Second Law of Thermodynamics A heat pump is used for cooling in summer and heating in the winter. The house is maintained at 240C year-round. The heat loss is 0.44 kW per degree difference between outside and inside temperature. The average outside temperature is 320C in the summer and -4 OC in the winter. Determine the power requirements for both heating and cooling. Ans. 1162 KW, 0.094 KW. A non-polluting power plant can be constructed using the temperature difference in the ocean. At the surface of the ocean in tropical climates, the average water temperature year-round is 30°C. At a depth of 305 m, the temperature is 4.5 °C. Determine the maximum thermal efficiency of such a power plant. Ans: (8.4%)

Second Law of Thermodynamics A heat pump is used for cooling in summer and heating in the winter. The house is maintained at 240C year-round. The heat loss is 0.44 kW per degree difference between outside and inside temperature. The average outside temperature is 320C in the summer and -4 OC in the winter. Determine the power requirements for both heating and cooling. Ans. 1162 KW, 0.094 KW. A non-polluting power plant can be constructed using the temperature difference in the ocean. At the surface of the ocean in tropical climates, the average water temperature year-round is 30°C. At a depth of 305 m, the temperature is 4.5 °C. Determine the maximum thermal efficiency of such a power plant. Ans: (8.4%)

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.19P

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