Heat Chapters i4 and 15 Begin Date: 4/27/2017 12:00:00 AM Due Date: 5/6/2017 11:

Question

Heat Chapters i4 and 15 Begin Date: 4/27/2017 12:00:00 AM Due Date: 5/6/2017 11:00:00 PMEnd Date: 5/6/2017 11:00:00 PM (9%) Problem 10: Answer the following question about the coefficient of performance (COP) Randomized variables Tc 3.1 F Th 61 F What is the maximum coefficient of performance (COP) for a freezer that is set to maintain the cold space at -3.1 F, which is located in a kitchen that is maintained at 61° F? Grade Summary COP 4.21 Deductions 92% Potential sino cos0 tan0 7 8 9 HOME Submissions Attempts remaining: 3 cotano asino acos0 TA AN 4 5 6 (4% per attempt) detailed view atan0 acotano sinh0 cosh0 tanh0 cotanh END O BACKSPACE DEL CLEAR Degrees Radians Submit Hint I give up Hints: 2 deduction per hint. Hints remaining: 1 Feedback: 2% deduction per feedback.

Explanation / Answer

TC = -3.1 0F = -19.5 0C = 253.65 K

TH = 61 0F = 16.11 0C = 289.26 K

COP = TC/(TH-TC)

=> COP = 7.123

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