Abstract:40969 November 19, 1996
Mechanical Technology, Inc.
Proton exchange membrane fuel cells generate electricity by using relatively clean hydrogen gas as a fuel. For on-site cogeneration, however, the fuel of choice is… more
Abstract:40826 November 13, 1996
NexTech Materials, Ltd.
Although oxygen-conducting ceramics are used as electrolytes in solid oxide fuel cells (SOFCs), their requirements for high temperature operation cause material… more
Abstract:1. A conceptual baseline design of a hydrogen supply system with a on/off capability will be prepared for delivering hydrogen in increments of up to 10g/hour with a total capacity of 120g hydrogen. This baseline design will be based upon a solid state hydrogen reactant mixture with a yield of 8% by… more
Abstract:…. At a projected maximum rotation speed of 58,000 rpm, a 29.5 pound FWUPS module provides 15 minutes of energy at an output power level of 2Kw. This assumes the FWUPS spins down from full speed to half speed during discharge. A flywheel is superior to batteries or fuel … more
Abstract:The proposed research examines the feasibility of using solid oxide fuel cell (SOFC) for shipboard electric power generation by substituting new ceramic anode materials able to operate with logistic fuels. These anodes would allow the SOFC to operate witha… more
Abstract:Fuel cells promise unique siting characteristics and operating benefits which can help extend or increase the availability of electrical power in rural communities. Some of these advantages include: availability in small sizes, modularity, fuel efficiency,… more
Abstract:THE OBJECT IS THE DEVELOPMENT OF A MINIATURE HYDROGEN GENERATOR FOR SMALL PROTON EXCHANGE MEMBRANE (PEM) FUEL CELLS. ENERGY DENSITY OF THIS RECHARGEABLE POWER SOURCE IS 6 TO 8 TIMES HIGHER THAN THAT OF RECHARGEABLE BATTERIES. THE HYDROGEN GENERATOR IS THE KEY… more
Abstract:The proton exchange membrane (PEM) fuel cell is being considered as power source for a variety of applications (1-4). Gravimetric and volumetric energy density, life cycle costs, ease and safety of operation are major considerations which may favor a PEM… more
Abstract:The need for environmentally clean sources of energy for vehicular propulsion is driving a worldwide effort to develop high energy density "supercapacitors". These electronic devices are expected to work in tandem with advanced batteries or fuel cells to… more
Abstract:The U.S. Army requires lightweight man-portable power supplies delivering approximately 300 W and weighing less than 5 kG. In this context we propose to develop a polymer electrolyte membrane hydrogen fuel cell with an ultra lightweight cell stack which can… more
Abstract:Proton exchange membrane fuel cells have gained much importance for providing electric power for vehicles and other portable powerplants due to their demonstrated excellent power density and fuel economies. They are particularly suited for man-portable… more
Abstract:Presently available technology for converting logistic fuels to hydrogen for use in fuel cells is unsatisfactory in three fundamental ways. First there is the problem that the hydrogen that is produced in the initial fuel gasification step contains impurities… more
Abstract:… achieve gravimetric energy density of 2.5Wh/kg and volumetric energy density of 2500 kWh/M(3), while also having good hydrogen sorption kinetics, long cycle life, resistance to poisoning and low cost. Such a H-storage system will make the PEM and other types of fuel … more
Abstract:Proton exchange membrane (PEM) fuel cells provide significant advantages over conventional power systems. They operate at very high efficiencies (greater than 50% direct conversion and at system efficiencies which can exceed 40%), generate no emissions, are… more
Abstract:CARBONATE FUEL CELL POWER PLANTS OFFER THE MOST EFFICIENT AND ENVIRONMENTALLY SUPERIOR OPTION TO GENERATE ELECTRICITY FROM NATURAL GAS, COAL GAS, AND OTHER HYDROCARBON FUELS. TO REALIZE THE GREATEST COMMERCIAL POTENTIAL OF THESE POWER PLANTS, ADVANCES ARE… more
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