【摘要】 为了满足大功率电力电子器件日益增长的冷却需求,本文提出了一种自然循环沸腾冷却系统,其利用相变过程实现高效冷却,并采用自然循环方式驱动冷却介质。基于两相流动与传热的理论基础,建立了均相流系统仿真模型,并以大功率电力电子器件的典型代表换流阀为例,进行了换流阀自然循环沸腾冷却系统设计。在此基础上,搭建了换流阀自然循环沸腾冷却系统实验平台,开展不同变量下换流阀自然循环沸腾冷却试验。仿真和实验结果表明:均相流模型能够准确地反映系统两相流动过程,所设计的自然循环沸腾冷却系统的温控效果具有可实施性。更多还原

【Abstract】 In order to meet the increasing cooling demand of high-power power electronic devices,this paper proposes the natural circulation boiling cooling system.This system utilizes phase change process for efficient cooling and uses natural circulation to drive the cooling medium.Based on the theoretical basis of two-phase flow and heat transfer,a homogeneous flow system simulation model is established.The typical representative converter valve of high-power power electronic device is taken as an example to design the natural circulation boiling cooling system of the converter valve.On this basis,the experimental platform of the natural circulation boiling cooling system of the converter valve is built.The simulation and experimental results show that the homogeneous flow model can accurately reflect the two-phase flow process of the system,and the temperature control effect of the natural circulation boiling cooling system is implementable.更多还原