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A heating system must maintain the interior of a building at 20°C during a period when the outside air temperature is 5°C and the heat transfer from the building through its roof and walls is 3 x 106 kJ. For this duty heat pumps are under consideration that would operate between the dwelling and a. the ground at 15°C. • b. a pond at 10°C. . c. the outside air at 5°C. For each case, evaluate the minimum theoretical net work input required by any such heat pump, in kj Answer: a. (Wcycle)min = a. (W cycle)min | a. (W cycle)min = kj kj kj

A heating system must maintain the interior of a building at 20°C during a period when the outside air temperature is 5°C and the heat transfer from the building through its roof and walls is 3 x 106 kJ. For this duty heat pumps are under consideration that would operate between the dwelling and a. the ground at 15°C. • b. a pond at 10°C. . c. the outside air at 5°C. For each case, evaluate the minimum theoretical net work input required by any such heat pump, in kj Answer: a. (Wcycle)min = a. (W cycle)min | a. (W cycle)min = kj kj kj

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A heating system must maintain the interior of a building at 20°C during a period when the outside air temperature is 5°C and the heat transfer from the building through its roof and walls is 3 x 106 kJ. For this duty heat pumps are under consideration that would operate between the dwelling and • a. the ground at 15°C. b. a pond at 10°C. • c. the outside air at 5°C. For each case, evaluate the minimum theoretical net work input required by any such heat pump, in kJ Answer: a. (W cycle)min =| a. (Wcycle)min = a. (W cycle)min = kj kj kj
Transcribed Image Text:A heating system must maintain the interior of a building at 20°C during a period when the outside air temperature is 5°C and the heat transfer from the building through its roof and walls is 3 x 106 kJ. For this duty heat pumps are under consideration that would operate between the dwelling and • a. the ground at 15°C. b. a pond at 10°C. • c. the outside air at 5°C. For each case, evaluate the minimum theoretical net work input required by any such heat pump, in kJ Answer: a. (W cycle)min =| a. (Wcycle)min = a. (W cycle)min = kj kj kj
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