碟式太阳能热发电系统性能研究
发布时间：2018-07-29 13:24
【摘要】：在环境污染和能源危机日益严峻的背景下,碟式太阳能热发电技术由于光电转换效率高,安装方便等优点,近年来受到了各国政府和研究机构的青睐。我国具有丰富的太阳能资源、广阔的未利用土地,以及较为完善的基础设施等有利条件,适合太阳能电站的发展。本文通过建立碟式太阳能热发电系统模型,模拟分析系统性能,综合分析性能参数特性,为我国典型气象条件下碟式太阳能热发电技术的发展提供依据。首先,分析聚光器系统误差、截获系数、接收器开口直径和吸热器温度等对集热器能量损耗的影响,得出了聚光器最终输出能量函数；分析了接收器工作时的对流热损失、辐射热损失、导热损失和反射损失,得出接收器热损失主要是对流热损失和辐射热损失,最终确定了聚光集热子系统的有效输出能量；介绍了斯特林机的类型,及不同类型的优缺点。针对a型斯特林机循环工作过程进行了分析并确定了斯特林机输出功率的函数。基于聚光器、接收器和斯特林机的能量传递的分析,建立了碟式太阳能热发电系统模型,得到了各模块之间的函数关系,确定了最终系统输出能量的函数。其次,模拟分析了气象条件、运行参数和结构参数对系统性能的影响。分析得出斯特林机压力与太阳辐射强度呈线性增大关系；斯特林机热头温度保持在设定值范围内时,系统输出功率随斯特林机压力的增大而升高；当环境温度降低时,斯特林机效率和系统输出功率均有所升高,但系统输出功率升高幅度不大；当风速增大时,接收器效率及系统输出功率均降低。综合考虑斯特林机输出功率和稳定性,确定了热头温度最佳设定值。分析了接收器孔径对接收器效率和功率的影响,确定了最佳接收器孔径。最后,对系统进行了(?)及(?)经济分析。基于灰箱模型对系统进行了(?)分析,得出系统的(?)效率高达30.9%,超过了槽式太阳能发电的(?)效率。(?)利用效率相对薄弱的环节在动力子系统,其(?)效率为46.8%,(?)损失占总(?)损失的50.8%,占总输入(?)量的35.1%。其次聚光集热子系统的(?)利用效率66.0%,(?)损失占(?)总输入量的34.0%,占总(?)损失的49.2%。提高系统(?)效率的关键在于提高动力转换过程的效率。对系统进行了(?)经济分析,结果表明随着系统使用周期的延长、降低固定资产的初始投资都会降低该系统的产品(?)成本,其次也可以在太阳辐射强度高,日照时间长的地区建立该碟式太阳能热发电系统从而增加系统的年输出(?),因此产品(?)成本也会降低。
[Abstract]:In the background of environmental pollution and energy crisis, dish solar thermal power generation technology has been favored by governments and research institutions in recent years because of its high photoelectric conversion efficiency, easy installation and so on. China has abundant solar energy resources, vast unused land, and relatively perfect infrastructure, which is suitable for the development of solar power plants. In this paper, the model of disc solar thermal power generation system is established, the performance of the system is simulated and analyzed, and the characteristics of performance parameters are synthetically analyzed, which provides the basis for the development of dish solar thermal power generation technology under typical meteorological conditions in China. Firstly, the effects of system error, interception coefficient, receiver opening diameter and temperature of collector on energy loss of collector are analyzed, the final output energy function of concentrator is obtained, and the convection heat loss of receiver is analyzed. The heat loss of the receiver is mainly convection heat loss and radiation heat loss. Finally, the effective output energy of the condensing heat collection subsystem is determined, and the type of Stirling machine is introduced. And the advantages and disadvantages of different types. The function of output power of Stirling machine is determined by analyzing the cycle working process of type a Stirling machine. Based on the analysis of energy transfer between concentrator, receiver and Stirling machine, the model of disc solar thermal power generation system is established, and the functional relationship among the modules is obtained, and the output energy function of the final system is determined. Secondly, the effects of meteorological conditions, operation parameters and structure parameters on the system performance are simulated and analyzed. The results show that the pressure of Stirling machine increases linearly with the intensity of solar radiation, the output power of Stirling machine increases with the increase of the pressure of Stirling machine, and when the temperature of Stirling engine hot head is kept in the range of fixed value, the output power of the system increases with the increase of the pressure of Stirling machine. The efficiency of Stirling machine and the output power of the system are increased, but the output power of the system is not much increased, while the efficiency of the receiver and the output power of the system decrease with the increase of the wind speed. Considering the output power and stability of Stirling machine, the optimum setting value of hot head temperature is determined. The influence of receiver aperture on receiver efficiency and power is analyzed, and the optimum receiver aperture is determined. Finally, the system is carried out (?) And (?) Economic analysis Based on the grey box model, the system is analyzed. Analyze and get the systematic (?) The efficiency is as high as 30.9, more than the trough solar power generation (?) Efficiency. Utilization efficiency is relatively weak in the power subsystem, its (?) Efficiency is 46.8%, (?) Losses account for the total (?) The loss of 50.8% of the total input (?) The value of 35. 1. Secondly, the (?) Utilization efficiency 66.0, (?) Loss share (?) 34.0% of the total input, accounting for the total (?) The loss of 49.2%. Improve the system (?) The key of efficiency is to improve the efficiency of power conversion process. The system was carried out (?) Economic analysis, the results show that with the extension of the system life cycle, reducing the initial investment in fixed assets will reduce the system products (?) The cost, secondly, can also be established in areas with high solar radiation intensity and long sunshine time, thereby increasing the annual output of the system, so that the product (?) Costs will also be reduced.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM615
本文编号：2152813
[Abstract]:In the background of environmental pollution and energy crisis, dish solar thermal power generation technology has been favored by governments and research institutions in recent years because of its high photoelectric conversion efficiency, easy installation and so on. China has abundant solar energy resources, vast unused land, and relatively perfect infrastructure, which is suitable for the development of solar power plants. In this paper, the model of disc solar thermal power generation system is established, the performance of the system is simulated and analyzed, and the characteristics of performance parameters are synthetically analyzed, which provides the basis for the development of dish solar thermal power generation technology under typical meteorological conditions in China. Firstly, the effects of system error, interception coefficient, receiver opening diameter and temperature of collector on energy loss of collector are analyzed, the final output energy function of concentrator is obtained, and the convection heat loss of receiver is analyzed. The heat loss of the receiver is mainly convection heat loss and radiation heat loss. Finally, the effective output energy of the condensing heat collection subsystem is determined, and the type of Stirling machine is introduced. And the advantages and disadvantages of different types. The function of output power of Stirling machine is determined by analyzing the cycle working process of type a Stirling machine. Based on the analysis of energy transfer between concentrator, receiver and Stirling machine, the model of disc solar thermal power generation system is established, and the functional relationship among the modules is obtained, and the output energy function of the final system is determined. Secondly, the effects of meteorological conditions, operation parameters and structure parameters on the system performance are simulated and analyzed. The results show that the pressure of Stirling machine increases linearly with the intensity of solar radiation, the output power of Stirling machine increases with the increase of the pressure of Stirling machine, and when the temperature of Stirling engine hot head is kept in the range of fixed value, the output power of the system increases with the increase of the pressure of Stirling machine. The efficiency of Stirling machine and the output power of the system are increased, but the output power of the system is not much increased, while the efficiency of the receiver and the output power of the system decrease with the increase of the wind speed. Considering the output power and stability of Stirling machine, the optimum setting value of hot head temperature is determined. The influence of receiver aperture on receiver efficiency and power is analyzed, and the optimum receiver aperture is determined. Finally, the system is carried out (?) And (?) Economic analysis Based on the grey box model, the system is analyzed. Analyze and get the systematic (?) The efficiency is as high as 30.9, more than the trough solar power generation (?) Efficiency. Utilization efficiency is relatively weak in the power subsystem, its (?) Efficiency is 46.8%, (?) Losses account for the total (?) The loss of 50.8% of the total input (?) The value of 35. 1. Secondly, the (?) Utilization efficiency 66.0, (?) Loss share (?) 34.0% of the total input, accounting for the total (?) The loss of 49.2%. Improve the system (?) The key of efficiency is to improve the efficiency of power conversion process. The system was carried out (?) Economic analysis, the results show that with the extension of the system life cycle, reducing the initial investment in fixed assets will reduce the system products (?) The cost, secondly, can also be established in areas with high solar radiation intensity and long sunshine time, thereby increasing the annual output of the system, so that the product (?) Costs will also be reduced.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM615
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相关期刊论文 前1条
1 钱伯章;;BP世界能源统计2014年评论[J];电力与能源;2014年05期
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