池沸腾加热器换热优化设计——基于Boltzmann方法研究并选取加热器最优参数

Optimized Heat Exchange Design for Pool Boiling Heaters--Studying and Selecting Optimal Parameters for Heaters Based on the Boltzmann Method

本文采用了相变格子Boltzmann模型研究加热器高度、长度、表面润湿性和表面结构对池沸腾换热性能的影响。我们发现加热器高度较低时汽液相变速度更大,因此加热器高度越低热流密度越大。另一方面,加热器长度越短,换热性能越好;其次,在低过热度下全疏水加热器换热性能最好,而在高过热度下全亲水换热器性能则更好;最后,我们还研究了加热器表面微结构的影响,发现锥形表面加热器的换热性能要优于光滑表面加热器。

This study uses the phase-change lattice Boltzmann model to investigate the influence of heater height,length,surface wettability and surface structure on the pool boiling heat transfer perfor-mance.We found that when the heater height is lower,the vapor-liquid phase change rate is high-er,leading to a greaster heat flux density.Additionally,shorter heater lengths exhibit better heat transfer performance.Moreover,at low degrees of superheat,fully hydrophobic heaters demon-strate the best heat transfer performance,whereas at high degrees of superheat,fully hydrophilic heaters perform better.Lastly,we examined the impact of heater surface microstructures and found that the conical surface heater exhibits better heat transfer performance compared to the smooth surface heater.