A refrigeration plant works between the temperatures limits of -5°C and 25°C. The refrigerant is CO2 is wet at the entry to the compressor and has dryness fraction of 0.6. The refrigerator has actual COP 70% of the theoretical COP. If there is no under-cooling, determine the ice formed during a period of 24 hours from 20°C. The mass of CO2 circulated is 5kg/min. Take enthalpy of fusion of ice as 336 kJ/kg. The properties of CO2 are as follows:
A refrigeration plant works between the temperatures limits of -5°C and 25°C. The refrigerant is CO2 is wet at the entry to the compressor and has dryness fraction of 0.6. The refrigerator has actual COP 70% of the theoretical COP. If there is no under-cooling, determine the ice formed during a period of 24 hours from 20°C. The mass of CO2 circulated is 5kg/min. Take enthalpy of fusion of ice as 336 kJ/kg. The properties of CO2 are as follows:
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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A refrigeration plant works between the temperatures limits of -5°C and 25°C. The refrigerant is CO2 is wet at the entry to the compressor and has dryness fraction of 0.6. The refrigerator has actual COP 70% of the theoretical COP. If there is no under-cooling, determine the ice formed during a period of 24 hours from 20°C. The mass of CO2 circulated is 5kg/min. Take enthalpy of fusion of ice as 336 kJ/kg. The properties of CO2 are as follows:
Transcribed Image Text:Saturation temperature
(C°)
25
Specific enthalpy (kJ/kg)
hf
Specific entropy (kJ/kg-K)
hg
Sf
81.25
202.75
0.2513
-5
-7.53
238.5
-0.04187
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