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- W2149043404 abstract "High-temperature electrolysis (HTE) of steam holds the promise of efficient large-scale hydrogen production that does not require consumption of fossil fuels and, if based on nuclear energy or renewables, does not produce greenhouse gases. This technology is based on the use of solid-oxide electrolysis cells derived from solid-oxide fuel cells. A 15 kW integrated laboratory scale (ILS), HTE facility has been developed for research and technology demonstration. Initial operation of this facility resulted in over 400 hours of operation with an average hydrogen production rate of approximately 0.9 Nm 3 /hr. The ILS facility is designed to address large-scale issues such as thermal management (feed-stock heating, high-temperature gas handling, heat recuperation), multiple-stack hot-zone design and manifolding, multiple-stack electrical configurations, hydrogen recycle, and other “integral” issues. A parallel system-analysis activity is also under way in which a reference process model of a commercial-scale high-temperature electrolysis plant for hydrogen production has been developed. The reference plant design is driven by a 600 megawatt thermal high-temperature helium-cooled reactor coupled to a direct Brayton power cycle. The overall system thermal-to-hydrogen production efficiency (based on the low heating value of the produced hydrogen) is 47.1% at a hydrogen production rate of 2.36 kg/s with the high-temperature helium-cooled reactor concept. This paper documents the initial operation of the ILS, with experimental details about heat-up, initial stack performance, as well as long-term operation and stack degradation. The paper will also present the optimized design for the reference nuclear-driven HTE hydrogen production plant which may be compared with other hydrogen production methods and power cycles to evaluate relative performance characteristics and plant economics." @default.
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- W2149043404 date "2008-07-01" @default.
- W2149043404 modified "2023-09-27" @default.
- W2149043404 title "Demonstration and System Analysis of High Temperature Steam Electrolysis for Large-Scale Hydrogen Production Using SOFCs" @default.
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