![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
ABSTRACT
Supercritical water is widely used in many advanced single-phase thermosiphons due to its favorable heat and mass transfer characteristics and potentially high thermal efficiency. However, the heat transfer characteristics of supercritical water in the deterioration regime cannot be accurately predicted due to the absence of exact evaluation of the effect on steep variation in thermophysical properties near the pseudocritical point. The present paper focuses on the deterioration mode by analyzing the physical mechanism and constructing a new correlation. About 3,000 experimental data on supercritical water, including 40 deteriorated heat transfer cases from open literature, were collected. Quantitative assessment of heat transfer behavior was conducted based on existing test data and previous criteria gathered from extant literature. Based on experimental data evaluation and phenomenological analysis, an improved dimensionless correlation is proposed by introducing multi-dimensionless parameters, which can correct the deviation of heat transfer from its conventional behavior in the Dittus-Boelter equation. Comparisons of various heat transfer correlations with the selected test data show that the new correlation agrees better with the test data versus other correlations selected from the open literature.
Acknowledgments
The authors acknowledge the support of the National Basic Research Program of China (973 Program) (Grant No. 2015CB251502), the National Natural Science Foundation of China (Grant No. 50876090), China Postdoctoral Science Foundation (No. 2015M570840), and the Fundamental Research Funds for the Central Universities.
Additional information
Funding
Notes on contributors
Xianliang Lei
Xianliang Lei is currently a lecturer at State Key Laboratory of Multiphase Flow in Power Engineering of Xi'an Jiaotong University, Xi'an, China. His research interests are in the high-temperature and high-pressure liquid-vapor two phase flow and heat transfer.
Yumeng Guo
Yumeng Guo is a postgraduate at State Key Laboratory of Multiphase Flow in Power Engineering of Xi'an Jiaotong University, Xi'an, China. Her research interests are in the heat transfer of supercritical fluids.
Weiqiang Zhang
Weiqiang Zhang is a doctoral candidate at State Key Laboratory of Multiphase Flow in Power Engineering of Xi'an Jiaotong University, Xi'an, China. His research interests are in the heat transfer enhancement.
Huixiong Li
Huixiong Li is a professor at the State Key Laboratory of Multiphase Flow in Power Engineering at Xi'an Jiaotong University, Xi'an, China. His research interests include the theoretical and experimental study of multiphase flow and heat transfer, numerical simulation of gas–liquid two-phase flows, heat transfer enhancement, and thermal hydraulics of thermal power systems and nuclear reactors.
Liangxing Li
Liangxing Li is an associate professor at the State Key Laboratory of Multiphase Flow in Power Engineering at Xi'an Jiaotong University, Xi'an, China. His research interests are in theoretical and experimental study on severe reactor accident.