Shell & Tube Type 열교환기의 전산지원설계에 관한 연구

A Study on the Computer Aided Design of Shell & Tube Type Heat Exchanger

Up to now, the shell and tube type heat exchanger are applied as a typical heat exchanger in power plant and refinery system. It is very difficult to calculate the expected performance characteristics of the shell and tube type heat exchanger, because there are many design parameters to be considered according to internal structure and the shell side heat transfer mechanism complicatedly related to the design parameters. Design parameters to be considered in the design stage of the shell and tube type heat exchanger are shell and tube side fluids, flow rate, inlet and outlet temperature, physical properties, type of heat exchanger, outer diameter, thickness, length of tube, tube arrangement, tube pitch, permissive pressure loss on both sides, type of baffle plate, baffle plate cutting ratio, clearance between baffle plate outer diameter and shell inner diameter, clearance between baffle plate holes and tube outer diameter. The basic purpose of this study is to develop a computer aided design program reflecting the characteristics of parameters. Finally, overall heat transfer coefficient and pressure drop calculated by the developed computer program were reviewed as per experimental data and in addition to that, relation between overall heat transfer coefficient and fouling resistances & film coefficients of shell and tube sides was simulated.