5 ms·
The facility you linked produces and stores chemical fuel, and can't even convert it back into electricity. The project includes using Mitsubishi M501JAC combi
by philipkglass 4y ago
The facility you linked produces and stores chemical fuel, and can't even convert it back into electricity.
The project includes using Mitsubishi M501JAC combined-cycle gas turbines to turn the hydrogen back into electricity:
https://www.powermag.com/aces-deltas-giant-utah-salt-cavern-hydrogen-storage-project-gets-504m-conditional-doe-loan-guarantee/ https://www.powermag.com/aces-deltas-giant-utah-salt-cavern-...
https://power.mhi.com/products/gasturbines/lineup/m501j https://power.mhi.com/products/gasturbines/lineup/m501j
This turbine has a rated combined-cycle efficiency of 64%.
Production of hydrogen is more than 70% efficient in the best current commercial electrolyzers:
https://www.nrel.gov/docs/fy04osti/36705.pdf https://www.nrel.gov/docs/fy04osti/36705.pdf
Round-trip efficiency is much lower than 80%, but not as low as you have written here.
- pencilguin 4y agoIndustrial-scale electrolysers will soon be well over 90% efficient.
- nomel 4y agoAny terms I can search to understand these advances? I seemed to remember learning that boring old electrolysis was around 30% efficient!
- pencilguin 4y agohttps://www.nature.com/articles/s41467-022-32652-y https://www.nature.com/articles/s41467-022-32652-y Presuming I understood correctly. Another system used a hydrogen-side electrode made of foamed metal immersed in water, where the surface area presented to the water was therefore very large, and the small pore size limited the hydrogen bubbles' interference with contact between water and electrode surface.
- ClumsyPilot 4y agowhy are turbines used in place of potentially more efficient fule cells?
- AstralStorm 4y agoCost. Fuel cells require quality manufactured membranes that also require regular maintenance and replacement. Getting volume with them is also a hard problem.