Study of self-rewetting fluid applied to loop heat pipe with PTFE wick

After testing the surface tension and heat-transfer performances of LHP system, it shows that LHP system begins to work by adding 3 wt% butanol aqueous solution. It has the maximum heat capacity of 400 W, the minimum thermal resistance 0.32 °C/W and heat flux 20 W/cm2 when increasing to 6 wt% butanol aqueous solution. It's also the first point making LHP system operate successfully. Compared to the water-nickel system, butanol-PTFE system halving the total thermal resistance, heat flux increases over 50%, and the lower operating temperature and pressure, thus it can have higher stability and security.