碩士 / 國立臺北科技大學 / 製造科技研究所 / 95 / The study focuses on the CPU cooler with the combination of heat pipe and cooling plates, which has structural investigations for the CPU cooler. The main peformance is the measurements and analyses of micro-heat flow between heat pipe and cooling plates including characterization of the heat pipe''s heat transfer, heat transfer from the heat pipe to the cooling plates, flow phenomena between the cooling plates, and so on. The applied equipments and instruments are homemade principally based on the ASTM standard. The until now accomplished equipment are the CPU simulator and the thermal resistance measuring instrument, which can also be used to measure the general CPU cooler. Moreover, the research uses also the infrared thermal camera for quantitative measurements and built the color schlieren for qualitative flow visualization. The color schlieren technique can already view the heat flow nearby the heat pipe as well as the copper pipe and compare the characteristics of heat transfer between the heat pipe and the copper pipe in the water.
The heat pipe owns the extreme large heat conductivity than the copper pipe and is often applied in CPU cooler in combination with cooling plates. The heat transfer of heat pipe uses the special technique, which is with help of the inside liquid evaporation for heat absorption and the inside micro-structural capillarity for condensation. This technique causes the instant heat transfer from heat source to the another side. After combination of the heat pipe with cooling plates will change this heat transfer characteristics. This work first built a CPU simulator in accordance with the ASTM standard for the heat pipe heating, then uses the color schlieren technique to visualize the sequent heat flux nearby the heat pipe and the infrared thermal camera for quantitative temperature measurements synchronously. The result shows that the heat flux first appears at the opposite side from the heat source and exhibits also the highest temperature in this side, which is reverse to the heat transfer characteristics of copper pipe. The result agrees to the theory completely. Another very interest result is that the heat flux of cooling plate nearest the heat source is first viewed then the others, which is similar to the combination with copper pipe.
| Identifer | oai:union.ndltd.org:TW/095TIT05621041 |
| Date | January 2007 |
| Creators | Hong-Ming Chen, 陳宏明 |
| Contributors | 丁振卿 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 94 |
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