基于燃气内燃机的冷热电联供系统动态性能研究
发布时间：2018-11-08 16:41
【摘要】：随着国内外关于提高能源利用率的大力提倡,冷热电联供系统作为一种梯级能源利用方式已经逐渐成为未来研究和使用的主要趋势。虽然目前国内外针对冷热电联供系统也开展了很多研究工作,但还是基于稳态特性的研究较多,对基于整体系统的动态特性的理论研究较少。通过对一个基于燃气内燃机的冷热电联供系统进行动态特性模拟研究,可以掌握此类系统的动态运行规律,为实际系统的运行提出调节控制方法。以某个以内燃机为原动机的冷热电联供项目为基础,整理动态模拟所需数据,并利用已知的部分资料,对系统及吸收式制冷机内部进行参数选定。列出了系统中各种工质的物性经验公式,并用MATLAB编制成可调用的函数程序。在此基础上,利用平均值模型法对发电机组各子系统进行动态数学建模,并采用集总参数法对系统中各种换热器及吸收式制冷机建立动态数学模型。通过分析数学模型,提出相应的程序解法,利用MATLAB的SIMULINK子模块编制系统各部件及整体的程序。根据系统的各控制要素及流程,对发电机组和吸收式制冷机的负荷加载、负荷减载、关机及开机等动态工况进行模拟,在分析模拟结果的基础上,得到一些具有实际指导意义的结论。最后,列举出了系统的各种运行方案,并在模拟和分析的基础上,得到系统的动态运行规律,指导实际运行的调节控制。
[Abstract]:With the domestic and foreign efforts to improve energy efficiency, the combined cooling and heat supply system as a cascade energy use mode has gradually become the main trend of research and use in the future. Although a lot of research work has been done at home and abroad on the combined cooling and heating power supply system, there are still many studies based on the steady state characteristics, and there are few theoretical studies on the dynamic characteristics of the whole system. By simulating the dynamic characteristics of a combined cooling and heat supply system based on gas combustion engine, the dynamic operation law of this kind of system can be grasped, and the regulating control method for the actual system operation can be put forward. Based on a combined cooling and heat supply project with internal combustion engine as prime mover, the data needed for dynamic simulation are arranged, and the parameters of the system and absorption refrigerator are selected by using some known data. The experiential formulas of physical properties of various working fluids in the system are listed, and the transferable function programs are programmed by MATLAB. On this basis, the dynamic mathematical model of each subsystem of generator set is established by the mean value model method, and the dynamic mathematical model of various heat exchangers and absorption refrigerators in the system is established by lumped parameter method. By analyzing the mathematical model, the corresponding program solution is put forward, and the system components and the whole program are programmed by the SIMULINK submodule of MATLAB. According to the control elements and processes of the system, the load loading, load reduction, shutdown and startup of the generator set and the absorption refrigerator are simulated, and on the basis of the analysis of the simulation results, Some conclusions of practical significance are obtained. Finally, various operation schemes of the system are listed, and on the basis of simulation and analysis, the dynamic operation rules of the system are obtained to guide the regulation and control of the actual operation.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU83
[Abstract]:With the domestic and foreign efforts to improve energy efficiency, the combined cooling and heat supply system as a cascade energy use mode has gradually become the main trend of research and use in the future. Although a lot of research work has been done at home and abroad on the combined cooling and heating power supply system, there are still many studies based on the steady state characteristics, and there are few theoretical studies on the dynamic characteristics of the whole system. By simulating the dynamic characteristics of a combined cooling and heat supply system based on gas combustion engine, the dynamic operation law of this kind of system can be grasped, and the regulating control method for the actual system operation can be put forward. Based on a combined cooling and heat supply project with internal combustion engine as prime mover, the data needed for dynamic simulation are arranged, and the parameters of the system and absorption refrigerator are selected by using some known data. The experiential formulas of physical properties of various working fluids in the system are listed, and the transferable function programs are programmed by MATLAB. On this basis, the dynamic mathematical model of each subsystem of generator set is established by the mean value model method, and the dynamic mathematical model of various heat exchangers and absorption refrigerators in the system is established by lumped parameter method. By analyzing the mathematical model, the corresponding program solution is put forward, and the system components and the whole program are programmed by the SIMULINK submodule of MATLAB. According to the control elements and processes of the system, the load loading, load reduction, shutdown and startup of the generator set and the absorption refrigerator are simulated, and on the basis of the analysis of the simulation results, Some conclusions of practical significance are obtained. Finally, various operation schemes of the system are listed, and on the basis of simulation and analysis, the dynamic operation rules of the system are obtained to guide the regulation and control of the actual operation.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU83
【参考文献】
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