b) Refrigerators are systems that are used to remove heat from a cooled space then rejectheat to a space of higher temperature. Consider a refrigerator operating at normalconditions, removing heat from a cool space at a rate of 150 kJ/min to ensure therefrigerated space is kept at -5 °C. If the surrounding air is at 27 °C and assuming thatthe refrigerator is operating as a Carnot cycle, determine:1)The rate of heat being rejected to the surrounding in kJ/minThe coefficient of performance of this refrigeration process11)111)The minimum required power on this process (give your answer in kW)

calculated the rate of heat being rejected to the surrounding in kJ/min, the coefficient of…

heat to a space of higher temperature. Consider a refrigerat conditions, removing heat from a cool space at a rate of 15 refrigerated space is kept at -5 °C. If the surrounding air is at 2 he refrigerator is operating as a Carnot cycle, determine: -) 1) The rate of heat being rejected to the surrounding in kJ The coefficient of performance of this refrigeration pro The minimum required power on this process (give you 11)

heat to a space of higher temperature. Consider a refrigerat conditions, removing heat from a cool space at a rate of 15 refrigerated space is kept at -5 °C. If the surrounding air is at 2 he refrigerator is operating as a Carnot cycle, determine: -) 1) The rate of heat being rejected to the surrounding in kJ The coefficient of performance of this refrigeration pro The minimum required power on this process (give you 11)

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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Refrigerators currently being manufactured in the United States are using______as their refrigerant.
1. A Carnot heat engine absorbs heat at a rate of 10 kJ/s from a source at 500°C and rejects the waste heat to the environment at 25°C. It is proposed that the heat engine will be used to drive a Carnot refrigerator that removes heat from the cooled space at -10°C and rejects it to the same environment at 25°C. i. Determine the minimum rate of heat removal from the cooled space.
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Heat engine and refrigerator. Consider a heat engine operating between temperatures Th and Tj. During each cycle with time At, work W is extracted, so Pout = W/At. (a) Assuming the processes are all reversible, what is the efficiency of this heat engine, n = Wout/Qn? (b) Now assume that the low temperature of the heat engine is lowered by a reversible refrigerator, such that the heat engine operates between Th and T. The refrigerator takes input power Pin = Win/At and operates between T and T, where Ti < T. Draw an energy- entropy flow diagram. (c) Calculate the net efficiency (Wout - Win)/Qh. Is the efficiency of this system higher, lower, or the same as your answer for (a)?
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Using the concepts in Energy Flow Diagram of a Refrigerator under Cyclic Process answer the set of problems below:
A "cold room" used for low-temperature research is maintained at a constant temperature of 7.00°C. The refrigeration unit vents to outdoor air which is at 27.0°C. The rate at which energy is exhausted to the outdoors is 18.0 kW. The coefficient of performance (COP) of the refrigeration unit is equal to 40.0% of the COP of an ideal Carnot refrigerator. (a) At what rate (in kW) does the refrigeration unit remove energy from the room? (Round your answer to at least two decimal places.) kW (b) What is the power input (in kW) required by the refrigeration unit? kW (c) What is the entropy change of the Universe (in J/K) produced by the refrigeration unit after it operates for 3.00 h? J/K (d) If the outside temperature increases to 33.0°C, what is the percent change in the COP of the refrigeration unit? (Include the sign of the value in your answer.) % Need Help? Read It
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The objective of a refrigerator is to remove QL from the cooled space.
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