A refrigerator working on Carnot cycle uses R134a as the working fluid. The refrigerant changes from saturated vapor to saturated liquid at 30 C° in the condenser as it rejects heat. The evaporator pressure is 120 kPa. Show the cycle on a T-s diagram relative to saturation lines, and determine (a) COP F (b) Amount of heat absorbed from the refrigerated space, and (c) Consumed work.

A refrigerator working on Carnot cycle uses R134a as the working fluid. The refrigerant changes from saturated vapor to saturated liquid at 30 C° in the condenser as it rejects heat. The evaporator pressure is 120 kPa. Show the cycle on a T-s diagram relative to saturation lines, and determine (a) COP F (b) Amount of heat absorbed from the refrigerated space, and (c) Consumed work.

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

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 15RQ: Why is two-stage compression popular for extra-low-temperature refrigeration systems?

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Question

A refrigerator working on Carnot cycle uses R134a as the working fluid. The refrigerant
changes from saturated vapor to saturated liquid at 30 C° in the condenser as it rejects
heat. The evaporator pressure is 120 kPa. Show the cycle on a T-s diagram relative to
saturation lines, and determine
(a) COP F
(b) Amount of heat absorbed from the refrigerated space, and
(c) Consumed work.

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Step 2: Calculate COP and amount of heat absorbed from the refrigerated space:-

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Step 3: Calculate amount of work consumed :-

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