Structure Optimization Of The Liquid Cooling Radiator Of Megawatt Wind Turbine Converters

Currently,due to energy shortages,wind power technology has developed rapidly,and the power of wind power converter has also been greatly improved,which lead to high temperature of converter,which affect the stability of the system seriously.This thesis is to optimize the cold plate of cooling device of megawatt wind power converters and obtain a superior performance cold plate structure,through 6 kinds of cold plate structure designed and 3 kinds of cold flow channel parameter optimization measures,and the Webb-Bergles performance evaluation method of cold plate.The research of this thesis is aimed at optimizing the design of wind power converter cold plate.The content of my tasks are as follows:Firstly,the background and significance of the research is demonstrated,and the research status of the cold plate technology at home and abroad is analyzed.Researchs of the movement of the viscous fluid and others basic theory of cold plate design are carried out.Then the performance parameters of the cold plate have been calculated.Secondly,the effects of the performance of the cold flow channel made by its structure differences has been studied.Six kinds of cold plate structure such as pseudo-parallel and S-type are simulated in ICEPAK simulation software.Through analysis and comparison of the simulation results,the advantages and disadvantages of various cold plate structure have been summarized.Thirdly,the integrated performance evaluation of cold plate has been considered.Through comparing and analyzing several commonly used index of enhanced heat transfer,a comprehensive performance evaluation index based on the Webb-Bergles method of cold plate has been established.As a result,one optimum performance structure called pseudo-parallel has been obtained.Finally,the performance of cold flow channel effected by its structure parameters has been studied.The performance of the cold plate has been further enhanced by optimal simulation of size,subsidiary structure,cross-sectional area of the pseudo-parallel structure.