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Abstract

This paper presents a simple but accurate method to calculate shell side heat transfer coefficient in a single segmental shell and tube heat exchanger. The method is based on a chart which is a product of actual data taken over a span of several years. The calculation procedure is presented with a case study. The results are compared with known methods and commercial/proprietary computer codes prevalent in the industry. The results from this method compare well with HTRI computer program. This method can prove to be a helpful tool for design engineers in the field.

Keywords: Shell and tube exchanger; Single phase; Heat transfer coefficient

Abstract

In a computer-based design, many thousands of alternative exchanger configurations may be examined. Computer codes for design are organized to vary systematically the exchanger parameters such as, shell diameter, baffle spacing, number of tube-side pass to identify configurations that satisfy the specified heat transfer and pressure drops. A computer-based design model was made for preliminary design of shell-and-tube heat exchangers with single-phase fluid flow both on shell and tube side. The program covers segmentally baffled U-tube, and fixed tube sheet heat exchangers one-pass and two-pass for tube-side flow. The program determines the overall dimensions of the shell, the tube bundle, and optimum heat transfer surface area required to meet the specified heat transfer duty by calculating minimum or allowable shell-side pressure drop.