系统思维在工程热力学课程中的应用

Research on the Application of Systematic Thinking in the Engineering Thermodynamics Course

系统思维强调立足于事物整体来认识和处理问题,工程热力学教学中需要系统思维。采用系统思维分析了能量平衡方程、熵平衡方程与[火用]熵平衡方程等用来处理实际工程问题时具有相同的表达方式:输入等于输出。通过一个工程算例,指出建立合适的控制体(系统),利用系统思维与各种衡算关系是解决热力学实际问题最常用的一种工程方法,有利于培养和开发学生的整体性思维。

Systematic thinking emphasizes understanding and handling problems based on the whole of things, which is needed in Engineering Thermodynamics teaching. In this paper, the energy balance equation, entropy equilibrium equation and the exergy balance equation are analyzed in the same way when they are used to deal with practical engineering problems: input is equal to output.Through an engineering example, it is pointed out that the most commonly used engineering method to solve the practical thermodynamic problems is to set up a suitable control system and make use of the relationship between system thinking and various accounts, which is beneficial to the cultivation and development of students’ holistic thinking.