A two stage cascade refrigeration system uses R-12 in the high pressure loop with a condenser temperature of 300C and -100C in the cascade condenser, and R-22 in the low pressure loop with a temperature in the cascade condenser of 00C and an evaporator temperature of -30 0C. The refrigeration load is 28 tons.h6 = 366 kJ/kg; h2= 421 kJ/kgDetermine the ff:a.) the mass flow rate in the low pressure loop,ANSWER: 0.5097287949549 kg/sb.) the mass flow rate in the high pressure loop,ANSWER: 0.94987995754451 kg/sc.) total power requirementANSWER: 32.1224 KW

Solution: Given Data: T = 28 tons

Answered: A two stage cascade refrigeration…

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 two stage cascade refrigeration system uses R-12 in the high pressure loop with a condenser temperature of 30⁰C and -10⁰C in the cascade condenser, and R-22 in the low pressure loop with a temperature in the cascade condenser of 0⁰C and an evaporator temperature of -30 ⁰C. The refrigeration load is 28 tons.

h6 = 366 kJ/kg; h2= 421 kJ/kg

Determine the ff:
a.) the mass flow rate in the low pressure loop,
ANSWER: 0.5097287949549 kg/s

b.) the mass flow rate in the high pressure loop,
ANSWER: 0.94987995754451 kg/s

c.) total power requirement
ANSWER: 32.1224 KW

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