Mechanical Design and Analysis of Shell and Tube Type Flxed Tube Sheet Heat Exchanger

Abstract

Heat exchangers are widely used in process industries. As these devices subjected to high pressure and temperature,it is necessary to design their key parts with special care. Under di erent loading conditions higher stresses will generate at the areas of discontinuity in the geometry. Most cases the area subjected to higher stresses are regions like shell to nozzle, shell to saddle and shell to head junctions. These higher stresses regions may a ect the e ciency of the heat exchanger and may lead to dangerous results sometimes.These being a weakest part it is highly recommended to design and analyze them with proper precautions. No literature highlights a stan- dard procedure for such type of crucial parts analysis. The aim of the present work is to mechanically design and analyze the weak shell to nozzle junction of shell and tube type xed tube sheet Heat Exchanger. This task is carried out by doing a theoretical calculation and making model in PV Elite.Thickness of shell,head,nozzle etc.and stresses are obtained which is helpful in making 3D model of Shell to nozzle junction and subsequent nite element analysis of shell and tube type xed tube sheet heat exchanger.Results obtained from theoretical calculations and analysis performed is within the permissible limits and variations are not ex- ceeding more than five percentage.This shows that the adopted procedure gives the satisfactory results.