结合火电厂耦合新能源的需要,为有效利用火电厂煤场等墙体的垂直空间,将槽式太阳能集热器垂直布置与煤场挡风墙和围墙相结合,在大幅减少占地面积的同时,提高火电厂可再生能源利用率。首先对垂直布置层数和间距进行优化,确定最优垂直布置方法;因集热器垂直布置时太阳能输入工况特殊,对比125、350、600 MW 3种容量机组在不同集热面积下太阳能辅助发电方案的效益。利用Ebsilon软件对各方案的发电量进行仿真对比,并进行经济性分析。结果表明,垂直布置采用4层、纵向间距选取3.25 m为最优布置方法;此时,集热器垂直布置与传统布置的最优经济效益基本相当,垂直布置节省的占地成本足以弥补遮挡带来的发电量损失,太阳能辅助燃煤发电厂全年可再生能源发电占比最大可达4%。
Abstract
To meet the needs of integrating renewable energy into coal-fired power plants, this study proposes a vertical arrangement of parabolic trough solar collectors by utilizing the vertical space of structures such as coal yard windbreak walls and perimeter walls. This approach significantly reduces land occupation while enhancing the utilization of renewable energy in coal-fired power plants. First, an optimization of the vertical arrangement, including the number of layers and spacing, was conducted to determine the optimal configuration. Given the unique solar input conditions associated with vertical PTSC placement, the performance of solar-aided power generation （SAPG） schemes was evaluated for 125 MW, 350 MW, and 600 MW units under different collector areas. The power generation performance of each scheme was simulated and compared using Ebsilon software, followed by an economic analysis. The results indicate that the optimal configuration consists of four vertical layers with a longitudinal spacing of 3.25 m. Under these conditions, the economic benefits of the vertical arrangement are comparable to those of the conventional horizontal layout, while the land cost savings compensate for the power loss caused by shading. The annual renewable energy contribution of the SAPG system in coal-fired power plants can reach up to 4%.
关键词
太阳发电 /
燃煤电厂 /
太阳能集热器 /
太阳能辅助发电 /
节省煤耗 /
电站系统经济性分析
Key words
solar power generation /
coal fired power plant /
solar collectors /
solar auxiliary power generation /
coal consumption saving /
economic analysis of power plant systems
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