论文部分内容阅读
评估纳米制冷剂CuO-R113的沸腾换热效果需要定量预测CuO纳米颗粒在CuO-R113纳米制冷剂沸腾过程中的迁移量。本文首先理论分析了CuO纳米颗粒的迁移过程,结果表明:CuO-R113纳米制冷剂沸腾过程中,单个CuO纳米颗粒克服液态制冷剂的表面张力进入气相是不可能的,CuO纳米颗粒发生迁移的原因是气泡与CuO纳米颗粒的粘附作用。基于此建立了预测CuO纳米颗粒迁移量的计算模型,模型计算值与实验值吻合良好。
To evaluate the boiling heat transfer effect of CuO-R113 nano-refrigerant, it is necessary to quantitatively predict the migration of CuO nanoparticles during boiling of CuO-R113 refrigerant. In this paper, the migration process of CuO nanoparticles is theoretically analyzed. The results show that it is impossible for a single CuO nanoparticle to overcome the surface tension of the liquid refrigerant into the gas phase during the boiling process of CuO-R113 refrigerant, and the migration of CuO nanoparticles occurs Is the bubble adhesion with CuO nanoparticles. Based on this, a model for predicting the migration of CuO nanoparticles was established. The calculated values agree well with the experimental data.