摘要
本文针对具有相变冷却方式的光伏直驱冷水机组的变频器搭建实验系统,研究散热性能,并优化设计。实验系统由水系统、供电系统组成,供电系统包括光伏模拟电源、电网。实验使变频器产生不同发热状况,结果表明,在500 k W空调运行模式中,整流模块稳定在45.0℃;520 k W光伏发电模式中,冷却输出无法匹配负荷变化速率,整流模块温度在23.2℃~57.3℃波动,缩短调节周期后温度稳定在42.0℃;在低功率运行中,冷却输出能力过大、柜内露点温度高使模块温度低于13.0℃并发生凝露,采取提高除湿能力、限制冷却输出措施后未发生凝露。优化后的设计将提高变频器冷却性能。
The experiments on phase change cooling system of photovoltaic（PV） direct-drive centrifuge chiller converter were performed; in which heat dissipation performance was analyzed, and the design was optimized. The experiment system is composed of water system and power supply system which includes photovoltaic analog power facility and power grid. In experiments, the converter gets different fever conditions. The results show that, the rectifier module temperature is 45.0 ℃ when the chiller operates air-conditioning mode with 500 kW. When the chiller operates PV generate mode with 520 kW, the cooling output cannot match the variation rate of fever, and the rectifier module temperature varies in the region of 23.2 ℃～57.3 ℃. After decreasing control period, the rectifier module temperature is stable at 42.0 ℃. When the chiller operates with low power, due to high cooling output and dew point temperature, the module temperature is lower than 13.0 ℃ and the condensation occurs. Condensation will be removed by improving dehumidification capacity and limiting cooling output. The optimized design will improve the cooling system performance of converter.
作者
黄童毅
周卫华
黄千泽
何林
张威
HUANG Tongyi;ZHOU Weihua;HUANG Qianze;HE Lin;ZHANG Wei(-GREE Electric Appliances,INC.Zhuhai,Guangdong 519070,China;-SKL of Air-Conditioinng Equipment and System Energy Conservation,Zhuhai,Guangdong 519070,China)
出处
《制冷技术》
2018年第3期24-30,共7页
Chinese Journal of Refrigeration Technology
关键词
相变冷却
变频器
光伏直驱
离心式冷水机组
冷却性能
Phase change cooling
Converter
Photovoltaic direct-drive
Centrifuge chiller
Cooling performance
