ANALYTICAL RESEARCH OF COUNTERFLOW HEAT EXCHANGERS

Authors

  • М. Б. Кравченко Одесская государственная академия холода, ул. Дворянская, 1/3, Одесса, Украина, 65026, Ukraine

DOI:

https://doi.org/10.18198/j.ind.gases.2010.0518

Keywords:

Cryogenic gas machines, Counterflow heat exchanger, Longitudinal thermal conductivity, Flows temperature, Entropy production, The efficiency of the heat exchanger, The second law of thermodynamics

Abstract

A mathematical model of counterflow heat exchanger, taking into account the longitudinal heat conductivity of the wall separating the flows, is worked out. With the transformation to dimensionless variables, our solution allows compact to provide information about all great number of such heat exchangers. Shown that at a certain ratio of the dimensionless parameters the temperature distribution in the real counterflow heat exchanger can be almost the same as in an ideal heat exchanger, in which there is no longitudinal heat conduction. A new, more general criterion of efficiency heat exchanger is offered. 

Author Biography

М. Б. Кравченко, Одесская государственная академия холода, ул. Дворянская, 1/3, Одесса, Украина, 65026

М.B. Kravchenko

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Issue

No. 5 (2010): Технические газы

Section

PROCESSES, CYCLES, SCHEMES AND THE EQUIPMENT OF REFRIGERATION AND CRYOGENIC SYSTEMS

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