藏区数据中心蒸发冷却与余热回收系统应用探讨
摘要:近年来,藏区数据中心产业发展迅速,其能耗和全年产生的热量亦大规模增长。为提高数据中心能源利用效率,本文以西藏拉萨市某数据中心为研究对象,通过对其一期工程空调系统进行实测分析,建议在二期工程建设中采用热回收型蒸发冷却空调系统。采用焓差实验室模拟藏区室外条件,对机组性能进行了测试,并针对系统的节能性和经济性进行了计算分析。结果表明:该机组蒸发冷却模式下填料最佳淋水密度为1 800 kg/(m2·h),最佳运行风速为2.4 m/s;虽然藏区低大气压力有利于提高机组直接蒸发冷却效率,但机组实际制冷量受到较大影响。机组热回收模块的实验测试结果表明,在机房机柜装机率为100%时,热回收量最高可达264.78 kW,具有显著的节能性和经济性。
关键词:藏区数据中心直接蒸发冷却余热回收节能性分析
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[3] 宋姣姣,黄翔,范坤,等.蒸发冷却-机械制冷空调机组现场测试与性能分析[J].暖通空调,2014,44(9):47- 50.
[4] 郭志成.新疆某数据中心自然冷却空调系统的应用研究[D].西安:西安工程大学,2019:14- 15.
[5] 陈丽媛,黄翔.蒸发冷却技术在“一带一路”沿线的国家的适用性[J].西安工程大学学报,2016,30(5):596- 602.
[6] 袁洪.数据中心空调节能技术的应用与研究[J].低碳世界,2022,12(7):118- 120.
[7] 肖新文.间接蒸发冷却空调机组应用于数据中心的节能分析[J].暖通空调,2019,49(3):67- 71.
[8] 刘凯磊,黄翔,杨立然,等.蒸发冷却空调系统在数据中心的应用实验[J].暖通空调,2017,47(12):124- 130.
[9] 田振武,黄翔,褚俊杰,等.干燥地区数据中心水侧蒸发冷却空调系统的实测分析[J].暖通空调,2021,51(8):12- 17.
[10] DUAN Z Y.Investigation of a novel dew point indirect evaporative air conditioning system for buildings [D].Nottingham:University of Nottingham,2011:117- 118.
[11] DUAN Z Y,ZHAN C H,ZHAO X D,et al.Experimental study of a counter-flow regenerative evaporative cooler [J].Building and environment,2016,104:47- 58.
[12] 吕萌萌,陈静,王芳.数据中心余热利用系统方案设计与应用[J].建设科技,2019(12):55- 57.
[13] 罗玉庆.大型数据中心余热回收利用节能研究[J].节能,2019,38(8):46- 48.
[14] 崔科,赵进良,付晓飞.数据中心空调冷却及余热回收系统技术分析[J].节能技术,2020,38(4):379- 384.
[15] 李国柱,崔美华,黄凯良,等.数据中心余热利用现状及在建筑供暖中的应用[J].科学技术与工程,2022,22(26):11287- 11295.
[16] 李金苡.浅谈利用济南某数据中心余热的供暖方式[J].建筑热能通风空调,2021,40(9):64- 67.
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Discussion on application of evaporative cooling and waste heat recovery systems to Tibetan data centers
Abstract: In recent years, the data center industry in Tibetan area has developed rapidly, and its energy consumption and annual heat generation have also increased on a large scale. In order to improve the energy utilization efficiency of data centers, this paper takes a data center in Lhasa, Tibet as the research object, and through the actual measurement and analysis of the air conditioning system of the first phase of the project, it is proposed to adopt the heat recovery type evaporative cooling air conditioning system in the construction of the second phase project. The enthalpy difference laboratory is used to simulate the outdoor conditions in the Tibetan area, the performance of the unit is tested, and the energy saving and economy of the system are calculated and analysed. The results show that the optimal water filling density is 1 800 kg/(m2·h) under the evaporative cooling mode of the unit, and the optimal operating wind speed is 2.4 m/s. Although the low atmospheric pressure in Tibetan area is beneficial to improve the direct evaporative cooling efficiency of the units, the actual cooling capacity of the units is greatly affected. The experimental test results of the heat recovery module of the unit show that when the installation rate of the cabinet in the computer room is 100%, the maximum heat recovery capacity can reach 264.78 kW, which has significant energy saving and economy.
Keywords: Tibetan area; data center; direct evaporative cooling; waste heat recovery; energy saving analysis;
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