| 摘要: |
| 采用微通道换热器作为分离式热管的蒸发器，在充液率为80%~150%之间进行了实验研究。实验测量了微通道蒸发器换热量、管壁温度分布及系统EER，分析了不同充液率下微通道蒸发器的工作状态，计算了蒸发器传热系数，实验结果表明：微通道蒸发器换热量随室内外温差的增大而增大，分离式热管最佳充液率为120%左右。此外，与翅片管蒸发器进行了实验对比，在换热量相当的条件下，微通道蒸发器重量减轻了45%，系统工质充注量降低了51.9%，系统EER提高了2.8%。 |
| 关键词: 分离式热管 微通道换热器 充液率 |
| DOI： |
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| 基金项目:国家科技支撑计划(2012BAA13B03_02_4)资助项目。 |
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| Experimental Study on the Working Fluid Filling Rates of Microchannel Evaporator in a Special Separate Type Heat Pipe |
| Hu Zhangbao,Zhang Zhiwei,Jin Tingxiang,Shao Shuangquan,Zhang Hainan |
| (School of Building Environment Engineering, Zhengzhou University of Light Industry;School of Energy and Power Engineering, Zhengzhou University of Light Industry;Technical Institute of Physics and Chemistry, CAS) |
| Abstract: |
| The microchannel heat exchanger was used as the evaporator of a separated type heat pipe, and the working fluid filling rate of the separate type heat pipe was studied experimentally when the filling rate changed from 80% to 150%. The heat transfer, the wall temperature of microchannel evaporator and the EER of the system were measured. The heat transfer characteristics under different filling rate were analyzed respectively, and the heat transfer coefficient was calculated. The results show that the heat transfer increased with the temperature difference between the indoor air and the outdoor air. The optimal filling rate was about 120%. Moreover, the microchannel evaporator was compared experimentally with the finned tube evaporator under the condition of same heat transfer. The weight and the refrigerant charge of the microchannel evaporator is 45% and 15.9% lower than that of the finned tube evaporator, respectively. The EER of the system with the microchannel evaporator is 2.8% higher than that of the system with the finned tube evaporator. |
| Key words: eparated type heat pipe microchannel heat exchanger filling rate |
