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The vapour compression cycle below (Figure Q4) utilises the refrigerant R134a flowing at 0.05 kg s¹. Assuming that the compression is adiabatic and reversible. If the actual input power to the compressor is 2 kW, determine the following: a. The theoretical input power to the compressor and the heat transfer (4) to the evaporator. Take the enthalpies h₁, h₂, and h3 to be 238.41, 263.68 and 81.5 kJ kg-¹, respectively. b. The coefficient of performance (COP) based on your answer to (a). c. The compressors mechanical efficiency. d. The COP based on the actual power input. P@ 5.673 bar 3 T@ 15 °C 4 P@ 0.8071 bar T@ -35 °C Warm condenser Cold evaporator Dout in 2 P@5.673 bar T@ 50 °C Compressor 1 P @ 0.8071 bar T@ -20 °C

The vapour compression cycle below (Figure Q4) utilises the refrigerant R134a flowing at 0.05 kg s¹. Assuming that the compression is adiabatic and reversible. If the actual input power to the compressor is 2 kW, determine the following: a. The theoretical input power to the compressor and the heat transfer (4) to the evaporator. Take the enthalpies h₁, h₂, and h3 to be 238.41, 263.68 and 81.5 kJ kg-¹, respectively. b. The coefficient of performance (COP) based on your answer to (a). c. The compressors mechanical efficiency. d. The COP based on the actual power input. P@ 5.673 bar 3 T@ 15 °C 4 P@ 0.8071 bar T@ -35 °C Warm condenser Cold evaporator Dout in 2 P@5.673 bar T@ 50 °C Compressor 1 P @ 0.8071 bar T@ -20 °C

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
Problem 1.1MA
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The vapour compression cycle below (Figure Q4) utilises the refrigerant R134a flowing at 0.05 kg s¹. Assuming that the compression is adiabatic and reversible. If the actual input power to the compressor is 2 kW, determine the following: a. The theoretical input power to the compressor and the heat transfer (4) to the evaporator. Take the enthalpies h₁, h₂, and h3 to be 238.41, 263.68 and 81.5 kJ kg-¹, respectively. b. The coefficient of performance (COP) based on your answer to (a). c. The compressors mechanical efficiency. d. The COP based on the actual power input. P @ 5.673 bar 3 T @ 15 °C 4 P @ 0.8071 bar T@ -35 °C Warm condenser Cold evaporator Dout Din 2 P@ 5.673 bar T @ 50 °C Compressor 1 P@ 0.8071 bar T@ -20 °C
Transcribed Image Text:The vapour compression cycle below (Figure Q4) utilises the refrigerant R134a flowing at 0.05 kg s¹. Assuming that the compression is adiabatic and reversible. If the actual input power to the compressor is 2 kW, determine the following: a. The theoretical input power to the compressor and the heat transfer (4) to the evaporator. Take the enthalpies h₁, h₂, and h3 to be 238.41, 263.68 and 81.5 kJ kg-¹, respectively. b. The coefficient of performance (COP) based on your answer to (a). c. The compressors mechanical efficiency. d. The COP based on the actual power input. P @ 5.673 bar 3 T @ 15 °C 4 P @ 0.8071 bar T@ -35 °C Warm condenser Cold evaporator Dout Din 2 P@ 5.673 bar T @ 50 °C Compressor 1 P@ 0.8071 bar T@ -20 °C
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