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Title: Transient Behavior of Crossflow Heat Exchangers With Longitudinal Conduction and Axial Dispersion
Authors: Mishra, M
Das, P K
Sarangi, S K
Keywords: axial dispersion
heat exchanger
transient behaviour
Issue Date: 2004
Publisher: ASME
Citation: Journal of Heat Transfer, Vol 126, Iss 3, P 425-433
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 analysed in detail and shown that presence of axial dispersion in both of the fluid streams neutralises 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.
Description: Copyright for this article belongs to ASME
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