A heat pump is operating between a low temperature reservoir of 270 K and a high temperaturereservoir of 340 K. The heat pump receives heat at 255 K from the low temperature reservoir andrejects heat at 355 K to the high temperature reservoir. The heating coefficient of performance ofthe heat pump is 3.2. The heat transfer rate from the low temperature reservoir is 30 kW. The deadstate temperature is 270 K. Determine,a. Power input to the heat pump (kW)b. Heat transfer rate to the high-temperature reservoir (kW)c. Exergy destruction rate associated with the low temperature heat transfer (kW)d. Exergy destruction rate of the heat pump (kW)e. Exergy destruction rate associated with the high temperature heat transfer (kW)f. Exergetic efficiency of the heat pump itself

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter45: Domestic Refrigerators And Freezers
Section: Chapter Questions
Problem 12RQ: Refrigerators currently being manufactured in the United States are using______as their refrigerant.
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A heat pump is operating between a low temperature reservoir of 270 K and a high temperature
reservoir of 340 K. The heat pump receives heat at 255 K from the low temperature reservoir and
rejects heat at 355 K to the high temperature reservoir. The heating coefficient of performance of
the heat pump is 3.2. The heat transfer rate from the low temperature reservoir is 30 kW. The dead
state temperature is 270 K. Determine,
a. Power input to the heat pump (kW)
b. Heat transfer rate to the high-temperature reservoir (kW)
c. Exergy destruction rate associated with the low temperature heat transfer (kW)
d. Exergy destruction rate of the heat pump (kW)
e. Exergy destruction rate associated with the high temperature heat transfer (kW)
f. Exergetic efficiency of the heat pump itself

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