大容量電力変換装置向け自然循環冷却システムの熱伝達・流動特性

抄録

In recent years, with a large-capacity power conversion device, it is required to consolidate and cool the power modules due to restrictions on installation environment and installation space. The problem is temperature leveling in the large heat transfer area. The purpose of this development is to establish a highly efficient natural circulation cooling system utilizing boiling cooling in the large heat transfer area. Operation verification with a simulator of 2 MW level was carried out using HFE-7200 as a working fluid, and pressure dependence of heat transfer characteristics and flow characteristics was clarified.