Heat Exchanger Structure Design For High Heat Transfer Efficiency

Heat exchangers are indispensable and important equipment in many industrial fields.Their function is to provide heating and temperature control for production lines of petroleum,chemical,pharmaceutical and other enterprises,thereby improving the production efficiency and quality level of products.In this paper,structural innovation,scheme design,single / multi-objective size optimization and test verification are carried out on the spiral baffle heat exchanger,so as to design a heat exchanger for high efficiency and give a specific structure size scheme.This paper first studies the heat transfer process and numerical simulation of the heat exchanger,and verifies the correctness of the simulation results through experiments.According to the principles of heat transfer,the heat exchange process and mathematical description of the heat exchanger are analyzed,and based on Fluent software,the simulation model flow channel is extracted,the material properties are set,the fine mesh is divided,and the simulation environment is built.The simulation model is tested and verified,and the simulation data and the simulation data error of the surface heat transfer coefficient and the shell side pressure drop are compared to verify the accuracy of the simulation model.Secondly,the design and qualitative analysis of the new spiral baffle heat exchanger.The influence of the number and shape of spiral baffles on the heat exchange performance of the heat exchanger is analyzed,and on this basis,a new type of spiral baffle heat exchanger is designed,and the new spiral baffle heat exchanger is derived through mathematical derivation Modeling formula,summarize the selection basis of important combination parameters such as heating tube layout and lap degree,and explore the influence law of inlet mass flow v,helix angle ?,bending angle ? on heat exchanger performance.The structure of the new spiral baffle heat exchanger was analyzed,and the quantitative results of the optimal combination of structure and process parameters were given.The inlet mass flow v,the spiral angle ?,and the bending angle ? are the three design variables,and the surface heat transfer coefficient and shell-side pressure drop are used as the evaluation indicators for the selection of spiral baffle heat exchangers for multi-objective optimization;The performance is to select the evaluation index of the spiral baffle heat exchanger for single-objective optimization.Finally,the heat transfer effects and their respective advantages and disadvantages of the three types of spiral baffle heat exchangers are comprehensively analyzed.Through the establishment of single-objective,multi-objective structure optimization and optimization of the new spiral baffle heat exchanger and 3-point spiral baffle heat exchanger simulation model,from the streamline distribution,surface heat transfer coefficient,shell side pressure drop,synthesis Comparison of performance,baffle surface temperature and other aspects proves the high heat transfer efficiency of the new spiral baffle heat exchanger.The spiral baffle heat exchanger design ideas,size determination schemes and heat exchange heat transfer laws used in this paper have important reference significance for the structural innovation,design schemes and solving algorithms of other similar products of heat exchangers.