HEAT TRANSFER OF CIRCULAR FINNED TUBES WITH NONUNIFORM OPERATIONAL FOULING OF THE INTERFIN SPACE

This paper presents the results of a theoretical calculation of the heat transfer of fi nned tubes for air-cooled heat exchangers having external operational foulings. To determine the heat resistance of the fouling layer, a problem on the temperature distribution in the ring layer has been formulated and solved. The minimum and the surface-average temperatures of the fouling, the heat resistance of the ring layer, and the heat transfer coeffi cient of the fi nned tube heat exchanger have been calculated. It has been shown that the heat transfer coeffi cient is the most strongly infl uenced by the fouling layer thickness at the base of the fi ns.
   
Author:  T. B. Karlovich
Keywords:  heat transfer coeffi cient, heat resistance, heat conductivity, temperature, air-cooled heat exchanger
Page:  1211