Publication: Optimización del múltiplo solar para centrales eléctricas termosolares con colectores cilindro-parabólicos
Loading...
Identifiers
Publication date
2017-10-09
Defense date
2017-10-09
Authors
Advisors
Tutors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
El estudio que hemos realizado en este trabajo de fin de grado se centra en la
optimización del múltiplo solar en centrales solares termoeléctricas con colectores
cilindro-parabólicos. Para este estudio como veremos más adelante hemos tenido en
cuenta una serie de suposiciones o hipótesis a partir de las cuáles desarrollar la
investigación. Como por ejemplo la utilización de aceite como fluido de transferencia de
calor o no tener en cuenta ningún combustible fósil, es decir no habrá hibridación, como
apoyo durante los periodos de no irradiación. Aunque normalmente este tipo de
centrales posean un sistema de almacenamiento para poder mantener así el
rendimiento del bloque de potencia durante periodos de no insolación nuestro estudio
se enfocará a una planta que no disponga de tales sistemas de almacenamiento para
lo cual determinar un tamaño de campo solar adecuado con respecto a la potencia
nominal eléctrica es esencial.
En primer lugar hemos analizado a nivel global y teórico la situación de las energías
renovables y el mercado energético en el mundo y concretamente en España. Por otro
lado se ha descrito de manera concisa en qué consisten las centrales termosolares CCP
(colectores cilindro-parabólicos).
El estudio se ha llevado a cabo con el Software SAM (System Advisor Model), creado
por National Renewable Energy Laboratory. Se ha descrito de manera minuciosa los
pasos seguidos con este programa, los parámetros establecidos y su descripción así
como los cálculos para llegar a ellos. Dichos cálculos incluyen la eficiencia del ciclo de
vapor, las pérdidas de calor en el receptor, la irradiación solar, etc.
Por último se plantean los resultados obtenidos mediante análisis paramétrico en SAM
obteniendo así la dimensión óptima de la central, siendo el múltiplo solar, que ya
explicaremos durante el estudio, el valor clave mediante el cual hemos llegado a ese
razonamiento.
Por último y para hacer una comparativa de diversos casos hemos realizado un último
capítulo en el que hemos variado ciertos parámetros para ver como influiría en el valor
del múltiplo solar así como en los valores de LCOE (coste nivelado de energía). Este
último concepto es fundamental en el análisis de rentabilidad de una central.
The study that we have done in this end-of-grade work focuses on the optimization of the solar multiple in solar thermoelectric solar panels with parabolic trough collectors. For this study, as we shall see below, we have taken into account a number of assumptions or hypotheses from the research. As for example the use of oil as heat transfer fluid or not taking into account any fossil fuel, ie there will be no hybridization, as a support during periods of non-irradiation. However, this type of power station has a storage system for the power to maintain the performance of the power block during periods of non-insolation. Our study will focus on a plant that does not have storage systems for which to determine a field size solar power with respect to rated electrical power is essential. Firstly we have analyzed a global and theoretical level the situation of renewable energies and the energy market in the world and specifically in Spain. On the other hand has been described in a concise way in what consist of CCP (parabolic-cylinder collectors) thermosolar plants. The study was carried out with the SAM Software (System Advisor Model), created by the National Laboratory of Renewable Energies. The steps followed with this program, the set parameters and their description as well as the calculations to reach them have been described in detail. Calculations include steam cycle efficiency, heat losses in the receiver, solar irradiation, etc. Finally, the results obtained by parametric analysis in SAM are presented, thus obtaining the optimum size of the plant, being the solar multiple, which we have already explained during the study, the key value during which we have arrived at this reasoning. Finally and to make a comparison of several cases we have made a last chapter in which we have varied parameters to see how to influence the value of the solar multiple as well as the LCOE values. This last concept is fundamental in the analysis of profitability of a plant.
The study that we have done in this end-of-grade work focuses on the optimization of the solar multiple in solar thermoelectric solar panels with parabolic trough collectors. For this study, as we shall see below, we have taken into account a number of assumptions or hypotheses from the research. As for example the use of oil as heat transfer fluid or not taking into account any fossil fuel, ie there will be no hybridization, as a support during periods of non-irradiation. However, this type of power station has a storage system for the power to maintain the performance of the power block during periods of non-insolation. Our study will focus on a plant that does not have storage systems for which to determine a field size solar power with respect to rated electrical power is essential. Firstly we have analyzed a global and theoretical level the situation of renewable energies and the energy market in the world and specifically in Spain. On the other hand has been described in a concise way in what consist of CCP (parabolic-cylinder collectors) thermosolar plants. The study was carried out with the SAM Software (System Advisor Model), created by the National Laboratory of Renewable Energies. The steps followed with this program, the set parameters and their description as well as the calculations to reach them have been described in detail. Calculations include steam cycle efficiency, heat losses in the receiver, solar irradiation, etc. Finally, the results obtained by parametric analysis in SAM are presented, thus obtaining the optimum size of the plant, being the solar multiple, which we have already explained during the study, the key value during which we have arrived at this reasoning. Finally and to make a comparison of several cases we have made a last chapter in which we have varied parameters to see how to influence the value of the solar multiple as well as the LCOE values. This last concept is fundamental in the analysis of profitability of a plant.
Description
Keywords
Software SAM (System Advisor Model), Múltiplo solar, LCOE (coste nivelado de energía), Centrales solares termoeléctricas, Thermosolar plants, Energía solar