摘要
为研究空调箱机组的布置、送风距离对于风墙气流组织的影响,建立了采用卧式空调箱机组冷却的数据机房模型。以6SigmaRoom仿真软件分别对4+1、5+1及6+1的风墙空调箱机组配置方案在送风距离15 m及16.8 m时,按照机组全开热备份、中间备机不开、侧边备机不开3种不同运行模式进行气流组织模拟。通过分析模拟得出的温度场发现,在空调箱机组全开热备份运行模式下,3种机组布局方案差异不大,冷通道的温升都在1℃左右;备机不开,则温度场存在明显差异,不同方案温升相差近5℃,机组数量越多,冷通道的最高温度越低,温升越小。模拟得到的流场显示,相同运行模式下,机组数量越多,流线更均匀。就样本数据机房的7+1风墙空调箱机组配置方案分别假设送风距离为9.6 m(单柜发热量20 kW)、12 m(单柜发热量15 kW)、15 m(单柜发热量12 kW)、19.8 m(单柜发热量8 kW)及25.2 m(单柜发热量5 kW)进行气流组织模拟。模拟结果显示,在确保最大送风温升不超过2℃的前提下,送风距离为9.6 m时,风墙的气流组织可以支撑高达20 kW的单机柜发热量;单机柜发热量为8 kW时,风墙的气流组织最远送风距离可达到19.8 m。
In order to study the effects of layouts of Air Handling Units(AHUs) and air supply distances on fanwall airflow distribution,a data hall model cooled by horizontal AHUs is established.Proposals of 4+1,5+1 and 6+1 fanwall AHUs are simulated by 6 SigmaRoom software at the supply air distance of 15 m and 16.8 m.The simulations are respectively carried out under three different operating modes:all units are switched on,the standby unit installed in the middle is switched off,and the standby unit installed in the side is switched off.Through analyzing the temperature fields,it is found that there is no obvious difference among the three proposals under the operating mode that all units are switched on,and the value of all the temperature rises in the cold aisles is about 1 ℃.But there is significant difference under the operating mode that the standby unit is switched off.The maximum differential value of temperature rises of different proposals is nearly 5 ℃;the more the quantity of AHUs is,the lower the highest temperature of cold aisles is,and the smaller the maximum temperature rise is.The flow fields show that,under the same operating mode,the more the quantity of AHUS is,the more uniform the streamlines are.Furthermore,airflow distribution simulations of 7+1 fanwall AHUs proposal are carried out by assuming that the supply air distance is respectively 9.6 m(20 kW per rack),12 m(15 kW per rack),15 m(12 kW per rack),19.8 m(8 kW per rack) and 25.2 m(5 kW per rack).The results of simulations show that,on the premise that the maximum temperature rise of the supply air does not exceed 2 ℃,the maximum heat load of each rack supported by fanwall airflow distribution can be up to 20 kW when the air supply distance is 9.6 m;the farthest air supply distance can reach 19.8 m when the heat load of each rack is 8 kW.
作者
魏赠
肖新文
曾春利
WEI Zeng;XIAO Xin-wen;ZENG Chun-li(Stulz Air Technology and Services Shanghai Co.,Ltd.,Shanghai 201108,China)
出处
《建筑节能（中英文）》
CAS
2022年第3期124-129,共6页
Building Energy Efficiency
关键词
数据中心
风墙
空调箱机组
气流组织
CFD模拟
负载密度
机组布局
送风距离
data center
fanwall
Air Handling Unit(AHU)
airflow distribution
Computational Fluid Dynamics(CFD)simulation
load density
layout of AHUs
air supply distance
