Heat and Mass Transfer

, Volume 55, Issue 12, pp 3603–3612 | Cite as

Subcooled boiling heat transfer characteristics of alcohol in micro-cylinder-groups

  • Zhaoliang WangEmail author
  • Xinrui Zhang
  • Jia Li
  • Guangfan Meng
  • Shuai Wang


Subcooled boiling of alcohol flowing through micro-cylinder-groups with different heights in aligned arrangement was investigated. Meanwhile, the outlet temperature and Nusselt number of the working fluid were obtained when the heating power was 80 W, 60 W and 40 W respectively. Subcooled boiling is divided into two parts: the partially developed stage and fully developed stage. The result showed that the outlet temperature of the fully developed stage in subcooled boiling changed rarely as the Reynolds number decreased. At the same heating power, the heights of the micro-cylinders had little effects on the outlet temperature of working fluid in the fully developed stage. However, for the same height of micro-cylinder, the fully developed stage of subcooled boiling came earlier as the heating power increased. And the Nusselt number in the fully developed stage was greater than that in the partially developed stage. Based on the regression analysis of experimental data, a correlation formula of Nusselt number for subcooled boiling in micro-cylinder-groups was established and made comparison with existing correlation.


Micro-cylinder-groups Subcooled boiling Reynolds number Nusselt number Correlation formula 



Heat transfer area of micro-cylinder-groups, m2


Diameter of micro-cylinder, m


Height of micro-cylinder, m


Hypothetical height of micro-cylinder, m


Width of experimental section, m


Number of micro-cylinders


Electric power, W


Pressure, Pa


Heat flux, W/m2


Cylinder longitudinal space, m


Cylinder transverse space, m


Temperature at the bottom of the experimental section, °C


Ambient temperature, °C


Feature temperature of the working fluid, °C


Saturation temperature of the working fluid, °C


Undercooling, °C


Boiling number


Jacob number


Prandtl number


Emissivity of copper


Constant of Stefan-Boltzmann, W/(m2·K4)


Thermal conductivity of copper, W/(m·K)


Fin efficiency


Heat transferred from the heating section, W





Saturation state



We would like to thank Z. G. Liu in Energy Research Institute of Shandong Academy Sciences for the assistance on experimental system and helpful advice. We acknowledge funding supports from the National Natural Science Foundation of China (Grant No. 51876223), and the Fundamental Research Funds for the Central Universities (Grant No. 18CX06035A).

Compliance with ethical standards

Conflict of interest

We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work, there is no professional or other personal interest of any nature or kind in any product, service and/or company that could be construed as influencing the position presented in, or the review of, the manuscript entitled.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Zhaoliang Wang
    • 1
    Email author
  • Xinrui Zhang
    • 1
  • Jia Li
    • 1
  • Guangfan Meng
    • 1
  • Shuai Wang
    • 1
  1. 1.Energy and Power DepartmentChina University of Petroleum (East China)QingdaoChina

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