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Titolo:
An analytical solution for a cyclic regenerator in the warm-up period in presence of an axially dispersive wave
Autore:
Roy, A; Das, SK;
Indirizzi:
Indian Inst Technol, Dept Mech Engn, Heat Transfer & Thermal Power Lab, Madras 600036, Tamil Nadu, India Indian Inst Technol Madras Tamil Nadu India600036 036, Tamil Nadu, India
Titolo Testata:
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
fascicolo: 1, volume: 40, anno: 2001,
pagine: 21 - 29
SICI:
1290-0729(200101)40:1<21:AASFAC>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLATE HEAT-EXCHANGERS; LONGITUDINAL DISPERSION; MODEL;
Keywords:
regenerator; cyclic heating; periodic heat transfer; axial dispersion; regenerative heat exchange;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Das, SK Indian Inst Technol, Dept Mech Engn, Heat Transfer & Thermal PowerLab, Madras 600036, Tamil Nadu, India Indian Inst Technol Madras Tamil Nadu India 600036 il Nadu, India
Citazione:
A. Roy e S.K. Das, "An analytical solution for a cyclic regenerator in the warm-up period in presence of an axially dispersive wave", INT J TH SC, 40(1), 2001, pp. 21-29

Abstract

Regenerative heat exchangers are important components of energy intensive sectors such as chemical process, power, metallurgical and cryogenic industry. The challenge of simulating regenerators accurately is considerable in view of the transient cyclic process taking place in it. The simulation of warm-up period is even more challenging due to the change in temperature profiles after each cycle. In the present work a modern technique based on the "axial dispersion model" has been utilized to simulate the regenerative heat exchanger both in the warm-up and pseudo-steady state operation. The advantage of this model is that it takes all the flow maldistribution and backmixing effects into consideration instead of idealizing the flow to be so called "plug flow". In contrast to previous studies with dispersion, in thepresent study the dispersion is considered to propagate with a finite propagation velocity following a hyperbolic law which is physically more consistent. The effect of different parameters on the cyclic response has been brought out and the results have been verified by comparing results of a rotary regenerator available in literature. The technique utilized in the present study can act as a tool for modelling regenerators where non-uniformity in flow distribution is significant. (C) 2001 Editions scientifiques et medicales Elsevier SAS.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 08:57:38