A vapour compression refrigerator circulates 4.5 kg of NH3 per hour. Condensation take place at 30°C and evaporation at – 15°C. There is no under-cooling of the refrigerant. The temperature after isentropic compression is 75°C and specific heat of superheated vapour is 2.82 kJ/kg K. Determine : (i) Co-efficient of performance. (ii) Ice produced in kg per hour in the evaporator from water at 20°C and ice at 0°C. Take : Enthalpy of fusion of ice = 336 kJ/kg, specific heat of water = 4.187 kJ/kg. (iii) The effective swept volume of the compressor in m3 /min
A vapour compression refrigerator circulates 4.5 kg of NH3 per hour. Condensation take place at 30°C and evaporation at – 15°C. There is no under-cooling of the refrigerant. The temperature after isentropic compression is 75°C and specific heat of superheated vapour is 2.82 kJ/kg K. Determine : (i) Co-efficient of performance. (ii) Ice produced in kg per hour in the evaporator from water at 20°C and ice at 0°C. Take : Enthalpy of fusion of ice = 336 kJ/kg, specific heat of water = 4.187 kJ/kg. (iii) The effective swept volume of the compressor in m3 /min
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 vapour compression refrigerator circulates 4.5 kg of NH3 per hour. Condensation take place at 30°C and
evaporation at – 15°C. There is no under-cooling of the refrigerant. The temperature after isentropic
compression is 75°C and specific heat of superheated vapour is 2.82 kJ/kg K. Determine :
(i) Co-efficient of performance.
(ii) Ice produced in kg per hour in the evaporator from water at 20°C and ice at 0°C. Take : Enthalpy of
fusion of ice = 336 kJ/kg, specific heat of water = 4.187 kJ/kg.
(iii) The effective swept volume of the compressor in m3
/min.
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