Research On Heat Transfer Performance Of Two-component Liquid Metal Oscillating Heat Pipe

As an important means of transportation,ships play an important role in international trade and transportation.They need to consume a lot of energy during driving,more and more people are beginning to pay attention to the energy consumption of ships.Oscillating heat pipes have good application examples in the fields of microelectronics cooling and heat pipe heat exchangers due to their own excellent performance and simple structure,and have good application prospects in improving the heat exchange efficiency of marine heat exchangers.The heat transfer mechanism of the oscillating heat pipe is complicated during operation,and many factors are affected.From the geometrical parameters,operating parameters and working material properties,the oscillating heat pipe can be further explored by various parties to further improve the heat transfer performance of the oscillating heat pipe.In this paper,an oscillating heat pipe heat transfer test bench was built to conduct heat transfer experiments on oscillating heat pipes using liquid metal as the working medium,to explore the effect of liquid metal on the heat transfer performance of oscillating heat pipe.In this paper,the characteristics of the liquid metal and the requirements of the working fluid for the start and operation of the oscillating heat pipe are first determined as the two-component liquid metal working fluid.One of the components is liquid metal(gallium indium alloy:Ga75.5In24.5),and the other component is methanol or deionized water.Then,an experimental platform for the heat transfer experiment of the oscillating heat pipe was built,and the raw materials and production of the oscillating heat pipe,the experimental system,the experimental equipment,the experimental parameters and the experimental process were determined.A methanol-gallium-indium alloy mixed working fluid oscillating heat pipe was fabricated,and a two-component liquid metal oscillating heat pipe experimental platform was built to conduct a comprehensive study on the heat transfer performance of the two-component liquid metal oscillating heat pipe.The main research was the heat transfer performance at different heat loads and different operating temperatures.In addition,the heat transfer performance of the methanol single-fluid oscillating heat pipe and the methanol-gallium-indium alloy two-component liquid metal oscillating heat pipe were compared.The research found that the heat transfer law of performance change of two oscillating heat pipes is basically same.With the increase of heating power,the thermal resistance of the oscillating heat pipe gradually decreases and eventually stabilizes.When the operating temperature increases from 20? to 60?,under the heating power of 15W,the value of the thermal resistance of the oscillating heat pipe will decrease.The change in thermal resistance will become smaller and smaller.A small amount of liquid metal(gallium-indium alloy)added will strengthen the heat transfer of the oscillating heat pipe.This strengthening effect is more obvious at low heating power,when the operating temperature is 40? and the heating power is 25W,the effect of liquid metal is most significant.A water-gallium-indium alloy mixed working fluid oscillating heat pipe was fabricated,and a two-component liquid metal oscillating heat pipe experimental platform was built to conduct a comprehensive study on the heat transfer performance of the two-component liquid metal oscillating heat pipe.The main research was the heat transfer performance at different heat loads and different operating temperatures.In addition,the heat transfer performance of the water single-fluid oscillating heat pipe and the methanol-gallium-indium alloy two-component liquid metal oscillating heat pipe were compared.The research found that the heat transfer law of performance change of two oscillating heat pipes is basically same.With the increase of heating power,the thermal resistance of the oscillating heat pipe gradually decreases and eventually stabilizes.When the operating temperature increases from 20? to 60 ?,under the heating power of 15W,the value of the thermal resistance of the oscillating heat pipe will decrease.The change in thermal resistance will become smaller and smaller.A small amount of liquid metal(gallium-indium alloy)added will strengthen the heat transfer of the oscillating heat pipe.In addition,the heat transfer performance of the methanol-gallium-indium alloy oscillating heat pipe and the water-gallium-indium alloy oscillating heat pipe are also compared.The experimental results show that when the heating power is low,the thermal resistance of the water-gallium indium alloy oscillating heat pipe is greater than that of the methanol-gallium indium alloy oscillating heat pipe.With the increase of heating power,the thermal resistance of the water-gallium indium alloy oscillating heat pipe will be smaller than that of the methanol-gallium indium alloy oscillating heat pipe.