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1 to 50 of 286 results
  • Micro-scale wind resource assessment for off-grid electrification projects in rural communities. A case study in Peru

     Ranaboldo, Matteo; Ferrer Marti, Laia; Velo Garcia, Enrique
    International journal of green energy
    Vol. 11, num. 1, p. 75-90
    DOI: 10.1080/15435075.2013.769878
    Date of publication: 2014
    Journal article

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    The proper identification of locally available renewable energy resources are key issues in the project design of off-grid rural electrification systems to improve effectiveness and long-term sustainability. In recent decades, a number of computer tools have been created to improve micro-scale wind resource assessment and their use is a de-facto standard, for instance, in wind farm design. However, these tools are not used in off-grid rural electrification projects in remote areas in developing countries because some characteristics of the projects are out of models' operational limits (limited and inaccurate information available and steep terrains) and their applicability and performance in those contexts has not been studied. The aim of this study is to evaluate and optimize the performance of a micro-scale model for its application for resource estimation in rural electrification projects, considering their specific characteristics. The analyses are based on data collected in two communities in the Andean mountains of Peru. Sensitivity analyses are carried out to evaluate the influence of the main input data on assessment accuracy. Although limitations and constraints of these projects, the results show that the model performance is good and the resulting resource map is accurate in the typical area of a community project. Thus, analyzed micro-scale model and procedure prove to be suitable for wind resource studies at the community scale; its use in the design of the electrification project of Alto Peru (Peru) is given as an example.

  • Desarrollo de capacidades: CEDECAP, Centro de demostración y capacitación en tecnologías apropiadas

     Escobar, Rafael; Vilar Ferrenbach, David; Velo Garcia, Enrique; Ferrer Marti, Laia; Domenech Lega, Bruno
    Date of publication: 2013-12
    Book chapter

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  • Transversalitzant el DHS a les ensenyances tècniques a l'entorn de Barcelona

     Velo Garcia, Enrique; Giné Garriga, Ricard; Pérez Foguet, Agustí
    Competitive project

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  • Cross-cutting development education into technology studies

     Velo Garcia, Enrique; Giné Garriga, Ricard; Pérez Foguet, Agustí
    Competitive project

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  • Evaluating and comparing three community small-scale wind electrification projects

     Ferrer Marti, Laia; Garwood, Anna; Chiroque, José; Ramirez, Benito; Marcelo, Oliver; Garfi, Marianna; Velo Garcia, Enrique
    Renewable and sustainable energy reviews
    Vol. 16, p. 5379-5390
    Date of publication: 2012
    Journal article

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    Electrificationsystemsbasedonrenewableenergyhaveprovensuitableforprovidingelectricity autonomouslytoruralcommunities.Amongthetechnicaloptionsavailable,windsystemsare increasinglygettingattention.InthenorthernmountainsofPeru,at3800m.a.s.l.,threecommunity wind electrificationprojectshavebeenimplemented.Thetechnicalsolutionsusedineachprojectare different:windvs.hybridphotovoltaic-windsystems;individualequipmentvs.microgrids.Thisstudy aims todescribe,evaluateandcomparethesethreesmall-scalecommunitywindelectrification projects.Theevaluationofthethreeprojectswascarriedoutbycomparingpreviousandpresent scenario;attentionhasbeenfocusedonprojectdesignandtechnicalaspects,socio-economicimpacts and sustainabilityandmanagementmodel.Thesethreeexamplesshedlightonboththeadvantages and disadvantagesofdifferenttechnologicaloptionsaswellasonappropriatecommunity-level managementmodels

  • Design of regional and sustainable bio-based networks for electricity generation using a multi-objective MILP approach

     Pérez Fortes, Maria del Mar; Lainez Aguirre, Jose Miguel; Arranz Piera, Pol; Velo Garcia, Enrique; Puigjaner Corbella, Luis
    Energy
    Vol. 44, num. 1, p. 79-95
    DOI: 10.1016/j.energy.2012.01.033
    Date of publication: 2012-08
    Journal article

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    Biomass energy systems can be employed to meet the requirements of distributed energy systems in rural as well as urban contexts, whether this is an electrification or a microgeneration project. This work is focused on a mathematical programming approach applied to bio-based supply chains that use locally available biomass at or near the point of use in order to produce electricity or other bioproduct. The problem of designing and planning a regional biomass supply chain is formulated as a MO-MILP (multi-objective mixed integer linear program), which takes into account three main objectives: economic, environmental and social criteria. The model supports decision-making about location and capacity of technologies, connectivity between the supply entities, biomass storage periods, matter transportation and biomass utilisation. The advantages of this approach are highlighted by solving a case study of a specific district in Ghana. The aim is to determine the most suitable biomass and electricity network among the different communities. The technology considered to transform the biomass into electricity is gasification combined with a gas engine.

    Biomass energy systems can be employed to meet the requirements of distributed energy systems in rural as well as urban contexts, whether this is an electrification or a microgeneration project. This work is focused on a mathematical programming approach applied to bio-based supply chains that use locally available biomass at or near the point of use in order to produce electricity or other bioproduct. The problem of designing and planning a regional biomass supply chain is formulated as a MO-MILP (multi-objective mixed integer linear program), which takes into account three main objectives: economic, environmental and social criteria. The model supports decision-making about location and capacity of technologies, connectivity between the supply entities, biomass storage periods, matter transportation and biomass utilisation. The advantages of this approach are highlighted by solving a case study of a specific district in Ghana. The aim is to determine the most suitable biomass and electricity network among the different communities. The technology considered to transform the biomass into electricity is gasification combined with a gas engine.

  • Evaluating benefits of low-cost household digesters for rural Andean communities

     Garfi, Marianna; Ferrer Marti, Laia; Velo Garcia, Enrique; Ferrer Martí, Ivet
    Renewable and sustainable energy reviews
    Vol. 16, num. 10, p. 575-581
    DOI: 10.1016/j.rser.2011.08.023
    Date of publication: 2012-01
    Journal article

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  • Promoting and improving renewable energy projects through local capacity development

     Escobar, Rafael; Vilar, David; Velo Garcia, Enrique; Ferrer Marti, Laia; Domenech Lega, Bruno
    DOI: 10.5772/2283
    Date of publication: 2012-05
    Book chapter

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  • Optimizing microwind rural electrification projects. A case study in Peru

     Ferrer Marti, Laia; Pastor Moreno, Rafael; Capó Plaza, Gregori Miquel; Velo Garcia, Enrique
    Journal of global optimization
    DOI: 10.1007/s10898-011-9697-y
    Date of publication: 2011
    Journal article

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    Electrification systems based on the use of renewable energy sources are suitable for providing electricity to isolated communities autonomously. Specifically, electrification by wind power is one of the technological options that have been used recently in projects implemented in the Andean highlands of Peru. To date, these projects have tended to install individual microwind turbines at each demand point. Alternatively, we propose a solution that considers both individual generators and microgrids.We develop a mathematical model that gives the location and size or type of the wind turbines and the design of the microgrids, taking into account the demand of the consumption points and the wind potential. The criterion is the minimization of the initial investment cost required to meet the demand. The model is validated by application to a real case in the northern highlands of Peru. Results show that microgrids are used despite the village dispersion, and the solutions significantly reduce the initial investment costs.

  • Biogas production in low-cost household digesters at the Peruvian Andes

     Ferrer Martí, Ivet; Uggetti, Enrica; Ferrer Marti, Laia; Calderón, Arcadio; Velo Garcia, Enrique; Garfi, Marianna
    Biomass and bioenergy
    Vol. 35, num. 5, p. 1668-1674
    DOI: 10.1016/j.biombioe.2010.12.036
    Date of publication: 2011-05
    Journal article

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  • Optimal location of gasification plants for electricity production in rural areas

     Pérez Fortes, Maria del Mar; Arranz Piera, Pol; Lainez Aguirre, Jose Miguel; Velo Garcia, Enrique; Puigjaner Corbella, Luis
    Computer aided chemical engineering
    Vol. 29, num. 2011, p. 1809-1813
    DOI: 10.1016/B978-0-444-54298-4.50140-9
    Date of publication: 2011
    Journal article

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  • Conceptual Design of Alternative Energy Systems from Biomass  Open access

     Pérez Fortes, Maria del Mar
    Department of Chemical Engineering, Universitat Politècnica de Catalunya
    Theses

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    El sector energético se está dirigiendo hacia un nuevo paradigma, favoreciendo la aparición de procesos de conversión más eficientes, el uso de las fuentes de energía renovables y la micro-generación. La bioenergía es una solución prometedora para la futura combinación de energías. Los conceptos de ingeniería deben de integrarse junto con los aspectos económicos, ambientales y sociales en el desarrollo de proyectos. Los sistemas de energía centralizados y distribuidos necesitan enfoques a medida para explotar las características de cada posible sistema. Esta tesis investiga el potencial del sector bioenergético, mediante el estudio de la gasificación de biomasa a través de técnicas avanzadas de modelización de procesos y de la incorporación de la gestión de la cadena de suministro, en el marco del diseño conceptual para la toma de decisiones. Los sistemas estudiados son: (i) gasificación integrada con ciclo combinado y con métodos de captura y almacenamiento de CO2 (IGCC-CCS, 285 MWe) para los sistemas de energía centralizados, y (ii) un gasificador de biomasa combinada con un motor de gas (BG-GE, 14 kWe) para los sistemas de energía distribuidos. La superestructura concebida puede ser utilizada en el diseño preliminar de alternativas para los diferentes procesos considerados, para adaptar los ya existentes y para adquirir conocimiento sobre las condiciones de operación de plantas de gasificación. El problema de optimización multi-objetivo considerado evalúa el equilibrio entre los criterios técnico-económicos y ambientales de 25 escenarios, con mezclas de diferentes materias primas y cambios topológicos: mezclas de carbón, coque y biomasa y la generación de electricidad a partir de gas de síntesis, la generación de electricidad a partir de H2 y la producción de H2 puro, considerando o no el uso del gas de purga del PSA en el ciclo combinado. El análisis de Pareto revela que como mejores escenarios el que utiliza coque de petróleo como materia prima para producir H2, con reciclo del gas de purga del PSA y el que utiliza biomasa residual sin reaprovechamiento del gas de purga del PSA. La implementación de la tecnología CCS conlleva una penalización en la eficiencia de un 8,7% en términos de potencia neta, si el H2 se utiliza en el ciclo combinado. La gestión de cadenas de suministro de sistemas centralizados, señalan que España tiene potencial de biomasa residual, invirtiendo en nuevas centrales IGCC-CCS, o para producir electricidad mediante co-combustión en las centrales térmicas de carbón ya existentes. Para el primer caso, el valor actual neto óptimo es 230 millones de € para un periodo considerado de 25 años. Para el segundo caso, se ha calculado que las políticas de subvención en este tipo de proyectos deben de tener en cuenta la sostenibilidad económica, cubriendo en un rango de 5,84% a 20,25% el aumento de los precios de la electricidad. El caso de estudio propuesto y optimizado como ejemplo de un sistema distribuido tiene en cuenta una comunidad de Ghana en el marco de la electrificación rural, a abastecer con peladuras de yuca y mediante sistemas BG-GE. Los resultados revelan una red inviable. De las cadenas de suministro resultantes como óptimas, se puede deducir que cierto nivel de centralización es necesario para que las propuestas sean sostenibles en el tiempo. El sector de la bioenergía cumple ofrece ventajas en términos de impacto ambiental y social. Su implementación es posible con el apoyo de las tecnologías actuales de conversión de energía. Los principales retos están en la mejora de los procesos de pretratamiento de la biomasa y en su almacenamiento. La conversión de la biomasa, junto con los métodos de captura y almacenamiento de CO2, necesitan de incentivos políticos para poder penetrar definitivamente en el mercado, como sería el caso de cualquier otra tecnología alternativa de conversión de energía

    The energy sector faces a new energy paradigm, with more efficient conversion processes, renewable sources and micro-generation. Bioenergy is a promising solution. Engineering aspects must be integrated with economic, environmental and social aspects in bioenergy projects. Biomass properties enhancement is crucial. It concerns energy and matter densifications, for stabilisation and easier transport. Tailor-made approaches are needed to account for the characteristics of each potential system, being it centralised or distributed. This thesis has assessed the bioenergy potential using advanced modelling techniques, enlarged with supply chain management strategies, in the framework of conceptual design for decision-making. The studied energy systems are (i) an integrated gasification combined cycle power plant combined with carbon capture and storage (IGCC-CCS, 285 MWe) for centralised energy systems, and (ii) a biomass gasifier with a gas engine (BG-GE, 14 kWe) for distributed energy systems. Process system modelling and optimisation approaches are integrated with supply chain management to analyse co-gasification and co-production of electricity and hydrogen alternatives in IGCC-CCS, and co-combustion of biomass and coal in pulverised coal power plants in the light of economic and environmental considerations. Process modelling is integrated with supply chain management optimisation for rural electrification by BG-GE systems, considering economic, environmental and social issues. The superstructure can be used for the design of process alternatives, retrofit of existing ones and to gain knowledge on operation of IGCC-CCS. The multi-objective optimisation problem evaluates the trade-off between techno-economic and environmental criteria of 25 scenarios. Considerations comprise different coal, petcoke and biomass combinations and electricity generation from syngas, electricity generation from H2 and purified H2 production without and with PSA purge gas use in the combined cycle. The Pareto frontier analyses reveals that the scenario with petcoke as feedstock for H2 production with PSA flue gas profit is the best in terms of techno-economic optimisation. The scenario with residual biomass without PSA flue gas profit is the best in terms of environmental optimisation. CCS technology implementation leads to an efficiency penalty of 8.7% in net power terms if H2 is used in the IGCC. To maintain the same power level than that obtained with the combustion of syngas, the feedstock should be increased by 21% on a mass basis. Supply chain studies highlight, for Spain, a huge biomass waste potential for electricity and H2 production by investing on new IGCC-CCS power plants, or adaptation of existing plants. For the first case, the optimal NPV is around 230M€ for a period of 25 years. The sensitivity of the optimal solutions to changes in prices is demonstrated. For the second case, policy subsidies or alternatively price increases range from 5.84% to 20.25%. The investment is within 549M€ and 1640M€. A supply chain in a specific community from Ghana is proposed for rural electrification using cassava peels. Optimisations considers 9 communities and an overall electricity demand of 118 MWh/yr. The results reveal an unviable network. From the resulting networks, distributed approaches need a certain level of centralisation to be feasible on time. Bioenergy offers decisive advantages in terms of environmental and social impacts. Its deployment is straightforward to support with current energy conversion technologies. Challenges concern the biomass pre-treatment and storage. Despite all the striking advantages, political incentives are needed for definitive market entry, as would be the case for any energy conversion alternative.

  • Investigación en la caracterización de recursos y consumos energéticos de la biomasa en las zonas de selva amazónica del Perú

     Calle Maraví, José Luis; Velo Garcia, Enrique; Ferrer Marti, Laia; RAMIREZ CANDIA, JUDITH MARÍA; Arranz Piera, Pol; GONZÁLEZ MORA, HÉCTOR ENRIQUE
    Competitive project

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  • Fomento del desarrollo agrícola en zonas no conectadas a red mediante el uso de tecnologías de la bioenergía y otras fuentes renovables

     Velo Garcia, Enrique; CHONGO CUAMBA, BOAVENTURA; Horta Sellares, Frederic; Tsamba, Alberto Julio; Ferrer Marti, Laia; Arranz Piera, Pol; Falcão, Mário Paulo Pereira da Silva
    Competitive project

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  • IGCC power plants : conceptual design and techno-economic optimization

     Pérez Fortes, Maria del Mar; Bojarski, Aaron David; Velo Garcia, Enrique; Puigjaner Corbella, Luis
    Date of publication: 2011
    Book chapter

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  • Small scale bio-chp systems. Pilot plant approach

     Escorcia Robles, Bryani; Cuba Arroyo, Carlos; Pérez Fortes, Maria del Mar; Arranz Piera, Pol; Espuña Camarasa, Antonio; Velo Garcia, Enrique
    European Biomass Conference and Exhibition
    p. 1381-1383
    DOI: 10.5071/19thEUBCE2011-VP2.3.6
    Presentation's date: 2011-06
    Presentation of work at congresses

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    Nowadays, renewable energy sources aim at reaching the changes required to address the impact of global warming, alleviate poverty and replace conventional fossil fuel energy sources. Biomass has a promising future as a renewable source of energy that can supply the demand of a modern society in industrialized and developing countries. This work is focused on small scale biomass gasification as the alternative for distributed power generation from different types of biomass sources and it tries to avoid technical, financial and institutional problems in a 15 kg·h-1 pilot plant with downdraft fixed-bed gasifier. At the same time, it pretends to improve the overall energy efficiency of the system under the CHP concept, which it currently is between 15 to 25%. Gas quality represents one of the key parameters for a successful operation of the system and the presence of particles and tars is usually one of the main barriers to overcome. To achieve the removal of these contaminant compounds, an efficient system to clean the producer gas is expected to be applied in the UPC pilot plant. Furthermore, a complex remote real time monitoring and control system is under development which will lead to adequate operation performance.

  • Guidelines to introduce biomass systems in decentralised electrification programmes for MDG achievement in the sub Saharan African context. Case studies of two reference countries: Ghana and Mozambique

     Arranz Piera, Pol; Horta Sellares, Frederic; Velo Garcia, Enrique
    European Biomass Conference and Exhibition
    p. 2416-2422
    Presentation's date: 2011-06
    Presentation of work at congresses

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  • Biogas production in low-cost household digesters at high altitude

     Garfi, Marianna; Ferrer Marti, Laia; Velo Garcia, Enrique; Ferrer Martí, Ivet
    Micro Perspectives for Decentralized Energy Supply
    p. 37
    Presentation's date: 2011-04
    Presentation of work at congresses

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  • Bio-based sustainable supply chain modelling for rural electrification

     Pérez Fortes, Maria del Mar; Arranz Piera, Pol; Lainez Aguirre, Jose Miguel; Velo Garcia, Enrique; Puigjaner Corbella, Luis
    European Biomass Conference and Exhibition
    p. 2738-2743
    Presentation's date: 2011-06
    Presentation of work at congresses

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    Small scale gasification systems are employed to meet the requirements of distributed energy systems using locally available biomass at or near the point of use, or pre­treated biomass, such as pellets, bought from an established market. Small scale gasification systems can be employed in rural or urban contexts in both, industrialized or developing areas. This paper describes a supply chain management approach generally formulated and concretely applied to a specific case study located in Atebubu district (Ghana), which uses cassava peels as raw material. The problem is defined as a multi­objective mixed integer linear program considering two main criteria, the net present value and the environmental impact through Impact 2002+ indicator. Taking into consideration rural development in a developing country, the energy models should also deal with social criteria. The technology used to satisfy the electricity demand is a biomass gasifier combined with a gas engine.

  • Optimal location of gasification plants for electricity production in rural areas

     Pérez-Fortes, Mar; Arranz-Piera, Pol; Lainez Aguirre, Jose Miguel; Velo Garcia, Enrique; Puigjaner Corbella, Luis
    European Symposium on Computer Aided Process Engineering
    p. 1809-1813
    Presentation's date: 2011-06-01
    Presentation of work at congresses

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  • Estudio cinético del aprovechamiento energético de maderas residuales (I)

     Reina Hernandez, Joaquin A.; Velo Garcia, Enrique; Puigjaner Corbella, Luis
    Ingeniería química
    Vol. 42, num. 483, p. 94-100
    Date of publication: 2010-06
    Journal article

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    En esta primera parte del artículo, se estudia experimentalmente la cinética de la descomposición térmica de cinco tipos diferentes de madera residual por medio de ensayos dinámicos realizados por análisis termogravimétrico (TGA) en atmósfera oxidante (aire). Los resultados demuestran que dos etapas caracterizan a este proceso: pirólisis y combustión. La composición química de cada tipo de madera desempeña un rol fundamental en su comportamiento cinético. Reviste interés el grado de carbonización alcanzado (porcentaje en carbono) por la muestra como variable que identifica los procesos de combustión y pirólisis.

  • Estudio cinético del aprovechamiento energético de maderas residuales (y III): influencia de la atmósfera de reacción y tipo de madera

     Reina Hernandez, Joaquin A.; Velo Garcia, Enrique; Roca Mussons, Fco. Javier; Puigjaner Corbella, Luis
    Ingeniería química
    Vol. 42, num. 488, p. 102-106
    Date of publication: 2010-11
    Journal article

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    Programa d¿investigació aplicada per a l¿impuls del desenvolupament energètic rural en Països en Desenvolupament ¿ PRIADER  Open access

     Velo Garcia, Enrique; Ferrer Marti, Laia; Ferrer Martí, Ivet; Batet Miracle, Lluis; Clos Costa, Daniel; Gomis Bellmunt, Oriol
    Date: 2010-03
    Report

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    Informe final de la convocatòria de subvencions destinades a donar suport a projectes de sensibilització, educació, formació, capacitació i recerca en l’àmbit de cooperació al desenvolupament impulsats per determinats agents universitaris dins l’exercici 2008 (codi de convocatòria U2008)

  • Manual para la evaluación de la demanda, recursos hídricos, diseño e instalación de microcentrales hidroeléctricas

     Davila, Celso; Vilar Ferrenbach, David; Villanueba, Gilberto; Quiroz, Luis
    Date of publication: 2010-09
    Book

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  • Fuel (Guildford)

     Velo Garcia, Enrique
    Collaboration in journals

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  • AGAPUTE - Advanced gas purification technologies for co-gasification of coal, refinery by-products, biomass & waste, targeted to clean power produced from gas & steam turbine generator sets and fuel cells. FINAL REPORT

     Di Donato, Antonello; Puigjaner Corbella, Luis; Velo Garcia, Enrique; Nougues, Jose Maria; Pérez Fortes, Maria del Mar; Bojarski, Aaron David
    Date: 2010-02
    Report

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    Informe Final del Projecte ECSC RFC-CR-04006: AGAPUTE - Advanced gas purification technologies for co-gasification of coal, refinery by-products, biomass & waste, targeted to clean power produced from gas & steam turbine generator sets and fuel cells

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    Improving energy access in rural sub-Saharan Africa  Open access

     Velo Garcia, Enrique; Ferrer Marti, Laia; Arranz Piera, Pol; Horta Sellares, Frederic
    Date: 2010-03
    Report

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    XVII Convocatòria d’ajuts a accions de cooperació - 2009 GRECDH – UPC. Improving Energy Access In Rural sub- Saharan Africa. O-006/09. Informe

  • EXTENDIENDO LOS HORIZONTES PRODUCTIVOS FRENTE A LA PARADOJA DE LA INTEGRACIÓN

     Gallego Piñol, Eva; Kopanos, Georgios; Capon Garcia, Elisabet; Yamal Turbay, Evelyn; Zamarripa Pérez, Miguel Ángel; Silvente Saiz, Javier; Moreno Benito, Marta; Pérez Moya, Montserrat; Bojarski, Aaron David; Graells Sobre, Moises; Monroy Chora, Isaac; Abdelaleem Taha Ziez, Ahmed Shokry; Muñoz Mata, Edrisi; Roca Mussons, Fco. Javier; Velo Garcia, Enrique; Perales Lorente, Jose Francisco; Puigjaner Corbella, Luis; Nougues, Jose Maria; Espuña Camarasa, Antonio
    Competitive project

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  • Energy Access for the poor in Sub-Saharan Africa to meet the Millennium Development Goals

     Arranz Piera, Pol; Velo Garcia, Enrique
    Competitive project

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  • Biomass supply chain model for rural electrification

     Pérez Fortes, Maria del Mar; Arranz Piera, Pol; Lainez Aguirre, Jose Miguel; Velo Garcia, Enrique; Puigjaner Corbella, Luis
    AIChE Annual Meeting
    p. 1-2
    Presentation's date: 2010-11-08
    Presentation of work at congresses

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    Adaptación de biodigestores tubulares de plástico a climas fríos  Open access

     Poggio, Davide; Ferrer Martí, Ivet; Batet Miracle, Lluis; Velo Garcia, Enrique
    Livestock research for rural development
    Vol. 21, num. 9, p. 1-14
    Date of publication: 2009
    Journal article

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    Farmers in the Andean Plateau strongly demand for household biodigesters due to the lack of clean fuels and agricultural fertilizers, and the abundance of livestock residues. The diffusion of rural biodigesters in cold climate or mountainous rural zones has been traditionally scarce. The unfavorable relationship between low temperatures and the kinetics of biogas production poses a technological barrier to the implementation of low cost biodigesters. Since 2006, the Research Group on Development Cooperation and Human Development (GRECDH) from the Technical University of Catalonia (UPC), in collaboration with the Peruvian NGO Institute for an Alternative Agriculture (IAA), investigates on the development of household biodigesters adapted to extreme conditions of the Andean Plateau (3000-4500 m). This article describes the research project and its main findings.

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    Biodigestores de bajo coste para climas andinos  Open access

     Poggio, Davide; Paiva Prado, Margot; Ferrer Martí, Ivet; Velo Garcia, Enrique
    Revista brasileira de agroecologia
    Vol. 4, num. 2, p. 4508-4511
    Date of publication: 2009-11-09
    Journal article

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    En el Altiplano Andino existe una alta demanda de biodigestores anaeróbicos por parte de los pequeños productores ganaderos, a causa del escaso acceso a combustibles limpios y a fertilizantes eficientes, y a la abundancia de residuos agropecuarios. La difusión de biodigestores rurales en zonas montañosas o de clima frío ha sido tradicionalmente escasa, sobre todo a causa de la relación desfavorable entre las bajas temperaturas y la velocidad de la digestión. Durante el periodo 2007-2009 se han implementado 13 digestores familiares del tipo tubular de plástico en la región del Cusco en Perú. Se han introducido y probado soluciones de diseño solar pasivo que han permitido mejorar el funcionamiento de la tecnología. Asimismo se han probado nuevos materiales y tecnologías de fabricación que permiten aumentar la vida útil de los digestores.

  • Conceptual model and evaluation of generated power and emissions in an IGCC plant

     Pérez Fortes, Maria del Mar; Bojarski, Aaron David; Velo Garcia, Enrique; Nougues, Jose Maria; Puigjaner Corbella, Luis
    Energy
    Vol. 34, num. 10, p. 1721-1732
    DOI: 10.106/j.energy.2009.05.012
    Date of publication: 2009-05-12
    Journal article

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    This work develops a design and operation support tool for an Integrated Gasification Combined Cycle (IGCC) power plant, which allows the efficiency and environmental issues of alternative process designs and feedstock to be assessed. The study is based on a conceptual model of an IGCC plant, validated with data from the ELCOGAS power plant in Spain. The layout of the model includes an Air Separation Unit (ASU), a Pressurized Entrained Flow (PRENFLO) gasifier, a series of purification gas units (venturi scrubber, sour water steam stripper, COS hydrolysis reactor, MDEA absorber columns and a sulphur recovery Claus plant), a Heat Recovery Steam Generator (HRSG) and a Combined Cycle (CC) system. It comprises steady state models. One of the purposes of this work is to analyze the feasibility of coal co-gasification using waste materials; specifically petcoke and olive pomace (orujillo) are considered here. The model has been developed in Aspen Hysys. It uses electrolyte models that have been implemented in Aspen Plus which are connected to Aspen Hysys bymeans of Artificial Neural Networks (ANNs) models. Results of the model’s, gas composition and generated power, are in agreement with the industrial data.

  • Influence of Secondary Reactions on the Heat of Pyrolysis of Biomass

     Gomez Diaz, Claudia J.; Velo Garcia, Enrique; Barontini, Federica; Cozzani, Valerio
    Industrial & engineering chemistry research
    Vol. 48, num. 23, p. 10222-10233
    DOI: 10.1021/ie9007985
    Date of publication: 2009-12
    Journal article

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  • Journal of cleaner production

     Velo Garcia, Enrique
    Collaboration in journals

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  • CENTRE D'ENGINYERIA DE PROCESSOS I MEDI AMBIENT (CEPIMA)

     Nougues, Jose Maria; Pérez Moya, Montserrat; Graells Sobre, Moises; Roca Mussons, Fco. Javier; Perales Lorente, Jose Francisco; Velo Garcia, Enrique; Puigjaner Corbella, Luis; Monroy Chora, Isaac; Yamal Turbay, Evelyn; Zamarripa Pérez, Miguel Ángel; Silvente Saiz, Javier; Muñoz Mata, Edrisi; Abdelaleem Taha Ziez, Ahmed Shokry; Bojarski, Aaron David; Kopanos, Georgios; Capon Garcia, Elisabet; Moreno Benito, Marta; Pérez Fortes, Maria del Mar; Gallego Piñol, Eva; Espuña Camarasa, Antonio
    Competitive project

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    Energy management for stand-alone renewable energy systems (E-MAN-RES)  Open access

     Velo Garcia, Enrique; Ferrer Marti, Laia; Guilera Giralt, Anna
    Date: 2009-10
    Report

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    L’objecte del present informe és la descripció dels treballs duts a terme en l’Activitat 2 del projecte E-MAN-RES: models de simulació i càlcul per optimització i anàlisi de sensibilitat de la gestió de la demanda, per part de la Universitat Politècnica de Catalunya.

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    Promoció de sistemes micro-eòlics i desenvolupament de capacitats en energia renovable en països en desenvolupament  Open access

     Velo Garcia, Enrique; Ferrer Marti, Laia
    Date: 2009-03
    Report

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    Informe final del projecte realitzat per al Centre de Cooperació per al Desenvolupament de la UPC.

  • Integrated tool for IGCC power plants design.

     Pérez Fortes, Maria del Mar; Bojarski, Aaron David; Velo Garcia, Enrique; Nougues, Jose Maria; Puigjaner Corbella, Luis
    AIChE Annual Meeting
    p. 73-75
    Presentation's date: 2009-11-08
    Presentation of work at congresses

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    Integrated tool for IGCC power plants, emissions and cost predictions  Open access

     Bojarski, Aaron David; Velo Garcia, Enrique; Nougues, Jose Maria; Puigjaner Corbella, Luis; Pérez Fortes, Maria del Mar
    World Congress of Chemical Engineering
    p. 512-516
    Presentation's date: 2009-08-24
    Presentation of work at congresses

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    This work tackles the question of power generation by means of gasification. Growing economies and global warming are important challenges these years: so that cleaner and more efficient power plants designs have to be achieved. In this context, Integrated Gasification Combined Cycle (IGCC) power plants have an important role, due to their more efficient way of producing energy since fossil fuels. Actions are focused on clean power and H2 from coal, and also in bioproducts. So, one of the future of coal-based power generation strategies should be CO2 transport and storage in order to obtain a purer hydrogen stream. This work proposes a tool for estimating final plant outputs and economics for different scenarios. The technical performance has been modeled in Aspen Hysys and Aspen Plus, and models have been validated with real power plant data. Comparisons, in terms of power, emissions, efficiencies and costs between sixteen different plant designs are presented: they enhance differences in raw material, purification units layout, and hydrogen obtention.

  • Producció de biogàs a partir de residus orgànics en biodigestors de baix cost

     Ferrer Martí, Ivet; Uggetti, Enrica; Jaime, Martí; Velo Garcia, Enrique
    Congrés UPC Sostenible 2015
    p. 21-22
    Presentation's date: 2009-07
    Presentation of work at congresses

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  • Integrated Tool for IGCC Power Plants, Emissions and Cost Predictions

     Pérez Fortes, Maria del Mar; Bojarski, Aaron David; Velo Garcia, Enrique; Nougues, Jose Maria; Puigjaner Corbella, Luis
    World Congress of Chemical Engineering
    Presentation's date: 2009-08-24
    Presentation of work at congresses

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  • Biomass and waste gasification: feasible contributions in industrialised and rural areas

     Pérez Fortes, Maria del Mar; Bojarski, Aaron David; Velo Garcia, Enrique; Puigjaner Corbella, Luis
    European Biomass Conference and Exhibition
    p. 732-739
    Presentation's date: 2009-06-30
    Presentation of work at congresses

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    Electrificación rural con sistemas microeólicos: optimización del diseño  Open access

     Ferrer Marti, Laia; Pastor Moreno, Rafael; Ranaboldo, Matteo; Capó Plaza, Gregori Miquel; Velo Garcia, Enrique
    Congreso Peruano de Investigación de Operaciones y de Sistemas
    Presentation's date: 2009-11
    Presentation of work at congresses

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    Los sistemas de electrificación basados en el aprovechamiento de fuentes de energía renovables han demostrado ser adecuados para proveer de electricidad a comunidades aisladas de forma autónoma. En concreto, la electrificación mediante energía eólica es una de las opciones tecnológicas utilizadas recientemente en proyectos implementados en la sierra andina de Perú. Hasta ahora, estos proyectos se han diseñado bajo el concepto de instalaciones individuales en cada punto de consumo. Como alternativa, se propone un diseño que considera la combinación de equipos individuales aislados con la generación y distribución de electricidad mediante una o varias microrredes. La localización de los diferentes tipos de aerogeneradores y el diseño de la(s) microrred(es) se decide considerando el recurso eólico de cada punto y la localización y la demanda de los puntos de consumo. Esta alternativa de diseño incorpora la opción de utilizar equipos de generación de más potencia, proporcionalmente más baratos, y evita condicionar el consumo de una familia al recurso eólico disponible en su domicilio. En este trabajo se presenta un proceso de evaluación de recurso eólico y un modelo matemático de programación lineal entera y mixta para el diseño de sistemas eólicos. El proceso de evaluación de recurso y los resultados del modelo del modelo se validan mediante la aplicación a un caso real implementado en la sierra norte de Perú. Los resultados obtenidos reducen los costes de inversión inicial y utilizan pequeñas microrredes, a pesar de la dispersión de la comunidad y la distancia entre viviendas.

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    Procedimiento para la evaluación del recurso y diseño de sistemas microeólicos  Open access

     Ferrer Marti, Laia; Pastor Moreno, Rafael; Ranaboldo, Matteo; Capó, Gregori Miquel; Velo Garcia, Enrique
    Encuentro Latinoamericano y del Caribe sobre Pequeños Aprovechamientos Hidroenergéticos
    Presentation's date: 2009-07
    Presentation of work at congresses

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    Los sistemas de electrificación basados en el aprovechamiento de fuentes de energía renovables han demostrado ser adecuados para proveer de electricidad a comunidades aisladas de forma autónoma. En concreto, la electrificación mediante energía eólica es una de las opciones tecnológicas utilizadas recientemente en proyectos implementados en la sierra andina de Perú. Hasta ahora, estos proyectos se han diseñado bajo el concepto de instalaciones individuales en cada punto de consumo. Como alternativa, se propone un diseño que considera la combinación de equipos individuales aislados con la generación y distribución de electricidad mediante una o varias microrredes. La localización de los diferentes tipos de aerogeneradores y el diseño de la(s) microrred(es) se decide considerando el recurso eólico de cada punto y la localización y la demanda de los puntos de consumo. Esta alternativa de diseño incorpora la opción de utilizar equipos de generación de más potencia, proporcionalmente más baratos, y evita condicionar el consumo de una familia al recurso eólico disponible en su domicilio. En este trabajo se presenta un proceso de evaluación de recurso eólico y un modelo matemático de programación lineal entera y mixta para el diseño de sistemas eólicos. El proceso de evaluación de recurso y los resultados del modelo del modelo se validan mediante la aplicación a un caso real implementado en la sierra norte de Perú. Los resultados obtenidos reducen los costes de inversión inicial y utilizan pequeñas microrredes, a pesar de la dispersión de la comunidad y la distancia entre viviendas.

    Postprint (author’s final draft)

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    Optimización del diseño de sistemas microeólicos para la electrificación rural  Open access

     Ferrer Marti, Laia; Pastor Moreno, Rafael; Ranaboldo, Matteo; Capo, Gregori Miquel; Velo Garcia, Enrique
    International Seminar in Optimization and Related Areas
    Presentation's date: 2009-10
    Presentation of work at congresses

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    Los sistemas de electrificación basados en el aprovechamiento de fuentes de energía renovables han demostrado ser adecuados para proveer de electricidad a comunidades aisladas de forma autónoma. En concreto, la electrificación mediante energía eólica es una de las opciones tecnológicas utilizadas recientemente en proyectos implementados en la sierra andina de Perú. Hasta ahora, estos proyectos se han diseñado bajo el concepto de instalaciones individuales en cada punto de consumo. Como alternativa, se propone un diseño que considera la combinación de equipos individuales aislados con la generación y distribución de electricidad mediante una o varias microrredes. La localización de los diferentes tipos de aerogeneradores y el diseño de la(s) microrred(es) se decide considerando el recurso eólico de cada punto y la localización y la demanda de los puntos de consumo. Esta alternativa de diseño incorpora la opción de utilizar equipos de generación de más potencia, proporcionalmente más baratos, y evita condicionar el consumo de una familia al recurso eólico disponible en su domicilio. En este trabajo se presenta un proceso de evaluación de recurso eólico y un modelo matemático de programación lineal entera y mixta para el diseño de sistemas eólicos. El proceso de evaluación de recurso y los resultados del modelo del modelo se validan mediante la aplicación a un caso real implementado en la sierra norte de Perú. Los resultados obtenidos reducen los costes de inversión inicial y utilizan pequeñas microrredes, a pesar de la dispersión de la comunidad y la distancia entre viviendas.

  • Wind resource estimation and sitting of turbines in a village electrification project

     Ferrer Marti, Laia; Pastor Moreno, Rafael; Ranaboldo, Matteo; Capó, Gregori Miquel; Velo Garcia, Enrique
    International Workshop on Small Scale Wind Energy for Developing Countries
    Presentation's date: 2009-09
    Presentation of work at congresses

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    Avaluació de recurs o disseny de sistemes micro-eòlics per a la electrificació rural  Open access

     Ferrer Marti, Laia; Pastor Moreno, Rafael; Ranaboldo, Matteo; Capó Plaza, Gregori Miquel; Velo Garcia, Enrique
    Congrés UPC Sostenible 2015
    Presentation's date: 2009-07
    Presentation of work at congresses

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    Els sistemes d’electrificació basats en l’aprofitament de fonts d’energia renovables disponibles localment, han demostrat ser adequats per a proveir d’electricitat a comunitats aïllades de forma autònoma, i contribuir així a la sostenibilitat de les formes de vida rurals en països en desenvolupament. En concret, l’electrificació mitjançant energia eòlica és una de les opcions tecnològiques emprades recentment en projectes implementats en la serra andina de Perú. Fins ara, aquests projectes s’han dissenyat sota el concepte d’instal·lació d’un micro-aerogenerador individual per a cada punt de consum, especialment per a comunitats amb una dispersió moderada. Tot i haver demostrar la seva idoneïtat, aquest tipus de disseny és millorable des del punt de vista d’augment de la sostenibilitat econòmica, social i ambiental dels projectes d’electrificació amb energia micro-eòlica. Com a alternativa, es proposa un nou concepte de disseny per a comunitats disperses que considera la combinació d’equips individuals aïllats amb la generació i distribució d’electricitat mitjançant una o diverses micro-xarxes de distribució elèctrica. La localització dels diferents tipus d’aerogeneradors i el disseny de la micro-xarxa es decideixen considerant el recurs eòlic de cada punt i la localització i la demanda dels punts de consum. Aquesta alternativa de disseny incorpora l’opció d’utilitzar equips de generació més grans, proporcionalment més barats i de menor impacte ambiental, i evita condicionar el consum d’una família al recurs eòlic disponible a casa seva, augmentant l'impacte i el benefici econòmic i social sobre les persones beneficiaries, al temps que disminueix els requeriments i les despeses de manteniment. En aquest treball es presenta un procés d’avaluació de recurs eòlic i un model matemàtic de programació lineal entera i mixta per al disseny de sistemes eólics amb possiblesmicro-xarxes. El procés d’avaluació de recurs i els resultats del model del model es validen mitjançant l’aplicació a un cas real implementat en la serra nord de Perú. Els resultats obtinguts redueixen els costos d’inversió inicial i utilitzen petites micro-xarxes, tot i la dispersió de la comunitat i la distància entre vivendes.