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Fuel Cell Design

Fuel Cell Design. ENCH 340 Spring, 2005 UTC. Technical and Economic Aspects of a 25 kW Fuel Cell. Chris Boudreaux Jim Henry, P.E. Wayne Johnson Nick Reinhardt. Technical and Economic Aspects of a 25 kW Fuel Cell. Chemical and Thermodynamic Aspects. Investigate the design of

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Fuel Cell Design

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  1. Fuel Cell Design ENCH 340 Spring, 2005 UTC

  2. Technical and EconomicAspects of a 25 kW Fuel Cell Chris Boudreaux Jim Henry, P.E. Wayne Johnson Nick Reinhardt

  3. Technical and EconomicAspects of a 25 kW Fuel Cell • Chemical and Thermodynamic Aspects Investigate the design of --a 25 kW Fuel Cell --Coproduce Hydrogen --Grid parallel --Solid Oxide Electrolyte Our Capabilities

  4. Outline Introduction to the project Flowsheet Development Equipment Design Economics

  5. Introduction Overall Reaction Methane + Air --> Electricity + Hydrogen + Heat

  6. Introduction Gas Reformer Air SynGas Electricity Fuel Cell Heat POC Pressure Swing Absorption Hydrogen

  7. Fuel Cell-Chemistry SynGas POC H2 + CO H2 H2O CO2 CO O+ O+ “Air” Air O2 N2 Solid Oxide Electrolyte Is porous to O+

  8. Fuel Cell-Electricity SynGas POC H2 H2O CO2 CO Load O+ O+ “Air” Air O2 N2 Electrons

  9. Fuel Cell-Challenges SynGas POC H2 Hot SynGas + CO H2 H2O CO2 CO Recover H2 O+ O+ “Air” Air O2 N2 Hot Air Recover Heat

  10. Flowsheet Development

  11. Equipment Design

  12. Economics

  13. Heat Fuel Cell . Objective Develop and demonstrate a 25 kW, grid parallel, solid oxide fuel cell system that coproduces hydrogen. , the installation be configured to simultaneously and efficiently produce hydrogen from a commercial natural gas feedstream in addition to electricity. This ability to produce both hydrogen and electricity at the point of use provides an early and economical pathway to hydrogen production. . Ceramic processing and challenges in the design and manufacturing process of SOFCs will be addressed . The amount of hydrogen that the unit produces may be controlled by the adjusting the natural gas flow at steady power production (i.e., adjusting the fuel utilization). A nominal production rate of 25 kg of hydrogen per day falls within the expected upper and lower utilization limits for 25 kW electricity production. The system produces a hydrogen-rich exhaust stream that will be purified using a Pressure Swing Absorption (PSA) unit. The hydrogen flow and purity are interdependent. It is expected that purity >98% is achievable for flows of 2-3 kg/day. Critical impurities, such as CO and CO2 will be measured. It is not clear that this size system makes sense for commercial production. We are looking at a 25 kW module as a building block for commercial production to begin in 2006. The size of the 25 kW module is estimated to be smaller than a 5 ft cube. The cost of early commercial systems is expected to be <$10K/kW

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