基于热环境评价指标的数据中心冷通道封闭机房气流组织研究

Air distribution of computer rooms with closed cold aisles in data centers based on thermal environment evaluation indexes

选取某冷通道封闭机房为实测对象,验证了CFD模拟结果的准确性。利用CFD模拟软件对冷通道封闭前后机房的气流组织进行了模拟,通过7种热环境评价指标定性及定量分析了模拟结果。研究表明:冷通道未封闭的机房存在冷气流短路、热气流回流、冷通道纵向空气温度分层等现象;冷通道封闭后,冷气流集中、冷热掺混现象改善,局部热点消除。地板出风量表现相近,机柜冷却指数低值表现稍差,可通过提高空调回风温度以优化指标并达到节能目的;机柜进风温度、冷通道纵向温度分布、地板送风流线、供热指数、机柜冷却指数高值这5项指标在冷通道封闭后大为改善。

Selects a typical computer room with closed cold aisles as an actual measurement object to verify the accuracy of CFD simulation.Simulates the air distribution of the computer room with closed cold aisles and without closed cold aisles by CFD simulation software,respectively.Qualitatively and quantitatively analyses the simulation results with seven evaluation indexes.The results show that there exists the phenomenon of short circuit of cold air,return flow of hot air and air temperature longitudinal stratification of cold aisle side in the computer room without closed cold aisles.After enclosing cold aisles,concentration of cold air flow and mixing of cold and hot airflow are both improved,without the local hot spots.The performance of floor air output is similar,and the low temperature value of cabinet cooling index is slightly poor,which can be improved by increasing return air temperature of air conditioning to save energy.Supply air temperature of cabinet,air temperature longitudinal stratification of cold aisle side,supply air flow line of floor,heating index and high temperature value of cabinet cooling index are obviously improved by enclosing cold aisles.