Heat recovery steam generator (HRSG) is a critically important subsystem of a combined cycle. The global objective of a HRSG is to heat the stream of water. The HRSG is composed of three major sections, including an economizer, an evaporator, and a superheater. In this study, a water tube HRSG is considered and its main design features are deduced from the minimization of the entropy generation by using the constructal theory. Entropy generation is obtained by considering all irreversibilities associated with the processes. Considering the minimum total entropy generation as the objective function, the optimum parameters in the HRSG unit are derived by using the genetic algorithm method under the fixed total volume condition. In the present work, the number and arrangement of the tubes, the optimal diameters of tubes and spacing between adjacent tubes for three main sections, total length, width, and height of the HRSG unit and the water flow rate are significant features of the flow configuration inducted by the constructal design. Furthermore, the effect of changing in the size of the flow system on the flow architecture is determined.
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November 2012
This article was originally published in
Journal of Heat Transfer
Research-Article
Geometric and Thermodynamic Optimization of a Heat Recovery Steam Generator: A Constructal Design
M. Amidpour
M. Amidpour
1
e-mail: amidpour@kntu.ac.ir
Department of Energy System Engineering,
Department of Energy System Engineering,
Faculty of Mechanical Engineering
,K. N. Toosi University of Technology
,19991-43344 Tehran
, Iran
1Corresponding author.
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E. Norouzi
e-mail: elnaznorouzi@gmail.com
M. Mehrgoo
e-mail: mortezamehrgoo@yahoo.com
M. Amidpour
e-mail: amidpour@kntu.ac.ir
Department of Energy System Engineering,
Department of Energy System Engineering,
Faculty of Mechanical Engineering
,K. N. Toosi University of Technology
,19991-43344 Tehran
, Iran
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNALOF HEAT TRANSFER. Manuscript received October 5, 2011; final manuscript received June 8, 2012; published online September 28, 2012. Assoc. Editor: Giulio Lorenzini.
J. Heat Transfer. Nov 2012, 134(11): 111801 (12 pages)
Published Online: September 28, 2012
Article history
Received:
October 5, 2011
Revision Received:
June 8, 2012
Citation
Norouzi, E., Mehrgoo, M., and Amidpour, M. (September 28, 2012). "Geometric and Thermodynamic Optimization of a Heat Recovery Steam Generator: A Constructal Design." ASME. J. Heat Transfer. November 2012; 134(11): 111801. https://doi.org/10.1115/1.4007070
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