Effect of voltage elevation on cost and energy efficiency of power electronics in water electrolyzers

Hysa, Galdi; Ruuskanen, Vesa; Kosonen, Antti; Niemelä, Markku; Aarniovuori, Lassi; Guilbert, Damien; Ahola, Jero

doi:10.1016/j.jpowsour.2023.233108

Cited by 14 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…What is often neglected in academic TEA studies is the fact that the rectifiers and power electronics are designed to function within specific voltage limits. 58 A significant voltage increase beyond this range can induce various technical challenges, including reduced system efficiency, increased wear and tear on equipment, and potential safety risks. 59 To avoid these issues, the electrolyzer stack in Meeting together the three conditions of economic viability, CO 2 footprint decrease, and large market size predicts the great promise of electrochemical CO 2 -to-CO conversion.…”

Section: ■ Technoeconomic Comparisonmentioning

confidence: 99%

“…This system produces hydrogen at 56 kWh/kgH 2 with an estimated degradation rate of 2.6 μV/hour. , Due to degradation, the stacks need to be replaced over the lifetime of the system. , For each configuration and for both water and CO 2 electrolyzers, the optimum number of stack replacements was calculated to minimize the cost (see the Supporting Information). What is often neglected in academic TEA studies is the fact that the rectifiers and power electronics are designed to function within specific voltage limits . A significant voltage increase beyond this range can induce various technical challenges, including reduced system efficiency, increased wear and tear on equipment, and potential safety risks .…”

Section: Technoeconomic Comparisonmentioning

confidence: 99%

See 1 more Smart Citation

Renewable Syngas Generation via Low-Temperature Electrolysis: Opportunities and Challenges

Raya-Imbernón,

Samu,

Barwe

et al. 2023

ACS Energy Lett.

View full text Add to dashboard Cite

The production of syngas (i.e., a mixture of CO and H 2 ) via the electrochemical reduction of CO 2 and water can contribute to the green transition of various industrial sectors.Here we provide a joint academic−industrial perspective on the key technical and economical differences of the concurrent (i.e., CO and H 2 are generated in the same electrolyzer cell) and separated (i.e., CO and H 2 are electrogenerated in different electrolyzers) production of syngas. Using a combination of literature analysis, experimental data, and techno-economic analysis, we demonstrate that the production of synthesis gas is notably less expensive if we operate a CO 2 electrolyzer in a COselective mode and combine it with a separate PEM electrolyzer for H 2 generation. We also conclude that by the further decrease of the cost of renewable electricity and the increase of CO 2 emission taxes, such prepared renewable syngas will become cost competitive.

show abstract

Section: ■ Technoeconomic Comparisonmentioning

confidence: 99%