Heat Transfer Analysis And Optimization Of Variableparameter Fin Heat Sinks Based On Thermoelectric Cooler

As a new refrigeration technology,Thermoelectric cooler has the advantages of small volume and no pollution in practical application,so it has a very broad application prospect.In the existing technology,the method of improving the cooling efficiency of thermoelectric cooler by increasing the material quality coefficient progresses relatively slowly,so at the present stage,the practical application mainly improves the cooling performance of thermoelectric cooler system indirectly by improving the heat dissipation efficiency of the hot end of the thermoelectric refrigeration.Therefore,this paper explores the improvement of the thermal end cooling efficiency of the thermoelectric cooler to improve the cooling performance of it,and studies the working state and geometric parameters of the fin heat sink which is at the hot end of the thermoelectric cooler under forced flow.The specific research contents are as follows:1)The control variable method was adopted in this paper to analyze the installation mode of the cooling fan,the wind speed of the cooling fan and the spacing of the heat sinks,and the accuracy of numerical model simulation results was verified through experiments.The results demonstrated that among the six fan installation modes of the common rectangular fin heat sink,the best installation mode is the single fan with one side blowing,and the best wind speed is 5m/s and the best fin spacing is5 mm.2)Based on the theory of generalized Newton’s law of viscosity,this paper designs five fin heat sinks with different vertical cross-section shapes,and explores the influence of fin cross-section shapes on the heat dissipation performance of the heat sink at a fixed wind speed.It is found that under the same conditions,the triangular fin heat sink has the best heat dissipation effect,and its material loss is also absolutely superior to the five fin types studied.Then we obtained the fin spacing range-[2mm,6mm] by comparative study,in which the heat dissipation of the triangular fin heat sink is better than that of the ordinary rectangular fin heat sink.3)Based on Matlab platform,the heat resistance and quality of the heat sink are taken as the optimization objectives,and the multi-objective optimization of the triangular fin heat sink is carried out based on genetic algorithm.Finally,three kinds of triangulated fin heat sinks with different weights and their corresponding performance and structural parameters were obtained by TOPSIS method.4)In order to verify the performance accuracy and superiority of the optimization model,this paper obtains the test data of the ordinary rectangular fin heat sink and that of the three optimization models under certain experimental conditions.The accuracy and superiority of the optimization model was verified by collating and comparing the data.The test results show that the optimized model with the weight of(0.5,0.5)improves the performance of the heat sink by 15.31% and reduces the material loss by42.35% compared with the conventional rectangular fin heat sink under the same conditions.The research results of this paper have certain reference significance for the subsequent scholars to continue their research in this field and for the selection of fin heat sink or the operating parameters of the cooling system in actual engineering projects.