The constructal size of a heat exchanger

dc.contributor.authorBejan, A.
dc.contributor.authorLorente, S.
dc.contributor.authorMartins, L.
dc.contributor.authorMeyer, Josua P.
dc.date.accessioned2017-09-11T11:09:17Z
dc.date.available2017-09-11T11:09:17Z
dc.date.issued2017-08-09
dc.description.abstractThe architecture of heat exchangers is a classical subject that has been studied extensively in the past. In this paper, we address the fundamental question of what the size of the heat exchanger should be, in addition to what architectural features it should have. The answer to the size question follows from the tradeoff between (1) the useful power lost because of heat transfer and fluid flow and (2) the power destroyed during transportation, manufacturing, and maintenance. Changes in heat exchanger size induce changes in the opposite sign in the power requirements (1) and (2). This fundamental tradeoff regarding size is illustrated by considering one side of a heat exchanger (one flow passage) in laminar flow and in fully rough turbulent flow, with several duct cross sectional shapes and arrays of channels in parallel. The size tradeoff is present in heat exchanger applications across the board, from vehicles to stationary power plants.en_ZA
dc.description.departmentMechanical and Aeronautical Engineeringen_ZA
dc.description.librarianam2017en_ZA
dc.description.librarianmi2025en
dc.description.sdgSDG-07: Affordable and clean energyen
dc.description.sdgSDG-09: Industry, innovation and infrastructureen
dc.description.sdgSDG-12: Responsible consumption and productionen
dc.description.sponsorshipThe work by Professor Bejan’s was supported by the U.S. National Science Foundation.en_ZA
dc.description.urihttp://scitation.aip.org/content/aip/journal/japen_ZA
dc.identifier.citationBejan, A., Lorente, S., Martins, L. & Meyer, J.P. 2017, 'The constructal size of a heat exchanger', Journal of Applied Physics, vol. 122, art. no. 064902, pp. 1-6.en_ZA
dc.identifier.issn0021-8979 (print)
dc.identifier.issn1089-7550 (online)
dc.identifier.other10.1063/1.4991014
dc.identifier.urihttp://hdl.handle.net/2263/62222
dc.language.isoenen_ZA
dc.publisherAmerican Institute of Physicsen_ZA
dc.rights© 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.en_ZA
dc.subjectHeat exchangersen_ZA
dc.subjectSize questionen_ZA
dc.subjectStationary poweren_ZA
dc.subjectPower requirementen_ZA
dc.subjectHeat transfer and fluid flowen_ZA
dc.subjectFlow passageen_ZA
dc.subjectCross-sectional shapeen_ZA
dc.subjectConstructalen_ZA
dc.subjectArchitectural featuresen_ZA
dc.subjectLaminar flowen_ZA
dc.subjectFlow of fluidsen_ZA
dc.subject.otherEngineering, built environment and information technology articles SDG-07
dc.subject.otherSDG-07: Affordable and clean energy
dc.subject.otherEngineering, built environment and information technology articles SDG-09
dc.subject.otherSDG-09: Industry, innovation and infrastructure
dc.subject.otherEngineering, built environment and information technology articles SDG-12
dc.subject.otherSDG-12: Responsible consumption and production
dc.titleThe constructal size of a heat exchangeren_ZA
dc.typeArticleen_ZA

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