蒸发冷却/凝与热管复合型空调技术在数据中心的应用

Application of evaporative cooling/condensing and heat pipe combined air-conditioning technology to data center

调研蒸发冷却技术在数据中心应用情况,并分析几种蒸发冷却与蒸气压缩制冷系统复合型空调系统,结果表明:直接蒸发冷却无法保证空气品质,在数据中心应用受限,间接蒸发冷却可以很好地与蒸气压缩制冷系统分别在蒸发侧及冷凝侧复合,现有空气侧复合型蒸发冷却系统可利用自然冷源的室外空气湿球温度达到21.8℃,自然冷源利用率高,但存在系统体积大、风阻大的缺陷;水侧复合型蒸发冷却系统可利用自然冷源的室外空气湿球温度达到15℃,但系统成本较高;采用冷冻水末端的带蒸发冷却/凝的热管复合型空调系统存在中间二次换热问题,可利用自然冷源的室外空气湿球温度达到13℃;采用制冷剂末端的带蒸发冷却/凝的热管复合型空调系统可利用自然冷源的室外空气湿球温度达到19℃,适用于数据中心全年制冷.

The application of evaporative cooling technology to data center is investigated and researched. And several types of evaporative cooling and vapor compression refrigeration combined air-conditioning system are analyzed. The results show that the direct evaporative cooling can not guarantee the air quality,and its application in data center is limited. The indirect evaporative cooling can be well combined with the vapor compression refrigeration system on evaporation side and condensation side. The maximum outdoor air wet-bulb temperature of natural cold source that can be used in existing air-side composite evaporative cooling system reaches 21.8 ℃,and the utilization rate of natural cold source is high,but the system volume is big and wind resistance is large. The maximum outdoor air wet-bulb temperature of natural cold source that can be used in the water-side composite evaporative cooling system reaches 15 ℃,but the system cost is higher. The evaporative cooling/condensing and heat pipe combined air-conditioning system with terminal of chilled water has the problem of secondary heat transfer,and the maximum outdoor air wet-bulb temperature of natural cold source that can be used reaches 13 ℃. For the evaporative cooling/condensing and heat pipe combined air-conditioning system with terminal of refrigerant,its maximum outdoor air wet-bulb temperature of natural cold source that can be used reaches 19 ℃,which is very suitable for data center refrigeration all the year round.