| 摘要: |
| 在能源互联网时代，区域供冷供热系统将由原本单一形式的热源向多种形式热源并存转变，尤其是可再生能源和未利用能源。不同形式不同品味的热源集成必将引起系统能量变化。能源总线系统是集成化规模化应用区域内可再生能源及未利用能源的多源多用户能源系统。本文针对能源总线系统相对常规分散系统而言特有的多源多用户特征进行系统混水和热回收过程的?变分析。将能源总线系统抽象为一系列工作在高温热源和低温热源之间的劳伦兹循环的集成。通过建立能源总线系统与常规分散系统的理想热力学模型，利用热力学原理进行理论分析，找到能源总线系统混水和热回收过程?变的规律及影响因素。结果表明：系统?的变化与各子系统低温热源进出口温度、高温热源进口温度以及高低温热源质量流量比相关，不同的设计参数会导致混水过程能量发生增加或者减小，亦或者不变。通过分析得到热回收过程通过分析得到影响源侧总线热量变化的相关参数并找到热量变化规律，并得到最佳总线供水温度T_EBS1的确定方法。 |
| 关键词: 能源总线系统 能源规划 劳伦兹模型 热回收 㶲 |
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| Analyses of Exergy Change in Multi Heat Source Water Mixing and Heat Recovery Process of Energy Bus System |
| Wang Peipei,Long Weiding |
| (School of Mechanical Engineering, Tongji University;College of Engineering in Germany) |
| Abstract: |
| In the internet era of energy, district heating and cooling system will change from a single form of energy to the various forms of energy, especially renewable energy and untapped energy. Integration of different grades of heat sources will cause system energy change. The energy bus system is a multi-source and multi-user thermal energy system that can make integration of renewable energy sources or untapped energy sources in large scale for district heating and cooling. This paper focus on analysis of exergy change in multi-source water mixing and heat recovery process of energy bus system comparing with the conventional system. The energy bus system can be modeled as integration of a series of Lorenz cycles. Through the theoretical analysis of the ideal thermodynamic model of energy bus systems and conventional distributed systems, exergy change law and its influencing factors in multi-source water mixing and heat recovery process of energy bus system are analyzed. Results show that many factors affect exergy change of multi-source system. Different design parameters can cause the energy to increase or decrease, or unchanged. In this paper, heat recovery process of energy bus system is also analyzed theoretically, and the related parameters which affect the heat change of the bus side are obtained and the heat variation law is found, also the way to get the optimum bus water temperature T_EBS1. |
| Key words: energy bus system energy planning Lorenz model heat recovery exergy |
