铁路“四电”机房相变应急控温装置结构优化研究  

Study on Optimization of Phase Change Emergency Temperature Control Device for Four Major Electrical Rooms of Railway

作　　者：付雷 邓志辉[1] 袁艳平[1] 曹晓玲[1] 周森林 王晶 曾超[1] Fu Lei;Deng Zhihui;Yuan Yanping;Cao Xiaoling;Zhou Senlin;Wang Jing;Zeng Chao(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031;Jiangsu Jianwei Protection Engineering Technology Co.,Ltd,Yangzhou,225826)

机构地区：[1]西南交通大学机械工程学院,成都6100031 [2]江苏坚威防护工程科技有限公司,扬州225826

出　　处：《制冷与空调（四川）》2022年第2期220-226,共7页Refrigeration and Air Conditioning

基　　金：四川省科技计划项目(2021YFG0271);中央高校基本科研业务费专项资金资助(2682020CX32);江苏省科技项目(BE2019090)。

摘　　要：“四电”机房常年运行,设备发热量大,而在一些特殊地区,无法随时满足空调设备电力供应,需要相变应急控温装置这类无源空调设备来降低机房内温度,延长电子设备工作时间及寿命。为相变应急控温装置能大规模使用且保持不错的性能,在装置控温性能与其制造成本之间取得平衡,利用Ansys-Fluent建立数值模型并实验验证了模型和计算方法的正确性,模拟计算了不同结构下装置的控温性能。结果表明:无量纲翅片高度H=6时,可在传热强化与制造成本之间取得平衡,再增加无量纲翅片高度所增加的传热收益将显著降低;内外径比例变化对控温效果及制造成本的影响远大于内径尺寸变化对其的影响;较小的内径尺寸和内外径比例的控温单元拥有较好的控温效果及较高的成本;单元内径为17mm,内外径比为1:3,横向间距111mm,纵向间距128mm时,装置可以最小成本达到控温要求。The four major electrical rooms run all the year round and generate a lot of heat.However,in some special areas,the power supply of air-conditioning equipment can not be met at any time.Passive air-conditioning equipment such as phase change emergency temperature control devices are needed to reduce the temperature in the rooms,extend the working time and life of electronic equipment.For the purpose of large-scale operation and good performance of the phase change emergency temperature control device,a balance between the temperature control performance of the device and its economy is achieved,in this paper,a numerical model is established by ANSYS FLUENT,and the temperature control effects of the device under different structures are simulated and calculated.The results show that the balance between heat transfer enhancement and economy can be obtained for a dimensionless fin height of H=6,and the heat transfer gain from increasing the dimensionless fin height will be significantly reduced;the effect of changing the inner and outer diameter ratio on the temperature control effect and economy is much greater than the effect of changing the inner diameter size;the temperature control unit with smaller inner diameter size and inner and outer diameter ratio has better temperature control effect and poorer economy;when the inner diameter of the unit is 17mm,the ratio of inner diameter to outer diameter is 1:3,the horizontal spacing is 111 mm,and the longitudinal spacing is 128 mm,the device can achieve temperature control effect and economic balance.

关 键 词：“四电”机房 相变 应急控温 传热优化 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]