过冷盐溶液流动沸腾传热预测关联式  

Heat transfer correlation for subcooled flow boiling of saline solutions

作　　者：顾君苹 刘琦[1] 吴玉新[1] 王庆功 吕俊复[1] GU Junping;LIU Qi;WU Yuxin;WANG Qinggong;LYU Junfu(Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China;Qian Xuesen Laboratory of Space Technology,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]清华大学能源与动力工程系,热科学与动力工程教育部重点实验室,北京100084 [2]中国空间技术研究院钱学森空间技术实验室,北京100094

出　　处：《清华大学学报（自然科学版）》2021年第12期1397-1404,共8页Journal of Tsinghua University(Science and Technology)

基　　金：国家重点研发计划项目(2017YFB0602102);清华大学-中国华能集团有限公司基础能源联合研究院项目(U20YYJC10)。

摘　　要：为保证以含盐溶液为工质的蒸发换热设备内的水动力及传热安全,要求能够对盐溶液在受热管内的传热特性实现准确预测。该文开展了垂直上升受热管内NaCl溶液传热实验,获得了盐溶液管内强迫对流及过冷流动沸腾传热系数实验值。基于实验结果,校验了现有传热预测关联式对盐溶液不同传热阶段的传热预测准确性。结合公开报道中的盐溶液及纯水的传热数据进行分析,获得了可用于表征盐溶液过冷流动沸腾传热变化的主要参数及影响规律,据此建立了适应于盐溶液的过冷流动沸腾传热预测关联式,该关联式的预测准确性高,对指导和优化此类换热设备的设计、提高工业生产安全具有重要价值。Accurate predictions of the heat transfer characteristics of saline solutions is of great importance for modeling the hydrodynamics and heat transfer in evaporative heat exchangers using saline solutions as the heat transfer medium. The heat transfer characteristics of NaCl solutions in a vertical heated tube were investigated experimentally to determine the heat transfer coefficients of NaCl solutions for single-phase forced convection and subcooled flow boiling conditions. The present experimental data was used to verify the prediction accuracies of existing heat transfer correlations for saline solutions. The experimental heat transfer data for saline solutions and pure water were compared to identify the main factors characterizing the heat transfer coefficient variations. A new heat transfer correlation is presented that accurately predicts the subcooled flow boiling heat transfer coefficient of saline solutions for the design and safe operation of industrial applications.

关 键 词：传热关联式 盐溶液 过冷流动沸腾 强迫对流 

分 类 号：TK121[动力工程及工程热物理—工程热物理]