【摘要】 指出火用本性上不是严格意义上的状态函数,给出了在无限大环境参考态下多相系统火用函数一般表达式。该表达式可以被推广应用于无限大的热源和物质源,体现了火用定义和火用函数表达式的唯一性和热力学一致性。将火用和“火用变化”严格区分,避免了关于火用概念热力学本性的误解和争论,结束了现行教材中火用的模型、类别和表达式的多样化局面。最后为任意状态下的均相系统火用函数的数值计算提供了一般思路和基本公式。更多还原

【Abstract】 That exergy is not a state function was specified.A general theoretical expression of exergy was obtained by extending its applications to special systems,like heat reservoirs and matter reservoirs.The uniqueness of exergy expression and the thermodynamic consistence with its concept were illustrated.A clear distinction was drawn(between) exergy and exergy change,which is helpful to avoid misunderstandings and unnecessary disputes about the concept of exergy.The basic formulae and general approach for the calculation of the numerical values of exergy of a homogeneous mixture were presented.更多还原