Modeling and Experimental Study of an Open Two-Phase Loop Driven by Osmotic Pressure and Capillary Force  

作　　者：Hanli Bi Zheng Peng Chenpeng Liu Zhichao Jia Guoguang Li Yuandong Guo Hongxing Zhang Jianyin Miao 

机构地区：[1]National Key Laboratory of SpacecraftThermal Control,Beijing Institute of Spacecraft System Engineering,China Academy of Space Technology,Beijing,100094,China [2]School of Aeronautical Science and Engineering,Beihang University,Beijing,100083,China [3]School of Energy and Environment Engineering,University of Science and Technology Beijing,Beijing,100083,China

出　　处：《Frontiers in Heat and Mass Transfer》2025年第1期55-70,共16页热量和质量传递前沿(英文)

基　　金：Science Foundation for Distinguished Young Scholars 2020-JCJQ-ZQ-042 Intelligent and Bionic Spacecraft Thermal Control Technology Inspired by Tree Sap Transport Principle.

摘　　要：As space technology advances,thermal control systems must effectively collect and dissipate heat from distributed,multi-source environments.Loop heat pipe is a highly reliable two-phase heat transfer component,but it has several limitations when addressing multi-source heat dissipation.Inspired by the transport and heat dissipation system of plants,large trees achieve stable and efficient liquid supply under the influence of two driving forces:capillary force during transpiration in the leaves(pull)and root pressure generated by osmotic pressure in the roots(push).The root pressure provides an effective liquid supply with a driving force exceeding 2 MPa,far greater than the driving force in conventional capillary-pumped two-phase loops.Research has shown that osmotic heat pipes offer a powerful driving force,and combining osmotic pressure with capillary force has significant advantages.Therefore,this paper designs a multi-evaporator,dual-drive two-phase loop,using both osmotic pressure and capillary force to solve the multi-source heat dissipation challenge.First,a transmembrane water flux model for the osmotic pressure-driven device was established to predict the maximum heat transfer capacity of the dual-drive two-phase loop.Then,an experimental setup for a multi-evaporator“osmotic pressure+capillary force”dual-drive two-phase loop was constructed,capable of transferring at least 235 W of power under a reverse gravity condition of 20 m.The study also analyzed the effects of reverse gravity height,heat load distribution among the three evaporators,startup sequence,and varying branch resistances on the performance of the dual-drive two-phase loop.

关 键 词：Multi-heat sources osmotic pressure two-phase loop dual-drive loop heat pipe 

分 类 号：O35[理学—流体力学]