Asystem is to have a refrigeration effect of 4 kw. the evaporating and the condensing temperature are 20 °c and 35 °c respectively. because of departure of the carnot cycle, the theoretical cop equals 84% of (cop) carnot,

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature