Library Subscription: Guest
Home Archives Officers Future meetings Assembly for International Heat Transfer Conferences

HEAT TRANSFER AND FRICTION CORRELATIONS FOR PLATE FINNED-TUBE HEAT EXCHANGERS HAVING PLAIN FINS

D. L. Gray
Department of Mechanical Engineering The Pennsylvania State University University Park, PA 16802

Ralph L. Webb
Department of Mechanical Engineering The Pennsylvania State University, University Park, PA 16802, USA

Abstract

This paper is concerned with heat exchangers having continuous, flat fins on a staggered array of circular tubes. Correlations are developed to predict the air-side heat transfer coefficient and friction factor as a function of the Reynolds number and the geometric variables of the heat exchanger. The results are applicable to any number of tube rows in the air flow direction. A multiple regression technique was used with data for 16 heat exchangers to develop the heat transfer correlation. The rms error of the resulting correlation is 7.3%. The friction correlation is based on a superposition model, which assumes that the drag force on the tubes and that on the fins may be added together. After subtracting the tube bank friction loss from the 18 sets of heat exchanger data, a multiple regression technique was used to correlate the fin friction data. The resulting heat exchanger friction factor correlated the 18 data set with an rms deviation of 7.8%.

Download article Publication Ethics and Malpractice Recommend to my Librarian Bookmark this Page