Recursos de colección

Archivo Digital UPM (121.743 recursos)

This is an institutional repository providing access to the research output of the institution. Primarily contains thesis.

Materia = Energías Renovables

Mostrando recursos 1 - 20 de 210

  1. Valorización energética de la Biomasa Residual Agrícola de banano y mango en la región de Piura – Perú

    Carhuancho León, Fanny Mabel
    En el Perú se está impulsando el crecimiento económico de forma sostenible en base al aprovechamiento de las energías renovables. De forma similar a otros países, Perú se ha establecido como meta que el 20% de su matriz energética proceda de fuentes renovables para el 2040. Por este motivo, durante los últimos años, el gobierno peruano ha impulsado la promoción de biocombustibles (Ley Nº 28054) y energías renovables (Decreto legislativo 1002). Entre las diferentes fuentes renovables, el Perú tiene un potencial alto para el aprovechamiento de la biomasa residual agrícola (BRA) cuyo potencial es de 16 Mt año según los...

  2. Precision irrigation that reduces energy consumption

    Battilani, Adriano; Opfermann, Valentin; Narvarte Fernández, Luis
    Precision Irrigation is deemed the best solution to minimize adverse environmental impacts. Precision Irrigation is able to significantly reduce agricultural water and energy uses: photovoltaic irrigation systems

  3. Approach to Hybrid Energy Storage Systems Dimensioning for Urban Electric Buses Regarding Efficiency and Battery Aging

    Nájera Álvarez, Jorge; Moreno-Torres, Pablo; Lafoz Pastor, Marcos; Arribas, Jaime R.
    This paper focuses on Hybrid Energy Storage Systems (HESS), consisting of a combination of batteries and Electric Double Layer Capacitors (EDLC), for electric urban busses. The aim of the paper is to develop a methodology to determine the hybridization percentage that allows the electric bus to work with the highest efficiency while reducing battery aging, depending on the chosen topology, control strategy, and driving cycle. Three power electronic topologies are qualitatively analyzed based on different criteria, with the topology selected as the favorite being analyzed in detail. The whole system under study is comprised of the following elements: a battery...

  4. Sustainability of China’s electricity system; proposal for a structured analysis

    San Miguel Alfaro, Guillermo; Ornia, J.; Álvarez, S.; Gutiérrez, F.; Corona, B.; Wang, C.; Lu, X.; Song, Q.; Yao, Q.; Xu, W.; Lechón, Y.; Rúa, C. de la; Caldés, N.; Río, P. del
    A methodological framework has been designed to analyze the sustainability of China’s electricity sector in the wake of the 13th Development Plan for the Electricity Sector (2016-2020). The proposal is based on ISO 14040 but also incorporates some features from the "new LCA" approach described in the CALCAS project. Discussion is provided about its practical implementation, including definition of objectives through sustainability questions and subquestions, definition of scope, definition of scenarios, functional unit, selection of sustainability issues and indicators, suitability of analysis tools, availability of inventory data and aggregation methods to facilitate decision making.

  5. Assessment of explicit models for different photovoltaic technologies

    Pindado Carrion, Santiago; Cubas Cano, Javier; Roibás Millán, Elena; Bugallo Siegel, Francisco J.; Sorribes Palmer, Felix
    Accurate and simple mathematical models are usually required to assess the performances of photovoltaic devices. In particular, it is common practice to use explicit models to evaluate the current–voltage (I–V) performance curves, mainly based on simple analytical expressions that enable the parameters determination with a little computational effort. Six different explicit photovoltaic models (i.e., explicit I–V equations) by different authors (Akbaba & Alattawi; El-Tayyan; Karmalkar & Haneefa; Das/Saetre et al.; Das; and Pindado & Cubas) are analyzed and compared. This comparison is carried out by fitting these models to eight I–V curves for different technologies, including Si, Si polycrystalline, Ga–As,...

  6. Estudio del potencial de las embarcaciones solares en la Amazonía: Caso de estudio Río Napo

    Alvarado Ponce, Lenny
    La necesidad de incorporar energías renovables en los medios de transporte es un reto en el que se trabaja día a día, es por eso que el objetivo de este proyecto es el de contribuir a la reducción del uso de combustibles fósiles, y los efectos negativos que conlleva. El sector del transporte marítimo y fluvial es el menos desarrollado, a la fecha, en este sentido se ha estudiado el potencial que poseen las embarcaciones de la región amazónica del Perú, en el departamento de Loreto específicamente el río Napo donde el único medio de transporte es la vía fluvial,...

  7. Life Cycle Sustainability Analysis of an innovative configuration of Concentrated Solar Power technology

    Corona Bellostas, Blanca; San Miguel Alfaro, Guillermo
    The use of specific tools to quantify the sustainability of products and services is essential in order to develop human activities that are profitable for both society and the environment. To this purpose, Life Cycle Sustainability Analysis (LCSA) is being developed as a holistic tool to evaluate environmental, economic and social impacts of one product or service throughout their full life cycle. The methodology employed in this work is based on the LCSA Analysis approach and has been applied to evaluate the sustainability of a Concentrated Solar Power (CSP) plant based on HYSOL technology, an innovative configuration that delivers improved...

  8. Economic assessment of large power photovoltaic irrigation systems in the ECOWAS region

    Lorenzo Navarro, Celena; Hogan Teves de Almeida, Rita; Martínez Núñez, Margarita; Narvarte Fernández, Luis; Carrasco Moreno, Luis Miguel
    This paper presents an economic assessment of large power (from tens to hundreds kWp) PV irrigation systems in the ECOWAS region, evaluating the economic feasibility of substituting diesel-powered and grid-powered systems with PV ones. Seven countries from the ECOWAS region were considered and two irrigation operating modes were compared (pumping to a water tank or at constant pressure). Net Present Cost (NPC) values are in the 0.33-41.5 x 105 $ range, Internal Rate of Return (IRR) values are in the 8e47% range and Payback Period (PBP) values are in the 2.1e10 years range. The economic savings in terms of Levelized...

  9. Nueva concepción urbanística basada en la explotación de la energía solar: Cómo garantizar el soleamiento de las urbanizaciones

    Ibáñez González, Javier
    El objetivo de la tesis es acometer el estudio de un posible nuevo modelo urbanístico adaptado a la explotación de la energía solar. Ya que las ciudades existentes no fueron concebidas para utilizar el sol como fuente de energía se intenta presentar las condiciones que deben reunir las nuevas urbanizaciones para tener la posibilidad de aprovechar la energía brindada por el sol de forma tan extensa como mal explotada hasta la fecha. Se define el concepto clave de espacio urbano solar (e.u.s.) que garantiza un mínimo diario de horas de sol a todos los puntos situados en la línea perimetral...

  10. Monte Carlo simulation to analyze the performance of CPV modules

    Herrero Martin, Rebeca; Anton Hernandez, Ignacio; Sala Pano, Gabriel; De Nardis, Davide; Araki, Kenji; Yamaguchi, Masafumi
    A model to evaluate the performance of high concentrator photovoltaics (HCPV) modules (that generates current-voltage curves) has been applied together with a Monte Carlo approach to obtain a distribution of modules with a given set of characteristics (e.g., receivers electrical properties and misalignments within elementary units in modules) related to a manufacturing scenario. In this paper, the performance of CPV systems (tracker and inverter) that contain the set of simulated modules is evaluated depending on different system characteristics: inverter configuration, sorting of modules and bending of the tracker frame. Thus, the study of the HCPV technology regarding its angular constrains...

  11. A review of the promises and challenges of micro-concentrator photovoltaics

    Domínguez Domínguez, César; Jost, Norman; Askins, Stephen; Victoria Pérez, Marta; Anton Hernandez, Ignacio
    Micro concentrator photovoltaics (micro-CPV) is an unconventional approach for developing high-efficiency low-cost PV systems. The micrifying of cells and optics brings about an increase of efficiency with respect to classical CPV, at the expense of some fundamental challenges at mass production. The large costs linked to miniaturization under conventional serial-assembly processes raise the need for the development of parallel manufacturing technologies. In return, the tiny sizes involved allows exploring unconventional optical architectures or revisiting conventional concepts that were typically discarded because of large material consumption or high bulk absorption at classical CPV sizes.

  12. Increased efficiency of solar cells protected by hydrophobic and hydrophilic anti-reflecting nanostructured glasses

    Baquedano, Estela; Tomé, Lorena; Caño Fernández, Pablo; Postigo Resa, Pablo Aitor
    We investigated the fabrication of large-area (cm2) nanostructured glasses for solar cell modules with hydrophobic and hydrophilic properties using soft lithography and colloidal lithography. Both of these techniques entail low-cost and ease of nanofabrication. We explored the use of simple 1D and 2D nanopatterns (nanowires and nanocones) and the effect of introducing disorder in the nanostructures. We observed an increase in the transmitted light for ordered nanostructures with a maximum value of 99% for wavelengths >600 nm when ordered nanocones are fabricated on the two sides of the solar glass. They produced an increment in the efficiency of the packaged...

  13. Phosphorus diffusion gettering efficacy in upgraded metallurgical-grade solar silicon

    Jiménez Pagán, Alba; Cañizo Nadal, Carlos del; Cid, Carlos; Peral Boiza, Ana
    In the context of the continuous price reduction in photovoltaics (PV) in recent years, Si feedstock continues to be a relevant component in the cost breakdown of a PV module, highlighting the need for low-cost, low-capital expenditure (CAPEX) silicon technologies to further reduce this cost component. Upgraded metallurgical-grade silicon (UMG Si) has recently received much attention, improving its quality and even attaining, in some cases, solar cell efficiencies similar to those of conventional material. However, some technical challenges still have to be addressed when processing this material to compensate efficiently for the high content of impurities and contaminants. Adaptation of a...

  14. Experimental analysis and simulation of a production line for CPV modules: impact of defects, misalignments, and binning of receivers

    Herrero Martin, Rebeca; Anton Hernandez, Ignacio; Victoria Pérez, Marta; Domínguez Domínguez, César; Askins, Stephen; Sala Pano, Gabriel; De Nardis, Davide; Araki, Kenji
    An inherent characteristic of high concentrator photovoltaics (HCPV) modules is a tight mechanical tolerance caused by the narrow angular transmission of the optical system, typically below or close to 1°. Misalignments in the modules caused during the assembly process in the production line will degrade not only the electrical but also the angular performance of the module. Moreover, dispersion in the electrical characteristics of the elementary units comprising a module would lead also to power loss. Quality control and data analysis on the production line is of great significance for adjusting the production line and preserving the angular tolerance and...

  15. 1-D and 2-D Monte Carlo simulations for analysis of CPV module characteristics including the acceptance angle impacted by assembly errors

    Araki, Kenji; Nagai, Hirokazu; Herrero Martin, Rebeca; Anton Hernandez, Ignacio; Sala Pano, Gabriel; Lee, Kan-Hua; Yamaguchi, Masafumi
    CPV (Concentrator photovoltaic) requires accuracy in optical alignment. Optical misalignment in the module was measured and analyzed. Such information was useful to identify assembly problems and improved module performance. 1-D and 2-D Monte Carlo simulations were developed to analyze the impact of alignment errors by assembly errors. The 1-D simulation was useful to anticipate the power output of the module, whereas 2-D was for acceptance angle. The 2-D model showed that the gap from Pmp-based acceptance angle (Pmp: Power at the maximum power point) from that of Isc-based (Isc: Short-circuit current) was a function of deviation of assembles misalignment in...

  16. An end of service life assessment of PMMA lenses from veteran concentrator photovoltaic systems

    Miller, David C.; Khonkar, Hussameldin I.; Herrero Martin, Rebeca; Anton Hernandez, Ignacio; Johnson, David K.; Hornung, Thorsten; Schmid-Schirling, Tobias; Vinzant, Todd B.; Deutch, Steve; To, Bobby; Sala Pano, Gabriel; Kurtz, Sarah R.
    The optical performance of poly(methyl methacrylate) lenses from veteran concentrator photovoltaic modules was examined after the end of their service life. Lenses from the Martin-Marietta and Intersol module designs were examined from the “Solar Village” site near Riyadh, Saudi Arabia, as well as the Phoenix Sky Harbor airport, followed by the Arizona Public Service Solar Test and Research (APS-STaR) center in Tempe, Arizona. The various lens specimens were deployed for 20, 27, and 22 years, respectively. Optical characterizations included lens efficiency (Solar Simulator instrument), material transmittance and haze (of coupons cut from veteran lenses, then measured again after their faceted...

  17. Large-scale hybrid PV-grid irrigation system

    Hogan Teves de Almeida, Rita; Carrasco Moreno, Luis Miguel; Martínez Moreno, Francisco; Barata Carrelo, Isaac Afonso; Navarte Fernández, Luis
    This paper describes a 120 kWp hybrid PV-grid irrigation system at constant pressure, which has been installed in a 233 ha farm devoted to the intensive cultivation of olive trees in Tamelelt, Morocco. The description includes important information regarding system configuration, working control and implementation. In addition, monitoring data between July 18 and August 31, 2017, is analyzed and first results presented. The system has been working according to the initial expectations since July 2016 and in the 45 days currently under analysis, the number of irrigation hours were 251, being 71% the PV penetration. The PR of the system...

  18. "Tras la energía verde". Reseña de 'Energy Conscious Design: A Primer for Architects' y Brenda y Robert Vale, 'Green Architecture: Design for a Sustainable Future

    Sainz Avia, Jorge
    La crisis energética trajo consigo un aluvión de estudios sobre energías alternativas y sobre cómo aprovechar mejor las tradicionales. En el campo de la arquitectura, empezaron a proliferar los paneles solares y los muros gruesos con huecos pequeños. Pero la crisis se acabó y la preocupación también. Sin embargo, algunos profesionales y ciertos organismos internacionales siguen insistiendo en el tema.

  19. A one step method to produce boron emitters

    Silva, Jose A.; Amaro e Silva, R.; Peral Boiza, Ana; Cañizo Nadal, Carlos del
    A one-step method to obtain boron emitters for n-type solar cells based on the use of boron tribromide (BBr3) as a dopant source is developed. During this study several experimental parameters are varied. It is observed that besides the diffusion temperature, the nitrogen gas flux and the BBr3 bubbler temperature have a significant impact on the obtained emitter properties. Using the adequate experimental conditions a homogenous boron emitter without boron rich layer (BRL), a sheet resistance of 77 Ω sq−1 and a dark saturation current <100 fA cm−2 is obtained.

  20. Reliability of commercial triple junction concentrator solar cells under real climatic conditions and its influence on electricity cost

    Vázquez López, Manuel; Tamayo Arriola, Julen; Orlando, Vincenzo; Núñez Mendoza, Neftalí; Alburquerque del Hoyo, Olga; Algora del Valle, Carlos
    This paper proposes a methodology for assessing the concentrator solar cell reliability in a real application for a given location provided the results from accelerated life tests. We have applied this methodology for the evaluation of warranty times of commercial triple junction solar cells operating inside real concentrator modules in Golden (Colorado, USA), Madrid (Spain) and Tucson (Arizona, USA) for the period 2012–2015. Warranty times in Golden and Madrid, namely, 68 and 31 years, respectively, for the analysed period, indicate the robustness of commercial triple junction solar cells. Nevertheless, the warranty time of 15 years for Tucson suggests the need...

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