A heat engine operates between a source at 452°C and a sink at 26°C. If heat is supplied to the heat engine at a steady rate of 45000 kJ/min: The Carnot efficiency of the cycle is: The rejected (waste) heat from the cycle is The maximum power output of this heat engine is O kJ/min → kW

A heat engine operates between a source at 452°C and a sink at 26°C. If heat is supplied to the heat engine at a steady rate of 45000 kJ/min: The Carnot efficiency of the cycle is: The rejected (waste) heat from the cycle is The maximum power output of this heat engine is O kJ/min → kW

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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Question

A heat engine operates between a source at 452°C and a sink at 26°C. If heat is
supplied to the heat engine at a steady rate of 45000 kJ/min:
The Carnot efficiency of the cycle is:
The rejected (waste) heat from the cycle is
The maximum power output of this heat engine is
→
+
kJ/min
kW

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Step 2: 1) Calculation of Carnot efficiency of the cycle

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Step 3: 2) Calculation of the heat rejected from the cycle

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Step 4: 3) The maximum power output of the heat engine

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Consider three reservoirs that are TH = 473.2 K, TL = 293.2 K and TI = 277.2 K. A Carnot heat engine can be reversed and used as either a heat pump or a refrigerator. In the case of a heat pump the heat flow to the higher temperature reservoir is the desired output and it is used to heat a room or building. In the case of the refrigerator the desired energy flow is the heat in from a region to be cooled. For the heat pump or refrigerator, the work input is provided by electricity. For this information answer the following question: a) Calculate the Carnot Efficiency of a heat engine that operates between TH and TL.
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