高温环境下相对湿度测量误差及干湿球系数计算  

Measuring Error Analysis of Relative Humidity and Calculation of Psychrometric Coefficient at High Temperature

作　　者：黄晓因[1] 徐丽芬[2] 

机构地区：[1]云南农业大学计算机科学系,昆明650201 [2]云南农业大学气象教研室,昆明650201

出　　处：《气象科技》2005年第4期367-369,372,共4页Meteorological Science and Technology

摘　　要：对干湿球系数A与环境温度t的关系进行了研究。结果指出,A不仅与风速有关,也与环境温度有关,如果不考虑风速和环境温度,使用干湿球测湿法获得的测量结果没有使用价值。t>40℃以后,随着t的升高,使用A的拟合公式计算得到的相对湿度值其误差愈来愈大,在相对湿度较低时情况更为明显。为此提出了在40℃<t<80℃范围内A的计算公式。经验证,使用此计算公式获得A值后再计算出相对湿度,其误差小于1.4%。The relationship between psychrometric coefficient A and ambient temperature was studied. It was pointed out that when temperature is higher than 40 ℃ , the error of the relative humidity obtained according to the formula of psychrometric coefficient A increases with temperature. It is more evident when temperature is higher and relative humidity is lower. A new formula of coefficient A was presented and it has higher veracity. Tests indicate that the error of the relative humidity obtained according to the new formula is lower than 1.4 % RH.

关 键 词：干湿球系数 环境温度 相对湿度 计算方法 系数计算 测量误差 干湿球 高温环境 公式计算 风速 

分 类 号：P457[天文地球—大气科学及气象学] TU311.3[建筑科学—结构工程]