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热管科学与技术

ISSN 打印: 2151-7975
ISSN 在线: 2151-7991

Archives: Volume 1, 2010 to Volume 8, 2017

热管科学与技术

DOI: 10.1615/HeatPipeScieTech.2016010994
pages 11-23

COMPARATIVE ANALYSIS OF HEAT-TRANSFER CAPABILITY OF EVAPORATION− CONDENSATION AND RECUPERATIVE TUBULAR HEAT EXCHANGERS

A. Gershuni
Heat Pipe Laboratory, National Technical University of Ukraine "Kyiv Polytechnic Institute", 37 Peremogy Ave., Kiev, 03056, Ukraine
A. P. Nishchik
Heat Pipe Laboratory, National Technical University of Ukraine "Kyiv Polytechnic Institute", 37 Peremogy Ave., Kiev 03056, Ukraine
Victor Razumovskiy
Heat Pipe Laboratory, National Technical University of Ukraine "Kyiv Polytechnic Institute", 37 Peremogy Ave., Kiev 03056, Ukraine

ABSTRACT

A comparative analysis of heat-transfer capability of both the evaporation−condensation type and recuperative tubular heat exchangers has been made. Two different heat exchangers of the "gas-to-gas" type, one composed of evaporation−condensation elements (thermosyphons) and another composed of a conventional bundle of tubes, were analyzed. Mathematical expressions of the heat-transfer characteristics of specified heat exchangers that depend on the design and thermophysical characteristics of heat transfer have been obtained and analyzed. As a result of the analysis performed, dimensionless thermophysical and design factors that impact on the ratio of transferred heat fluxes have been found and the features of this impact have been discussed. The analysis demonstrated a significant advantage in heat transfer capability of heat exchangers of evaporation−condensation type in comparison with recuperative tubular heat exchangers.


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