$620-\%20$Test$\%20\%23\%202\%20-\%20$Practical$\%20$Part$\%20(15\%25)\%20(1).$pdf

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Question #$2(2\mathrm{.}5$ marks$)$

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An air conditioning system is used to maintain a house at a constant temperature of $20C.$ The house is gaining heat from the outdoors at a rate of $20,000(k\frac{J}{h}r),$ and the heat generated in the house from people, lights, and appliances amounts to $8000($kJ$/$hr$).$

A$)$ If the air conditioning system has a $COP{R}_R$ of $2\mathrm{.}5,$ determine the required power input to this air$-$conditioning system. $($Answer in kW $)$

B$)$ If the outside temperature is $45C,$ what is the theoretical maximum $CO{P}_R$ that could be achieved?