Analysis of Multipass Heat Exchangers With Variable Properties and Transfer Rate

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Abstract
This paper presents a matrix solution technique for multishell, multitube-pass heat exchangers with variable heat transfer film coefficients and heat capacity rates. Using this method, a series of case studies has been made, whose results are used to check the validity of certain facets of the normal design practice. Some parameters have been examined and discussed in details including the applicable range of Colburn’s caloric temperature factor, effect of shell nozzle orientation, local coefficient of the multipass exchangers with tube side in laminar flow and flow instability phenomenon across the viscous flow coolers.

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