Research on heat transfer characteristics of the internal evaporation and condensation process of gravity heat pipes
Gravity heat pipe is an efficient heat transfer equipment,its basic working principle is the use of liquid in the internal circulation of the way to transfer heat from the heat source to the heat carrier.Fluent software is used to study the heat transfer characteristics of the evaporation and condensation process inside the gravity heat pipe.The heat transfer performance and characteristics are analyzed under different deionized water filling ratio,different heating power and different liquid filling rate.The results show that the heat transfer coefficient increases first and then decreases with the increase of heating power.With the increase of liquid filling rate,the convective heat transfer coefficient first increases and then decreases,and the optimal filling ratio is about 25%of the volume of the vaporizing section of the heat pipe.
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