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A refrigerator employs a heat pump which uses electric energy to remove heat and keep the inside cooler than its surroun
Posted: Mon May 16, 2022 4:29 pm
by answerhappygod
- A Refrigerator Employs A Heat Pump Which Uses Electric Energy To Remove Heat And Keep The Inside Cooler Than Its Surroun 1 (214.33 KiB) Viewed 29 times
A refrigerator employs a heat pump which uses electric energy to remove heat and keep the inside cooler than its surroundings. Suppose a refrigerator is kept at 4 °C and the room (including both the air and the walls) is kept at 22 °C. For this problem, model the refrigerator as a 1 mx1 mx1 m cube. A. What is the rate of heating due to conduction through the floor? Assume the refrigerator is insulated by a 6.3 cm-thick layer of polyurethane foam (k = 0.2 W/mK). B. The refrigerator is coated in a shiny low-emissivity (e=0.05) paint. What is the net rate of heating due to radiation from all 6 sides of the refrigerator? C. As the refrigerator employs the heat pump to cool, how does the entropy of your kitchen change? How does the entropy of the universe change? Explain your reasoning.