can anyone help me with real price of electrolysers ((big size)) and hydrogen storage 700 bar (per kg ) or total cost and finally compressor cost and if could with its sources, and also i want to know the commercial price of hydrogen as a fuel nowadays?
many thanks in advance
I assume you want to use the hydrogen as an energy store? If so, is it for fixed or mobile use? If fixed, then I don't recommend it as it's not very efficient. Water isn't easy to electrolyse - it has too high an overvoltage. Will you recover or exhaust the oxygen you get? If you exhaust to air, use a fuel cell to recover the energy, then you will have an overall efficiency of about 75% (electrolyser) x 90%(compressor energy) x 55% (Fuel cell) which is 37%. The alternative is to use something much easier to electrolyse than water like nickel oxyhydroxide, which results in the nickel-hydrogen battery - these are the most reliable batteries known and regularly used in spacecraft. What sort of overall use do you wish to put your system to?
Thanks Tony , I want to know the prices from trust sources and in recent years
Abdulla, I think you will have to do a web search on the items you want and try and get quotes. I don't think electrolysers will be that expensive but fuel cells (if you can get them at all) will be extremely expensive. Hydrogen compressors will be fairly expensive, hydrogen tanks not expensive. To get up to date figures you will have to web search and ask for quotes.
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