Examinando por Autor "Fuentes-Conde, Manuel"
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Ítem An experimental comparison between commercial hybrid PV-T and simple PV systems intended for BIPV(Elsevier, 2018) Fuentes-Conde, Manuel; Vivar, Marta; de la Casa, Juan; Aguilera-Tejero, JorgeThe idea of combining both thermal and photovoltaic collectors in hybrid photovoltaic-thermal (PV-T) modules actually shows a great potential for integration on facades and rooftops of buildings, mainly because of the reduced available space and the benefits of the on-site electricity and thermal generation. The objective of this work is to compare the real performance (experimental data obtained under real sun during a year) of a commercial hybrid PV-T system vs. a simple PV system using microinverters, assessing the suitability of one-unit hybrid PV-T systems vs. two separated units – PV systems + Thermal systems – for building integration. The combined efficiency over the span of a full day could reach values up to 80%, but this apparent high value needs to be analysed in detail. From the experimental results, it can be observed that both systems, PV and PV-T, have a good electrical performance. But the PV-T system output does not benefit from the lower module temperatures that it should achieve from the active cooling in its back, presenting the same performance as the simple PV system. Regarding the microinverters configuration performance, it has been very positive working with high efficiencies above 96%, justifying its use in this type of applications. In conclusion, the commercial PV-T system has not performed as expected, showing problems with the integration of the active cooling in the back of the PV modules. At this moment, and despite the potential of PV-T systems for BIPV due to space limitations, commercial PV-T systems are still far from PV and Thermal systems using separately.Ítem Análisis, caracterización y modelado del comportamiento en exterior de módulos de concentración fotovoltaica(Jaén : Universidad de Jaén, 2014) García-Domingo, Beatriz; Aguilera-Tejero, Jorge; Fuentes-Conde, Manuel; Universidad de Jaén. Departamento de Ingeniería Electrónica y Automática[ES] En la presente Tesis Doctoral se ha profundizado en el estudio y análisis del comportamiento eléctrico en exterior de módulos de tecnología de concentración fotovoltaica (CPV), así como en la dependencia de dicho comportamiento con las condiciones ambientales registradas. Entre ellas, para evaluar el comportamiento eléctrico de los módulos CPV, se han considerado: la irradiancia normal directa (DNJ), la distribución espectral de la irradiancia incidente -a través de dos índices alternativos: average photon energy (APE) y spectral matching ratio (SMR)-, la temperatura ambiente (Tamb) Y la velocidad del viento (Ws). A lo largo de esta Tesis Doctoral se han propuesto dos modelos de predicción de la potencia máxima entregada por los módulos CPV apoyándose en polinomios de regresión y técnicas de regresión lineal múltiple. Asimismo, se han implementado dos modelos basados en la utilizaciónÍtem Lessons learned from the field analysis of PV installations in the Saharawi refugee camps after 10 years of operation(Elsevier, 2018-10) Fuentes-Conde, Manuel; Vivar, Marta; Hosein, Hasena; Aguilera-Tejero, Jorge; Muñoz-Cerón, EmilioEnergy access at refugee camps is one of the main challenges to address in humanitarian response actions, especially on long-term situations. The lack of access to electricity depends, among other factors, on the local natural resources and available technologies. In this sense, solar photovoltaic is one of the most appropriate technologies, especially now with the decrease of the photovoltaic costs. But long-term performance, reliability and social acceptance must be ensured to facilitate the introduction of the technology and its rapid widespread in these humanitarian context. This work presents the results of a field study conducted at the Saharawi refugee camps, inspecting the photovoltaic systems installed in the health institutions after 10 years of use. Results show how despite the good initial system design and high quality of the PV components, the lack of training on operation and maintenance of the PV installations have led to a dramatic reduction of the lifetime of the systems. Strong training programs on basic photovoltaic concepts and operation and maintenance of systems are required to solve this problem and guarantee the long-term functioning of the installations.Ítem Lessons learned from the field analysis of PV installations in the Saharawi refugee camps after 10 years of operation(Elsevier, 2018) Fuentes-Conde, Manuel; Vivar, Marta; Hosein, Hasena; Aguilera-Tejero, Jorge; Muñoz-Cerón, EmilioEnergy access at refugee camps is one of the main challenges to address in humanitarian response actions, especially on long-term situations. The lack of access to electricity depends, among other factors, on the local natural resources and available technologies. In this sense, solar photovoltaic is one of the most appropriate technologies, especially now with the decrease of the photovoltaic costs. But long-term performance, reliability and social acceptance must be ensured to facilitate the introduction of the technology and its rapid widespread in these humanitarian context. This work presents the results of a field study conducted at the Saharawi refugee camps, inspecting the photovoltaic systems installed in the health institutions after 10 years of use. Results show how despite the good initial system design and high quality of the PV components, the lack of training on operation and maintenance of the PV installations have led to a dramatic reduction of the lifetime of the systems. Strong training programs on basic photovoltaic concepts and operation and maintenance of systems are required to solve this problem and guarantee the long-term functioning of the installations.