A Brayton cycle with regeneration using air as the working fluid has a pressure ratio of 10. The minimum and maximum temperatures in the cycle are 32°C and 1067 °C. Assuming an isentropic efficiency of 81% for the compressor and 86 % for the turbine, and an effectiveness of 75 % for the regenerator, also assuming a source temperature of 1600 K and a sink temperature of 300 K. Determine (a) the thermal efficiency of this cycle, (b) the exergy destruction associated with the combustion chamber, (c) the exergy of the exhaust gases at the exit of the regenerator, and (d) the second-law efficiency of this cycle. Use variable specific heats for air.

A Brayton cycle with regeneration using air as the working fluid has a pressure ratio of 10. The minimum and maximum temperatures in the cycle are 32°C and 1067 °C. Assuming an isentropic efficiency of 81% for the compressor and 86 % for the turbine, and an effectiveness of 75 % for the regenerator, also assuming a source temperature of 1600 K and a sink temperature of 300 K. Determine (a) the thermal efficiency of this cycle, (b) the exergy destruction associated with the combustion chamber, (c) the exergy of the exhaust gases at the exit of the regenerator, and (d) the second-law efficiency of this cycle. Use variable specific heats for air.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A Brayton cycle with regeneration using air as the working fluid has a pressure ratio of 10. The minimum
and maximum temperatures in the cycle are 32°C and 1067 °C. Assuming an isentropic efficiency of
81% for the compressor and 86 % for the turbine, and an effectiveness of 75 % for the regenerator, also
assuming a source temperature of 1600 K and a sink temperature of 300 K. Determine (a) the thermal
efficiency of this cycle, (b) the exergy destruction associated with the combustion chamber, (c) the
exergy of the exhaust gases at the exit of the regenerator, and (d) the second-law efficiency of this cycle.
Use variable specific heats for air.

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