混合动力燃气热泵的优化分析及控制模拟

发布时间：2018-04-14 19:20

本文选题：混合动力 + 燃气热泵　；参考：《东南大学》2015年硕士论文

【摘要】：当今世界能源与环境成为日益重要的两大主题,清洁能源的使用和节能技术的开发越来越得到人们的重视。随着人们对生活水平要求的提高,人们对室内空气品质的要求愈来愈高,空调运用得到了普及。有数据显示我国空调能耗占建筑总能耗55%,而且对环境的压力也越来越大。燃气热泵由于具有相对较高的一次能源利用率,具有较好的部分负荷特性,对环境的污染较小,尤其在供热的情况下具有更好地效果,且其可以调节高峰用电动时的电力短缺问题,平衡电网峰谷周期,在欧美国家得到广泛的运用,在我国也渐渐受到重视。与相比普通的燃气热泵系统,混合动力燃气热泵系统可以使燃气发动机始终工作在经济区内,本文主要研究的是一种具有连续传动比的混合动力燃气热泵系统,通过改变传动比,燃气发动机的转速可以不受压缩机转速的限制,从而使燃气发动机可以工作在更加节能的状态,本文的主要研究内容包括以下几个方面：(1)设计了一种具有可变传动比的燃气热泵系统。本文中提出了一种具有连续传动比的混合动力燃气热泵系统,该系统主要包括三个部分：驱动系统,变速器和热泵系统。混合动力燃气热泵系统有四种运行模式：燃气发动机单独驱动模式,电机单独驱动模式,燃气发动机驱动并充电模式,燃气发动机和电机共同驱动模式。本文详细分析了四种工作模式下系统的能量流动过程。(2)建立了混合动力燃气热泵系统的数学模型。混合动力燃气热泵系统的建模主要包括三个部分的建模：驱动系统的建模,变速器的建模和热泵系统的建模。动力驱动系统的建模主要包括燃气发动机,电机及蓄电池的建模。本文对燃气发动机采用实验建模的方法,建立了燃气发动机的万有特性曲线模型。同样对电机运用实验建模的方法得到电机的充放电效率模型。热泵系统的建模主要包括压缩机,冷凝器,蒸发器,节流阀等部件的数学模型的建立。变速器是链接热泵系统和动力驱动系统的桥梁,本文根据变速器的输入与输出关系建立变速器的数学模型。(3)基于逻辑门限的控制策略逻辑门限的控制策略是指过制定合理的逻辑规则来改变和调节驱动系的工作状态,使发动机运行在最佳油耗曲线附近,以达到系统高效率、低排放的目标。本章将采用静态逻辑门限控制策略,将压缩机对驱动系统的需求功率设为门限值,再根据蓄电池的SOC状态,选择合理的燃气发动机和电机的工作点。并假定了系统在一个周期内外界的负荷需求,建立了基于Matlab/simulink的模拟平台,模拟在一个周期内系统的运行情况。(4)基于瞬时优化的控制策略瞬时优化是指在当前一个外界负荷的需求下,驱动系统如何在燃气发动机和电机之间合理的分配功率,已达到瞬间系统最佳运行状态,瞬时优化的控制策略需要一个优化参数。本文选择驱动系统的等效瞬时燃气耗量作为优化参数,并在设定的外界负荷的条件下同基于逻辑门限的控制策略进行了比较,结果显示瞬时优化的控制策略相对于逻辑门限的控制策略具有较好的节能效果。
[Abstract]:Energy and environment have become the two major themes in today's world is becoming more and more important in the development and use of energy-saving technology, clean energy has gained more and more attention. With the requirements of people's living standards improve, people on indoor air quality requirements more and more high, the use of air conditioning has been popularized. Data show that air-conditioning energy consumption in China accounted for the construction the total energy consumption of 55%, and the pressure on the environment is also growing. As a result of a gas heat pump energy has relatively high utilization rate, has good partial load characteristic, less pollution to the environment, especially has better effect on heating condition, and it can be used when the electric power shortage peak regulation the balance of power, peak period, has been widely used in Europe and the United States, in China's attention gradually. Compared with the ordinary gas heat pump system, hybrid gas heat pump system can make The gas engine is working in the economic area, the main research of this paper is a continuous transmission ratio of the hybrid gas heat pump system, by changing the transmission ratio, gas engine speed is not affected by the rotational speed of the compressor, so the gas engine can work in a more efficient state, the main contents of this paper include the following: (1) design with a variable transmission ratio of gas heat pump system. This paper presents a continuous transmission ratio of the hybrid gas heat pump system, the system mainly includes three parts: driving system, transmission system and heat pump. The hybrid heat pump system has four operation modes: gas engine driven mode, motor driven mode, gas engine driven and charging mode, the gas engine and motor driven mode. This paper is divided Analysis of the energy flow process of four kinds of work mode system. (2) to establish the mathematical model of hybrid heat pump system. The hybrid modeling of gas heat pump system mainly includes three parts: modeling modeling modeling modeling of the drive system and heat pump system transmission. The main drive system modeling including gas engine, motor and battery modeling. Experimental modeling of the gas engine in this paper, a universal curve model of gas engine. Also the charge discharge efficiency of the motor on the motor using the method of model experiment modeling. The modeling of heat pump system mainly comprises a compressor, condenser, evaporator, throttle valve, mathematical model component. The transmission is a bridge to link the heat pump system and drive system, this paper established the transmission according to the relationship between input and output transmission. The mathematical model (3). The control strategy of logic threshold control strategy based on logic threshold refers to logical rules and reasonable to change and adjust the drive system working condition, make the engine run in the vicinity of the optimal fuel consumption curve, in order to achieve the system of high efficiency, low emissions. This chapter will use the static logic threshold control strategy. The power demand of the drive system of the compressor is set to the threshold value, then according to the SOC of accumulator, gas engine and motor to choose reasonable work. And assume that the system in a periodic external load demand, simulation platform was established based on Matlab/simulink simulation operation system in a period. (4) the optimization of control strategy based on instantaneous instantaneous optimization refers to a current external load demand, allocation of power drive system between gas engine and electric motor is reasonable, Has reached the best operation state instantaneous system, control strategy instantaneous optimization requires a parameter optimization. This paper chooses the equivalent instantaneous gas drive system consumption as optimization parameters, and based on the logic threshold control strategy are compared in the external load setting conditions below, results show that the instantaneous optimization control strategy with respect to the control logic the threshold has a better energy saving effect.

【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU831

【参考文献】