新闻动态
新闻中心
胡海涛在HVAC&R Research发表论文
2009-04-22
该论文的摘要如下：
ABSTRACT: Two-phase flow patterns and heat transfer characteristics of a R-410A/oil mixture flow boiling inside a horizontal straight smooth tube with the inside diameter of 4.18 mm were investigated experimentally. The flow pattern observations for a R-410A/oil mixture match well with the flow pattern map of Wojtan et al. (2005) by using the refrigerant-oil properties instead of pure-refrigerant properties. The test results show that the heat transfer coefficient of a R-410A/oil mixture increases with mass flux of a refrigerant-oil mixture; the presence of oil enhances the heat transfer by a maximum of 60% at the range of low and intermediate vapor qualities. There is a peak of local heat transfer coefficient at about 2%–5% nominal oil concentration at higher vapor qualities, and the peak shifts to lower nominal oil concentration with the increase of vapor qualities. Higher nominal oil concentration gives a more detrimental effect at high vapor qualities. A new correlation to predict the local heat transfer of a R-410A/oil mixture flow boiling inside the horizontal smooth tubes was developed based on flow patterns and local properties of a refrigerant-oil mixture. The new correlation agrees with 92% of the experimental data of R-410A/oil in a 4.18 mm horizontal smooth tube within a deviation of ±30%, and it agrees with 96% of the experimental data (Hu et al. 2008a) of a R-410A/oil mixture in a 6.34 mm horizontal smooth tube within a deviation of ±20%.
这是我室今年在国际学术期刊上发表的第5篇论文，其余4篇为：
1) Weiting Jiang, Guoliang Ding, Hao Peng. Measurement and model on thermal conductivities of carbon nanotube nanorefrigerants. International Journal of Thermal Sciences, 2009, 48: 1108–1115
2) Guoliang Ding, Haitao Hu, Xiangchao Huang, Bin Deng, Yifeng Gao. Experimental investigation and correlation of two-phase frictional pressure drop of R410A–oil mixture flow boiling in a 5 mm microfin tube. International Journal of Refrigeration, 2009, 32 (1): 150-161
3) Guoliang Ding, Hao Peng, Weiting Jiang, Yifeng Gao. The migration characteristics of nanoparticles in the pool boiling process of nanorefrigerant and nanorefrigerant–oil mixture. International Journal of Refrigeration, 2009, 32 (1): 114-123
4) Guoliang Ding, Xiaokui Ma, Ping Zhang, Weizhe Han, Shinichi Kasahara, Takahiro Yamaguchi. Practical methods for measuring refrigerant mass distribution inside refrigeration system. International Journal of Refrigeration, 2009, 32 (2): 327-334