Analysis Of Influence Of Heat Exchanger Plate Structure And Process Parameters On Molding Quality Based On Finite Element Technology

Plate heat exchanger has the advantages of compact structure,convenient installation and high heat transfer efficiency,and has been widely used in aerospace,petrochemical and other industries.Plate is an important part of plate heat exchanger.The shape and structure parameters of plate affect not only the quality of sheet stamping,but also the heat transfer rate and fluid resistance of heat exchanger.Therefore,the research on the structure shape and parameter design of plate heat exchanger has become one of the important research topics in the field of plate heat exchanger design and manufacturing technology.In this paper,a comprehensive use of finite element analysis technology,elastoplastic theory,fluid mechanics theory and optimization technology,aiming at the structural parameters and process parameters of heat exchanger sheet on sheet stamping molding quality,heat exchanger heat transfer rate and fluid resistance and other issues to carry out research work,the main research work of the paper is as follows:1.The influence of the plate structure parameters of heat exchanger(corrugated Angle,corrugated depth,corrugated phase pitch)on the sheet forming thinning rate is as follows:The corrugated depth > the corrugated Angle > the phase pitch of the corrugated method.At the same time,the stress and strain state of the sheet after stamping molding is studied and analyzed.The main weak part of the sheet after stamping molding is in the corrugated Angle of the heat exchanger sheet.2.According to the actual plate heat exchanger model provided by the enterprise,the orthogonal optimization method is used to minimize the sheet forming reduction rate as the goal,the parameter corrugated Angle,the depth of the ripple and the phase pitch of the ripple as variables,and the optimization analysis is carried out on the design parameters of the sheet structure,and the main influencing parameter of sheet stamping is the depth of the ripple.And the optimal parameter combination of sheet stamping is obtained: the Angle of ripple is 40°,the depth of ripple is 2mm,and the phase pitch of ripple is 12 mm.3.According to the actual plate heat exchanger model provided by the enterprise,using the knowledge of fluid mechanics and the theory of heat transfer,the optimal parameter combination of the heat transfer performance of the plate heat exchanger is obtained: the Angle of the ripple is 50°,the depth of the ripple is 4mm,and the phase pitch of the ripple is 10 mm.At the same time,taking the sheet forming reduction rate,heat transfer coefficient and flow resistance coefficient as the objectives,and the parameter corrugated Angle,corrugated depth and corrugated phase pitch as variables,the multi-objective optimization analysis of the sheet structure design parameters was carried out.The optimal parameter combination of comprehensive stamping and heat transfer performance was obtained as follows: corrugated Angle 50°,corrugated depth 3mm,corrugated phase pitch 10 mm.Through the analysis,we can see that when considering the heat exchanger performance of different emphases,the heat exchanger structure parameters are also different,so in the heat exchanger plate design need to give overall consideration.The research results of this paper provide necessary reference for the development and manufacture of new products of heat exchanger plate in enterprises.