Optimization Research Of Heat Dissipation Performance About Integrated CPU Heat Pipe Sink

The cooling effect of the computer CPU(central processing unit)directly affects the working performance and the stability of the CPU.Many scholars have conducted experiments and numerical simulation studies on the integrated heat pipe sink,which is the most effective CPU cooling method for now.However,the existing experimental research is mainly concentrated on various types of integrated heat pipe sunk,and there is still a lack of vertical comparison of the same type of integrated heat pipe sink.And with the CPU rapidly developing,the cooling performance of the integrated heat pipe sink also needs to be further improved.In this paper,the experimental research and numerical simulation of the tube-fin integrated heat pipe sink were carried out,the heat dissipation performance parameters of the integrated heat pipe sink were measured through experiments,and the numerical simulation optimization study of the integrated heat pipe sink was carried out based on the experiment.And in the end of this paper an optimized model of integrated heat pipe sink was proposed.This paper researched the tube-fin integrated heat pipe heat sink respectively composed with 2,4,and 6 heat pipes.The three sinks all use "U" shaped copper heat pipes and flat aluminum fins.The wing ratio is all about 13.5,so they can be contrasted together.By experimental tests,the average temperature of the evaporation and condensation and the maximum heat dissipation power of the three heat pipe sinks were concluded.The thermal resistance of the three heat pipe sinks was calculated and the response time was recorded.The experimental results show that under the working condition of wind speed of 1.8m/s,when the temperature of the heat pipe evaporation end reaches 65℃(the peak working temperature of CPU),the temperature of the condensation of the 2 heat pipe,4 heat pipe and 6 heat pipe sink are all about 36℃,their heat dissipation powers are respectively 80W,120W and 240W;their thermal resistances are respectively 0.553 K/W,0.386 K/W and 0.192 K/W;the time for the three integrated heat pipe sinks to reach thermal equilibrium is all about 17 minBased on the experiment,the numerical simulation of three heat pipe sinks was designed The physical model of the integrated heat pipe sink and the boundary conditions and initial conditions in the numerical simulation are consistent with the experiment.After the post-processing of the simulation results of the three integrated heat pipe sinks,the temperature cloud diagram and velocity vector diagram within the calculation domain were showed in the paper.The results of simulation were analyzed.An optimal design was carried out of the six heat pipes sink.The numerical simulation of different fin thickness and spacing conditions were carried out.The results showed that the fin thickness was 0.3mm and the fin spacing was 1.8mm is the best.When the heating power is 240W,the temperature of the CPU drops by 7.04℃.Finally,according to the temperature cloud of the fin,a new integrated heat pipe sink with an elliptical fin is proposed.It is expected that the new integrated heat pipe sink can save a lot of aluminum material while ensuring the heat dissipation.