车用发动机-有机朗肯循环联合系统运行机理及协同控制理论研究

In this project, the method and mechanism of organic Rankine cycle for vehicle engine waste heat recovery are to be anylized, aiming at improving the thermal efficiency and reducing emissions of vehicle engine. According to both the fundamental of various disciplines including the theory of internal combustion engine, thermodynamics, contrology et al and the guiding ideology of cross- disciplines, the working mechanism of vehicle engine-organic Rankine cycle combined system is to be studied and the coordinated control theory will be explored by the combined method of theoretical analysis, numerical simulation and experimental study. The test-bench and the measurement and control system will be optimized on the basis of building the simulation model of vehicle engine-organic Rankine cycle combined system, then a series of studies will be carried out, which contains the operation mechanism of the organic working fluid in each component of the system under the whole operating conditions of vehicle engine, the influences of the organic working fluid on performances of the system, and the operation mechanism of each component of the system as well as the interaction mechanism among them. At last, the coordinated working mechanism of vehicle engine-organic Rankine cycle combined system will be revealed and a set of suitable coordinated control theories are to be proposed. Based on the research achievements of this project, the practical application of organic Rankine cycle for vehicle engine waste heat recovery can be supported theoretically and technically.

本项目以提高车用发动机热效率和降低排放为目标，分析利用有机朗肯循环系统回收车用发动机排气余热能量的方法与机理。根据内燃机学、热力学、控制理论等多学科的基本原理和学科交叉的指导思想，通过理论分析、数值模拟和试验研究相结合的方法，对全工况范围内车用发动机-有机朗肯循环联合系统的工作机理进行深入的研究，探索联合系统的协同控制理论。通过建立车用发动机-有机朗肯循环联合系统的仿真模型，完善与优化试验台架及测控系统，进而研究发动机全工况范围内有机工质在有机朗肯循环系统及其各部件中的工作机理，分析有机工质的工作参数对系统性能的影响，探索系统各部件的运行变化规律及相互作用机理，揭示全工况范围内车用发动机-有机朗肯循环联合系统的协同工作机理，提出适用于联合系统的协同控制理论。基于项目研究成果，可为有机朗肯循环余热回收系统在车用发动机上的实际应用提供理论和技术上的支持。

本项目以提高车用发动机热效率和降低排放为目标，分析了利用有机朗肯循环系统回收车用发动机排气余热能量的方法与机理。根据内燃机学、热力学、控制理论等多学科的基本原理和学科交叉的指导思想，通过理论分析、数值模拟和试验研究相结合的方法，对全工况范围内车用发动机-有机朗肯循环联合系统的工作机理进行了深入的研究。搭建了相关的试验系统，建立了车用发动机-有机朗肯循环联合系统的集成仿真模型， 研究了发动机全工况范围内有机工质在有机朗肯循环系统及其各部件中的工作机理，分析了有机工质的工作参数对系统性能的影响情况，探索了系统各部件的运行变化规律及相互作用机理，揭示了全工况范围内车用发动机-有机朗肯循环联合系统的协同工作机理，提出了适用于联合系统的协同控制策略。通过本项目研究成果，可为有机朗肯循环余热回收系统在车用发动机上的实际应用提供理论依据和技术支持。