| 摘要: |
| 严重的能源和环境危机阻碍了可持续发展和实现“双碳目标”，因此数据中心必须开发更节能高效的机房环境制冷系统。本文设计了间接-直接蒸发冷却冷水机组耦合热管背板系统，在高湿度地区数据中心全工况共4种运行模式。建立系统各部件数学模型，以南京为例，冷水机组供回水温设计为10/16 ℃，计算结果表明全年可利用自然冷源的时间占59.9%，其中完全自然冷源时间占42.6%；供回水温度提高，可利用自然冷源时间相应延长。同时通过实验探究影响背板末端性能的相关因素及影响程度，冷源不同供回水温度对背板制冷性能影响较大，温度提高使制冷量减小；CDU与背板安装高度差在满足制冷剂循环动力要求后对背板性能影响不显著；换热器铜管管径由7 mm减小至5 mm，制冷量和送风风量有所提升。 |
| 关键词: 蒸发冷却 热管背板 数据中心 全工况运行 制冷性能 |
| DOI： |
| 投稿时间：2022-10-27 修订日期：2022-12-28
|
| 基金项目:国家自然科学基金（52142803）资助项目。 |
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| Research on Heat-Pipe Backplane Air-Conditioning System Based on Evaporative Cooling in Data Center |
|
Chen Shilu1, Zhang Xiaosong1, Zhao Shanguo2
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| (1.School of Energy and Environment, Southeast University;2.School of Electrical Engineering and Automation, Jiangsu Maritime Institute) |
| Abstract: |
| Severe energy and environmental crises hinder sustainable development and realization of carbon peaking and carbon neutrality; therefore, more energy-efficient cooling systems must be developed for data centers. In this study, an indirect–direct evaporative cooling chiller coupled with a heat-pipe backplane air-conditioning system was designed, with four operating modes throughout the year. In Nanjing, the water supply and return temperatures of the chiller were designed to be 10 °C and 16 ℃, respectively. A mathematical model of each component was established; it was found that free cooling was used 59.9% of the year, and completely free cooling was used 42.6% of the year. When the supply and return temperatures increased, the free-cooling time increased. In addition, we explored the factors influencing heat-pipe backplane performance. The temperatures of the supply and return water had a great impact – the cooling capacity decreased as the temperature increased. The height difference between the CDU and the backplane had little effect once the power requirements of the refrigerant cycle were met. The diameter of the copper tube in the heat exchanger was reduced from 7 mm to 5 mm, and the cooling capacity and air-supply volume were improved. |
| Key words: evaporative cooling heat-pipe backplane data center full operating conditions refrigeration performance |
