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Avapor-compression heat pump has a heating capacity of 500 kl/min and uses Refrigerant 134a asthe workingfluid. The isentropic compressor efficiency is 75%. The heat pump isdriven by a power cyclewith a thermal efficiency of 25%. Forthe power cycle, 80% of the heat rejected istransferred to the heated space. Data for thecycle are provided in thetable below. The principal states are numbered as in the figure below. Condenser Expansion valve Compressor Evaporator Saturated or superheated vapor 5 State (baг) (°C) (k/kg) (kJ/kg -K) 1 4.145 10 252.9 0.9141 25 10 42.02 271 0.9141 2 10 47.26 277.1 0.9331 3 9.6 34 97.31 0.3584 4 4.145 10 97.31 0.3645 (a) Determinethe power input to the heat pump compressor, in kW. (b) Evaluate theratio of the total ratethat heat is delivered to the heated spaceto the rateof heat inputto the power cycle.

Avapor-compression heat pump has a heating capacity of 500 kl/min and uses Refrigerant 134a asthe workingfluid. The isentropic compressor efficiency is 75%. The heat pump isdriven by a power cyclewith a thermal efficiency of 25%. Forthe power cycle, 80% of the heat rejected istransferred to the heated space. Data for thecycle are provided in thetable below. The principal states are numbered as in the figure below. Condenser Expansion valve Compressor Evaporator Saturated or superheated vapor 5 State (baг) (°C) (k/kg) (kJ/kg -K) 1 4.145 10 252.9 0.9141 25 10 42.02 271 0.9141 2 10 47.26 277.1 0.9331 3 9.6 34 97.31 0.3584 4 4.145 10 97.31 0.3645 (a) Determinethe power input to the heat pump compressor, in kW. (b) Evaluate theratio of the total ratethat heat is delivered to the heated spaceto the rateof heat inputto the power cycle.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Question 3 of 4 < > - / 25 View Policies Current Attempt in Progress Avapor-compression heat pump has a heatingcapacity of 500 kl/min and uses Refrigerant 134a asthe working fluid. The isentropic compressorefficiency is 75%. The heat pump isdriven by a power cyclewith a thermal efficiencyof 25%. Forthe powercycle, 80% of the heat rejected is transferred to the heated space. Data for thecycle are provided in the table below. The principal states are numbered as in the figure below. Condenser Expansion valve Compressor Evaporator Saturated or superheated vapor State (bar) (°C) (kJ/ke) (kJ/kg -K) 1 4.145 10 252.9 0.9141 25 10 42.02 271 0.9141 2 10 47.26 277.1 0.9331 3 9.6 34 97.31 0.3584 4 4.145 10 97.31 0.3645 (a) Determinethe power inputto the heat pump compressor, in kW. (b) Evaluatetheratio of thetotal ratethat heat is delivered to the heated spaceto therateof heat inputto the power cycle.
Transcribed Image Text:Question 3 of 4 < > - / 25 View Policies Current Attempt in Progress Avapor-compression heat pump has a heatingcapacity of 500 kl/min and uses Refrigerant 134a asthe working fluid. The isentropic compressorefficiency is 75%. The heat pump isdriven by a power cyclewith a thermal efficiencyof 25%. Forthe powercycle, 80% of the heat rejected is transferred to the heated space. Data for thecycle are provided in the table below. The principal states are numbered as in the figure below. Condenser Expansion valve Compressor Evaporator Saturated or superheated vapor State (bar) (°C) (kJ/ke) (kJ/kg -K) 1 4.145 10 252.9 0.9141 25 10 42.02 271 0.9141 2 10 47.26 277.1 0.9331 3 9.6 34 97.31 0.3584 4 4.145 10 97.31 0.3645 (a) Determinethe power inputto the heat pump compressor, in kW. (b) Evaluatetheratio of thetotal ratethat heat is delivered to the heated spaceto therateof heat inputto the power cycle.
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