首页 > 资料专栏 > 地区 > 中南地区 > 河南 > 吸收式热泵用于郑州某热电厂的可行性研究报告DOC

吸收式热泵用于郑州某热电厂的可行性研究报告DOC

资料大小:1876KB(压缩后)
文档格式:DOC
资料语言:中文版/英文版/日文版
解压密码:m448
更新时间:2021/4/19(发布于广东)

类型:金牌资料
积分:--
推荐:升级会员

   点此下载 ==>> 点击下载文档


文本描述
吸收式热泵用于郑州某热电厂的可行性研究 专 业,建筑与土木工程 硕 士 生,田立先 指导教师,于海龙 教授 董向元 副教授 摘要 随着现代科学技术的发展,节约能源和实现能源的回收再利用显得非常重要。 火电厂正常运行中,有超过 50%的热量没有被有效利用,其中大部分被循环水带走, 然后排入大气。然而,吸收式热泵是一种可以回收利用这部分热量的技术。利用这 种技术对电厂改造,可以获取被循环水带走的这些低温热量,提高能源效率,实现 经济效益和环境效益的双赢。 本报告以郑州市东区某热电厂热电联产机组为研究对象,在分析吸收式热泵原 理的基础上,对该电厂原供暖系统进性设计改造。在原供暖系统的基础上,增加吸 收式热泵项目,对城市热网回水进行一次加热,热泵机组出水再进入原热网加热器 进行二次加热,最后实现城市热网供水的参数标准。 首先,建立用吸收式热泵技术对原供暖系统改造的物理模型。在了解该项目工 程概况情况下,分别从现实条件,自然条件,热经济性及技术安全性分析吸收热泵 改造的可行性,从而建立改造后的供暖系统流程图,建立物理模型,并说明各个季 节的运行模式。 其次,分别对改造前后的供暖系统进行热力计算。对改造后的供暖系统模型, 设计热力系统图。假设运行参数,通过进行热力计算,得出改造后所耗费的供暖蒸 汽量。然后与改造前所计算的供暖抽汽量对比,得出吸收式热泵机组供暖改造节约 蒸汽量的结论。而这些蒸汽量可换算出节约的燃煤,或者增加的发电量,也就是创 造的经济效益和环境效益。 再次,对改造后的数据进行优化分析。一方面,分析驱动蒸汽压力,循环水温 度和进出热泵机组的热网水温度等因素的变化对热泵性能指标COP 的影响。另一方 面,在假设供暖负荷和部分供暖参数不变情况下,随机抽取热泵机组运行参数和不 同的COP ,通过试算法,分别计算出供暖抽汽量。将这些数据进行对比,得出相对 接近最优的热泵机组运行参数。中原工学院硕士学位报告 摘要 课题来源,河南省高等学校重点科研项目计划 项目编号,15A480011 关 键 词,吸收式热泵;循环水余热利用;供暖改造;优化分析中原工学院硕士学位报告 ABSTRACT ABSORPTION HEAT PUMP APPLICATION IN THE FEASIBILITY STUDY OF ATHERMAL POWER PLANT OF ZHENGZHOU Speciality: Architecture and civil engineering M.E. Candidate: Tian Lixian Supervisor: Professor Yu Hailong Associate Professor Dong Xiangyuan Abstract With the development of modern science and technology, energy conservation and recycling are of great importance. Over 50% of heat is not used effectively during the normal operation of the thermal power plant, most of which is taken away by the circulating water and released into the atmosphere. However, the absorption heat pump is a kind of technology which can recycle the heat. Using this technology to renovate power plant ,which can allow the low-temperature heat to be recycled in the circulating water, thus improving energy efficiency and obtaining both economic and environmental benefit. With cogeneration units in a thermal power plant in the Eastern District of Zhengzhou City as the object of study, the original heating system in the power plant is designed and modified in this paper by analyzing the principle of the absorption heat pump. On the basis of the original heating system, the absorption heat pump is added to directly heat the backwater in the municipal heating system, and the water is discharged from the heat pump unit and entered into the heater of the original heating system for reheating so that the parameter requirements for water supply of the municipal heating system can be met. Firstly, the physical model for modifying the original heating system with the absorption heat pump technology is established. By knowing the general background information about the project, the feasibility of modifying the absorption heat pump is analyzed from realistic conditions, natural conditions, heat economy and technology中原工学院硕士学位报告 ABSTRACT security to build the flow chart of the modified heating system, establish the physical model and describe the operating mode for each season. Secondly, the heat calculation is conducted on the heating system before and after the modification respectively. The heat flow diagram is designed for the model of the modified heating system. The steam consumption for heating after the modification is obtained through the heat calculation by assuming operating parameters. Then, the conclusion on the steam saved due to the modification of the heating system in the absorption heat pump unit is drawn by comparing it with the steam extraction capacity for heating calculated before the modification. The steam can be converted to the coal saved or power generation increased, i.e. the economic and environmental benefit created. Finally, optimization analysis is made to the data after the modification. On one hand, the effect of changes in the driving steam pressure, circulating water temperature and temperature of heating system water flowing in and out of the heat pump unit on the performance index of the heat pump is analyzed. On the other hand, on the supposition that the heating load and partial heating parameters remain unchanged, operating parameters of the heat pump unit and different COP are selected randomly to calculate the heating steam with the trial method. Near-optimal operating parameters of the heat pump unit are obtained by comparing these data. Keywords: absorption heat pump;circulating water waste heat;heating reform; optimization analysis Project Source,key scientific research project plan of Colleges and universities in henan province Project Number,15A480011中原工学院硕士学位报告 目录 目 录 1. 绪论................................................................................................................................1 1.1 课题的背景和意义.................................................................................................. 1 1.1.1 背景....................................................................................................................1 1.1.2 意义....................................................................................................................1 1.2 吸收式热泵研究现状.............................................................................................. 3 1.2.1 国内现状............................................................................................................3 1.2.2 国外现状............................................................................................................4 1.3 课题研究的主要内容.............................................................................................. 5 2. 热泵................................................................................................................................6 2.1 引言.......................................................................................................................... 6 2.2 热泵概述.................................................................................................................. 6 2.2.1 热泵定义............................................................................................................6 2.2.2 热泵分类............................................................................................................6 2.3 吸收式热泵.............................................................................................................. 8 2.3.1 第一类溴化锂吸收式热泵............................................................................8 2.3.2 第二类溴化锂吸收式热泵................................................................................9 3. 吸收式热泵供暖改造的分析与建模..........................................................................11 3.1 引言........................................................................................................................ 11 3.2 郑州市某热电厂工程概况与供暖现状................................................................ 11 3.2.1 工程概况..........................................................................................................11 3.2.2 供暖现状..........................................................................................................12 3.2.3 供暖前景..........................................................................................................13 3.3 吸收式热泵在该热电厂供暖改造分析................................................................ 13 3.3.1 自然条件与基建条件分析..............................................................................13 3.3.2 热经济性分析..................................................................................................13 3.3.3 安全性分析......................................................................................................15 3.4 吸收式热泵在该热电厂供暖改造物理模型........................................................ 15 3.4.1 原供暖系统模型..............................................................................................15 3.4.2 供暖系统改造后的物理模型..........................................................................17中原工学院硕士学位报告 目录 3.4.3 冬季运行模式..................................................................................................18 3.4.4 其他季节运行模式..........................................................................................18 4. 吸收式热泵供暖改造后的热力计算..........................................................................20 4.1 引言......................................................................................................................... 20 4.2 原供暖系统热力计算............................................................................................. 20 4.2.1 原供暖系统热力系统图...................................................................................20 4.2.2 原供暖系统参数假设.......................................................................................20 4.2.3 原供暖系统热力计算.......................................................................................21 4.3 供暖系统改造后热力计算..................................................................................... 22 4.3.1 改造后供暖系统热力系统图...........................................................................22 4.3.2 改造后的供暖系统流程详述...........................................................................22 4.3.3 改造后的供暖系统参数假设...........................................................................23 4.3.4 热网首站的热网一次水和循环水参数计算...................................................24 4.3.5 改造后的供暖系统蒸汽量计算.......................................................................25 4.4 改造前后蒸汽量发电量计算................................................................................. 26 5. 吸收式热泵供暖改造优化分析..................................................................................27 5.1 吸收式热泵供暖改造优化分析的内容................................................................ 27 5.2 影响吸收式热泵COP 的因素分析.......................................................................27 5 .2.1 吸收式热泵循环COP .....................................................................................27 5.2.2 不同因素对吸收式热泵COP 的影响.............................................................30 5.3 吸收式热泵供暖改造参数优化分析.................................................................... 33 5.3.1 选择因素..........................................................................................................33 5.3.2 热泵首站机组和流程......................................................................................34 5.3.3 运行参数的优化..............................................................................................34 5.4 本章小结................................................................................................................ 38 6. 结论与展望..................................................................................................................39 6.1 结论......................................................................................................................... 39 6.2 展望......................................................................................................................... 40