Université de Caen Basse Normandie, LUSAC, 120 rue de l'exode, Saint Lo, 50000, France.
Nanoscale Res Lett. 2013 Mar 18;8(1):130. doi: 10.1186/1556-276X-8-130.
This paper reports an experimental study on nanofluid convective boiling heat transfer in parallel rectangular minichannels of 800 μm hydraulic diameter. Experiments are conducted with pure water and silver nanoparticles suspended in water base fluid. Two small volume fractions of silver nanoparticles suspended in water are tested: 0.000237% and 0.000475%. The experimental results show that the local heat transfer coefficient, local heat flux, and local wall temperature are affected by silver nanoparticle concentration in water base fluid. In addition, different correlations established for boiling flow heat transfer in minichannels or macrochannels are evaluated. It is found that the correlation of Kandlikar and Balasubramanian is the closest to the water boiling heat transfer results. The boiling local heat transfer enhancement by adding silver nanoparticles in base fluid is not uniform along the channel flow. Better performances and highest effect of nanoparticle concentration on the heat transfer are obtained at the minichannels entrance.
本文报告了在水力直径为 800μm 的平行矩形微通道中进行的纳米流体对流沸腾传热的实验研究。实验采用纯水和悬浮在水基流体中的银纳米粒子进行。测试了两种小体积分数的悬浮在水中的银纳米粒子：0.000237%和 0.000475%。实验结果表明，局部传热系数、局部热通量和局部壁温受水基流体中银纳米粒子浓度的影响。此外，还评估了为微通道或宏通道中的沸腾流动传热建立的不同关联。结果发现，Kandlikar 和 Balasubramanian 的关联最接近水沸腾传热结果。在基液中添加银纳米粒子对沸腾的局部传热增强并不是沿通道流动均匀的。在微通道入口处获得了更好的性能和纳米粒子浓度对传热的最高影响。
