130-用于西北地区数据中心的节能冷源技术.pdfVIP

用于西北地区数据中心的节能冷源技术 1 1,* 才华 ，谢晓云 清华大学建筑节能研究中心 摘要：应用于我国西北地区数据中心的冷却，间接蒸发冷却塔可以从原理上解决普通冷 却塔面临的防冻问题，还可以延长自然冷却时间、降低出水温度实现节能。然而单独运行间 接蒸发冷却塔，出水温度会随着外部环境条件的变化而波动，在湿度高的天气下可能无法制 冷。为实现全年稳定可靠地运行，进而拓展其适用的气候区，可将水冷冷机和间接蒸发冷却 塔联合运行。如果进一步将二者结合成小型化一体机，既可解决放置空间不足的问题，又可 实现控制上的便利，还可在工况切换时避免水管结冻风险。本文介绍了这种小型化一体机的 工作原理和运行模式；通过案例分析，得出该系统的节能潜力。如果通过末端的优化设计， 冷冻水温度可进一步提升，便可实现进一步的节能。 关键词：间接蒸发冷却，小型化一体机，工作原理，运行模式 An energy-saving cooling source technology used in data centers in northwest of China By Cai Hua, Xie xiaoyun* Abstract When aiming at data center cooling in northwest of China, indirect evaporative chiller can avoid freezing radically, and meanwhile save energy by expanding natural cooling time and lowering outlet water temperature. However, the indirect evaporative chiller alone cannot achieve stable supplying water temperature due to the fluctuating outside condition. When it occurs to be hot and humid, the indirect evaporative chiller cannot realize cooling. So a combination of indirect evaporative chiller and water-cooled mechanical chiller is a necessity to solve this problem. When combined as miniaturized integrated machines, they can save space and can be easy to control. The way how the machine is integrated can help avoid water pipes freezing when changing operating mode. In this paper, the principles and operating modes of the miniaturized integrated machine are introduced. Through case study, the potential of energy saving are calculated. If high supplying water temperature is feasible through optimizing the terminals, energy can be further saved. Keywords indirect evaporative cooling, miniaturized integrated machine, principle, operating mode 0 引言 随着科技的不断发展，工业、商业、信息交流、社会活动等领域对网络依赖程度不断 提高，人们对数据的计算速度和储存能力的需求急剧增长，数据中心规模不断扩大。数据 中心用能的特点为能量密度高 （未来将会达到8-15 kW/m2 [1] ），增