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Hydrogen Fuel Cells Go Flying
https://www.avweb.com/videos/Hydroge...-230883-1.html
Hydrogen Fuel Cells Go Flying By Paul Bertorelli | May 25, 2018 While drone makers and would-be electric aircraft manufacturers are waiting for better batteries, hydrogen fuel cells are rapidly becoming a reality. In this news feature shot at the AUVSI Xponential in Denver, AVweb took a look at some of these technologies. Video: https://www.avweb.com/videos/Hydroge...-230883-1.html https://youtu.be/u9DaHIecIc4 The Players: Intelligent Energy: http://www.intelligent-energy.com/ http://www.intelligent-energy.com/ne...l-cell-stacks/ Airbus wins German Aviation Innovation Award featuring Intelligent Energy Fuel Cell Stacks: The team of developers at Airbus Systems Engineering have stated that running a motor on electric power from fuel cells is more efficient than a kerosene-based drive. The novel turbine has an efficiency of roughly 50 per cent compared to 20 per cent or so achieved with the conventional APU. Ballard/Protonex: https://protonex.com/ https://protonex.com/technology/prot...hange-membrane Proton exchange membrane (PEM) fuel cells operate at relatively low temperatures (80ºC or 175ºF), offer quick start-up times, and require only hydrogen and oxygen to operate. Protonex’ patented design and manufacturing processes for PEM systems provide significant technical and cost advantages compared to competing solutions. he core of a fuel cell system is the fuel cell stack. A Protonex fuel cell stack consists of two primary components: 1) the bipolar plate (cathode and anode), and 2) the membrane electrode assembly (MEA). A single cell of the fuel cell stack is created by stacking a cathode bipolar plate on top of a MEA on top of an anode bipolar plate as shown in Figure 1; this stack up is repeated as necessary to adjust the electrical output characteristics of the fuel cell. The MEA consists of two porous, catalyst-coated electrodes (cathode and anode) that are layered upon either side of an electrolytic membrane. The bipolar plates are electrically conductive and facilitate the supply of oxygen (cathode) and hydrogen (anode) to the MEA via integral flow passages. As shown in Figure 1, on the anode side of the cell, platinum catalyst within the MEA’s electrode layer separates the hydrogen’s negatively charged electrons from positively charged ions (protons). The protons move through the membrane to toward the cathode. The electrons from the anode side cannot pass through the membrane and as a result are forced around the membrane through an external electrical load before returning to the cathode side of the cell; the resultant flow of electrons is a useful electrical current. At the cathode side of the cell, the catalyst within the MEA’s electrode layer facilitates the re-combination of the protons and electrons along with supplied oxygen to produce water and heat. |
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