A Carnot heat engine is used to drive a heat pump. The heat engine takes waste energy as a heat source at 77°C and rejects the heat at 15°C ambient temperature. The heat pump delivers the heat at 47°C and receives it from the ambient. If the waste energy is 28800 kJ/hr, find the total rate of energy rejected by the heat pump and the heat engine. A Carnot refrigeration cycle absorbs heat at -3°C and rejects heat at 27°C, Calculate the coefficient of performance of this refrigeration cycle. If the cycle is absorbing 1130 kJ/min, determine the power required. Assume a Carnot heat pump operates between the same temperatures as the above refrigeration cycle, what is the coefficient of performance and how many heat will the heat pump deliver.
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Adi S.
A Carnot refrigeration cycle absorbs heat at -3°C and rejects heat at 27°C. Calculate the coefficient of performance of this refrigeration cycle. If the cycle is absorbing 1130 kJ/min, determine the power required. Assume a Carnot heat pump operates between the same temperatures as the above refrigeration cycle, what is the coefficient of performance and how much heat will the heat pump deliver.
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A Carnot heat engine receives heat at $900 \mathrm{K}$ and rejects the waste heat to the environment at $300 \mathrm{K}$. The entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the cooled space at $-15^{\circ} \mathrm{C}$ at a rate of $250 \mathrm{kJ} / \mathrm{min}$ and rejects it to the same environment at 300 K. Determine ( $a$ ) the rate of heat supplied to the heat engine and $(b)$ the total rate of heat rejection to the environment.
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