自用楼宇型天然气分布式能源系统经济优化的动态模拟与分析
发布时间：2018-08-16 18:10
【摘要】：天然气分布式能源系统是一项以“温度对口、梯级利用”为原则，满足用户多负荷要求的能源生产和供应系统，具有较大节能减排优势，受到各国力推。我国近几年对天然气分布式能源的推广力度加大，国家发展和改革委员会提出了“十二五”建设目标，并指出为天然气分布式能源实行财政支持，而上海市已在更早的时候对天然气分布式能源实施了较大力度的补贴政策。但是财政补贴对行业发展只有短暂的促进作用，发展若要广泛持续还需要依赖天然气分布式能源本身的经济性。天然气分布式能源的经济性的影响因素多，涉及到多种复杂能源体系和定价问题。本文以天然气分布式能源系统中价格关系最为简单的自用楼宇型天然气分布式能源作为研究对象，将目前尚未普及的并网及上网政策作为研究的政策环境假设，，从而弱化政策和价格因素的不确定性，着重分析用户的负荷环境对天然气分布式能源系统经济性的影响。 本文以国内四大气候区的四个代表城市，每个城市三种建筑功能类型共12种不同的负荷环境类型作为负荷样本，根据各气候区不同热工要求下的用户能源使用和计费特点，分别建立了相对经济效益模型，即以相对传统用能方式的费用节省量作为系统经济性的评价指标，通过对模型分析确立了各气候区经济性最优化的系统余热利用原则和辅助模块选用原则。 为获取具有气候差异和建筑功能差异的全年各项逐时负荷值，本文将某建筑体建筑模型按照各气候区的建筑节能设计要求设置了建筑围护结构各项参数，将其置于各代表性城市的典型气象年气象环境中，利用VirtualEnvironment（简称VE）软件进行建筑的空调制冷与采暖负荷模拟。在VE中按照办公、商场、宾馆三种功能建筑的典型人员、设备使用特点以及各气候区各季节的新风开启特点，设置建筑内人员设备等热扰和通风的日、周、年特性曲线，模拟出四个城市三种建筑类型的全年冷热负荷。另参照相关标准规范得出各类型建筑的年逐时电负荷与生活热水负荷。 按照等效价值最优化的余热利用原则和辅助模块选用原则，结合燃机的变工况特性，用matlab软件编制了系统全年等效价值最优化运行计算程序，模拟4个城市3建筑类型系统全年动态运行。将建筑逐时电、冷、采暖、生活热水负荷作为输入条件，求解出各城市各类型建筑逐时逐日的全年最优化相对经济效益值以及各相关参数。 使用程序求解得出4个城市3种类型建筑在5个燃气价格下共60个系统的各相对经济效益值及各相关参数，通过纵横多向对比所求解的数据，分析不同系统的地区、类型、燃气价格设定条件下的系统全年相对经济效益总和的大小及变化规律，分析发现系统全年相对经济效益值随着地区与建筑类型不同而呈现出的变化具有一定的规律性，系统经济效益与动力设备的全年当量满负荷运行小时数以及一次能源综合利用效率之间也有着密切的相关关系，结果可为政府价格控制与楼宇型天然气分布式能源项目的初步评价提供参考。
[Abstract]:Natural gas distributed energy system is an energy production and supply system based on the principle of "temperature matching and cascade utilization", which meets the requirements of users with multiple loads. It has great advantages of energy saving and emission reduction, and has been promoted by many countries. The 12th Five-Year Plan targets and points out that financial support for natural gas distributed energy has been implemented, and Shanghai has implemented a more vigorous subsidy policy for natural gas distributed energy earlier. However, financial subsidy has only a short-term role in promoting the development of the industry, and the development needs to rely on natural gas distributed energy if it is to be widely sustained. There are many factors affecting the economy of natural gas distributed energy, involving a variety of complex energy systems and pricing issues. In this paper, the most simple price relationship in the natural gas distributed energy system for self-use buildings, natural gas distributed energy as the research object, the current universality of the network and access policy. As a policy environment hypothesis, the uncertainties of policy and price factors are weakened. The influence of user's load environment on the economy of natural gas distributed energy system is analyzed.
In this paper, four representative cities in four major climatic zones in China, 12 different load environmental types of three building function types in each city are taken as load samples. According to the characteristics of energy use and consumption under different thermal requirements in different climatic zones, the relative economic benefit models are established respectively, that is, the cost of energy use is comparatively traditional. As the evaluation index of system economy, the principle of waste heat utilization and the principle of auxiliary module selection are established through the model analysis.
In order to obtain the hourly loads with different climatic and architectural functions, this paper sets the parameters of building envelope structure according to the requirements of energy-saving design of buildings in different climatic zones, puts it in the typical meteorological environment of representative cities, and uses the Virtual Environment (VE) software. In VE, three building types in four cities are simulated according to the typical personnel of office, shopping mall and hotel, the characteristics of equipment usage and the characteristics of fresh air opening in different seasons in different climatic zones, and the daily, weekly and annual characteristic curves of heat disturbance and ventilation such as personnel and equipment in buildings. In addition, the annual hourly electricity load and domestic hot water load of various types of buildings are obtained by referring to relevant standards and specifications.
According to the principle of optimal waste heat utilization and auxiliary module selection, combined with the off-design characteristics of the gas turbine, the program of annual equivalent value optimization operation is compiled with MATLAB software to simulate the whole year dynamic operation of three types of building systems in four cities. Under these conditions, the annual optimal relative economic benefits and relevant parameters of various types of buildings in each city are solved hourly and day by day.
The relative economic benefit values and relevant parameters of 60 systems of three types of buildings in four cities under five gas prices are obtained by using the program. Through vertical and horizontal multi-directional comparison, the total annual relative economic benefit of different systems in different areas, types and gas prices are analyzed. It is found that the annual relative economic benefit of the system varies regularly with the area and building type, and there is a close correlation between the economic benefit of the system and the annual equivalent full-load operation hours of power equipment and the comprehensive utilization efficiency of primary energy. The result can be used as the government price. The control provides reference for the preliminary evaluation of building type natural gas distributed energy projects.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU996
本文编号：2186771
[Abstract]:Natural gas distributed energy system is an energy production and supply system based on the principle of "temperature matching and cascade utilization", which meets the requirements of users with multiple loads. It has great advantages of energy saving and emission reduction, and has been promoted by many countries. The 12th Five-Year Plan targets and points out that financial support for natural gas distributed energy has been implemented, and Shanghai has implemented a more vigorous subsidy policy for natural gas distributed energy earlier. However, financial subsidy has only a short-term role in promoting the development of the industry, and the development needs to rely on natural gas distributed energy if it is to be widely sustained. There are many factors affecting the economy of natural gas distributed energy, involving a variety of complex energy systems and pricing issues. In this paper, the most simple price relationship in the natural gas distributed energy system for self-use buildings, natural gas distributed energy as the research object, the current universality of the network and access policy. As a policy environment hypothesis, the uncertainties of policy and price factors are weakened. The influence of user's load environment on the economy of natural gas distributed energy system is analyzed.
In this paper, four representative cities in four major climatic zones in China, 12 different load environmental types of three building function types in each city are taken as load samples. According to the characteristics of energy use and consumption under different thermal requirements in different climatic zones, the relative economic benefit models are established respectively, that is, the cost of energy use is comparatively traditional. As the evaluation index of system economy, the principle of waste heat utilization and the principle of auxiliary module selection are established through the model analysis.
In order to obtain the hourly loads with different climatic and architectural functions, this paper sets the parameters of building envelope structure according to the requirements of energy-saving design of buildings in different climatic zones, puts it in the typical meteorological environment of representative cities, and uses the Virtual Environment (VE) software. In VE, three building types in four cities are simulated according to the typical personnel of office, shopping mall and hotel, the characteristics of equipment usage and the characteristics of fresh air opening in different seasons in different climatic zones, and the daily, weekly and annual characteristic curves of heat disturbance and ventilation such as personnel and equipment in buildings. In addition, the annual hourly electricity load and domestic hot water load of various types of buildings are obtained by referring to relevant standards and specifications.
According to the principle of optimal waste heat utilization and auxiliary module selection, combined with the off-design characteristics of the gas turbine, the program of annual equivalent value optimization operation is compiled with MATLAB software to simulate the whole year dynamic operation of three types of building systems in four cities. Under these conditions, the annual optimal relative economic benefits and relevant parameters of various types of buildings in each city are solved hourly and day by day.
The relative economic benefit values and relevant parameters of 60 systems of three types of buildings in four cities under five gas prices are obtained by using the program. Through vertical and horizontal multi-directional comparison, the total annual relative economic benefit of different systems in different areas, types and gas prices are analyzed. It is found that the annual relative economic benefit of the system varies regularly with the area and building type, and there is a close correlation between the economic benefit of the system and the annual equivalent full-load operation hours of power equipment and the comprehensive utilization efficiency of primary energy. The result can be used as the government price. The control provides reference for the preliminary evaluation of building type natural gas distributed energy projects.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU996
【参考文献】
相关期刊论文 前1条
1 吴大为,王如竹;分布式能源定义及其与冷热电联产关系的探讨[J];制冷与空调;2005年05期
本文编号：2186771
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