| 霜形成对翅片管式蒸发器性能影响的研究 |
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| 引用本文： | 夏凊,周振宇,周兴禧.霜形成对翅片管式蒸发器性能影响的研究[J].工程热物理学报,1997(6). |
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| 作者姓名： | 夏凊 周振宇 周兴禧 |
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| 作者单位： | 上海交通大学制冷工程研究所!上海，200030，上海交通大学制冷工程研究所!上海，200030，上海交通大学制冷工程研究所!上海，200030 |
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| 摘 要： | 符号表A面积，mZ7汽化游热、kJ／kgi冰a热扩散半，m‘／s。运动粘度，m勺sdn进口C质量百分数6厚度，mfat潜热D质扩散｝．4｛，ma／sP密度，ng／m‘e出口7烩，＊U一，时间，S，管排m质量，kgA导热系数，W／inKs饱和状态M质流量，ug／s。含湿量，ng水儿g空气sen显热Q制冷量，W下角T总的R气体常数a空气I管S间距，mb翅片间的中心位置。蒸气T温度，KF霜w壁面。；。；w，x，y，z向速度，m／s／翅片x和距离有关的局部分量1目u竟亏目前，热泵的应用越来越广泛，所遇到的最大问题就是蒸发器的结霜问题。结霜使蒸发器的传热情况恶化，同时使…
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| 关 键 词： | 翅片管式蒸发器 霜 |
EFFECT OF FROST ACCUMULATION ON THE PERFORMANCE OF FINNED-TUBES HEAT EXCHANGER |
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| XIA Jing,ZHOU Zhenyu,ZHOU Xingxi.EFFECT OF FROST ACCUMULATION ON THE PERFORMANCE OF FINNED-TUBES HEAT EXCHANGER[J].Journal of Engineering Thermophysics,1997(6). |
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| Authors: | XIA Jing ZHOU Zhenyu ZHOU Xingxi |
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| Abstract: | A major problem faced by refrigeration and heat pump equipment is the deposition and progressive build-up of frost on the exchanger surfaces. Base on the analysis of the flow around the fin and the frost forming mechanism, this paper describes an analytical model that was developed to predict the performance of finned-tube heat exchangers under frosting conditions. The results include frost accumulation and its effect on energy transfer in relation to time. Comparing the analytical data with those experimental data in the past literature, it is found that the model typically underpredicted the experimental results. |
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| Keywords: | finned-tube heat exchanger frost accumulation |
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