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题名	自循环微通道电子冷却器的设计与实验研究; Design and Experimental Investigation of Micro-channel Self-circulated Electronics Cooler
作者	李银惠
学位类别	硕士
答辩日期	2007-06-09
授予单位	中国科学院广州能源研究所
授予地点	广州能源研究所
导师	徐进良
关键词	自循环 微通道 冷却器 蒸发器 冷凝器 工质 充液率
其他题名	Design and Experimental Investigation of Micro-channel Self-circulated Electronics Cooler
中文摘要	Detailed experimental measurements of a self sustained micro-channel electronics equipment cooler were performed ,using methanol and purified water as working fluid and 4 samples of cooler was fabricated and a scheme of optimize was presented. A high speed data acquisition system was used to acquire the cooling performance of the samples, and we got the diagram and data of oscillations which is helpful for optimization. In this experiment, the effect of the different working fluid on the thermal performance of cooler, effect of fill ratio and effect of heating power were analyzed. Meanwhile, the mechanism of the oscillation was analyzed. It is found that the cooler with methanol has smaller oscillation period and is easy to be boiled over and which with water has irregular diagram of oscillation. Owing to the higher enthalpy of vaporization and surface tension cooler with water can perform better at low fill ratio than with methanol. It works better at low heating power, such as 130W, with water as working fluid. Owing to the higher liquidity, it works better at high heating power with methanol. The best fill ratio is in 30%～50%, according to the definition of this paper. Cooler with low ratio is likely to be boiled over, and high ratio is harmful to circulation. The structure of pipes influences the performance of heat dissipating. The cooler with improved structure according to the data acquired by experiments is more capable to dissipate heat. The number of pipe elbow should be as few as possible in order to .promote circulation, besides that the structure of condenser should has little fluid deposit and the length of fall between condenser and evaporator should be large at high heating power and reverse at low power. There are four modes of circulation, called common circulation, reverse circulation,single heat pipe and double heat pipe respectively. Common circulation is that working fluid runs along the preset sequence that from evaporator, to evaporator pipe, to condenser and comes back to evaporator. Working fluid runs towards the opposite direction to common circulation in reverse circulation. Single heat pipe menas that the vapor runs along the evaporator pipe, then turns to liquid and comes back to evaporator along the same way, and the working fluid doesn’t run along the condenser pipe. Double heat pipe means that the working fluid runs along both the evaporator pipe and condenser pipe to condenser and comes back through the same way. Different running mode indicates different working performance. Fabricate a cooler which is appropriate to CPU of personal computer, and it runs well for long-term use.
语种	中文
公开日期	2011-07-10 ; 2011-07-15
页码	69
内容类型	学位论文
源URL	[http://ir.giec.ac.cn/handle/344007/4001]
专题	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	李银惠. 自循环微通道电子冷却器的设计与实验研究, Design and Experimental Investigation of Micro-channel Self-circulated Electronics Cooler[D]. 广州能源研究所. 中国科学院广州能源研究所. 2007.

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