Visualization of Bubble Dynamics for Pool Boiling of Binary Refrig-erant Mixture R11-R113

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Visualization of Bubble Dynamics for Pool Boiling of Binary Refrig-erant Mixture R11-R113

DIAO Yanhua⁽^a); ZHAO Yaohua⁽^b); WANG Qiuliang

^a Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080, China
^b The College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China

Received:1900-01-01 Revised:1900-01-01 Online:2006-04-28 Published:2006-04-28
Contact: ZHAO Yaohua

双组分制冷工质R11-R113气泡动力学特性的可视化研究

刁彦华^a; 赵耀华^b; 王秋良

^aInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080, China
^b The College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China

通讯作者:
赵耀华

Abstract

Abstract: A digital photographic study of pool boiling with binary mixture R11(CCl3)-R113(CCl3CF3) was performed on a horizontal transparent heater at pressure of 0.1MPa. A high speed digital camera was applied to record the bubble behaviors in boiling process. Strong effects of composition on bubble departure diameter, departure time, nucleation density were observed, which was attributed to the nature of the activation of the boiling surface and mass diffusion effects. The bubble departure diameter, departure period and nucleation density as functions of composition for binary mixtures R11-R113 were presented respectively. From the video images, it can be concluded that evaporation of microlayer is very important to the growth of bubble. It is also observed that there is not any liquid recruited into the microlayer below the bubble.

Key words: binary mixture, heat transfer, bubble dynamics, pool boiling

摘要： A digital photographic study of pool boiling with binary mixture R11(CCl3)-R113(CCl3CF3) was performed on a horizontal transparent heater at pressure of 0.1MPa. A high speed digital camera was applied to record the bubble behaviors in boiling process. Strong effects of composition on bubble departure diameter, departure time, nucleation density were observed, which was attributed to the nature of the activation of the boiling surface and mass diffusion effects. The bubble departure diameter, departure period and nucleation density as functions of composition for binary mixtures R11-R113 were presented respectively. From the video images, it can be concluded that evaporation of microlayer is very important to the growth of bubble. It is also observed that there is not any liquid recruited into the microlayer below the bubble.

关键词: binary mixture;heat transfer;bubble dynamics;pool boiling

DIAO Yanhua, ZHAO Yaohua, WANG Qiuliang. Visualization of Bubble Dynamics for Pool Boiling of Binary Refrig-erant Mixture R11-R113[J]. .

刁彦华, 赵耀华, 王秋良. 双组分制冷工质R11-R113气泡动力学特性的可视化研究[J]. CIESC Journal.

References

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