论文部分内容阅读
引言热力学能量方程式,即热力学第一定律的数学表达式,是工程热力学的重点内容之一,在工程上有广泛的应用。随着科学技术的发展,能量方程由开始简单的形式,逐渐发展成为比较复杂的完善形式。五十年代,在《工程热力学》的著作或教材中,主要阐述无流动热力系(或称闭口热力系)的能量方程。由于是从能量守恒定律直接导出的,方法简便,方程形
Introduction The thermodynamic energy equation, the mathematical expression of the first law of thermodynamics, is one of the key elements of engineering thermodynamics and has a wide range of applications in engineering. With the development of science and technology, the energy equation has evolved from a simple form to a more complex and perfect form. In the fifties, in the book “Engineering Thermodynamics” or teaching materials, it mainly expounds the energy equation of non-flowing thermodynamic system (or closed thermodynamic system). Because it is derived directly from the law of conservation of energy, the method is simple, the equation