The effect of artificial vaporization centers on heat exchange during boiling of the film irrigating a bundle of horizontal finned pipes
I.I. Gogonin
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Keywords: package of finned pipes, heat exchange during evaporation, intensification of heat exchange
Abstract
In industry, there is a whole class of heat exchangers with low values of specific heat fluxes: evaporators of refrigerating machines, steam generators of binary freon stations, steam generators of heat pumps, etc. Such heat exchange modes are realized when boiling in the film is just beginning, and the intensity of heat exchange during evaporation is commensurate with the heat exchange during boiling. The article presents the results of an experimental study of heat transfer during boiling on copper finned pipes, the entire surface of which is subjected to special treatment in an air stream containing corundum particles with the size below 500 microns. The result of such treatment is a significant decrease in the temperature head, at which boiling and a noticeable intensification of heat transfer, compared to a finned pipe without treatment with corundum particles, begin.
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