挡板对数据中心热环境影响的模拟研究

Simulation of the influence of baffle in plenum on air distribution in data center

针对数据机房高架地板下静压箱内送风压力不平衡导致地板格栅送风不均匀而引起机柜过热的问题,以某大型数据中心内气流组织为研究对象,采用6SigmaRoom软件进行数值模拟,求解获取地板静压箱内架设挡板时数据中心内机柜进口温度分布,温度场分布和不同高度平面的速度场分布,进而对比静压箱架设挡板末端不同高度对数据中心内机柜最大进口温度的影响,最后运用供热指数(SHI)、回热指数(RHI)、机架冷却指数(RCI)和回风温度指数(RTI)详细分析其优劣。研究结果表明:静压箱架设挡板能改善数据中心的气流组织,且架设的挡板末端越高,其节能程度越高。与未架设挡板的数据中心相比,静压箱挡板末端为0.56 m时SHI降低43.1%,静压箱中压力分布更均匀,可有效解决数据中心近空调端机柜过热的问题。

In order to solve the problem of cabinet overheating caused by uneven air supply from floor grills due to the unbalanced air pressure in the plenum under the elevated floor of the data center,numerical simulations were carried out using 6 SigmaRoom software focusing on the air distribution.The temperature distribution,temperature field distribution and velocity field distribution at different height planes of the cabinet in the data center were obtained when the baffle was installed in the plenum under the floor.The influence of different heights at the end of the baffle on the maximum inlet temperature of the cabinet in the data center was analyzed.The advantages and disadvantages by using baffle were presented in detail using supply heat index(SHI),return heat index(RHI),rack cooling index(RCI)and return air temperature index(RTI).The results show that the baffle improves the air distribution of the data center.The higher the baffle end is,the more the energy savings are.Compared with the data center without baffle,when the baffle end is 0.56 m,the SHI decreases by 43.1%.The pressure distribution in the plenum is more uniform,which effectively solves the overheating of the cabinet near the air conditioner in the data center.