摘要
对具有不同开孔度的机械加工表面多孔管。分别以水和乙醇作为沸腾介质，在0．1MPa下进行了池沸腾换热的实验研究。并对其强化机理进行了分析。实验结果表明，机加工管的传热性能比同规格的工业光管及T型翅片管的传热性能有较大提高，在实验热负荷内其沸腾传热系数是光管的1．7～2．2倍。通过比较3种管的开口度可以知道，开口度为0．3mm的机加工管传热性能最佳。通过对实验数据的回归拟合得到了精度较高的水平管外池核沸腾换热关联式。
The experimental study on nucleate pool boiling heat transfer for three mechanically fabricated porous surface tubes carried out at 0.1 MPa were presented. Water and alcohol were used in the experiments as working medium. The experimental results showed that the heat transfer coefficients for the porous surface tubes are 1.7-2.2 times larger than that for smooth tube. The tube with pore diameter of 0.3 mm enhances the nucleate boiling heat transfer better than other tubes. Based on the experimental observations and analyses for boiling phenomena, boiling heat transfer mechanism was studied. A pool boiling heat transfer correlation with a relative error of ± 30% was obtained by regressive method for the experimental data.
出处
《石油化工设备》
CAS
2006年第4期21-24,共4页
Petro-Chemical Equipment
关键词
机械加工
表面多孔管
沸腾传热
传热强化
mechanically fabricated
porous surface tube
boiling heat transfer
enhanced heat transfer
