| 摘要: |
| 制冷设备对换热器紧凑化和小型化的需求促使人们开发新型的强化传热技术，而管内扭带插入件是一种廉价且易于制造的被动强化传热技术，在制冷系统蒸发器中具备良好的应用潜力。扭带插入两相沸腾换热的管中能够增大表面传热系数，但同时也增大了管内压降。分析发现，通常情况下，质量流量、干度的变化与表面传热系数和压降的变化呈正相关，而管径、扭率、饱和温度的变化与表面传热系数和压降的变化呈负相关。沸腾换热过程复杂、评价指标选取不一、实验工况数量有限等因素是导致各学者总结的扭带插入的最佳条件不一致的主要原因。本文收集了各作者预测的内插扭带管内沸腾换热的表面传热系数和压降的关联式，认为管内扭带插入件还需要进一步明确最佳使用条件，并需要结合蒸发器整机或变频压缩机加以研究。 |
| 关键词: 管内扭带插入件 沸腾换热 强化传热 压降 |
| DOI： |
| Received:October 11, 2021Revised:November 23, 2021 |
| 基金项目: |
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| Review on Research Status and Prospects of Twisted Tape Inserts in Boiling Heat Transfer Enhancement |
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Huang Shenjie1, Xiong Tong1, Wang Genfa2, Liu Jie3, Xu Zhansong2, Yan Gang1
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| (1.School of Energy and Power Engineering, Xi'an Jiaotong University;2.Zhejiang Tongxing Technology Co., Ltd.;3.Shaanxi Heavy Duty Automobile Co., Ltd.) |
| Abstract: |
| The demand for compact and miniature heat exchangers in refrigeration equipment has led to the development of new heat transfer enhancement technologies. Twisted tape inserts are cheap and easy to manufacture, and can be classified as a passive heat transfer enhancement technology. They have great application potential in the evaporator of refrigeration systems. Inserting twisted tapes into a tube with two-phase flow boiling can increase the surface coefficient of heat transfer and pressure drop in the tube. The analysis in this study revealed that changes in mass flow and vapor quality positively correlated with the the surface coefficient of heat transfer and pressure drop, while changes in pipe diameter, twist ratio, and saturation temperature negatively correlated with the surface coefficient of heat transfer and pressure drop. The complexity of the boiling heat transfer process, different evaluation criteria, and limited experimental conditions are the main reasons why the best conditions for twisted tape insertions are inconsistent as explained by different scholars. In addition, this study also summarized the correlations for the surface coefficient of heat transfer and pressure drop of boiling heat transfer in tubes with twisted tape inserts as explained by different researchers. Finally, we believe that the best operating conditions of the twisted tape inserts need to be further clarified, and the twisted tape insert needs to be studied in real evaporators or inverter compressors. |
| Key words: twisted tape inserts boiling heat transfer heat transfer enhancement pressure drop |
