天津中新生态城动漫园三联供能源系统优化分析

发布时间：2018-04-30 00:27

本文选题：建筑能耗 + 冷热电三联供　；参考：《天津大学》2012年硕士论文

【摘要】：绿色建筑是在全寿命周期中实现高效率地利用资源的建筑物。发展绿色建筑,节约能源资源、保护环境,是中国建筑的发展方向和必然要求。建筑能耗模拟是建筑节能设计的首要任务和重要技术手段。随着天然气的广泛应用和环保要求的不断提高,冷热电三联产已经成为我国城市不可或缺的能源供应模式之一,其具有能源利用合理、综合效率高、经济性较好、环保性优良、冷热电负荷分配灵活等优势。燃气冷热电联产(CCHP)是一种建立在能量梯级利用概念基础上,以天然气为一次能源,同时产生电能和可用热/冷能的能源系统,目的在于提高系统能源利用效率,减少CO_2、SO_2等有害气体的排放。本文通过介绍建筑能耗计算方法并比较分析各种能耗模拟软件,总结能耗模拟国内外现状,提出基于EnergyPlus的新一代建筑能耗模拟软件用户界面DesignBuilder,并简述其性能特点及应用。利用EnergyPlus结合DesignBuilder软件对生态城动漫园环内区域进行能耗模拟,获取较准确的基于实际运行时间的冷热电动态负荷及能耗。冷、热、电三联供系统只有在合理的配置与运行方式下才能充分发挥其节能、环保、综合效率高的优点。本文在目前存在的单纯以电定热和以热定电配置方式的基础上提出新的思路,即综合考虑系统容量配置和运行策略进行经济性评价。本文以全寿命周期年费用(LCC)最小为主要目标函数建立优化评价模型,并综合考虑净现值最大和(火用)经济系数最小及投资回收期合理等对能源系统配置和运行优化评价,确定最佳系统方案。结果表明:不管实际条件按照传统工程经验的一味“以热定电”及“以冷定电”都是不可取的,应根据项目的负荷情况、当地能源价格、市政条件等来确定经济性最优的三联供方案;天然气价格对三联供系统容量配置有很大影响,天然气价格越高,其经济性和适用性越低;在实际天然气价格2.4元/Nm3时,动漫园最优三联供系统方案是全年运行时以冷定电原则下的的40%;一次能源消耗最小的配置为以电定冷/热配置原则下的30%。本文提出三种常规分供方案,与最优三联供方案进行比较,结果表明根据优化模型确定的动漫园能源系统方案具有更好的节能性、环保性和经济性。本工作为生态城园区整体能源系统方案选择和优化提供了相关数据及理论基础。
[Abstract]:Green building is a building that uses resources efficiently in the whole life cycle. Developing green buildings, saving energy resources and protecting environment is the development direction and inevitable requirement of Chinese architecture. Building energy consumption simulation is the most important task and important technical means of building energy saving design. With the wide application of natural gas and the continuous improvement of environmental protection requirements, the cogeneration of cold, heat and electricity has become one of the indispensable energy supply modes in Chinese cities. It has the advantages of reasonable energy utilization, high comprehensive efficiency, good economy and good environmental protection. The advantages of cooling and heating load distribution are flexible. CCHP is an energy system based on the concept of energy cascade utilization, which takes natural gas as primary energy and generates electric energy and available heat / cold energy at the same time. The purpose of CCHP is to improve the energy efficiency of the system. Reduce the emission of harmful gases such as CO2SO2. This paper introduces the calculation methods of building energy consumption and compares and analyzes all kinds of energy consumption simulation software, summarizes the present situation of energy consumption simulation at home and abroad, puts forward a new generation building energy consumption simulation software user interface based on EnergyPlus, and briefly describes its performance characteristics and application. Using EnergyPlus and DesignBuilder software to simulate the energy consumption in the area of the ecological city animation park to obtain the accurate dynamic load and energy consumption of the cold heat and electricity based on the actual running time. The advantages of energy saving, environmental protection and comprehensive efficiency can only be brought into full play in the system of cold, heat and electricity supply under reasonable configuration and operation mode. In this paper, a new idea is put forward based on the existing methods of simply using electric heating and thermoelectric configuration, that is, considering the configuration of system capacity and operation strategy for economic evaluation. In this paper, the optimization evaluation model is established with the minimum annual cost of the whole life cycle (LCC) as the main objective function, and the optimal evaluation of energy system configuration and operation is considered synthetically, such as the maximum net present value, the minimum exergy economic coefficient and the reasonable investment recovery period, etc. Determine the best system scheme. The results show that the local energy price should be based on the load of the project, regardless of whether the actual conditions are based on the traditional engineering experience of "heating the electricity" or "using the cold to fix the electricity". Municipal conditions are used to determine the optimal triple supply scheme for economy; the price of natural gas has a great impact on the capacity allocation of the triple supply system. The higher the natural gas price, the lower its economy and applicability; when the actual natural gas price is 2.4 yuan / Nm3, The optimal triple power supply system scheme of animation park is 40% under the principle of cooling electricity while running throughout the year, and the lowest primary energy consumption is 30% under the principle of electric cooling / heat allocation. In this paper, three conventional schemes are proposed, which are compared with the optimal triple scheme. The results show that the energy system scheme of animation park determined by the optimization model has better energy saving, environmental protection and economy. This work provides the relevant data and theoretical basis for the selection and optimization of the overall energy system of the Eco-city Park.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TU83

【引证文献】