含盐水池沸腾特性及盐分影响因素研究  

Influence of Salt on Pool Boiling Heat Transfer of Saline Solution

作　　者：刘琦[1] 秦光宇[2,3] 李广徳[2,3] 吴玉新 刘青[1] 吕俊复[1] LIU Qi;QIN Guangyu;LI Guangde;WU Yuxin;LIU Qing;LÜJunfu(Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China;State Key Laboratory of Hydro-Power Equipment,Harbin Institute of Large Electric Machinery,Harbin 150000,China;Harbin Electric Machinery Company Limited,Harbin 150000,China)

机构地区：[1]清华大学能源与动力工程系,清华大学热科学与动力工程教育部重点实验室,北京100084 [2]水力发电设备国家重点实验室,哈尔滨大电机研究所,哈尔滨150000 [3]哈尔滨电机厂有限责任公司,哈尔滨150000

出　　处：《工程热物理学报》2022年第10期2687-2692,共6页Journal of Engineering Thermophysics

基　　金：清华大学山西研究院种子基金项目;水力发电设备国家重点实验室开放课题(No.SKLHE-ORF-202105)。

摘　　要：水资源在工业生产中不可或缺,在地球的水资源中,仅有2.5%为淡水,超过97%的水为含盐水。全球每年约4000多亿立方米含污水排放,造成严重的环境污染和经济治理成本问题。深入理解含盐水沸腾传热特性对于保证核电站、注汽锅炉、海水淡化中的传热安全具有重要意义。本文搭建了基于不同材质加热表面的核态池沸腾实验系统,通过热电偶梯度测温和可视化高速摄像技术测量得到热流密度、加热面温度、气泡脱离直径、脱离频率、生长速率等沸腾传热过程的关键参数。研究结果表明盐分的存在对沸腾传热起着一定程度的强化作用。Water is essential to industrial production. Only 2.5 percent of the earth’s water is fresh,and more than 97 percent is saline. More than 400 billion cubic meters of sewage are discharged every year, causing serious environmental pollution and economic control costs. In-depth understanding of boiling heat transfer characteristics of brine is of great significance to ensure the safety of heat transfer in nuclear power plants, steam injection boilers and seawater desalination. In this paper,a nucleated pool boiling experiment system based on heated surfaces of different materials was built. The key parameters of boiling heat transfer process, such as heat flux, temperature of heating surface, bubble detachment diameter, detachment frequency and growth rate, were measured by thermocouple gradient measurement and visual high-speed camera technology. The results show that the presence of salt enhances boiling heat transfer to a certain extent.

关 键 词：盐水溶液 池沸腾传热 汽泡行为 盐浓度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]