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提升管管径对导流式气泡泵性能影响的理论与实验研究
赵荣祥, 刘道平, 郑晓倩
0
(上海理工大学制冷技术研究所)
摘要:
基于两相流分相模型,构建气泡泵性能实验系统,以水为工质,对大气压下采用不同提升管内径的导流式气泡泵性能进行理论和实验研究。研究了加热功率100~650 W,沉浸比0.2~0.4,提升管内径7 mm、9 mm、11 mm、13mm、16 mm,提升管长600 mm工况下的气泡泵性能。结果表明,沉浸比的大小对液体提升量的多少起着关键作用;其他条件不变时,一定范围内提升管径的增加能够显著提升气泡泵的液体提升量,超过管径的临界值,效果相反,不但降低了液体提升量,气泡泵的效率也大幅减少,如加热功率300 W时,采用11 mm和16 mm管径的气泡泵液体提升量相差10.23 g/s,管径增加了5 mm,提升量减少了61.15%。
关键词:  导流式气泡泵  提升管管径  两相流  分相模型  Einstein制冷
DOI:
    
基金项目:
Theoretical and Experimental Research of Guided Bubble Pump with Different Lift-tube Diameter
Zhao Rongxiang, Liu Daoping, Zheng Xiaoqian
(Institute of Refrigeration Technology, University of Shanghai for Science and Technology)
Abstract:
Based on the model of separated phase flow in two-phase flow, a bubble pump performance test system with water as the working fluid was built to study the performance of guided bubble pump at atmospheric pressure with different lift-tube diameter by theoretical and experimental method. The bubble pump performance is studied under the condition of heating power in 100 ~ 650 W, immersion ratio between 0.2 ~ 0.4, riser diameter at 7 mm, 9 mm ,11 mm, 13 mm and 16 mm, and riser length at 600 mm. The results show that the submergence ratio plays a key role for the lifting capacity of bubble pump; Ascension within a certain range lift-tube diameter can significantly improve the liquid lifting capacity; when the pipe diameter exceeds critical value, not only the liquid lifting capacity is reduced, the bubble pump efficiency is also sharply reduced. It can be seen from the cases that the lifting capacity difference of 11 mm and 16 mm can reach to10.23 g/s, and lifting capacity is decreased by 61.15% while the pipe diameter increases by 5 mm when the heating power is 300W.
Key words:  guided bubble pump  lift-tube diameter  two-phase flow  separated phase flow model  Einstein refrigeration

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