槽式太阳能辅助燃煤发电系统集热场动态仿真研究

发布时间：2018-05-08 07:26

本文选题：槽式集热系统 + 动态仿真　；参考：《华北电力大学》2015年硕士论文

【摘要】：太阳能辅助燃煤发电系统将清洁的太阳能与传统燃煤火力发电机组进行互补,用太阳辐照热量替代部分化石燃料,可有效利用可再生能源,降低太阳能热发电成本,同时减少常规火力发电过程的燃煤消耗,符合全球化节能减排大趋势的发展要求。本文主要对抛物槽式太阳能真空管集热器及槽式太阳能集热系统辅助燃煤发电系统进行了相关仿真研究,主要成果与创新点概述如下：(1)基于槽式太阳能集热器的基本结构及其聚光集热特点,对槽式集热器的光热转换和能量传递过程展开研究,充分考虑工作流体物性变化对其传热流动性能的影响,建立起多热容变物性的集热器动态数学模型并进行了验证。(2)将验证后的模型用于仿真模拟,系统分析了槽式太阳能集热器在太阳辐照、导热油参数,风速及环境温度等条件变化下不同运行工况时的静态和动态运行性能。(3)在STAR-90仿真支撑平台上搭建起槽式太阳能集热系统,对不同太阳辐照及流速下集热场的布置方式进行仿真模拟,得到不同工况条件下集热系统所耗泵功和集热效率,进而得到使得折合效率最高的最优支路布置和流速设计。(4)选取某一特定最优工况下槽式太阳能集热系统与仿真平台上330MW燃煤机组通过油水换热器进行耦合,得出槽式集热系统中油水换热器中给水量变化时,互补发电系统各项运行参数的变化趋势,最后对集热系统内导热油流量和太阳辐照量的改变对整个互补系统运行情况的影响进行了灵敏度分析。
[Abstract]:Solar assisted coal-fired power generation system can effectively utilize renewable energy and reduce the cost of solar thermal power generation by complementing clean solar energy with traditional coal-fired thermal generating units and replacing some fossil fuels with solar radiation heat. At the same time, reducing coal consumption in conventional thermal power generation process is in line with the development of global trend of energy saving and emission reduction. In this paper, the related simulation research on parabolic trough solar vacuum tube collector and trough solar energy collector auxiliary coal-fired power generation system is carried out. The main achievements and innovations are summarized as follows: (1) based on the basic structure of the trough solar collector and the characteristics of the condensing solar collector, the photothermal conversion and energy transfer process of the trough solar collector are studied. Considering the influence of working fluid physical properties on its heat transfer and flow performance, the dynamic mathematical model of multi-heat capacity and physical properties of collector is established and verified. (2) the verified model is used for simulation and simulation. The parameters of heat conduction oil and solar radiation of trough solar collector are systematically analyzed. Static and dynamic operating performance of different operating conditions under different operating conditions, such as wind speed and ambient temperature, etc.) the trough solar energy collector system is built on the STAR-90 simulation support platform. The distribution of collecting heat field under different solar irradiation and velocity is simulated, and the pump power and heat collection efficiency are obtained under different working conditions. Finally, the optimal branch layout and velocity design with the highest conversion efficiency are obtained.) the trough solar energy collector system is selected to be coupled with the 330MW coal-fired units on the simulation platform through oil-water heat exchangers under a specific optimal working condition. The variation trend of the operation parameters of complementary power generation system is obtained when the water supply in the oil-water heat exchanger changes in the tank type heat collector system. Finally, the sensitivity analysis of the effect of heat transfer oil flow and solar radiation on the operation of the whole complementary system is carried out.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM61

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