温湿度独立控制空调系统在数据中心的应用研究
Research on application of temperature and humidity independentcontrol air conditioning systems to data centers
摘要：
通过分析数据中心空调冷负荷的构成及补风特点,提出了适用于数据中心的温湿度独立控制空调系统。温度控制由室内精密空调机组完成,承担IT设备和照明的冷负荷;湿度控制由独立新风机组完成,承担围护结构和新风的冷负荷。介绍了数据中心温湿度独立控制空调系统的示意图、夏季和冬季空气处理过程在焓湿图上的表示及其能量分析,并与常规空调系统进行比较。针对某设定数据中心进行了模拟计算比较,5个热工气候区10个城市的模拟结果表明:相比数据中心常规空调系统,温湿度独立控制空调系统兼具节能性和节水性,节能率达7.5%以上,而节水率达32%以上。
Abstract：
By analysing the composition of cooling loads and ventilation characteristics in data center air conditioning systems, this paper presents a temperature and humidity independent control air conditioning system suitable for data centers. The temperature control is achieved by the indoor precision air conditioning unit handling cooling loads from IT equipment and lighting. The humidity control is managed by a dedicated outdoor air unit addressing cooling loads from the building envelope and outdoor air. This study describes schematic diagrams of the temperature and humidity independent control system, illustrates its summer/winter air handling processes on psychrometric charts, conducts energy analysis, and compares it with conventional systems. Simulation and comparisons are performed for a specified data center. The results from 10 cities across 5 thermal climate zones demonstrate that compared with conventional data center air conditioning systems, the temperature and humidity independent control system achieves both energy and water conservation, with an energy saving rate exceeding 7.5% and a water saving rate surpassing 32%.
Keywords:data center; temperature and humidity independent control; air conditioning system; indoor precision air conditioning; independent outdoor air; energy saving; water saving