1. A Carnot refrigeration cycle operates in a room in which the temperature is 20 °C. It is required to transfer heat from the cold space at the rate of 5 kW in order to maintain its temperature at -30 °C. What power motor is required to operate this refrigerator. 2. Calculate the thermal efficiency of a Carnot cycle heat engine operating between 500 °C and 40 °C.
1. A Carnot refrigeration cycle operates in a room in which the temperature is 20 °C. It is required to transfer heat from the cold space at the rate of 5 kW in order to maintain its temperature at -30 °C. What power motor is required to operate this refrigerator. 2. Calculate the thermal efficiency of a Carnot cycle heat engine operating between 500 °C and 40 °C.
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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Second Law of
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![Second Law of Thermodynamics
1. A Carnot refrigeration cycle operates in a room in which the temperature is 20 °C. It is
required to transfer heat from the cold space at the rate of 5 kW in order to maintain its
temperature at -30 °C. What power motor is required to operate this refrigerator.
2. Calculate the thermal efficiency of a Carnot cycle heat engine operating between 500 °C and
40 °C.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fef4abb29-973a-44d3-9b2d-c4032542ce74%2F8b6bb009-9af2-474b-8d53-0af33bdfa39a%2Ftbx9kwj_processed.png&w=3840&q=75)
Transcribed Image Text:Second Law of Thermodynamics
1. A Carnot refrigeration cycle operates in a room in which the temperature is 20 °C. It is
required to transfer heat from the cold space at the rate of 5 kW in order to maintain its
temperature at -30 °C. What power motor is required to operate this refrigerator.
2. Calculate the thermal efficiency of a Carnot cycle heat engine operating between 500 °C and
40 °C.
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