太阳能辅助抽水蓄能发电技术的研究

发布时间：2018-09-16 19:05

【摘要】：能源和淡水资源是人类社会生存和发展的物质基础,当前,世界各国普遍以煤炭、石油、天然气为传统能源。随着传统能源的短缺、淡水资源缺乏和传统能源造成的环境污染日益严重,世界各国把发展重心转向可再生能源的开发和利用。综合考虑太阳能的优点和抽水蓄能电站的特点提出一种新的技术：太阳能辅助抽水蓄能发电技术。首先,对提出太阳能辅助抽水蓄能发电技术的原因和必要性进行了分析,并对太阳能辅助抽水蓄能发电技术的原理和各种技术的支持进行了系统的分析与研究,对此技术中的太阳能集热器、蒸汽上升系统、换热系统和冷凝系统进行了简单的设计与计算分析。然后,采用FLUENT软件对太阳能辅助抽水发电技术中的关键子系统蒸汽上升管系统进行数值模拟,得到了蒸汽上升管内部温度场、压力场和速度场。研究了蒸汽上升管不同的结构参数对管内蒸汽流速和管内抽力的影响,从模拟结果中得出结论：上升管高度越高,管内的抽力越大,流速越快。高度一定时,半径越大,管内的抽力越小,流速越小。最后,研究了太阳能辅助抽水蓄能发电技术应用于海水淡化和水电联产的运行方式。从经济上分析太阳能辅助抽水蓄能发电技术的可行性,采取投资回收年限对此技术进行研究。太阳能辅助抽水蓄能发电技术只考虑发电价值和投资的情况下,其投资回报年限为20年,考虑海水淡化和环境的价值后,此技术的投资回收年限为8.2年。对此技术的回收年限和能源平均成本影响最大的因素太阳能集热价格进行了研究分析。再综合考虑系统的社会价值和电网价值,从而证明此技术是可行的,具有一定的研究价值和推广价值。
[Abstract]:Energy and fresh water resources are the material basis for the survival and development of human society. At present, coal, oil and natural gas are widely used as traditional energy in the world. With the shortage of traditional energy, the shortage of fresh water resources and the increasingly serious environmental pollution caused by traditional energy, countries all over the world turn to the development and utilization of renewable energy. Considering the advantages of solar energy and the characteristics of pumped storage power station, a new technology, solar assisted pumped storage power generation technology, is proposed. Firstly, the reasons and necessity of solar assisted pumped storage power generation technology are analyzed, and the principle of solar assisted pumped storage power generation technology and the support of various technologies are systematically analyzed and studied. The solar collector, steam rising system, heat transfer system and condensing system are simply designed and calculated. Then, FLUENT software is used to simulate the steam riser system, which is a key subsystem in the solar assisted pumping technology. The temperature field, pressure field and velocity field in the steam riser are obtained. The influence of different structural parameters of steam riser on the steam velocity and pumping force in the pipe is studied. It is concluded from the simulation results that the higher the height of the riser tube, the greater the suction force in the pipe and the faster the velocity of flow. When the height is constant, the larger the radius, the smaller the pumping force and velocity. Finally, the application of solar-assisted pumped storage power generation technology to seawater desalination and hydropower co-generation is studied. The feasibility of solar assisted pumped storage power generation technology is analyzed economically, and the investment recovery years are adopted to study the technology. The investment return life of solar assisted pumped storage power generation technology is 20 years when the value and investment of power generation are only considered. After considering the value of seawater desalination and environmental value, the investment recovery life of this technology is 8.2 years. The factors that have the greatest influence on the recovery life and average energy cost of this technology are studied and analyzed in this paper. Considering the social value of the system and the value of the power grid, it is proved that the technology is feasible and has certain research value and popularization value.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV743;TK519
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本文编号：2244490