Formulación y evaluación de la factibilidad para la producción y comercialización de maletines y bolsos hechos en material reciclable en la localidad dos (chapinero), de Bogotá

En este trabajo mostramos la investigación realizada en la ciudad de Bogotá, en el sector de Chapinero localidad dos. Esto con el fin de conocer la factibilidad de producir y comercializar maletines y bolsos en material reciclable (periódico, revistas y envolturas de dulces, etc.), en donde llevamos a cabo los respectivos estudios que permitieron realizar el análisis de las diferentes variables que intervienen en el proceso, como los hábitos de compra, los precios, el ingreso salarial y el estilo de vida de las personas y sus gustos. Adicionalmente, los costos de materias primas, insumos, maquinaria, mano de obra y arrendamientos, que se configuran como aspectos relevantes para emprender un proyecto como este. De un tema relacionado con la contribución del individuo en busca de mejorar el medio ambiente, son muchas las actividades que deben proponer para concienciar a las personas a contribuir en este mismo fin. Para ello, empleamos métodos de recolección de información, como encuestas y focus group obteniendo un punto de referencia en el momento de establecer hipótesis, planes de acción, proyecciones de compra, de producción y venta, etc

Projet DIAPASON 2

National audienceProjet DIAPASON

Encyclopedia of Electrical and Electronic Power Engineering

International audienceFuel Cell cars are a strategic part of research and development in the automotive industry, due to their high environmental compatibility and their high efficiency. Proton Exchange Membranes (PEM) are the most promising fuel cell technologies for transportation applications. PEM Fuel Cells are widely used for other applications either in industry or residential. Independently of the problems of integration and cost, the use of PEM Fuel Cell (PEMFC) in a vehicle requires to fully control its behavior and also all its ancillaries. Indeed, the power efficiency of the PEMFC system does not only depend on the stack but also on the response of the ancillaries that are located around the stack. In order to run the fuel cell in good conditions and to increase the lifetime of the fuel cell system, the whole control has to be carefully operated. In this article, a fuel cell system is described with its local and global controls. Diagnosis methods for fuel cell system are also presented

Accelerated stress tests for proton exchange membrane fuel cells: A state-of-art

International audienceTwo major issues are still to be solved in research on fuel cell systems: reducing the costs and increasing the durability. To do this, three main topics have to be addressed: material & design, assembly, and optimization of the stack’s operation inside a system. In order to improve the lifetime and the durability of fuel cell systems, some long and expensive ageing tests are performed to study the behavior of the fuel cell with the aim of making it resistant to permanent change over time. In that case, the accelerated stress tests are a key solution to ageing testing with reasonable time and testing costs. A state-of-the-art of the accelerated stress tests dedicated to PEMFC is proposed in this paper

Supervised classification approach dedicated to proton exchange membrane fuel cell diagnostic

International audienceThis paper deals with a supervised classification approach dedicated to diagnose a PEMFC system. The purpose is to detect and isolate a fault occurring on a fuel cell system based on electrochemical impedance measurements.The air compressor failure, fuel poisoning and stack overheating are the faults considered in this study. Someexperimental tests are performed on two similar stacks (only the power changes). The k-nearest neighbors is the supervised classification method that is used as it is well known for its efficiency and simplicity of implementation