【摘要】 有机朗肯循环(Organic Rankine Cycle,ORC)是在传统朗肯循环中采用有机工质(如R113,R123等)代替水推动膨胀机做功的循环,本文根据集总参数法和能量守恒定律建立有机朗肯循环系统的数学模型,运用软件工程方程求解器(Engineering Equation Solver,EES)进行仿真研究,得到不同工况下有机朗肯循环系统热力特性的变化规律。研究结果表明,提高系统蒸发压力、降低系统冷凝压力以及选择效率尽可能高的膨胀机,可以提高有机朗肯系统循环热效率。仿真计算结果与实验数据二者吻合较好,表明所发展的数学模型可以满足有机朗肯循环热力系统仿真的要求。更多还原

【Abstract】 This paper presents the characteristics and properties of organic working fluids for Organic Rankine Cycle(ORC) and develops the mathematical model for ORC.The performance of ORC is simulated by the Engineering Equation Solver(EES).The large built-in data bank of thermodynamic properties in EES is helpful in solving problems of thermodynamics,fluid mechanics and heat transfer.The research results show that the efficiency of ORC can be improved by increasing the evaporation pressure,decreasing the condensation pressure and choosing the turbine with high efficiency.Lastly,the comparison of the simulated results with the experimental data shows a reasonable agreement between them,indicating that the developed simulation method can be used for the study of the performance of ORC.更多还原