Post by
retiredengexec on Dec 20, 2020 4:43pm
Some Practical Aspects of H2
1. Using electrolisis AKA green hydrogen, more energy is used to produce it than it delivers. 55 Kwhr vs. 33 Kwhr. 2. Assuming a cost of $0.11 per Kwhr the cost for a small distributed H2 gas station which can service 500 cars and uses 11.7 MW is about 25 million dollars with a plus or minus 30 capital cost. The price is about $8.00 per kg or around 9 dollars us a gallon not including taxes. The cost per mcf is about 40 bucks roughly 12 times natgas. I assume a power cost of 11 cents per kwh which I'd what I pay in the west Kootenays. I wont even start on safety.
Comment by
Quintessential1 on Dec 20, 2020 5:28pm
https://www.theguardian.com/environment/2020/oct/03/green-hydrogen-from-renewables-could-become-cheapest-transformative-fuel-within-a-decade#:~:text=Green%20hydrogen%20is%20created%20by,known%20as%20steam%2Dmethane%20reforming.
Comment by
retiredengexec on Dec 20, 2020 6:12pm
Not possible to swap out natural gas One kg of h2 has energy of 193,000 btus. So it takes 5 kg of h2 to equal one mcf of gas. Electrolysis processes may become a bit more efficient but physics is physics. Steam reformation means heating in a vessel over a catalyst bed to 800 degrees. I'll look into it. Bottomline Evs are cheaper than h2 with fuel cells.
Comment by
retiredengexec on Dec 20, 2020 6:27pm
I read the article and there quoted prices around 2 bucks a kg would imply almost free electricity, very low capital and no operating costs. The article doesn't back up the numbers of course that would be too much.
Comment by
Quintessential1 on Dec 20, 2020 8:16pm
" Evs are cheaper than h2 with fuel cells." Gasoline engines are cheaper than both. That's not the point.
Comment by
retiredengexec on Dec 20, 2020 8:26pm
Actually it is the point. EVs and h2 vehicles have to be cost effective for a family making 75 k a year. The so called middle class. My next vehicle if I live that long will because hybrid or Ev.
Comment by
Quintessential1 on Dec 20, 2020 8:48pm
Really. Why not a NG vehicle? Nobody is talking about putting NG into vehicles and they are talking about replacing NG with H2. It doesn't have to work in vehicles.
Comment by
Chad123 on Dec 21, 2020 7:16am
We already went through that phase in the late 80's and early 90's with propane. Nat gas vehicles will suck the big enchilada just like propane.....
Comment by
Quintessential1 on Dec 21, 2020 8:50am
We already went through that phase in the late 80's and early 90's with propane. Nat gas vehicles will suck the big enchilada just like propane.....[/quote]