Refrigerant 134a is the working fluid in a vapor-compression heat pump that provides 35 kw to heat a dwelling on a day when the outside temperature is below freezing. Saturated vapor enters the compressor at 1.6 bar, and saturated liquid exits the condenser, which operates at 8 bar. Determine for an isentropic compressor efficiency of 85%: (a) the refrigerant mass flow rate, in kg's. (b) the magnitude of the compressor povwer, in kW. (c) the coefficient of performance.

Refrigerant 134a is the working fluid in a vapor-compression heat pump that provides 35 kw to heat a dwelling on a day when the outside temperature is below freezing. Saturated vapor enters the compressor at 1.6 bar, and saturated liquid exits the condenser, which operates at 8 bar. Determine for an isentropic compressor efficiency of 85%: (a) the refrigerant mass flow rate, in kg's. (b) the magnitude of the compressor povwer, in kW. (c) the coefficient of performance.

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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Refrigerant 134a is the working fluid in a vapor-compression heat pump that provides 35 kW to heat a dwelling on a day when the
outside temperature is below freezing. Saturated vapor enters the compressor at 1.6 bar, and saturated liquid exits the condenser,
which operates at 8 bar.
Determine for an isentropic compressor efficiency of 85%:
(a) the refrigerant mass flow rate, in kg/s.
(b) the magnitude of the compressor power, in kW.
() the coefficient of performance.

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