dc.contributor.author | Solberg, Simon Birger Byremo | |
dc.contributor.author | Zimmermann, Pauline | |
dc.contributor.author | Wilhelmsen, Øivind | |
dc.contributor.author | Lamb, Jacob Joseph | |
dc.contributor.author | Bock, Robert | |
dc.contributor.author | Burheim, Odne Stokke | |
dc.date.accessioned | 2022-12-07T13:05:08Z | |
dc.date.available | 2022-12-07T13:05:08Z | |
dc.date.created | 2022-09-06T09:45:45Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 1996-1073 | |
dc.identifier.uri | https://hdl.handle.net/11250/3036373 | |
dc.description.abstract | The 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.iso | eng | en_US |
dc.publisher | MDPI | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Heat to Hydrogen by Reverse Electrodialysis—Using a Non-Equilibrium Thermodynamics Model to Evaluate Hydrogen Production Concepts Utilising Waste Heat | en_US |
dc.title.alternative | Heat to Hydrogen by Reverse Electrodialysis—Using a Non-Equilibrium Thermodynamics Model to Evaluate Hydrogen Production Concepts Utilising Waste Heat | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.volume | 15 | en_US |
dc.source.journal | Energies | en_US |
dc.source.issue | 16 | en_US |
dc.identifier.doi | https://doi.org/10.3390/en15166011 | |
dc.identifier.cristin | 2049100 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |