On Realization of Ideal Multiflow Heat Exchange

It is shown that the conditions of ideal heat exchange, according to which at the given heat load and overall heat transfer coefficient the entropy production in the system attains its lower boundary, can be realized in a set of countercurrent heat exchangers on coordinated selection of temperatures...

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Bibliographic Details
Published in:Journal of engineering physics and thermophysics 2020-07, Vol.93 (4), p.757-765
Main Author: Tsirlin, A. M.
Format: Article
Language:English
Subjects:
Classical Mechanics
Complex Systems
Engineering
Engineering Thermodynamics
Equipment and supplies
General Problems of Transport Theory
Heat and Mass Transfer
Heat exchange
Heat exchangers
Heat transfer
Heat transfer coefficients
Heating
Industrial Chemistry/Chemical Engineering
Temperature profiles
Thermodynamics
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Summary:It is shown that the conditions of ideal heat exchange, according to which at the given heat load and overall heat transfer coefficient the entropy production in the system attains its lower boundary, can be realized in a set of countercurrent heat exchangers on coordinated selection of temperatures and heat capacities of flows. The parameters of flows and the distribution of heat transfer coefficients and heat loads between two-flow heat exchangers for the Newtonian kinetics have been determined. The value of the minimal dissipation and the profile of the distribution of the overall heat transfer coefficient for the case where the temperature profile of one of the flows is fixed have been obtained.
ISSN:1062-0125
1573-871X
DOI:10.1007/s10891-020-02176-7