A geothermal heat pump running a simple heat pump cycle uses R-134a as the refrigerant and sources thermal energy from well water. The well water enters the evaporator at 13°C and exits at 7°C, with negligible pressure drop. On the refrigerant side, the evaporator operates isobarically at 320 kPa and the refrigerant exits the evaporator at 10°C. The refrigerant is compressed to 1200 kPa through the compressor, which has an isentropic efficiency of 90%. In the condenser, air absorbs energy from the refrigerant at a rate of 4.5 tons (1 ton = 211 kJ/min) as its temperature increases from 22°C at the condenser inlet to 42°C at the condenser outlet. The condenser operates isobarically, and the refrigerant exits the condenser at 20°C. Calculate the input power to the compressor and the COP of the heat pump.

A geothermal heat pump running a simple heat pump cycle uses R-134a as the refrigerant and sources thermal energy from well water. The well water enters the evaporator at 13°C and exits at 7°C, with negligible pressure drop. On the refrigerant side, the evaporator operates isobarically at 320 kPa and the refrigerant exits the evaporator at 10°C. The refrigerant is compressed to 1200 kPa through the compressor, which has an isentropic efficiency of 90%. In the condenser, air absorbs energy from the refrigerant at a rate of 4.5 tons (1 ton = 211 kJ/min) as its temperature increases from 22°C at the condenser inlet to 42°C at the condenser outlet. The condenser operates isobarically, and the refrigerant exits the condenser at 20°C. Calculate the input power to the compressor and the COP of the heat pump.

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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