摘要
采用传热传质理论结合相对湿度试验分析干湿球系数的影响因素和变化规律。结果表明,干湿球系数主要受对流传热和传质特性的影响,是温度和风速的函数,且随温度的升高或速度的减小而增大。湿度查算表和史密森气象用表适用于20℃～40℃、2. 5m/s～5m/s环境;常用经验式和Huang拟合式可在0. 1m/s～5m/s风速范围内使用,但前者适用于常温(20℃～40℃)环境,后者适用于高温(60℃～80℃)环境。通过非线性回归构建干湿球系数模型,模型预测干湿球系数在0. 1m/s～5m/s、20℃～80℃范围内的误差<1. 5%。
The influence factors and change laws of the psychrometer constant were analyzed by heat and mass transfer theox-y combined with the relative humidity tests. It shows that the psychrometer constant is mainly affected by the convective heat and mass transfer and is a function of the temperature and the wind speed. And the psy chrometer constant increases as temperature increases or wind speed decreases. Humidity table and Smithsonian weather table are suitable for environments of 20℃ -40℃ , 2.5m/s -5m/s; The commonly used empirical formula and Huang fitting formula can be used in the range of 0. lm/s - 5m/s, but the former is suitable for normal temperature （20℃-40℃）, and the latter is suitable for high temperature （60℃- 80℃）. The psychrometer constant model was constructed by nonlinear regression. And the error predicted from the psychrometer constant model is less than 1.5% in the scope of 0. lm/s -5m/s, 20℃ -80℃.
作者
王云鹤
程志明
金士英
赵文超
吴珂
朱凯
Wang Yunhe;Cheng Zhiming;Jin Shiying;Zhao Wenchao;Wu Ke;Zhu Kai
出处
《计量与测试技术》
2018年第11期6-9,共4页
Metrology & Measurement Technique
基金
基于大空间气流组织和智能控制的地下建筑高效空气调节系统开发(2011C11080)
隧道火灾风险识别及安全保障技术研究与应用(2018C03029)
关键词
相对湿度
干湿球系数
适用范围
温度
风速
relative humidity
psychrometer constant
application range
temperature
wind speed
