Z函數圖解積分法計算氣體逸度

A Calculation Method on Gas Fugacity by Z Function of Graphcial Integation

摘要: 本文討論了傳統計算氣體逸度的準確方法——α函數圖解積分法,在實際計算中的麻煩和誤差。并指出了當壓力趨近于零而α函數不為零的原因。
本文提出的Z函數圖解積分法,利用原試驗數據僅改變圖解積分的函數形式,就克服了α函數法的缺點,并指出了α函數法計算誤差的性質,又為Z函數近似計算法的應用條件和適用范圍做了說明,從而得到一個在理論解釋和計算誤差上,都優于α函數的方法。具有實際意義的是,Z函數法可估計出氣體服從理想氣體方程式的壓力范圍。

Abstract: A calculation method of gas fugacity,traditional a function method,has been discussed on its complexity and error.The error of a function method consists in the inequality between its value and that value when the pressure is close to zero. The substitution of Z function for a function, it shows that the deficiency of a function can be overcomed. The conditions and range of applications of Z function are also explained.One of the advantages is to estimate the field of pressure that obeies the perfect gas law so that it is used widely in practice.