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A geospatial analysis approach for the operational assessment of solar ORC systems. Case study: Performance evaluation of a two-stage solar ORC engine in Greece
Renewable Energy ( IF 8.7 ) Pub Date : 2021-09-14 , DOI: 10.1016/j.renene.2021.09.046
Konstantinos X. Soulis 1 , Dimitris Manolakos 1 , Erika Ntavou 1 , George Kosmadakis 2
Affiliation  

Renewable energy potential depends on many variables that vary both in space and time. Therefore, geospatial analysis approaches may effectively support proper planning and technoeconomic analysis. In this study, a simulation model of a two-stage Organic Rankine Cycle (ORC) engine combined with evacuated tube solar collectors was developed and applied throughout Greece. The simulation model uses daily meteorological data for a thirty-four years reference period. These data are downscaled in hourly time step and used to predict the system's performance in spatially distributed form based on experimental data. The obtained results are statistically analysed and a set of ranking maps presenting various aspects of the integrated system performance is created. The results indicate that there is a profound spatial variability. The interannual average power production ranges spatially between 17.4 and 27.7 kWh/d, the total efficiency between 0.022 and 0.028 and the corresponding energy cost between 0.41 and 0.7 €/kWh. Finally, the effect of climate variability on energy production performance and the presence of trends are investigated. The proposed approach was proven to be an effective tool for the assessment of the feasibility and potential of a solar heat-to-power engine for Greece and to be expanded in other regions as well.



中文翻译:

一种用于太阳能 ORC 系统运行评估的地理空间分析方法。案例研究:希腊两级太阳能 ORC 发动机的性能评估

可再生能源潜力取决于许多在空间和时间上都不同的变量。因此,地理空间分析方法可以有效地支持适当的规划和技术经济分析。在这项研究中,开发了一种与真空管太阳能集热器相结合的两级有机朗肯循环 (ORC) 发动机的模拟模型,并在整个希腊应用。模拟模型使用了三十四年参考期的每日气象数据。这些数据以小时为单位进行缩减,并用于根据实验数据以空间分布的形式预测系统的性能。对获得的结果进行统计分析,并创建一组显示集成系统性能各个方面的排名图。结果表明,存在深刻的空间变异性。年际平均发电量在 17.4 到 27.7 kWh/d 之间,总效率在 0.022 到 0.028 之间,相应的能源成本在 0.41 到 0.7 欧元/kWh 之间。最后,调查了气候变化对能源生产性能的影响和趋势的存在。事实证明,所提议的方法是评估太阳能热发电发动机在希腊的可行性和潜力的有效工具,并且还将在其他地区推广。

更新日期:2021-09-20
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