11.32 Air conditioners are rated by their coefficient of performance at 78?F ins
ID: 1299708 • Letter: 1
Question
11.32
Air conditioners are rated by their coefficient of performance at 78?F inside temperature and 93?Foutside temperature. An efficient but realistic air conditioner has a coefficient of performance of 3.2.
Part A
What is the maximum possible coefficient of performance?
Express your answer using two significant figures.
Air conditioners are rated by their coefficient of performance at 78?F inside temperature and 93?Foutside temperature. An efficient but realistic air conditioner has a coefficient of performance of 3.2.
Part A
What is the maximum possible coefficient of performance?
Express your answer using two significant figures.
Explanation / Answer
Outside temperature
TC=(93-32)*(5/9)+273 =306.89 K
Inside temperature
TH=(78-32)*(5/9)+273=298.56 K
Coefficent of performance
COP=TH/(Tc-TH)=298.56/(306.89-298.56)
COP=35.82
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