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Experimental Investigation on Start-up Characteristics of Mechanically Pumped Two-phase Cooling System

Liu Jie1 Pei Nianqiang2 Guo Kaihua2,1 He Zhenhui2 Li Tingxun2(1 Institute of Refrigeration and Cryogenics,Shanghai Jiaotong University,Shanghai 200030)(2 Center of Space Technology,Sun Yat-Sen University,Guangzhou 510275)   

  • Published:2008-02-25
  • Supported by:
    广东省人民政府科技专项;; 科技部国际科技合作重点项目计划(2003DF000050);; 973计划前期研究专项(2006CB708613)

Abstract: In order to investigate the start-up characteristics of MPLHP(Mechanicalty Pumped Loop Heat Pipe),tests were carried out with different operation conditions. The results show that start-up can cause superheat for the evaporator.Moreover,superheat temperature has little relationship with mass flow and heat load but it depends on evaporative temperature.The less the evaporative temperature is,the higher the superheat temperature is.It was also pointed out that the system designer should pay more attention to the system when system start-up without liquid in the evaporator.Because a larger temperature impact would happen to electrical equipment than the start-up process with liquid work fluid filling with the evaporator.