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Titolo:
Entropy generation minimization in parallel-plates counterflow heat exchangers
Autore:
Ordonez, JC; Bejan, A;
Indirizzi:
Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27708 USA Duke Univ Durham NC USA 27708 t Mech Engn & Mat Sci, Durham, NC 27708 USA
Titolo Testata:
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
fascicolo: 10, volume: 24, anno: 2000,
pagine: 843 - 864
SICI:
0363-907X(200008)24:10<843:EGMIPC>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Keywords:
entropy generation minimization; EGM; thermodynamic optimization; thermodynamic design; exergy analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Bejan, A Duke Univ, Dept Mech Engn & Mat Sci, Box 90300, Durham, NC 27708 USA Duke Univ Box 90300 Durham NC USA 27708 300, Durham, NC 27708 USA
Citazione:
J.C. Ordonez e A. Bejan, "Entropy generation minimization in parallel-plates counterflow heat exchangers", INT J ENERG, 24(10), 2000, pp. 843-864

Abstract

This paper shows that the main architectural features of a counterflow heat exchanger can be determined based on thermodynamic optimization subject to volume constraint. It is assumed that the channels are formed by parallelplates, the two fluids are ideal gases, and the flow is fully developed, laminar or turbulent. In the first part of the paper, it is shown that the irreversibility of the heat exchanger core is minimized with respect to (1) the ratio of the two-channel spacings, and (2) the total heat transfer areabetween the two streams. In the second part, the entropy generation rate also accounts for the irreversibility due to discharging the spent hot stream into the ambient. It is shown that the design can be optimized with respect to (1), (2) and (3) the ratio of the capacity rates of the two streams. The optimized features of the geometry are robust with respect to whether the external discharge irreversibility is included in the entropy generationrate calculation. Copyright (C) 2000 John Wiley & Sons, Ltd.

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Documento generato il 14/07/20 alle ore 03:27:39