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Exploring dynamic operation of a solar dish-stirling engine: Validation and implementation of a novel TRNSYS type
Sustainable Energy Technologies and Assessments ( IF 8 ) Pub Date : 2020-06-11 , DOI: 10.1016/j.seta.2020.100765
Mohammad Vahidi Bidhendi , Yasser Abbassi

The combination of solar dishes and Stirling engines is a promising and reliable technology to convert solar radiation into power which can minimize fossil fuel consumption for electricity generation. The current research intends to explore solar dish/Stirling engine system functionality under different operating conditions and climates. A numerical routine has been developed and adopted to TRNSYS© to estimate the impact of dynamic parameters, including irradiation flux and ambient temperature on the daily, monthly, or seasonal performance and efficiency of the solar dish-Stirling engine system. The routine is based on Schmidt’s theory in association with a heat transfer model for the receiver of the dish. First, the routine has been validated against experimental measurements with an error below 15%. Then, the effect of the dish’s angle and cold sink temperature on system efficiency have been investigated. It is found that an approximately 5% increase in power will be realistic if the cold sink temperature fell by 30 degrees. Eventually, the annual performance of the system in different climates has been examined. It can be concluded that the best output of the system will occur in desert climates with over 20 GJ of electrical energy per year (24% efficiency). In contrast, in a continental humid climate, the rate of power generation is 50% lower (15% efficiency).



中文翻译:

探索太阳能碟式斯特林发动机的动态运行:新型TRNSYS类型的验证和实现

太阳能碟和斯特林发动机的组合是一种有前途且可靠的技术,可以将太阳辐射转化为电能,从而可以最大程度地减少化石燃料的发电消耗。当前的研究旨在探索在不同运行条件和气候下的太阳能碟/斯特林发动机系统的功能。已经开发了一种数值程序并将其应用于TRNSYS©,以估算动态参数(包括辐照通量和环境温度)对太阳能碟式斯特林发动机系统的日,月或季节性能和效率的影响。该程序基于Schmidt的理论,并结合了盘子接收器的传热模型。首先,该例程已针对实验测量值进行了验证,误差低于15%。然后,研究了碟形角度和冷沉温度对系统效率的影响。已经发现,如果冷沉温度下降30度,则功率增加大约5%是现实的。最终,研究了该系统在不同气候下的年度性能。可以得出结论,该系统的最佳输出将发生在沙漠气候中,每年的电能超过20 GJ(效率为24%)。相反,在大陆潮湿的气候中,发电率降低了50%(效率为15%)。可以得出结论,系统的最佳输出将发生在沙漠气候中,每年的电能超过20 GJ(效率为24%)。相反,在大陆潮湿的气候中,发电率降低了50%(效率为15%)。可以得出结论,该系统的最佳输出将发生在沙漠气候中,每年的电能超过20 GJ(效率为24%)。相反,在大陆潮湿的气候中,发电率降低了50%(效率为15%)。

更新日期:2020-06-11
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