Establishment of Heat Transfer Correlation for the Supercritical Water Flow near the Upper Generating Line of an Inclined Upward Smooth Tube[J]. 2016, 50(1): 72-77+123.
DOI:
Establishment of Heat Transfer Correlation for the Supercritical Water Flow near the Upper Generating Line of an Inclined Upward Smooth Tube[J]. 2016, 50(1): 72-77+123.DOI: 10.7652/xjtuxb201601012.
Establishment of Heat Transfer Correlation for the Supercritical Water Flow near the Upper Generating Line of an Inclined Upward Smooth Tube
In order to develop an accurate and universal correlation for predicting the heat transfer coefficient of the supercritical water(SCW)flow near the upper generating line in an upward smooth tube with different inclined angles
the existing empirical correlations were evaluated in this paper based on the collected experimental data from literature under the working conditions without heat transfer deterioration. It is shown that the prediction error of these correlations were quite large. Considering the effects of the SCW thermal physical properties and the inclined angle of the tube on heat transfer performance in a smooth tube
a new correlation was proposed. The prediction error of this new correlation was smaller compared with the existing empirical correlations and its mean relative deviation
mean relative absolute deviation and standard deviation are 0.88%
12.80% and 16.68%
respectively and 90.06% of the data fall within the error zone of ±30%. It means that the proposed correlation can be used to predict the heat transfer coefficient of the SCW flow near the upper generating line in an inclined upward smooth tube under the working condition without heat transfer deterioration
providing a basis for the design and safe operation of supercritical pressure boilers.
TIAN Yongsheng, CHEN Tingkuan, XU Jinliang, et al. Heat transfer water characteristics of flowing in inclined supercritical tubes [J]. Journal of Chemical Industry and Engineering, 1993, 44(1): 34-40.
YIN F, LI T K C, XIONG H. An investigation on heat transfer to supercritical water in inclined upward smooth tubes [J]. Heat Transfer Engineering, 2007, 27(9): 44-52.
WU Gang, BI Qincheng, WANG Han, et al. Heat transfer characteristics of supercritical water in inclined upward tube [J]. Journal of Xi'an Jiaotong University, 2011, 45(5): 6-11.
WANG Weishu, CHEN Tingkuan, LUO Yushan, et al. Experimental research on wall temperature distribution and heat transfer characteristics of the tilted smooth riser tubes in the supercritical pressure region [J]. Power Engineering, 2005(5): 623-627.
LI Huixiong, SUN Shuweng, GUO Bin, et al. Experimental investigation on the circumferential ununiformity in heat transfer of water in inclined smooth upward tubes at supercritical pressures [J]. Journal of Engineering Thermophysics, 2008, 29(2): 241-245.
MA Xiongwei. Diagnosis and empirical analysis on multicollinearity in linear regression model [J]. Journal of Huazhong Agricultural University: Social Sciences Edition, 2008(2): 78-81.
XU Feng, GUO Liejin. Mixed convective flow and heat transfer of water in a helicoidal pipe under supercritical pressure [J]. Journal of Xi'an Jiaotong University, 2005, 39(9): 978-981.
LEI Xianliang, LI Huixiong, YU Shuiqing, et al. Numerical simulation on heterogeneous heat transfer in water at supercritical pressures in inclined upward tubes [J]. Chinese Journal of Computational Physics, 2010, 27(2): 217-228.