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Study on the Performance of CPU Radiator Strengthened by Surface Treatment Technology

Author: LiangZiHui
Tutor: TangYong；ZhouHongFu
School: South China University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Surface treatment CPU radiator Microscopic surface texture Radiance Radiation heat coating
CLC: TP306.2
Type: Master's thesis
Year: 2011
Downloads: 185
Quote: 0
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Abstract


With the increasing performance of electronic devices, CPU consumed power is increasing. As a result, the traditional radiator cannot fill the need of thermal control by increasing the area of radiator and improving fan air volume. So the cooling of high heat flux chip becomes the key issues of electronic products currently, which should be overcome in the first. At present, the mainstream way of heat dissipation is still radiator installed fin. In this paper, the performance of CPU radiator was strengthened by surface treatment technology. The technology has the characteristic of simple process, no need for extra room, low cost, and so on, overcomes the need for room, and has a significant effect in CPU radiator.On the basis of aluminum heat-sink common used in CPU, a compound surface treatment technology was developed. The enhanced heat dissipation model of radiator was made based on theoretical analysis. And considering the thermal convection and thermal radiation, the influence of microscopic surface texture and radiation heat coating on CPU radiator was studied. The mainly research works are summarized as follows:(1) On the basis of boundary layer theory, and considering the effect of thermal convection and thermal radiation, heat dissipating capacity of finned radiator was deduced; the thermal radiator transfer equation was also deduced, and supplied theory foundation for coating design.(2) The CPU radiator was treated by chemical polishing, chemical coursing, mechanical shot penning and chemical oxidation, afterward, microscopic surface texture was got in the surface of the CPU radiator. The mechanism of every processing technology was described in detail.(3) The surface roughness was measured by the portable surface roughness. Little parts of test samples were separated by wire-electrode;The microscopic surface texture of processed samples was observed by SEM.(4) The cold gas dynamic spray was used to prepare the radiation heat coating and the spray process and filming mechanics was narrated in detail.(5) Using the thermal infrared imager to determine the radiance of the test samples, and studied the relationship between the Surface microscopic appearance and radiance;(6) The experimental simulation device of CPU radiator was established, input power was changed in the contrast test, and the performance of samples was studied in the case of forced convection.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Adjustment,testing,calibration > Adjustment , test method
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