物理学 13-5循环过程卡诺循环 第五版 3循环过程( Thermodynamic cyclic process): 系统由某一平衡态出发经过任意的一系 列中间过程,又回到原来的平衡态的整个过程。 A system starting a equilibrium state goes through a process which is composed of series of intermediate processes of the change of state then the system return to its original equilibrium state. cvcle 4准静态的循环过程 (Quasi-static thermodynamic cycle process): 循环过程每一中间过程都是准静态过程。 Each intermediate processes of the cycle is all the quasi-static process. 第十三章热力学基础 11/40
13-5 循环过程 卡诺循环 第十三章 热力学基础 物理学 第五版 11/40 一系统由某一平衡态出发经过任意的一系 列中间过程，又回到原来的平衡态的整个过程。 3,循环过程(Thermodynamic cyclic process) ： A system starting a equilibrium state goes through a process which is composed of series of intermediate processes of the change of state & then the system return to its original equilibrium state. cycle 循环过程每一中间过程都是准静态过程。 4,准静态的循环过程 (Quasi-static thermodynamic cycle process) : Each intermediate processes of the cycle is all the quasi-static process
物理学 13-5循环过程卡诺循环 第五版 5P图( P-v diagram).P A (4)PV图上封闭曲线与准 静态循环过程是一一对应 A closed curve on p-y diagrams is one to one correspondence wu O a quasi-Stanic cycle 准静态循环过程 PV图封闭曲线 Closed curve Quasi-static cycle on p-y diagrams 第十三章热力学基础 12/40
13-5 循环过程 卡诺循环 第十三章 热力学基础 物理学 第五版 12/40 P O V P-V 图封闭曲线 Closed curve on P-V diagrams 准静态循环过程 Quasi-static cycle 5,P-V图(P-V diagram): A (4)P-V图上封闭曲线与准 静态循环过程是一一对应 A closed curve on P-V diagrams is one to one correspondence with a quasi-static cycle
物理学 13-5循环过程卡诺循环 第五版 6,特征( Features): A 系统的内能不变,只是 系统和外界有机械功和 热量交换。即将热转换 为功或将功转换为热。 O After the system finishes a cycle its internal energy has not changed, between the system the exterior there only is exchange of mechanical work& heat. that is that convert heat into work or convert work into heat 第十三章热力学基础 13/40
13-5 循环过程 卡诺循环 第十三章 热力学基础 物理学 第五版 13/40 6,特征(Features)： 系统的内能不变，只是 系统和外界有机械功和 热量交换。即将热转换 为功或将功转换为热。 After the system finishes a cycle its internal energy has not changed, between the system & the exterior there only is exchange of mechanical work & heat. that is that convert heat into work or convert work into heat P O V A Q W
物理学 13-5循环过程卡诺循环 第五版 二热机及效率( Heatengine& Efficiency) 1,正循环P图上顺时针过程PA Positive cycle: The clockwise cyclicprocesses on P-v diagram 2,特征:系统的内能不变 B Features: Unchange of the internal energy of the system O 3,净功:整个过程是系统对外界做净功,其数 值等于曲线所围的面积 Net work: In whole cyclic process the net work done by the system on the exterior it is equal to the encompassed area of cycle curve 第十三章热力学基础 14/40
13-5 循环过程 卡诺循环 第十三章 热力学基础 物理学 第五版 14/40 1,正循环:P-V图上顺时针过程 二 热机及效率(Heat engine & Efficiency) Positive cycle: The clockwise cyclic processes on P-V diagram 2,特征:系统的内能不变 Features: Unchange of the internal energy of the system P o V A B c d 3,净功:整个过程是系统对外界做净功，其数 值等于曲线所围的面积。 Net work: In whole cyclic process the net work done by the system on the exterior it is equal to the encompassed area of cycle curve