| 摘要: |
| 为解决传统数据中心空调系统能耗高和冷却效率低等问题，本文提出了带有蒸发式冷凝器的制冷剂泵驱动热管与蒸气压缩复合数据中心空调系统，实验分析了不同室外温度与冷凝器风速下系统的运行性能。结果表明：在热管模式下，当室外温度低于0 ℃时，降低冷凝器风速能够提升系统COP；当室外温度高于0 ℃时，增大室外机风速能够提高系统节能性。降低冷凝器风速能有效防止蒸发器结露，热管模式下风速每降低1 m/s，蒸发温度平均升高1.8 ℃。相对于风冷冷却，当室外温度为5~10 ℃时，蒸发冷却模式开启后，系统COP平均提升15.5%；同时，蒸发冷却也增强了系统冷却能力，将热管模式室外温度运行上限从10 ℃提高至15 ℃。在蒸气压缩模式下，蒸发冷却可以有效提升系统能效比，当室外温度为30 ℃时，系统切换至蒸发冷却模式后，在低(1.5m/s)、中(2.5m/s)、高(3.5 m/s)三档风速下的系统COP相比于风冷模式，分别提升了17.5%、16.2%和14.3%。 |
| 关键词: 数据中心空调系统 实验研究 冷凝器风速 蒸发冷却 COP |
| DOI： |
| 投稿时间：2021-04-17 修订日期：2021-09-17
|
| 基金项目:国家自然科学基金（51778115）和中央高校基本科研业务专项资金（N182502043）资助。 |
|
| Experimental Study on Operation Performance of Composite Cooling System with Evaporative Cooling Heat Pipe and Vapor Compression for Data Center |
| Xue Da,Han Zongwei,Sun Xiaoqing,Cheng Xinlu,Li Xiuming |
| (College of Metallurgy, Northeastern University) |
| Abstract: |
| In this study a refrigerant pump-driven heat pipe and vapor compression composite cooling system with an evaporative condenser was proposed to solve the problems of high energy consumption and low cooling efficiency of traditional data center cooling systems. Through experimental research, the operating performance of this system under different outdoor temperatures and air velocities of condenser was analyzed. The results show that in the heat pipe mode, when the outdoor temperature is lower than 0 °C, reducing the air velocity of condenser can increase the system coefficient of performance (COP) and effectively prevent condensation in the evaporator. The evaporation temperature increases by 1.8 ℃ on average for every 1 m/s decrease in the air velocity of condenser. When the outdoor temperature is higher than 0 °C, increasing the air velocity of the outdoor unit can improve the energy-saving performance of the system. Compared with air cooling, when the outdoor temperature is 5–10 °C, the COP is increased by 15.5% on average after the evaporative-cooled mode is turned on. At the same time, evaporative cooling also enhances the cooling capacity of the system, increasing the upper limit of the outdoor temperature in the heat pipe mode from 10 °C to 15 °C. In the vapor compression mode, evaporative cooling can effectively improve the energy efficiency ratio of the system. When the outdoor temperature is 30 ℃, after the system is switched to the evaporative-cooled mode, the COP is increased by 17.5%, 16.2%, and 14.3%, respectively under the three air velocity of low (1.5 m/s), medium (2.5 m/s) and high (3.5 m/s). |
| Key words: data center cooling system experimental research air velocity of condenser evaporative cooling COP |
