Date on Master's Thesis/Doctoral Dissertation

6-1945

Document Type

Master's Thesis

Degree Name

M. Eng.

Department

Chemical Engineering

Subject

Heat exchangers, Heat--Conduction

Abstract

A unit was constructed for the study of film heat transfer coefficients of a heavy fuel oil in viscous or streamline flow. The heat exchanger was of the shell and tube type, having extended longitudinal steel fins welded to the tube. Auxiliary equipment consisted of an oil pump, oil storage reservoirs, piping, and means for measurement of temperatures and oil flow rates. The unit was operated both as a fin type heat exchanger with the oil in contact with the finned surfaces, and as a straight tube and shell exchanger with the oil on the tube side. Oil flow rates and temperatures were varied over a wide range. The data obtained was calculated by the means of existing empirical equations, and the results were compared with those of previous investigators and with the proposed correlations by plotting. The experimentally determined film coefficients obtained on the exchanger when operated as a fin type were found to be in agreement with the best existing correlation. Coefficients determined on the straight tube and shell exchanger were found to be forty per cent higher than the values predicted by this correlation. A comparison was drawn between the exchanger as a fin type and as a shell and tube type. The fin type was found to transfer approximately four hundred per cent as much heat per unit length of exchanger as did the straight shell and tube type. It is believed that a considerable saving would be effected by the use of a fin type exchanger in any application of heat transfer in which one fluid film definitely controlled the rate of heat transfer.

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