Optimized Numerical Simulation And Field Synergy Principle Analysis On The Distribution Area Of Plate Heat Exchangers

Plate heat exchanger is a high-efficiency device of heat transfer, which canachieve the heat transfer from high temperature fluid to low temperature fluid. Plateheat exchanger is applied in many fields such as machinery, petroleum, chemicalengineering, food and so on, for it has many advantages such as small heat loss andeasy maintenance. And researchers from many countries attach great importance tothe study of plate heat exchanger.In this paper, a calculation model A contains flow and heat transfer of BR0.015Ftype plate heat exchanger was build which include cold and hot double flow channel.And based on the structure modification of its distribution area, a new model B wasestablished. Fluid flow and heat transfer were simulated by computational fluiddynamic software，and the results are compared with the experimental results. Themain research contents of this thesis are as follows.1. The diagonal-side flow was simulated in the two models, and compared thetwo models of velocity field, temperature field and pressure field, by analyzing theNusselt number and friction faction, the results shows that under the same conditions,the Nusselt number of the new model is approximately equal to the original model,the friction factor is reduced by30%than that of the original model, PerformanceEvaluate Criteria is about1.1times of the original model, the overall performance isobviously enhanced compared with the original model.2. The single-side flow was simulated in the two models, and compared the twomodels of velocity field, temperature field and pressure field, by analyzing theNusselt number and friction faction, the results shows that under the same conditions,the Nusselt number of the new model is approximately equal to the original model,the friction factor of model B is larger than model A, he overall performance is equalto the original model. 3. By using the UDF, the angel of the velocity field and temperature field, andthe angel of the velocity field and pressure field were simulated. Based on fieldsynergy theory, the result was considered and shows that a consistent relationship isshown when the traditional evaluation criteria of heat transfer and the field synergyprinciple are all used to optimize the heat exchanger. Under the same conditions, theangel of the velocity field and temperature field in model A is same to the model B,but the angel of the velocity field and pressure field in model B is smaller than modelA.