Transient Behavior of Crossflow Heat Exchangers With Longitudinal Conduction and Axial Dispersion-Reference-Cited by-同舟云学术

Transient Behavior of Crossflow Heat Exchangers With Longitudinal Conduction and Axial Dispersion

Published:2004-06-01 Issue:3 Volume:126 Page:425-433
ISSN:0022-1481
Container-title:Journal of Heat Transfer
language:en
Short-container-title:

Author:

Mishra Manish¹,Das P. K.²,Sarangi Sunil³

Affiliation:

1. Mechanical Engineering Department, Indian Institute of Technology, Kharagpur, India, 721302

2. Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, India, 721302

3. Cryogenic Engineering Center, Indian Institute of Technology, Kharagpur, India, 721302

Abstract

Transient temperature response of the crossflow heat exchangers with finite wall capacitance and both fluids unmixed is investigated numerically for step, ramp and exponential perturbations provided in hot fluid inlet temperature. Effect of two-dimensional longitudinal conduction in separating sheet and axial dispersion in fluids on the transient response has been investigated. Conductive heat transport due to presence of axial dispersion in fluids have been analyzed in detail and shown that presence of axial dispersion in both of the fluid streams neutralizes the total conductive heat transport during the energy balance. It has also been shown that the presence of axial dispersion of high order reduces the effect of longitudinal conduction.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/heattransfer/article-pdf/126/3/425/5790787/425_1.pdf

Reference20 articles.

1. Dusinberre, G. M. , 1959, “Calculation of Transients in a Crossflow Heat Exchanger,” ASME J. Heat Transfer, 81, pp. 61–67.

2. Myers, G. E., Mitchell, J. W., and Norman, R. F., 1967, “The Transient Response of Crossflow Heat Exchangers, Evaporators, and Condensers,” ASME J. Heat Transfer, 89, pp. 75–80.

3. Myers, G. E., Mitchell, J. W., and Lindeman, Jr., C. P., 1970, “The Transient Response of Heat Exchangers Having an Infinite Capacitance Rate Fluid,” ASME J. Heat Transfer, 92, pp. 269–275.

4. Yamashita, H., Izumi, R., and Yamaguchi, S., 1978, “Analysis of the Dynamic Characteristics of Crossflow Heat Exchanger With Both Fluids Unmixed,” Bull. JSME, 21, pp. 479–485.

5. Kou, H. S., and Yuan, P., 1994, “Effect of Longitudinal Separator Sheet Conduction on the Transient Thermal Response of Crossflow Heat Exchangers With Neither Gas Mixed,” Numer. Heat Transfer, Part A, 25, pp. 223–236.

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