高温蒸汽凝结法相对湿度测量  

Measurement of relative humidity for high temperature steam by condensation method

作　　者：高琳锋[1] 徐志军 梁俊钦 张彩良 皇甫永春 陈建利[1] Gao Linfeng;Xu Zhijun;Liang Junqin;Zhang Cailiang;Huangfu Yongchun;Chen Jianli(China Institute for Radiation Protection,Taiyuan 030006,China;Fujian Ningde Nuclear Power Co.,Ltd.,Ningde 355000,China;CGN Huizhou Nuclear Power Co.,Ltd.,Huizhou 516003,China)

机构地区：[1]中国辐射防护研究院,太原030006 [2]福建宁德核电有限公司,宁德355000 [3]中广核惠州核电有限公司,惠州516003

出　　处：《国外电子测量技术》2024年第7期140-147,共8页Foreign Electronic Measurement Technology

基　　金：国防科工局乏燃料后处理科研专项(KY20007)资助。

摘　　要：为实现露点温度100℃以上高温压力蒸汽相对湿度的精确测量,设计了以凝结称重装置、不凝气体含湿量测量装置、数据处理系统为核心部件的凝结法相对湿度测量系统。测量系统依据蒸汽相对湿度与含湿量对应关系,采用蒸汽快速凝结,实时监测冷凝液质量与不凝气流含湿量的方式实现了目标蒸汽所处温度、压力条件下相对湿度的在线测量。凝结法测量工艺能实现露点温度-40℃~130℃条件下气体相对湿度0.15%~100%范围内的有效测量。在露点温度128℃、相对湿度95%条件下,测量不确定度0.59%,测量偏差小于0.4%,具有测量精度高、测量速率快的特点。该系统能开展瞬态条件下蒸汽相对湿度测量,湿度测量值能溯源到国际单位制基本单位。In order to accurately measure the relative humidity of high-temperature and high-pressure steam with a dew point temperature above 100℃,a relative humidity measurement system based on the condensation method has been designed,with the main core components including a condensation weighing device,a non-condensable gas humidity measurement device and a data processing system.Based on the relationship between steam relative humidity and moisture content,the measurement system realizes the online measurement of steam relative humidity value under the temperature and pressure conditions of the target steam by real-time monitoring of condensate quality and noncondensable gas moisture content.The condensation method can effectively measure the relative humidity of the gas in the range of 0.15%~100%under the condition of dew point temperature of-40℃~130℃.The measurement uncertainty of the condensation method is 0.59%at the steam dew point temperature of 128℃and the relative humidity of 95%,and the relative humidity measurement deviation is less than 0.4%.It has the characteristics of high measurement accuracy and fast measurement rate.This system can realize the instantaneous measurement and can realize the traceability of the international system of units(SI)of the relative humidity value.

关 键 词：蒸汽凝结 湿度测量 瞬态条件 计量溯源 

分 类 号：TB943[一般工业技术—计量学] TH837[机械工程—测试计量技术及仪器]