Design Optimization Of Shell-and-tube Heat Exchanger And Research On Performance Of The Appropriate Operational Zone

Heat exchangers are one of the most important chemical equipments in all kindsof production equipments, which are widely applied in chemical industry, thepetroleum chemical industry, the pharmaceutical industry, the metallurgical industry,the refrigerating industry, the light industry etc. The heat exchanger has various typesand can be divided into dividing wall type, hybrid and heat accumulating type,According to the heat transfer theory and the pattern of heat exchanges. Each type hastheir own advantages and disadvantages. The shell-and-tube heat exchanger is one ofthe most widely used heat exchangers which belongs to the dividing wall type inpractical applications. How to design a heat exchanger which features little investment,low energy consumption, high heat transfer efficiency and easy measures for examinesand repairs according to different craft production process and the scale of productionhas very vital significance to designers. In terms of designers in the petrochemicalindustry, the first and foremost task is to target on specific operating conditions andselect the most suitable heat exchanger so that we can reduce the investment andoperation cost and get the maximum economic benefit.In this text, I wrote a software about the calculation of shell-and-tube heatexchangers with Visual Basic6.0software and did the design calculation of the heatexchangers according to a certain working condition, To find the optimal operating regionof the heat exchanger also the calculated result are compared with a famous heatexchanger calculation software Xchanger Suite xist.Then we discussed the inputgeometric parameter of the heat exchanger tube and shell parts process and madejudgments of the tube and shell process flow velocity, pressure drop, heat transfer area margin and so on in order to find the best operating conditions of the heat exchanger.This article in accordance with the tube shell heat exchanger tube side, shell sideof the minimum and maximum flow rate, in accordance with the maximum allowablepressure drop in accordance with the process of shell and tube flow rate to determinethe minimum flow rate based on the shell side fluid in a turbulent state. First，proposedthe concept of the operation region of the stability region of the heat exchanger, and todetermine the range of optimal operating region.