| 摘要: |
| 本文提出一种泵驱动两相冷却系统，用于数据中心自然冷却，以实现节能减排的目的。搭建了实验机组，围绕可能对系统性能造成影响的换热器内部阻力、换热器迎面风速、工质流量和工质种类等因素进行了实验研究，分析了各因素对机组换热量和EER造成的影响。结果表明：内部阻力的减小有助于机组功率的减小与EER的提升；流量过大或过小、风速过高或过低都对系统性能不利；R32在泵驱动两相冷却系统中的性能全面优于R22，但存在高温下工质泵低频供液不足的问题。 |
| 关键词: 复合制冷 泵驱动 数据中心 自然冷却 环保工质 |
| DOI： |
| 投稿时间：2017-07-25
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| 基金项目:国家重点研发计划(2016YFB0601601)和国家自然科学基金(51406002,51776004)。 |
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| Performance Optimization and Characteristics of Different Refrigerants for Pump-driven Two-phase Cooling System |
| Wang Xuan,Ma Guoyuan,Zhou Feng |
| (Beijing University of Technology) |
| Abstract: |
| A pump-driven two-phase cooling system was proposed for cooling and energy conservation at data centers. An experimental unit was built to study the effects of influencing factors like internal resistance of heat exchangers, face velocity of heat exchangers, mass flow rate, and type of refrigerant etc. on the performance of the unit. The results show that the decrease in internal resistance benefits the decrease in unit power and promotion of EER (energy efficiency ratio). Both too high and too low face velocity of heat exchangers is disadvantageous to the performance of the system. The performance of R32 is better than that of R22 under the working conditions of pump-driven two-phase cooling systems, but its feed liquid is insufficient under low frequencies of the pump when the outdoor temperature is high. |
| Key words: integrated refrigeration pump-driven data center natural cooling environment friendly refrigerant |
