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 24 tons. Given : h6 = 368 kJ/kg; h2= 420 kJ/kgDetermine: 1) the mass flow rate in the low pressure loop in kg/s2) mass flow rate in the high pressure loop, in kg/s3) total power requirement in KW

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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 24 tons. Given : h6 = 368 kJ/kg; h2= 420 kJ/kg

Determine:

1) the mass flow rate in the low pressure loop in kg/s

2) mass flow rate in the high pressure loop, in kg/s

3) total power requirement in KW

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