Answered: Derive an expression for the COP of a…

Derive an expression for the COP of a completely reversible refrigerator in terms of the thermal energy reservoir temperatures, TL and TH.

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

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 2RQ: The operating condition for the single compressor in a household refrigerator is the lowest box...

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Question

Derive an expression for the COP of a completely
reversible refrigerator in terms of the thermal energy reservoir
temperatures, TL and TH.

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The operating condition for the single compressor in a household refrigerator is the lowest box temperature, which is typically A. 0F B. -20F C. 20F D. 40F
Prove that a refrigerator’s COP cannot exceed that of a completely reversible refrigerator that shares the same thermal energy reservoirs.
Using the concepts in Energy Flow Diagram of a Refrigerator under Cyclic Process answer the set of problems below:
Define the no refrigerator can have a higher COP than a reversible refrigerator operating between the same temperature limits.
Prove that the COP of all completely reversible refrigerators must be the same when the reservoir temperatures are the same.
mechanical engineering, If a reversed Carnot cycle operates between the temperature limits of 27°C and -3°C, then what is the ratio of the COP of a refrigerator to that of a heat pump?
What is the COP of a reversible refrigerator operating between 0 degrees C and 26 degrees C?
Calculate and plot the COP of a completely reversible refrigerator as a function of the temperature of the sink up to 500 K with the temperature of the source fixed at 250 K.
A completely reversible refrigerator is driven by a 10-kW compressor and operates with thermal energy reservoirs at 250 K and 300 K. Calculate the rate of cooling provided by this refrigerator
A refrigeration cycle is executed with R-134a under the saturation dome between the pressure limits of 1.6 and 0.2 MPa. If the power consumption of the refrigerator is 3 kW, the maximum rate of heat removal from the cooled space of this refrigerator is (a) 0.45 kJ/s (b) 0.78 kJ/s (c) 3.0 kJ/s (d) 11.6 kJ/s (e) 14.6 kJ/s
Calculate the thermal efficiency of a Carnot cycle heat engine operating betweenreservoirs at 300℃ and 45℃
A Carnot heat engine, shown in Fig. 6–47, receives 500 kJ of heat per cycle from a high-temperature source at 652°C and rejects heat to a low-temperature sink at 30°C. Determine the thermal efficiency of this Carnot engine.