热力学体系函数的正定性

The positive performance on exergy function of thermodynamic system

根据热力学体系的一般火用函数 ,给出封闭热力学体系的火用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 .上述结果对稳流体系低于环境压力下火用的计算亦不例外 .

According to general exergy function of thermodynamic system, the paper has given the general identification always being positive to exergy of the closed thermodynamic system, and points out that if these exists some difference of amount of intensity between the system and environment, the related outside may achieve the useful work when the system turns to its stationary state. When steady flow system is below the pressure of the environment, the calculation of the exergy is also without exception.