Synergistic effect of flow pattern evolution of dispersed and continuous phases in direct-contact heat transfer process

Xu, Jianxin; Liu, Fanhan; Xiao, Qingtai; Huang, Junwei; Yu, Fei; Yang, Yunfei; Zhai, Yuling; Pan, Jianxin; Wang, Hua

doi:10.1016/j.ijrefrig.2019.11.020

Cited by 4 publications

(1 citation statement)

References 32 publications

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“…Xu et al [27] proposed a new image analysis technique to study droplet populations in a direct contact heat exchanger, which was effectively distinguishing the darker continuous phase in gas-liquid two-phase flow. The behavior of droplet groups in the direct contact boiling heat transfer process was characterized, providing new ideas for the subsequent data analysis of droplet groups.…”

Section: Bubble Droplet Population Heat Transfer Modelmentioning

confidence: 99%

Research Progress on Direct Contact Evaporation Heat Transfer between Two Immiscible Working Fluids

Fu,

Xiong,

Liu

et al. 2023

Chem Eng & Technol

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The direct contact evaporation heat transfer of two immiscible fluids can realize low‐temperature differential heat transfer, which is an important method to improve the heat transfer coefficient. This article focuses on the dispersed phase of organic working fluids and the continuous phase of immiscible inorganic fluids and summarizes the research on direct contact evaporation heat transfer in the past 15 years. The main research methods include theoretical analysis, numerical models, and experimental research. The evaporation process of a single droplet mainly involves bubble droplet growth, droplet configuration and discriminant, droplet shape change, rising speed and path, etc. In practice, dispersed phases mostly exist in populations, and the research mainly focuses on collisions, coalescence, and rupture between droplets and bubbles, as well as on the number and size distribution. The volumetric heat transfer coefficient is used to reflect the heat transfer capacity of the heat exchanger. The factors affecting evaporation heat transfer performance are complex, and increasing the uniform mixing of bubbles is an important method to improve the heat transfer coefficient. In the future, direct contact evaporation heat transfer is expected to be promoted to multiple fields.

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Section: Bubble Droplet Population Heat Transfer Modelmentioning

confidence: 99%

Research Progress on Direct Contact Evaporation Heat Transfer between Two Immiscible Working Fluids

Fu,

Xiong,

Liu

et al. 2023

Chem Eng & Technol

View full text Add to dashboard Cite

show abstract

Experimental investigation on the uniformity optimization and chaos characterization of gas-liquid two-phase mixing process using statistical image analysis

Zhang¹,

Yang

et al. 2021

Advanced Powder Technology

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Logistic fitting model application for evaluation of gas-liquid two-phase mixing effects

Gao

et al. 2022

International Journal of Chemical Reactor Engineering

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The evaluation of mixing effects is crucial in industrial production such as chemical and metallurgical industries. An improved Betti number method is proposed by using a gas-liquid top-blow mixing experiment and a direct contact heat exchange experiment. This method is adapted to the comprehensive evaluation of flow mixing and heat transfer performance under conditions of dispersed particles or bubbles where the target is identifiable. The comparison results and reveals that our method can not only portray the mixing effect by the critical point of the area integration curve of the Betti number time series but also the parameters (i.e., slope and intercept) obtained after the area integration of the Betti number curve by the logistic regression model can effectively characterize the mixing time and heat exchange performance. The intercept variation of the area integral of the Betti number curve was found to have a high correlation with the correlation coefficients of mixing time and heat transfer coefficient. Meanwhile, a new index for evaluating the mixing performance was obtained. The optimal working condition was obtained. This method is simple and easy to implement and can be extended to processes where the target is identifiable in a transparent reactor and where both mixing and heat transfer effects need to be quantified.

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Synergistic effect of flow pattern evolution of dispersed and continuous phases in direct-contact heat transfer process

Cited by 4 publications

References 32 publications

Research Progress on Direct Contact Evaporation Heat Transfer between Two Immiscible Working Fluids

Research Progress on Direct Contact Evaporation Heat Transfer between Two Immiscible Working Fluids

Experimental investigation on the uniformity optimization and chaos characterization of gas-liquid two-phase mixing process using statistical image analysis

Logistic fitting model application for evaluation of gas-liquid two-phase mixing effects

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