With the increasing global demand for carbon emission reduction, solar energy has received great attention worldwide, with solar dish Stirling system as a representative technology. However, some shortcomings of the conventional design limit its commercial application. In this paper, a novel solar dish Stirling cogeneration system (SDSCS) with adjustable dual receiver is proposed. A control strategy for switching between power generation and heat production modes is established, which is based on direct normal irradiance (DNI). In order to verify the system performance, three regions with significant differences in DNI levels in Tianjin, Yinchuan, and Lhasa were selected for comparison of technical and economic indicators. The results show that, compared with the conventional system that can only generate electricity, the SDSCS can achieve a significantly higher proportion of system running time in three regions at 14.66%, 24.53%, and 34.32%, respectively. The comprehensive energy efficiency shows the same trend at 55.83%, 53.91%, and 41.03%. In addition, the load satisfaction rate calculated by the day of the three regions is 43.05%, 81.46%, and 94.04%, respectively. In terms of levelized energy cost, the value of using SDSCS is 6.77 CNY/(kW·h), 3.37 CNY/(kW·h), and 1.94 CNY/(kW·h), lower than conventional system except for Tianjin.

随着全球对碳减排的需求日益增加，太阳能在世界范围内受到了极大的关注，太阳能碟式斯特林系统就是其中的代表技术。然而，传统设计的一些缺点限制了其商业应用。在本文中，提出了一种具有可调双接收器的新型太阳能碟式斯特林热电联产系统（SDSCS）。建立了一种基于直接法向辐照度（DNI）的发电和产热模式切换控制策略。为验证系统性能，选取天津、银川、拉萨三个DNI水平差异显着的地区进行技术经济指标比较。结果表明，与只能发电的常规系统相比，SDSCS 可以在三个区域中实现显着更高的系统运行时间比例，分别为 14.66%、24.53% 和 34.32%。综合能效为55.83%、53.91%、41.03%，呈现相同趋势。此外，三个区域按天计算的负载满意率分别为43.05%、81.46%和94.04%。在平准化能源成本方面，使用SDSCS的价值为6.77元/（千瓦·小时）、3.37元/（千瓦·小时）和1.94元/（千瓦·小时），低于除天津以外的常规系统。