循环过程中状态参量的乘积规律分析

Analysis of a Product Rule in State Parameters of the Cycle Process

讨论了由四个常见热力学过程组成的四状态循环过程和任意循环过程中状态参量在不同状态时的数值关系,发现循环中状态参量在不同状态时的数值的不同次幂的乘积等于1,其次幂正好是要讨论状态参量和另一状态参量的一次幂表示的循环中相邻过程的过程方程中该状态参量次幂的差.在应用中可以直接根据这一规律写出状态参量在不同状态时的数值关系,简化推导和计算过程,为教学和实际应用提供一定的借鉴.

This paper discusses the numerical relations of state parameters of the four states circulation composed by four kinds of thermodynamics process and any cyclic process.The results show that：the product of the different power of different state parameters is 1;the power just to the dispersion of the powers of the adjacent process when the cycle was expressed with the state parameter and the first power of other state parameters.In using,the numerical relations of the state parameters in a different state can be directly write and the application of this rule can simplify the derivation and calculation process,The rule can provide a reference for teaching and practical application.