热力学体系函数的正定性

Positive Performance on Exergy Function of Thermodynamic System

根据热力学体系的一般函数 ,给出封闭热力学体系的恒为正的一般性证明 ,指出只要体系与环境存在强度量的差异 ,当体系变化到它的寂态时 ,相关外界就可获得有用功。

According to the general exergy function of thermodynamic system,the paper has made a general proof that the exergy of the closed thermodynamic system is positive and pointed out that if only these exists some difference on intensity amount between system and environment,the related outside could achieve the useful work when the system changes to its stationary state. The result mentioned above indication that calculation of the exergy is also with out exception when the system of steady flow is below the pressure of the environment.