Entropy generation minimization: A practical approach for performance evaluation of temperature cascaded co-generation plants

Handle URI:
http://hdl.handle.net/10754/562345
Title:
Entropy generation minimization: A practical approach for performance evaluation of temperature cascaded co-generation plants
Authors:
Myat, Aung; Thu, Kyaw; Kim, Youngdeuk; Saha, Bidyut Baran; Ng, K. C.
Abstract:
We present a practical tool that employs entropy generation minimization (EGM) approach for an in-depth performance evaluation of a co-generation plant with a temperature-cascaded concept. Co-generation plant produces useful effect production sequentially, i.e., (i) electricity from the micro-turbines, (ii) low pressure steam at 250 °C or about 8-10 bars, (iii) cooling capacity of 4 refrigeration tones (Rtons) and (iv) dehumidification of outdoor air for air conditioned space. The main objective is to configure the most efficient configuration of producing power and heat. We employed entropy generation minimization (EGM) which reflects to minimize the dissipative losses and maximize the cycle efficiency of the individual thermally activated systems. The minimization of dissipative losses or EGM is performed in two steps namely, (i) adjusting heat source temperatures for the heat-fired cycles and (ii) the use of Genetic Algorithm (GA), to seek out the sensitivity of heat transfer areas, flow rates of working fluids, inlet temperatures of heat sources and coolant, etc., over the anticipated range of operation to achieve maximum efficiency. With EGM equipped with GA, we verified that the local minimization of entropy generation individually at each of the heat-activated processes would lead to the maximum efficiency of the system. © 2012.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC); Water Desalination & Reuse Research Cntr
Publisher:
Elsevier BV
Journal:
Energy
Issue Date:
Oct-2012
DOI:
10.1016/j.energy.2012.07.062
Type:
Article
ISSN:
03605442
Sponsors:
The authors gratefully express the gratitude to Agency of Science, Technology and Research (A*STAR) for their generous financial support for the project (Grant Number R-265-000-287-305).
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorMyat, Aungen
dc.contributor.authorThu, Kyawen
dc.contributor.authorKim, Youngdeuken
dc.contributor.authorSaha, Bidyut Baranen
dc.contributor.authorNg, K. C.en
dc.date.accessioned2015-08-03T10:01:46Zen
dc.date.available2015-08-03T10:01:46Zen
dc.date.issued2012-10en
dc.identifier.issn03605442en
dc.identifier.doi10.1016/j.energy.2012.07.062en
dc.identifier.urihttp://hdl.handle.net/10754/562345en
dc.description.abstractWe present a practical tool that employs entropy generation minimization (EGM) approach for an in-depth performance evaluation of a co-generation plant with a temperature-cascaded concept. Co-generation plant produces useful effect production sequentially, i.e., (i) electricity from the micro-turbines, (ii) low pressure steam at 250 °C or about 8-10 bars, (iii) cooling capacity of 4 refrigeration tones (Rtons) and (iv) dehumidification of outdoor air for air conditioned space. The main objective is to configure the most efficient configuration of producing power and heat. We employed entropy generation minimization (EGM) which reflects to minimize the dissipative losses and maximize the cycle efficiency of the individual thermally activated systems. The minimization of dissipative losses or EGM is performed in two steps namely, (i) adjusting heat source temperatures for the heat-fired cycles and (ii) the use of Genetic Algorithm (GA), to seek out the sensitivity of heat transfer areas, flow rates of working fluids, inlet temperatures of heat sources and coolant, etc., over the anticipated range of operation to achieve maximum efficiency. With EGM equipped with GA, we verified that the local minimization of entropy generation individually at each of the heat-activated processes would lead to the maximum efficiency of the system. © 2012.en
dc.description.sponsorshipThe authors gratefully express the gratitude to Agency of Science, Technology and Research (A*STAR) for their generous financial support for the project (Grant Number R-265-000-287-305).en
dc.publisherElsevier BVen
dc.subjectAbsorptionen
dc.subjectAdsorptionen
dc.subjectGeneric Algorithmen
dc.subjectOptimizationen
dc.subjectSpecific entropy generationen
dc.subjectTemperature cascaded co-generationen
dc.titleEntropy generation minimization: A practical approach for performance evaluation of temperature cascaded co-generation plantsen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.contributor.departmentWater Desalination & Reuse Research Cntren
dc.identifier.journalEnergyen
dc.contributor.institutionExperimental Power Grid Centre, Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A STAR), 3 Pesek Road, Jurong Island 627590, Singaporeen
dc.contributor.institutionMechanical Engineering Department, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singaporeen
dc.contributor.institutionMechanical Engineering Department, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japanen
dc.contributor.institutionInternational Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Japanen
kaust.authorThu, Kyawen
kaust.authorKim, Youngdeuken
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