Carnot heat engine receives heat at 750k and rejects the waste heat to the environment at 300k .the entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the cooled space at -15 degrees Celsius at a rate of 400KJ/min and rejects it to the same environment at 300K.Determine the rate of heat supplied to the environment and the total rate of heat rejection to the environment

Carnot heat engine receives heat at 750k and rejects the waste heat to the environment at 300k .the entire work output of the heat engine is used to drive a Carnot refrigerator that removes heat from the cooled space at -15 degrees Celsius at a rate of 400KJ/min and rejects it to the same environment at 300K.Determine the rate of heat supplied to the environment and the total rate of heat rejection to the environment

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 12RQ: Refrigerators currently being manufactured in the United States are using______as their refrigerant.

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In an area, heat is supplied at a heat engine with a temperature of 700°C, while waste heat is disposed at 60°C. Then, a generator is connected together with a heat pump to the heat engine to check the amount of power being produced. If the heat pump will warm the area at 25°C, while its outside temperature is at 10°C. The area now loses 80,000 kJ/hr of heat. And, 20% of the heat engine’s power output will go to the heat pump. How much needs to be burned by the heat engine to maintain the temperature in the area? Assuming a carnot heat engine and heat pump.
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A refrigeration unit is cooling a space to -5 °C by rejecting energy to the atmosphere at 20 °C. It is desired to reduce the temperature in the refrigerated space to -25°C. Calculate the minimum percentage increase in work required, by assuming a Carnot refrigerator, for the same amount of energy removed.
Quickly please.
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