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Turbine inlet 3' 3 temperature 2' Cycle A Cycle B 2 4 1

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

Chapter31: Gas Heat

Section: Chapter Questions

Problem 44RQ: When would a combustion blower ever interpurge a furnace's heat exchange?

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Question

Two ideal Brayton cycles (see Figure below) have the same inlet temperature and the same maximum temperature of the turbine inlet. Brayton Cycle A has a higher compression ratio than Cycle B. Which of the following statements is true about the cycles?

Cycle A has a higher thermal efficiency and Cycle B has a higher work net for a given mass flow rate.

Cycle B has a higher thermal efficiency and a higher work net for a given mass flow rate.

Since the temperatures are the same the efficiencies and work net are also the same.

Cycle A has a higher work net for a given mass flow rate and Cycle B has a higher thermal efficiency.

Cycle A has a higher thermal efficiency and a higher work net for a given mass flow rate.

T
Turbine inlet
3'
3 temperature
2'
Cycle A
Cycle B
4
4'
1
S

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