The constructal size of a heat exchanger

Bejan, A.; Lorente, S.; Martins, L.; Meyer, Josua P.

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dc.contributor.author	Bejan, A.
dc.contributor.author	Lorente, S.
dc.contributor.author	Martins, L.
dc.contributor.author	Meyer, Josua P.
dc.date.accessioned	2017-09-11T11:09:17Z
dc.date.available	2017-09-11T11:09:17Z
dc.date.issued	2017-08-09
dc.description.abstract	The 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.department	Mechanical and Aeronautical Engineering	en_ZA
dc.description.librarian	am2017	en_ZA
dc.description.sponsorship	The work by Professor Bejan’s was supported by the U.S. National Science Foundation.	en_ZA
dc.description.uri	http://scitation.aip.org/content/aip/journal/jap	en_ZA
dc.identifier.citation	Bejan, 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.issn	0021-8979 (print)
dc.identifier.issn	1089-7550 (online)
dc.identifier.other	10.1063/1.4991014
dc.identifier.uri	http://hdl.handle.net/2263/62222
dc.language.iso	en	en_ZA
dc.publisher	American Institute of Physics	en_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.subject	Heat exchangers	en_ZA
dc.subject	Size question	en_ZA
dc.subject	Stationary power	en_ZA
dc.subject	Power requirement	en_ZA
dc.subject	Heat transfer and fluid flow	en_ZA
dc.subject	Flow passage	en_ZA
dc.subject	Cross-sectional shape	en_ZA
dc.subject	Constructal	en_ZA
dc.subject	Architectural features	en_ZA
dc.subject	Laminar flow	en_ZA
dc.subject	Flow of fluids	en_ZA
dc.subject.other	Engineering, built environment and information technology articles SDG-07
dc.subject.other	SDG-07: Affordable and clean energy
dc.subject.other	Engineering, built environment and information technology articles SDG-09
dc.subject.other	SDG-09: Industry, innovation and infrastructure
dc.subject.other	Engineering, built environment and information technology articles SDG-12
dc.subject.other	SDG-12: Responsible consumption and production
dc.title	The constructal size of a heat exchanger	en_ZA
dc.type	Article	en_ZA