区域型联合循环分布式联供系统优化设计的研究

发布时间：2018-06-16 22:15

本文选题：分布式 + 区域型　；参考：《华北电力大学》2013年硕士论文

【摘要】：环境、能源问题已经成为制约着我国经济可持续发展道路上的一个重要瓶颈。积极调整能源结构,改善能源产业的安全性,提高能源利用率,解决环境污染问题等已成为我国能源战略的重点。而分布式能源正是集节能、环保、经济、供能可靠性于一体的新型能源供应方式,其能源综合利用率高,对节能减排,减小电网峰谷差,提高供电安全和应急能力等都具有重要的意义,在我国拥有着广阔的发展前景。区域型分布式供能系统是一种建立在能量梯级利用概念的基础上,分散安置在用户需求侧的能源梯级利用、与可再生能源结合达到资源综合利用的技术。主要应用于城市工业园区、旅游集中服务区、生态园区、大型商业设施的区域型领域等。通过在负荷需求侧根据用户不同的能源需求,实现温度对口供应能源,从而将输送环节的损耗降至最低,实现能源利用效能的最大化,主要以燃气蒸汽联合循环为主。本文介绍了区域型分布式供能系统的概念、组成、基本原理,并对区域型联合循环分布式供能系统的设备选型原则进行了阐述。根据分布式供能系统的特点,在建立的分布式供能系统模型的基础上,利用技术经济学原理,建立了分布式供能系统的经济性评价模型和分布式供能系统的节能减排的评价模型。综合考虑能源价格、负荷特性、税率、投资、运行维护等因素,采用以能流网络为基础的能源规划数学方法建立了区域型分布式供能系统优化模型,对分布式供能系统进行了配置优化和运行优化,实现系统运行的最佳能源利用效率和经济性的目标。以某区域型工业园区为应用对象,根据指标法对其冷热电负荷进行计算,开展了园区分布式供能系统的设计研究,对两种典型供能方案进行系统优化、运行优化和逐时负荷的热力计算。利用分布式供能系统的经济性评价模型,对影响分布式供能系统经济性的一些关键因素--天然气价格、电价、售冷价格、售热价格、固定资产投资等进行了分析,得最佳分布式供能系统方案。其研究结果对于区域型联合循环分布式供能系统的推广和应用有重要意义。
[Abstract]:Environmental and energy problems have become an important bottleneck on the road of sustainable economic development in China. Adjusting energy structure actively, improving the safety of energy industry, improving energy utilization ratio and solving the problem of environmental pollution have become the focus of our country's energy strategy. Distributed energy is a new type of energy supply mode which integrates energy conservation, environmental protection, economy and reliability of energy supply. Its comprehensive energy utilization ratio is high, energy saving and emission reduction is reduced, and the peak and valley difference of power grid is reduced. It is of great significance to improve the power supply safety and emergency ability, and has a broad development prospect in our country. Regional distributed energy supply system is a kind of technology which is based on the concept of energy cascade utilization, distributed in the user demand side, and combined with renewable energy to achieve comprehensive utilization of resources. Mainly used in urban industrial parks, tourism service areas, ecological parks, regional areas of large commercial facilities, etc. According to the different energy demand of the user on the load demand side, the energy supply can be realized at the corresponding temperature, thus reducing the transmission loss to the minimum and maximizing the energy utilization efficiency, mainly in the combined cycle of gas and steam. This paper introduces the concept, composition and basic principle of regional distributed energy supply system, and expounds the equipment selection principle of regional combined cycle distributed energy supply system. According to the characteristics of distributed energy supply system, based on the model of distributed energy supply system, the principle of technical economics is used. The economic evaluation model of distributed energy supply system and the evaluation model of energy saving and emission reduction of distributed energy supply system are established. Considering the factors of energy price, load characteristic, tax rate, investment, operation and maintenance, the optimization model of regional distributed energy supply system is established by using the energy planning mathematical method based on energy flow network. Configuration optimization and operation optimization of distributed energy supply system are carried out to achieve the goal of optimal energy utilization efficiency and economy. Taking a regional industrial park as the application object, according to the index method to calculate the cooling and heat power load, the design of distributed energy supply system in the park is studied, and the two typical energy supply schemes are optimized. Operation optimization and thermodynamic calculation of hourly load. Based on the economic evaluation model of distributed energy supply system, this paper analyzes some key factors that affect the economy of distributed energy supply system-natural gas price, electricity price, cold price, heat price, fixed assets investment, etc. The optimal scheme of distributed energy supply system is obtained. The research results are of great significance to the popularization and application of regional combined cycle distributed energy supply system.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU99

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