| 摘要: |
| 电子器件和芯片性能的提高带来电路及其芯片的散热问题日益突出，迫切需要开发研究高效的电子冷却系统，蒸汽压缩式制冷被认为是最具应用前景的制冷方式。针对一套用于电子冷却的微型蒸汽压缩制冷系统，在固定制冷负荷为101.4 W时，通过实验研究了制冷剂充注量和毛细管长度的不同匹配对系统压力、蒸发器侧的制冷效果、压缩机功耗及性能系数的影响关系。结果表明：增加充注量或减短毛细管长度都会导致蒸发压力升高，两热沉被冷却至平衡时的表面温度也升高，且压缩机功耗增大，系统性能系数下降。当充注量为120 g、毛细管长度为3 m时，实验系统的整体性能较好，两组热沉温度能维持在约12 ℃不变，压缩机功耗41 W，系统制冷COP能达到2.48。 |
| 关键词: 电子冷却 蒸汽压缩 微型制冷系统 制冷剂 毛细管长度 |
| DOI： |
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| 基金项目: |
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| Experimental Study on a Miniature Refrigeration System for Electronics Cooling |
| Liu Gang,Wu Yuting,Lei Biao,Ma Rui,Ma Chongfang |
| (Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, Beijing University of Technology) |
| Abstract: |
| With the improvement of electronics performance, the problem of heat dissipation in circuit and chip is becoming more serious, development of high-efficiency electronics cooling systems is urgently needed, and vapor compression refrigeration is believed to be the most promising one. Based on a miniature vapor compression refrigeration system for electronics cooling, when cooling load is fixed as 101.4 W, the impacts of refrigerant charge and capillary length on the refrigeration system, including system pressure, cooling effects of evaporator, power consumed by compressor and coefficient of performance, are studied through experiments. The results show that the increase of refrigerant charge or reduced capillary length will result in higher evaporation pressure, the surface temperature of heat sinks and the power consumption of the compressor will increase, then the coefficient of performance will decrease. When refrigerant charge is 120 g and capillary length is 3m, the overall performance of the experimental system is optimal, temperature of the two heat sinks can be maintained at about 12 ℃, the power consumed by compressor is 41 W, and COP can reach 2.48. |
| Key words: electronics cooling vapor compression miniature refrigeration system refrigerant capillary length |
