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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1434

Title: Second-law based thermodynamic analysis of Brayton/Rankine combined power cycle with reheat
Authors: Khaliq, A
Kaushik, S C
Keywords: thermodynamic analysis
specific power-output
thermal efficiency
exergy destruction
second-law efficiency
gas-turbine cycle
pressure ratio
cycle temperature- ratio
number of reheats
cycle pressure-drop
intermediate pressure-ratio
Issue Date: 2004
Citation: Applied Energy, 78(2), 179-197
Abstract: The aim of the present paper is to use the second-law approach for the thermodynamic analysis of the reheat combined Brayton/Rankine power cycle. Expressions involving the variables for specific power-output, thermal efficiency, exergy destruction in components of the combined cycle, second-law efficiency of each process of the gas-turbine cycle, and second-law efficiency of the steam power cycle have been derived. The standard approximation for air with constant properties is used for simplicity. The effects of pressure ratio, cycle temperature- ratio, number of reheats and cycle pressure-drop on the combined cycle performance parameters have been investigated. It is found that the exergy destruction in the combustion chamber represents over 50% of the total exergy destruction in the overall cycle. The combined cycle efficiency and its power output were maximized at an intermediate pressure-ratio, and increased sharply up to two reheat-stages and more slowly thereafter.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1434
Appears in Collections:Energy Studies [CES]

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