Solution Found!
Solved: Calculate the amount of work input a refrigerator
Chapter 5, Problem 131EUP(choose chapter or problem)
Problem 131EUP
Calculate the amount of work input a refrigerator needs to make ice cubes out of a tray of 0.5 lbm liquid water at 50 F. Assume the refrigerator has β = 3.5 and a motor-compressor of 750 W. How much time does it take if this is the only cooling load?
Questions & Answers
QUESTION:
Problem 131EUP
Calculate the amount of work input a refrigerator needs to make ice cubes out of a tray of 0.5 lbm liquid water at 50 F. Assume the refrigerator has β = 3.5 and a motor-compressor of 750 W. How much time does it take if this is the only cooling load?
ANSWER:
Solution 131 EUP
Step 1 of 4
We have to calculate the amount of work input a refrigerator needs to make ice cubes out of a tray of 0.5 lbm liquid water at 50 F and the time taken by the refrigerator to make ice cubes.
The amount of work input a refrigerator needs can be calculated using the expression for
COP of refrigerator.
Where,
Work input to the refrigerator in Btu
heat loss by the refrigerator in Btu