泵驱动两相冷却机组及其节能效果实验研究

Experimental Investigation on a Pump-driven Two Phase Cooling Unit and Its Energy Saving Effect

当气温较低时,泵驱动两相冷却机组较之传统的蒸气压缩式空调能耗更低,EER更高,在数据中心节能降耗方面具有很大的应用潜力。但粗糙的控制策略不仅阻碍了冷却机组性能的提高,还严重影响了室内温控精度,对其实际应用极为不利。为了使其更好的应用于小型数据中心,本文研制了相应的控制系统,研究了其在某小型数据中心中实际应用时的运行性能,拟合了换热特性曲线,并进行节能性分析。结果表明:当室内温度设定为22℃、室外温度低于10℃时,采用此机组对数据中心机房进行散热能够满足室内负荷要求,与采用空调散热相比节省电能至少26.77%,具有良好的节能效果。

Compared with the traditional vapor compression air conditioner, the pump-driven two phase cooling unit has a great potential in energy saving of data centers for it consumes less power and has a higher energy efficiency ratio when air temperature is low. However, insufficient control strategies not only hinder the improvement of performance, but also influence the accuracy of indoor temperature con- trolling, which limits the practical application. For a better application on small data centers, this paper designs a control system for the pump-driven two phase cooling unit, and studies its operating performance using in a small data center. This paper also fits the operating characteristic curves and makes an energy saving analysis. The results show that when the set point of indoor temperature is 22 ℃, the pump-driven system can fit the heat load well and get a good energy saving effect under the condition of an outdoor temperature of 10 ℃ or lower, and it can achieve at least a ratio of 26.77% on energy saving comparing with the existing air conditioner of the data center.