Question: need done in 1 hour [a] A carnot engine is used to maintain the temperature of a refrigerator at - 5 C by removing heat

need done in 1 hour [a] A carnot engine is used to need done in 1 hour

[a] A carnot engine is used to maintain the temperature of a refrigerator at - 5 C by removing heat from it at a rate of 250 kJ/min. If the surrounding air is at 32 C, determine the minimum power input required for this refrigerator. What is the electricity cost to operate this engine for 30 days? Please sketch a diagram to illustrate the terms, including reservoirs temperature, efficiency, power input, you have used in your calculation. Given: n = 1 - (T/TH) and electricity tariff in Malaysia is 21.8 cent/kWh. [10 marks]

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