Heat Transfer Investigation in Evaporator of Loop Heat Pipe During Startup

The problem of startup heating for a cylindrical evaporator of a loop heat pipe when the evaporator is completely filled initially with liquid has been examined. A two-dimensional mathematical heat transfer model has been formulated for this problem, for which the system of differential heat conduction equations was solved numerically. Modeling of the heat transfer processes in a cylindrical evaporator was conducted for different thermal regimes. The effects of the evaporator geometrical parameters and the thermophysical properties of materials during the formation of the temperature field were investigated. The results are presented in the analysis of the main factors that influence the dynamics of the evaporator startup.