Abstract

Bimetallic pipes, consisting of a smooth steel pipe with spiral fins rolled on to the pipe are used widely in air cooling systems, heaters, condensers of refrigeration equipment, and air and gas coolers. The authors have examined the effect of the change of the height of the fin of thermal contact resistance (TCR) and the contact pressure between the steel surface and the surface of an aluminium shell and developed an approximate method of determining TCR and contact pressure which satisfies the requirements of engineering calculations

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