Consider a two-stage cascade refrigeration system operating between -80 o C and 80 o C. Each stage operates on an ideal vapor-compression refrigeration cycle. Upper cycle use R-12 as working fluid, lower cycle use R-13. In the lower cycle refrigerant condenses at 0 o C, in the upper cycle refrigerant evaporates at -5 o C. If the mass flow rate in the lower cycle is 1 kg/s, determine the mass flow rate through the upper cycle.

Consider a two-stage cascade refrigeration system operating between -80 o C and 80 o C. Each stage operates on an ideal vapor-compression refrigeration cycle. Upper cycle use R-12 as working fluid, lower cycle use R-13. In the lower cycle refrigerant condenses at 0 o C, in the upper cycle refrigerant evaporates at -5 o C. If the mass flow rate in the lower cycle is 1 kg/s, determine the mass flow rate through the upper cycle.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 2RQ: The operating condition for the single compressor in a household refrigerator is the lowest box...

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