Air conditioners sold in the United States are given a seasonal energy-efficienc

Question

Air conditioners sold in the United States are given a seasonal energy-efficiency ratio (SEER) rating that consumers can use to compare different models. A SEER rating is the ratio of heat pumped to energy input, similar to a COP but using English units, so a higher SEER rating means a more efficient model. You can determine the COP of an air conditioner by dividing the SEER rating by 3.4. For inside temperature 26 C and outside temperature 35 C when you'd be using air conditioning, estimate the theoretical maximum SEER rating of an air conditioner. (New air conditioners must have a SEER rating that exceeds 13, quite a bit less than the theoretical maximum, but there are practical issues that reduce efficiency. I have calculated: (273K + 26) / 12K = 24.91; 24.91 * 3.4 = 84.71 Mastering Physics says this answer is incorrect. Please help!!!

Explanation / Answer

Here ,

Hot temperature , Th = 35 degree C

Th = 308 K

cold temperature , Tc = 26 degree C

Tc = 299 K

COP = Tc/(Th - Tc)

Now , for the SEER rating

SEER rating = COP * 3.4

SEER rating = 299/(308 - 299) * 3.4

SEER rating = 112.96

the SEER rating on the Air conditioner is 112.96

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