As máquinas primárias são aquelas que conseguem transformar calor em trabalho. Existem ciclos que descrevem esses funcionamentos, entre eles existem o Otto, Diesel e Carnot, sobre esses ciclos, descreva cada um deles e compare em termos de temperatura de trabalho, volme e pressão em seus funcionamentos.

answer:

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Explanation:

A Carnot heat engine receives heat from a reservoir at 900$^\circ{}$C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 27$^\circ{}$C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at -5$^\circ{}$C and transfers it to the same ambient air at 27$^\circ{}$C. Determine (a) the maximum rate of heat removal from the refrigerated space and (b) the total rate of heat rejection to the ambient air. Answers: (a) 4982 kJ/min, (b) 5782 kJ/min