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本文从不可逆过程有效能消耗率分析出发,提出一种表征不可逆过程的新参数一不可逆度,定义为不可逆过程的总有效能消耗率与总输入或输出能流流率之比值;在提出热力系的势能概念和多种形态能量的有效能定义式的基础上,阐述了有效能消耗率方程,有效能消耗源强度,有效能消耗率最小原理,给出并比较了有效能消耗率与熵产率和(火积)耗散率的关系;有效能消耗率与过程的能流率量纲一致,克服了熵产率和(火积)耗散率与能流率量纲不一致的缺点;不可逆度的物理意义是不可逆过程有效能消耗系数或功耗系数,与热力循环效率互补.
In this paper, starting from the analysis of the irreversible process energy consumption rate, a new parameter, Irreversibility, is proposed to characterize the irreversible process, which is defined as the ratio of the total effective energy consumption rate to the total input or output energy flow rate. Based on the concept of potential energy and the definition of the effective energy of various forms of energy, this paper expounds the effective energy consumption rate equation, the effective energy consumption source intensity and the minimum energy consumption efficiency principle, gives and compares the effective energy consumption rate and entropy And the relationship between the rate of energy dissipation and the rate of dissipation (the product of fire volume). The effective energy consumption rate is consistent with the energy flow rate of the process, which overcomes the shortcomings of the entropy yield and the dissimilarity of energy dissipation rate and energy flow rate. The irreversible physical meaning is the irreversible process of effective energy consumption coefficient or power coefficient, and the efficiency of the thermodynamic cycle complement each other.