигуні виділилася кількість теплоти 4 МДж. Навколишньому середовищу передано кількість теплоти 1,4 МДж. Визначте ККД теплового двигуна

Answer 1

Ответ:

4МДж-1,4МДж= 2,6......

Answer 2

To calculate the thermal efficiency (ККД) of a heat engine, we need to use the formula:

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

In this case, the useful work output is the difference between the heat input and the heat transferred to the surroundings. The heat input is the amount of heat released during the combustion of fuel in the engine, which is 4 МДж. The heat transferred to the surroundings is 1.4 МДж.

Using the formula, we can calculate the thermal efficiency:

ККД = (4 МДж - 1.4 МДж) / 4 МДж

Calculating this expression gives us:

ККД = 2.6 МДж / 4 МДж

Simplifying the expression, we find:

ККД = 0.65

Therefore, the thermal efficiency of the heat engine is 0.65, or 65%.

Please note that the calculations provided are based on the information given in the question.