6.107 Figure P6.107 provides the schematic of a heat pump using Refrigerant 134a as the working fluid, together with steady-state data at key points. The mass flow rate of the refrigerant is 7 kg/min, and the power input to the compressor is 5.17 kW. (a) Determine the co- efficient of performance for the heat pump. (b) If the valve were re- placed by a turbine, power could be produced, thereby reducing the power requirement of the heat pump system. Would you recommend this power-saving measure? Explain. Qour She Saturated liquid P2 = P3 = 9 bar T = 60°C Condenser W - 5.17 kW Expansion Compressor valve Evaporator m= 7 kg/min P1 =P4 =2.4 bar

6.107 Figure P6.107 provides the schematic of a heat pump using Refrigerant 134a as the working fluid, together with steady-state data at key points. The mass flow rate of the refrigerant is 7 kg/min, and the power input to the compressor is 5.17 kW. (a) Determine the co- efficient of performance for the heat pump. (b) If the valve were re- placed by a turbine, power could be produced, thereby reducing the power requirement of the heat pump system. Would you recommend this power-saving measure? Explain. Qour She Saturated liquid P2 = P3 = 9 bar T = 60°C Condenser W - 5.17 kW Expansion Compressor valve Evaporator m= 7 kg/min P1 =P4 =2.4 bar

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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Question

6.107 Figure P6.107 provides the schematic of a heat pump using
Refrigerant 134a as the working fluid, together with steady-state data
at key points. The mass flow rate of the refrigerant is 7 kg/min, and
the power input to the compressor is 5.17 kW. (a) Determine the co-
efficient of performance for the heat pump. (b) If the valve were re-
placed by a turbine, power could be produced, thereby reducing the
power requirement of the heat pump system. Would you recommend
this power-saving measure? Explain.
She
P2 = P3 = 9 bar
Tz = 60°C
Saturated
liquid
Condenser
Expansion
W = 5.17 kW
Compressor
valve
Evaporator
m= 7 kg/min
P1 =P4 = 2.4 bar
FIGURE P6.107

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