Journal of Jilin University(Engineering and Technology Edition) ›› 2019, Vol. 49 ›› Issue (6): 1945-1950.doi: 10.13229/j.cnki.jdxbgxb20180567

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Modified boiling heat transfer model considering roughness and material of heating surface

Xiao-yu HU(),Guo-xiang LI(),Shu-zhan BAI,Ke SUN,Si-yuan LI   

  1. School of Energy and Power Engineering, Shandong University, Jinan 250061, China
  • Received:2018-06-05 Online:2019-11-01 Published:2019-11-08
  • Contact: Guo-xiang LI E-mail:huxiaoyu@mail.sdu.edu.cn;liguox@sdu.edu.cn

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Abstract:

Nucleation boiling term of Chen model was modified by considering the influence of roughness and material of the heating surface. The modified model can effectively fit the experiment data of copper heating surface with roughness less than or equal to 4.62 μm and aluminum heating surface with roughness less than or equal to 8.12 μm, and the overall prediction error is within 30%.

Key words: power machinery and engineering, subcooled boiling heat transfer, surface roughness, Chen model

CLC Number: 

  • TK402

Fig.1

Comparison between Chen model andexperiment"

Fig.2

Correlation between surface roughnessand heat flux"

Fig.3

Correlated equation for predicting nucleation heat transfer from experimental data"

Fig.4

Comparison between modified model andexperiment with aluminum heating surface"

Fig.5

Comparison between modified Chen model and experiment with copper heating surface"

Fig.6

Comparison between predicted heat flux andexperiment heat flux"

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