基于灰色关联度的超临界流体换热系数影响因素研究  

Study on Influencing Factors of Supercritical Fluid Heat Transfer Coefficient Based on Grey Correlation Degree

作　　者：李京坤 程进章 郭辉娟 许鹏 LI Jingkun;CHENG Jinzhang;GUO Huijuan;XU Peng(Qingdao Xingping Thermal Power Co.,Ltd.,Pingdu Shandong 266700,China;State Grid Shandong Pingdu Power Supply Company,Pingdu Shandong 266700,China;School of Nuclear Science and Engineering,North China Electric Power University,Beijing 102026,China)

机构地区：[1]青岛兴平热电有限公司,山东平度266700 [2]国网山东平度市供电公司,山东平度266700 [3]华北电力大学核科学与工程学院,北京102206

出　　处：《湖北电力》2022年第1期58-64,共7页Hubei Electric Power

基　　金：国家自然科学基金项目(项目编号:KZ21011282)。

摘　　要：为探究不同影响因素对超临界水及超临界CO_(2)两种超临界流体换热系数的影响程度,通过建立灰色关联度计算模型,对提取的超临界水及超临界CO_(2)试验数据进行分析,对比不同管道直径、压力、质量流速、入口温度等影响因素对超临界水及超临界CO_(2)换热系数的关联程度大小。研究结果表明:各因素对超临界水换热系数的影响程度为:质量流速>入口温度>压力>热流密度;各因素对超临界CO_(2)换热系数的影响程度为:质量流速>热流密度>入口温度>管径;对于两种超临界流体,质量流速均为影响换热能力的重要因素,而入口温度对换热系数的影响规律相反。In order to explore the influence of different factors on the heat transfer coefficient of two supercritical fluids:supercritical water and supercritical carbon dioxide,this paper first establishes a gray correlation model to analyze the extracted test data of supercritical water and supercritical carbon dioxide,and then compares the correlation degree of different influencing factors such as pipe diameters,pressures,mass flow velocities and inlet temperatures on the heat transfer coefficients of supercritical water and supercritical carbon dioxide.The research results are shown as below:The influence of each factor on the heat transfer coefficient of supercritical water is:mass flow velocity>inlet temperature>pressure>heat flux;the influence of each factor on the heat transfer coefficient of supercritical carbon dioxide is:mass flow velocity>heat flux>inlet temperature>pipe diameter;for both supercritical fluids,mass flow velocity is an important factor affecting the heat transfer capacity,while inlet temperature has the opposite effect on the heat transfer coefficient.

关 键 词：超临界流体 超临界水 超临界CO_(2) 灰色关联度 换热系数 

分 类 号：TL33[核科学技术—核技术及应用]