Journal ArticleDOI
Transient behaviour of shell and tube heat exchangers
Wilfried Roetzel,Yimin Xuan +1 more
TLDR
In this paper, a method of predicting the transient behavior of parallel and counterflow heat exchangers is developed, whereby the effects of shell-side flow maldistribution and the finite heat capacities of both fluids, tube bundle and shell are considered.Abstract:
Based on the dispersion model rather than on the conventional plug-flow model, a method of predicting the transient behaviour of parallel and counterflow heat exchangers is developed, whereby the effects of shell-side flow maldistribution and the finite heat capacities of both fluids, tube bundle and shell are considered. The final solution has been obtained by numerical inversion of the Laplace transform, to determine the transient responses to arbitrary inlet temperature variations. The experiment was carried out in a one pass tube heat exchanger. The comparison between theoretical and experimental results is presented and the feasibility of this method is discussedread more
Citations
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Journal ArticleDOI
The time constant of double pipe and one pass shell-and-tube heat exchangers in the case of varying fluid flow rates
TL;DR: In this paper, a simplified model was proposed to characterize the behavior of a double pipe or shell and tube heat exchanger in transient phase when a sudden change of the flow rate is imposed at the entrance of one of the two inlets.
Journal ArticleDOI
Heat transfer - a review of 1993 literature
E. R. G. Eckert,Richard J Goldstein,W. E. Ibele,Suhas V. Patankar,Terrence W. Simon,Paul J Strykowski,Kumar K. Tamma,Thomas H. Kuehn,Avram Bar-Cohen,Joachim Heberlein,D.L. Hofeldt,Kim A. Stelson,Jane H. Davidson +12 more
Journal ArticleDOI
Transient heat transfert in coflow heat exchanger
F. Bagui,H. Chafouk +1 more
TL;DR: In this article, the authors present analytical expressions of fluids temperatures response time of counter-current heat exchanger when hot fluid step change is applied in the internal tube, and describe the extension of this technique to a co-flow heat exchange for which the exact solution of its mathematical model is unavailable.
Journal ArticleDOI
Steady and unsteady state thermal behaviour of triple concentric-tube heat exchanger
Nora Boultif,Cherif Bougriou +1 more
TL;DR: In this paper, the authors presented a numerical analysis by using the finite difference method to describe the steady and unsteady state thermal behavior of triple concentric-tube heat exchanger with parallel flow and counter flow arrangements.
References
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Journal ArticleDOI
Continuous flow systems
TL;DR: In this article, the authors proposed a method to predict the distribution of residence-times in large systems using distribution-functions for residence times, which can be used to calculate the efficiencies of reactors and blenders.
Journal ArticleDOI
The Dispersion of Matter in Turbulent Flow through a Pipe
TL;DR: In this paper, the dispersion of soluble matter introduced into a slow stream of solvent in a capillary tube can be described by means of a virtual coefficient of diffusion (Taylor 1953a), which represents the combined action of variation of velocity over the cross-section of the tube and molecluar diffusion in a radial direction.
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Continuous flow systems. Distribution of residence times
TL;DR: In this article, the authors proposed a method to predict the distribution of residence-times in large systems by using distribution-functions for residencetimes, which can be used to calculate the etficiencies of reactors and blenders.
Journal ArticleDOI
The theory of backmixing : By J. C. Mecklenburgh and S. Hartland; published by Wiley, London, 1975; 506 pp.; price £20.
Journal ArticleDOI
Transient Response of Parallel and Counterflow Heat Exchangers
W. Roetzel,Y. Xuan +1 more
TL;DR: In this paper, a semi-analytical method is proposed to predict the transient behavior of shell and tube heat exchanger with parallel or countercurrent flow subject to arbitrary inlet temperatures.
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