工质物性变量化的梯形循环一般性热力学规律  

THERMODYNAMIC PRINCIPLE OF TRAPEZOIDAL CYCLE WITH VARIABLE PROPERTIES OF WORKING FLUIDS

作　　者：李新国[1] 王伟[1] 翟哲[1] 南来福 王竞逸 Li Xinguo;Wang Wei;Zhai Zhe;Nan Laifu;Wang Jingyi(School of Mechanical Engineering, Tianjin University, Tianjin 300350, China)

机构地区：[1]天津大学机械工程学院

出　　处：《太阳能学报》2019年第6期1527-1535,共9页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51276122)

摘　　要：基于前期研究提出的梯形循环及其理论模型,建立工质饱和线形状(饱和液线斜率、饱和气线斜率与临界温度)及物性的自变量数学关系,进而建立循环性能(净输出功、热效率等)与工质饱和线及物性的数学模型,从理论角度研究工质性质对循环性能影响的一般性热力学规律,得到循环性能分别随工质的干、湿、等熵性质和工质饱和线斜率、临界温度、雅克比数及定压比热的变化规律。Based on the trapezoidal cycle and theoretical model established before,the relationships and mathematical formulas of the saturated line shape(saturation liquid line slope,saturated gas line slope and critical temperature)and properties of the working fluids to be as variables are built;then,the mathematical model of the cycle performances(net power output,thermal efficiency,etc.)with the saturation line and properties of the working fluid is established. The general thermodynamic principles of the working fluid properties influencing on the cycle performances was studied theoretically. The general principles of the cycle performances with the properties of working fluids including dry,wet and isentropic and the saturated line shape,critical temperature,Jakob number,specific heat,etc. are obtained,respectively.

关 键 词：有机朗肯循环 梯形循环 工质物性 热力学规律 

分 类 号：TK123[动力工程及工程热物理—工程热物理]