高温环境下相对湿度测量误差及干湿球系数计算

上帝

黄晓因[1] 徐丽芬[2]
[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
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％。[著者文摘]

Measuring Error Analysis of Relative Humidity and Calculation of Psychrometric Coefficient at High TemperatureHuang XiaoYin;Xu LiFenHuang XiaoYin;Xu LiFenAbstract: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.[著者文摘]

Key words:psychrometer coefficient, ambient temperature, relative humidity, calculation