| 管径变化对蒸发器性能影响的仿真与实验研究 |
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| 引用本文： | 吴极,王瑾,王哲旻,牛臻,王金鑫,刘鹏飞.管径变化对蒸发器性能影响的仿真与实验研究[J].制冷学报,2015(6):104-110. |
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| 作者姓名： | 吴极 王瑾 王哲旻 牛臻 王金鑫 刘鹏飞 |
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| 作者单位： | 上海理工大学环境与建筑学院;上海理工大学环境与建筑学院;上海理工大学环境与建筑学院;上海理工大学环境与建筑学院;上海理工大学环境与建筑学院;上海理工大学环境与建筑学院 |
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| 摘 要： | 家用空调换热器采用的管径不同,产生的传热效果等性能有差异。采用空气焓差法,对具有相同制冷量的5 mm管径换热器和7 mm管径换热器进行了蒸发工况的实验,并建立了不同管径换热器的仿真计算模型,分析了管径的变化对蒸发器制冷剂侧和空气侧的换热和压降的影响。对比实验与计算结果,发现:1)5 mm换热器空气侧表面传热系数提高了17%;2)在相同制冷量下,5 mm换热器的制冷剂质量流量减少了4.6%,质量流速增大了89.4%,同时由于管壁热流密度的增大,引起了蒸干点的提前;3)以制冷剂达到相同干度时的换热系数作为基准,随着干度的增加,5 mm管的管内换热系数增大到7 mm管的1.43~1.86倍;同时制冷剂的摩擦压降、加速压降和局部压降均为7 mm换热器的3倍,压降引起了蒸发温度降低1.1℃。
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| 关 键 词： | 房间空调器 换热器 铜管管径 传热系数 流动压降 |
Simulation and Experimental Study of Tube Diameter Influence on Evaporative Performance of Heat Exchangers |
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| Wu Ji,Wang Jin,Wang Zhemin,Niu Zhen,Wang Jinxin and Liu Pengfei.Simulation and Experimental Study of Tube Diameter Influence on Evaporative Performance of Heat Exchangers[J].Journal of Refrigeration,2015(6):104-110. |
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| Authors: | Wu Ji Wang Jin Wang Zhemin Niu Zhen Wang Jinxin and Liu Pengfei |
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| Affiliation: | School of Environment and Architecture, University of Shanghai for Science and Technology;School of Environment and Architecture, University of Shanghai for Science and Technology;School of Environment and Architecture, University of Shanghai for Science and Technology;School of Environment and Architecture, University of Shanghai for Science and Technology;School of Environment and Architecture, University of Shanghai for Science and Technology;School of Environment and Architecture, University of Shanghai for Science and Technology |
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| Abstract: | |
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| Keywords: | room air-conditioner heat exchanger tube diameter heat transfer coefficient pressure drops |
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