Thermal performance comparison of flat plate evaporator loop heat pipe operating between horizontal condition and gravity assisted condition

With huge developments of science and engineering especially information and communication technology, loop heat pipe (LHP), a passive two-phase cooling device, can be considered one of the promising heat transfer devices with effective thermal conductivity. In this study, a new evaporator structure is fabricated and experiments are carried out horizontal and gravity assisted operating condition. Water is selected as working fluid while sintered stainless steel wick is installed as capillary structure of LHP. The Results show that, gravity assisted LHP has higher performance compared to horizontal LHP and it can keep stable operating state at heat load 520 W without dry out phenomenon. (paper)