Title: Assessing and improving the efficiencies of a steam power plant using exergy analysis. Part 2: improvements from modifying reheat pressure

Authors: Marc A. Rosen, Raymond Tang

Addresses: Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7L7, Canada. ' Kishimoto Sangyo (HK) Co Ltd., Unit 2608, The Metropolis Tower, 10 Metropolis Drive, Hunghom, Kowloon, Hong Kong

Abstract: The effect of increasing reheat pressure on the exergy efficiency of a coal-fired steam power plant is investigated. The results show that although the irreversibility rate associated with heat transfer in the steam generator decreases as reheat pressure increases, the overall-plant exergy efficiency decreases, mainly owing to the relatively large decrease in shaft power output. The results suggest, therefore, that investigations into the effect of decreasing reheat pressure may be merited.

Keywords: exergy; energy; efficiency; electricity; power plants; reheat pressure; improvements; steam power.

DOI: 10.1504/IJEX.2006.010231

International Journal of Exergy, 2006 Vol.3 No.4, pp.377 - 390

Published online: 11 Jul 2006 *

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