Computational Fluid Dynamics Model of a Planar Solid-Oxide Electrolysis Cell for Hydrogen Production from Nuclear Energy

Hawkes, Grant L.; O’Brien, James E.; Stoots, C. M.; Herring, J. Stephen; Shahnam, Mehrdad

doi:10.13182/nt07-a3831

Cited by 30 publications

(19 citation statements)

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“…Figure 7 shows the calculated mean electrolyte temperature as a function of operating potential. At a temperature of 1173K, the TNV for CO 2 electrolysis is calculated to be about 1.463V, with the method developed by Hawkes et al [26]. Theoretically, the endothermic heat sink and the ohmic heat generation should be balanced at the TNV and the mean electrolyte temperature should be the same as the inlet gas temperature.…”

Section: Discussion On the Thermal Neutral Voltage (Tnv) Of Soecmentioning

confidence: 99%

Modeling of a solid oxide electrolysis cell for carbon dioxide electrolysis

2010

Chemical Engineering Journal

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In this study, 2 models are developed to investigate the performance of a solid oxide electrolysis cell (SOEC) for CO 2 electrolysis at different levels. The first model is a one-dimensional model which is basing on a previously developed electrochemical model for steam electrolysis and considered all overpotentials in the SOEC. The second model is a two-dimensional thermal-fluid model consisting of the 1D model and a computational fluid dynamics (CFD) model. It is found that the mean electrolyte temperature initially decreases with increasing operating potential, reaches the minimum at about 1.1V and increases considerably with a further increase in potential. At the thermal-neutral voltage (1.463V at 1173K), the calculated mean electrolyte temperature matches the inlet gas temperature. Increasing the operating potential increases both the local current density and the electrolyte Nernst potential. The electrochemical performance can be improved by increasing the inlet gas velocity from 0.2ms -1 to 1.0ms -1 but further increasing the inlet gas velocity will not considerably enhance the SOEC performance. It is also found that a change of electrode permeability in the order of 10 -16 -10 -13 m 2 does not noticeably influence the SOEC performance in the present study, due to negligible convection effect in the porous electrodes.

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Section: Discussion On the Thermal Neutral Voltage (Tnv) Of Soecmentioning

confidence: 99%

Modeling of a solid oxide electrolysis cell for carbon dioxide electrolysis

2010

Chemical Engineering Journal

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“…Complete details of the FLUENT electrolysis stack model are provided in [38]. A condensed description is presented here.…”

Section: Numerical Modelmentioning

confidence: 99%

High Temperature Electrolysis for Hydrogen Production from Nuclear Energy ? TechnologySummary

O’Brien¹,

Stoots²,

Herring³

et al. 2010

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The Department of Energy, Office of Nuclear Energy, has requested that a Hydrogen Technology Down-Selection be performed to identify the hydrogen production technology that has the best potential for timely commercial demonstration and for ultimate deployment with the Next Generation Nuclear Plant (NGNP). An Independent Review Team (IRT) has been assembled to execute the down-selection. This report has been prepared to provide the members of the Independent Review Team with detailed background information on the High Temperature Electrolysis (HTE) process, hardware, and state of the art. The Idaho National Laboratory has been serving as the lead lab for HTE research and development under the Nuclear Hydrogen Initiative. The INL HTE program has included small-scale experiments, detailed computational modeling, system modeling, and technology demonstration. Aspects of all of these activities are included in this report. In terms of technology demonstration, the INL successfully completed a 1000-hour test of the HTE Integrated Laboratory Scale (ILS) technology demonstration experiment during the fall of 2008. The HTE ILS achieved a hydrogen production rate in excess of 5.7 Nm 3 /hr, with a power consumption of 18 kW. This hydrogen production rate is far larger than has been demonstrated by any of the thermochemical or hybrid processes to date.This report was prepared in April-May 2009 specifically for the IRT, which at the end of its evaluation in July 2009, recommended that:DOE-NE should focus on the continued development of HTSE [High Temperature Steam Electrolysis] as the leading candidate for integration with NGNP in 2021. This conclusion is based upon the IRT judgment that HTSE has the highest probability of meeting the down-selection criteria described in the report, including efficient production of hydrogen at NGNP conditions.

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“…Complete details of a FLUENT electrolysis stack model developed at INL for analysis of a planar stack configuration are provided in [53]. The numerical model developed for this analysis was based on the geometry of a single solid-oxide electrolysis cell (SOEC) taken from a planar stack similar to the stack described in detail in [43].…”

Section: Numerical Model Of a Planar Soec Stackmentioning

confidence: 99%

Large Scale Hydrogen Production From Nuclear Energy Using High Temperature Electrolysis

O’Brien

2010

2010 14th International Heat Transfer Conference, Volume 8

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Hydrogen can be produced from water splitting with relatively high efficiency using high-temperature electrolysis. This technology makes use of solid-oxide cells, running in the electrolysis mode to produce hydrogen from steam, while consuming electricity and high-temperature process heat. When coupled to an advanced high temperature nuclear reactor, the overall thermal-to-hydrogen efficiency for high-temperature electrolysis can be as high as 50%, which is about double the overall efficiency of conventional low-temperature electrolysis.

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Computational Fluid Dynamics Model of a Planar Solid-Oxide Electrolysis Cell for Hydrogen Production from Nuclear Energy

Cited by 30 publications

References 0 publications

Modeling of a solid oxide electrolysis cell for carbon dioxide electrolysis

Modeling of a solid oxide electrolysis cell for carbon dioxide electrolysis

High Temperature Electrolysis for Hydrogen Production from Nuclear Energy ? TechnologySummary

Large Scale Hydrogen Production From Nuclear Energy Using High Temperature Electrolysis

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