Скачать с ютуб Classification criteria | 8/14 | UPV в хорошем качестве

Classification criteria | 8/14 | UPV

Título: Classification criteria Descripción automática: In this video, the presenter discusses the technological applications of fuel cells, emphasizing their efficiency in converting chemical energy into electrical energy. Fuel cells are electrochemical devices that allow for high efficiency and yield, especially when compared to traditional operations. However, when scaling up for use in power plants, multiple fuel cells must be associated into stacks and connected in series or parallel to increase voltage and power density to meet higher energy demands. The video explores the various operations needed before and after the fuel cell process, including fuel processing and energy management. A variety of fuels, such as natural gas, methanol, and particularly hydrogen (which requires additional processing to achieve a rich hydrogen stream), can be supplied to fuel cells. The presenter explains the importance of fuel pretreatment to remove impurities that could poison the catalysts and electrolytes. High-temperature fuel cells can tolerate higher levels of impurities, while low-temperature fuel cells require purer hydrogen streams. Reforming is highlighted as a critical pretreatment operation, particularly steam reforming, which uses a water stream to produce hydrogen from hydrocarbons. Reforming can be external or internal (within the fuel cell) and requires high temperatures for endothermic reactions. Besides pretreatment, the presenter notes the need for post-treatment operations, such as converting the direct current produced by fuel cells into alternating current for transportation and storage. The video concludes with a look at flow diagrams of power plants using fuel cells, showing that the selection of pretreatment and post-treatment operations depends on the type of fuel cell used. Overall, the efficiency of a fuel cell power plant is contingent on both the performance of the fuel cells and the effectiveness of the associated treatment operations that prepare inputs and manage outputs. The presenter emphasizes the comprehensive approach required for efficient power generation at a large scale using fuel cells. Autor/a: PoliMedia Administrador Curso: Este vídeo es el 8/14 del curso Introduction to Fuel Cells Course | Universitat Politècnica de València (UPV).    • Introduction to Fuel Cells Course | U...   Universitat Politècnica de València UPV: https://www.upv.es Más vídeos en:    / valenciaupv   Accede a nuestros MOOC: https://upvx.es #pilas #de #combustible #fuel #cells #hidrógeno #hydrogen #energy #efficiency #eficiencia #energética #termodinámica #electroquímica #electrochemistry #fuel #cells #