A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor- compression refrigeration cycle between 0.1 and 0.8 MPa. The mass flow rate of the refrigerant is 0.035 kg/s. (a) Identify the difference(s) between the reverse Carnot cycle with this ideal vapor- compression 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
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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A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor-
compression refrigeration cycle between 0.1 and 0.8 MPa. The mass flow rate of the
refrigerant is 0.035 kg/s.
(a) Identify the difference(s) between the reverse Carnot cycle with this ideal vapor-
compression cycle.
(b) Show the cycle on a T-s diagram with respect to saturation lines.
(c) Evaluate the rate of heat removal from the refrigerated space and the power input
to the compressor.
(d) Calculate the rate of heat rejection to the environment and the COP of the cycle.
Transcribed Image Text:A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor- compression refrigeration cycle between 0.1 and 0.8 MPa. The mass flow rate of the refrigerant is 0.035 kg/s. (a) Identify the difference(s) between the reverse Carnot cycle with this ideal vapor- compression cycle. (b) Show the cycle on a T-s diagram with respect to saturation lines. (c) Evaluate the rate of heat removal from the refrigerated space and the power input to the compressor. (d) Calculate the rate of heat rejection to the environment and the COP of the cycle.
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