变频空调器电子元器件板肋式散热器仿真与优化

Simulation and optimization on plate-fin radiators for electronic components of frequency conversion air conditioners

电子元器件散热困难导致变频空调机组运行异常,为解决此问题,采用Fluent对电子元器件板肋式散热器及其周围空气流场的流动和传热特性进行了模拟研究。建立了仿真计算模型,并与实验参数进行了对比,仿真计算误差不超过10.8%。对原型散热器肋片进行了结构模拟研究,结果显示,在低风速散热环境下,单向长肋片板肋式散热器尾端的空气流量小、温度高,散热效果较差。提出了一种新型板肋式散热器形式,采用多段肋片、错向肋片结构,散热效果得到较大提升。原型散热器经优化后,各元器件温度降低2.8~4.6℃,优化率约为3.2%~5.5%。

At present,China’s ultra-low energy buildings are mainly distributed in cold zone such as Beijing,Tianjin,Hebei,Henan and Shandong,and a few projects are in hot summer and cold winter zone.In fact,ultra-low energy consumption buildings have great benefits in severe cold zone.Due to the long and extreme cold winter,the requirements for thermal insulation performance would be higher.The severe cold climate condition would also be a challenge to the performance of doors and windows,the performance of equipment systems,and the safety of thermal insulation installation.So far,there are rarely large scale ultra-low energy consumption residential groups in severe cold zone.Regarding to the technical difficulties faced in the region,effective solutions are urgently needed for the industry.Taking the Zhonghai Heshandaguan project as an example,figures out the design essentials of ultra-low energy consumption residential projects in severe cold zone,including the design of envelope insulation,external windows,thermal bridges,air tightness,cold and heat source systems,and renewable energy applications,etc.Carries out a comprehensive analysis of the operating data of the case project,and evaluates the effect of the implementation of ultra-low energy consumption technical measures.The research results can provide technical reference for the large-scale implementation of ultra-low energy consumption building projects in severe cold zone in the future.