Flow distribution characteristics of gravity- and pump-driven CO2 two-phase thermosyphon loops with three evaporators

被引：1
作者：
Tong, Zhen [1 ,2 ]
Wang, Peng [1 ,2 ]
Han, Zekun [1 ,2 ]
Wang, Wencheng [1 ,2 ]
机构：
[1] Qingdao Univ Technol, Sch Environm & Municipal Engn, Qingdao 266520, Peoples R China
[2] Shandong Engn Res Ctr Hlth Environm & Low Carbon E, Qingdao 266520, Peoples R China
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION | 2025年 / 173卷
关键词：
Multi-evaporator thermosyphon loop; Operating characteristic; Flow distribution; Liquid pump; CO2;
D O I：
10.1016/j.ijrefrig.2025.02.011
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Currently, most two-phase thermosyphon loop (TPTL) systems used in data centers feature a multi-evaporator design. The flow rate of the working fluid through each evaporator is one of the crucial factors affecting the cooling effect of the TPTL. Therefore, this paper conducts a comparative study on the flow distribution patterns of gravity- and pump-driven multi-evaporator TPTLs. The impacts of flow resistance and load distribution on each branch's flow distribution of working fluid are analyzed. It was found that the flow distributions of both gravity- and pump-driven TPTLs were influenced by load distribution. Under non-uniform load conditions, the flow rate tended to skew towards evaporators with higher loads. Additionally, the flow distribution of the gravity-driven TPTL was highly affected by individual branch flow resistance, which was markedly different from the pump-driven TPTL. Under uniform load conditions, the flow rate of the pump-driven TPTL was generally evenly distributed among the evaporators.
引用
收藏
页码：76 / 87
页数：12
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