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dc.contributor.authorSolberg, Simon Birger Byremo
dc.contributor.authorZimmermann, Pauline
dc.contributor.authorWilhelmsen, Øivind
dc.contributor.authorLamb, Jacob Joseph
dc.contributor.authorBock, Robert
dc.contributor.authorBurheim, Odne Stokke
dc.date.accessioned2022-12-07T13:05:08Z
dc.date.available2022-12-07T13:05:08Z
dc.date.created2022-09-06T09:45:45Z
dc.date.issued2022
dc.identifier.issn1996-1073
dc.identifier.urihttps://hdl.handle.net/11250/3036373
dc.description.abstractThe reverse electrodialysis heat engine (REDHE) is a promising salinity gradient energy technology, capable of producing hydrogen with an input of waste heat at temperatures below 100 °C. A salinity gradient drives water electrolysis in the reverse electrodialysis (RED) cell, and spent solutions are regenerated using waste heat in a precipitation or evaporation unit. This work presents a non-equilibrium thermodynamics model for the RED cell, and the hydrogen production is investigated for KCl/water solutions. The results show that the evaporation concept requires 40 times less waste heat and produces three times more hydrogen than the precipitation concept. With commercial evaporation technology, a system efficiency of 2% is obtained, with a hydrogen production rate of 0.38 gH2 m−2h−1 and a waste heat requirement of 1.7 kWh g−1H2. The water transference coefficient and the salt diffusion coefficient are identified as membrane properties with a large negative impact on hydrogen production and system efficiency. Each unit of the water transference coefficient in the range tw=[0–10] causes a −7 mV decrease in unit cell electric potential, and a −0.3% decrease in system efficiency. Increasing the membrane salt diffusion coefficient from 10−12 to 10−11 leads to the system efficiency decreasing from 2% to 0.6%.en_US
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleHeat to Hydrogen by Reverse Electrodialysis—Using a Non-Equilibrium Thermodynamics Model to Evaluate Hydrogen Production Concepts Utilising Waste Heaten_US
dc.title.alternativeHeat to Hydrogen by Reverse Electrodialysis—Using a Non-Equilibrium Thermodynamics Model to Evaluate Hydrogen Production Concepts Utilising Waste Heaten_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.volume15en_US
dc.source.journalEnergiesen_US
dc.source.issue16en_US
dc.identifier.doihttps://doi.org/10.3390/en15166011
dc.identifier.cristin2049100
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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