Publication: Análisis transitorio de un sistema de almacenamiento térmico de alta temperatura
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2020-02-18
Defense date
2020-03-03
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Abstract
El almacenamiento térmico tiene unas
posibilidades prometedoras en el desarrollo
de medidas de flexibilización de la demanda
energética. Los ciclos del sol difieren de los
ciclos de consumo, por lo que, en lo relativo
a las tecnologías de generación solar, es
preciso el empleo de elementos de
almacenamiento. Con ese fin, en el trabajo
se obtiene un programa en
Matlab, realizado en base a un modelo
matemático, con el que se comprueba la
relación entre las variables geométricas y de
contorno con el resultado del sistema.
Gracias a ello, en este trabajo se desarrolla
un diseño óptimo en términos temporales y
espaciales, que permite aportar mayor
información acerca de los procesos de carga
y descarga de los TES.
El diseño óptimo se ha obtenido con unos
valores de 19.49 mm de espesor, 1400 mm
de altura y un factor de proporción canal-
espesor de 0.309. Con estos valores, el
tiempo de carga resultante ha sido de
prácticamente 40 minutos.
Thermal storage has some promising possibilities in terms of the development of efficient solutions to the energetical demand flexibilization issue. The cycles of solar radiation differ from the ones of energy consumption, which is the reason why, in relation to solar generation technologies, it is mandatory to employ storage elements. Therefore, in this thesis, a Matlab program based on a mathematical model is obtained, with which it is tested how related are both geometrical and boundary conditions with the charge and discharge results. Due to this, in the project, an optimal design is developed, which provides information about the processes of charge and discharge of a TES. The optimal design was shown to be obtained with values of 19.49 mm of width, 1400 mm of height, and a channel-width factor of 0.309. With these values, the time taken to charge the thermal storage system was of almost 40 minutes.
Thermal storage has some promising possibilities in terms of the development of efficient solutions to the energetical demand flexibilization issue. The cycles of solar radiation differ from the ones of energy consumption, which is the reason why, in relation to solar generation technologies, it is mandatory to employ storage elements. Therefore, in this thesis, a Matlab program based on a mathematical model is obtained, with which it is tested how related are both geometrical and boundary conditions with the charge and discharge results. Due to this, in the project, an optimal design is developed, which provides information about the processes of charge and discharge of a TES. The optimal design was shown to be obtained with values of 19.49 mm of width, 1400 mm of height, and a channel-width factor of 0.309. With these values, the time taken to charge the thermal storage system was of almost 40 minutes.
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Keywords
Energías renovables, Energía solar, Almacenamiento térmico de energía, Simulación, Baterías, Optimización, Modelado