A two-stage cascade refrigeration system is to provide cooling at -40C while operating the high-temperature condenser...

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A two-stage cascade refrigeration system is to provide cooling at -40°C while operating the high-temperature condenser at 1.6 MPa. Each stage operates on the ideal vapor-compression refrigeration cycle. The upper vapor compression refrigeration system uses water as its working fluid and operates its evaporator at 5°C. The lower cycle uses refrigerant-134a as the working fluid and operates its condenser at 400 kPa. This system creates a cooling effect of 20 kJ/s. Sketch the 7-s diagram for this system and determine the mass flow rate of R-134a and water in their respective cycles and the overall COP of this cascade system. A two-stage cascade refrigeration system is to provide cooling at -40°C while operating the high-temperature condenser at 1.6 MPa. Each stage operates on the ideal vapor-compression refrigeration cycle. The upper vapor compression refrigeration system uses water as its working fluid and operates its evaporator at 5°C. The lower cycle uses refrigerant-134a as the working fluid and operates its condenser at 400 kPa. This system creates a cooling effect of 20 kJ/s. Sketch the 7-s diagram for this system and determine the mass flow rate of R-134a and water in their respective cycles and the overall COP of this cascade system.

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Sketching the 7s diagram and analysis Sevens diagram We have two separate cyclesso we need two separ... View the full answer