高溫環境下相對濕度測量誤差及干濕球系數計算

黃曉因[1] 徐麗芬[2]
[1]云南農業大學計算機科學系,昆明650201 [2]云南農業大學氣象教研室,昆明650201
摘　要:對干濕球系數A與環境溫度t的關系進行了研究。結果指出，A不僅與風速有關，也與環境溫度有關，如果不考慮風速和環境溫度，使用干濕球測濕法獲得的測量結果沒有使用價值。t〉40℃以后，隨著t的升高，使用A的擬合公式計算得到的相對濕度值其誤差愈來愈大，在相對濕度較低時情況更為明顯。為此提出了在40℃〈t〈80℃范圍內A的計算公式。經驗證，使用此計算公式獲得A值后再計算出相對濕度，其誤差小于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