A two-stage cascade refrigeration system uses ammonia as the working substance. The evaporator is at -40 deg C and the high-pressure condenser is at 2035.9 kPa. The cascade condenser is a direct-contact type. The refrigeration load is 90 tons.compute for the cascade condenser pressure in kPa for minimum work. compute for the mass flow rate of the refrigerant in the low pressure loop. compute for the mass flow rate of the refrigerant in the high pressure loop.compute for the power requirement in the low stage loop. compute for the power requirement in the high stage loop. compute the total power requirement for the system. compute the COP for the system. compute the percentage of quantity of the fluid entering the evaporator.

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
Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems
Section: Chapter Questions
Problem 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....
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A two-stage cascade refrigeration system uses ammonia as the working substance. The evaporator is at -40 deg C and the high-pressure condenser is at 2035.9 kPa. The cascade condenser is a direct-contact type. The refrigeration load is 90 tons.compute for the cascade condenser pressure in kPa for minimum work. compute for the mass flow rate of the refrigerant in the low pressure loop. compute for the mass flow rate of the refrigerant in the high pressure loop.compute for the power requirement in the low stage loop. compute for the power requirement in the high stage loop. compute the total power requirement for the system. compute the COP for the system. compute the percentage of quantity of the fluid entering the evaporator.

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