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Modélisation et caractérisation expérimentale d’une boucle solaire cylindro-parabolique intégrant un stockage de type thermocline

Abstract : Like other renewable energy technologies, concentrated solar power (CSP) suffers from resource intermittence. Thermocline technology is a promising solution to decrease cost of thermal energy storage in CSP plants. Thermocline behavior has thoroughly been studied in the past years and its behavior is considered well known. However no study treated of thermocline tanks integrated in CSP plants. Thus, the impact of the varying outlet temperature of the thermocline storage has not been assessed yet. This work aims to fill this lack of knowledge by studying a mini parabolic trough power plant integrating a thermocline tank as storage.First, the compatibility between the heat transfer fluid of the plant (synthetic oil) and various potential filler materials (Cofalit, coal fly ash bricks, alumina) of the storage tank is verified. Then, some performance studies are performed on the three main components of the power plant (energy storage tank, solar collectors, steam generator). Finally, the behavior of the whole system is assessed, with a focus on the impact of the varying fluid temperature at the outlet of the thermocline tank on the other components.It has been shown that, with a proper sizing and an appropriate control strategy, thermocline technology induces very low decrease of the solar power plant performance in comparison to the conventional two tank technology (maximum 3-4% of electrical power production difference).
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Submitted on : Wednesday, January 31, 2018 - 4:25:06 PM
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Thomas Fasquelle. Modélisation et caractérisation expérimentale d’une boucle solaire cylindro-parabolique intégrant un stockage de type thermocline. Autre. Université de Perpignan, 2017. Français. ⟨NNT : 2017PERP0040⟩. ⟨tel-01697915⟩

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