4. An ideal vapor-compression heat pump cycle with Refrigerant 134a as the working fluid provides 15 kW to maintain a building at 200°C when the outside temperature is 50°C. Saturated vapor at 2.4 bar leaves the evaporator, and saturated liquid at 8 bar leaves the condenser. Calculate (a) The power input to the compressor, in kW (b) The coefficient of performance. (c) The coefficient of performance of a reversible heat pump cycle operating between thermal reservoirs at 20 and 50°C. (h, = 244.09kJ/kg, s, = 0.9222 kJ/kg - K; h2 = 268.97 kJ/ kg; h, = 93.42 kJ/ kg)
4. An ideal vapor-compression heat pump cycle with Refrigerant 134a as the working fluid provides 15 kW to maintain a building at 200°C when the outside temperature is 50°C. Saturated vapor at 2.4 bar leaves the evaporator, and saturated liquid at 8 bar leaves the condenser. Calculate (a) The power input to the compressor, in kW (b) The coefficient of performance. (c) The coefficient of performance of a reversible heat pump cycle operating between thermal reservoirs at 20 and 50°C. (h, = 244.09kJ/kg, s, = 0.9222 kJ/kg - K; h2 = 268.97 kJ/ kg; h, = 93.42 kJ/ kg)
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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An ideal vapor-compression heat pump cycle with Refrigerant 134a as the working fluid provides
15 kW to maintain a building at 200°C when the outside temperature is 50°C. Saturated vapor at 2.4 bar leaves the evaporator, and saturated liquid at 8 bar leaves the condenser. Calculate (a) The power input to the compressor, in kW (b) The coefficient of performance. (c) The coefficient of performance of a reversible heat pump cycle operating between thermal reservoirs at 20 and 50°C. (h, = 244.09kJ/ke, 5 = 0.9222 kJ/kg -K; h, = 268.97 kJ/ kg; h, = 93.42 kJ/ kg)
Transcribed Image Text:4. An ideal vapor-compression heat pump cycle with Refrigerant 134a as the working fluid provides
15 kW to maintain a building at 200°C when the outside temperature is 50°C. Saturated vapor at
2.4 bar leaves the evaporator, and saturated liquid at 8 bar leaves the condenser. Calculate (a)
The power input to the compressor, in kW (b) The coefficient of performance. (c) The coefficient
of performance of a reversible heat pump cycle operating between thermal reservoirs at 20 and
50°C. (h, = 244.09kJ/kg, s, = 0.9222 kJ/kg – K; h2 = 268.97 kl/ kg; h, = 93.42 kl/ kg)
%3D
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