论工程热力学中pv的性质

来源期刊：中南大学学报(自然科学版)1989年第2期

论文作者：周昊

文章页码：155 - 161

关键词：功； 能； 过程函数； 状态函数； 开口系统

Key words：energy； path funtion； state function； open loop systems

摘    要：本文在正确理解功与能,过程量与状态参数等基本概念的基础上,论证了在工程热力学中,pv的物理意义应理解为推动功(或称流动功),而不能理解为工质自身所具有的某种能,如压力势能或流动能等。

Abstract: In engineering thermodynamics, different understandings of pv involvethe recognitions of basic conceptions on physical meaning of enthalpy, on quan-tity of process and parameter of state, on work and energy. For this reason, itis necessary to discuss the property of pv. Based on the correct understanding of theconcepts of work and energy, quantity of process and parameter of state, it isproved in this paper that the physical meaning of pv in engineering thermodyna-mics should be understood as the push work (or flow work) but not certain ener-gy of flow in itself, such as pressure-potential energy, etc.