doogles » Wed Nov 19, 2014 3:26 am wrote:Good day to you Zetrique and Braininvat.
I am totally ignorant of hydrogen-powered cars. What is the brief principle involved> Do they need to be plugged into electricity outlets?
doogles » Thu Nov 20, 2014 4:32 am wrote:Thank you Marshall for that information. It describes the basic principle well.
I must admit that I was a bit lazy last night and had failed to check the link provided by Braininvat. This shows the design of the equipment needed in the car itself very well. I thank you for the link BIV and apologise for my lazy lapse.
It’s obvious that a fuel cell is needed as well as a fuel (hydrogen) tank. And I think this is where we still have some practical problems with hydrogen –driven vehicles. Apparently the fuel cells are still fairly expensive (That may change with numbers), and hydrogen fuel outlets need to be available. Obviously increased usage could result in more outlets.
But the biggest question mark hanging over the technology appears to be in the commercial production of hydrogen gas itself. There was a claim in the link provided by Braininvat that the vehicles using hydrogen cells do not themselves emit greenhouse gases. This is true.
But the current economical methods of collecting and storing hydrogen gas do produce greenhouse gases.
If this is so, then hydrogen-driven vehicles remain expensive at the moment, and the current economic technologies for producing the hydrogen gas still produce greenhouse gases.
Having said that, I might add that to date, to the best of my knowledge and belief, we have not yet seen a basic experiment demonstrating that any of the greenhouse gases actually hold the heat that they absorb for any length of time. I realise that there is evidence that they absorb infrared emissions, but not that they hold that energy for any length of time. Can anyone enlighten me?
doogles » Wed Nov 26, 2014 1:53 pm wrote:Hopefully, this will turn out to be something like the picture for hydrogen propulsion tecnology.
wolfhnd » Fri Jan 30, 2015 3:43 am wrote:Why don't we switch to natural gas on the way to hydrogen?
By storing hydrogen or substitute natural gas in the existing natural gas pipeline network and associated underground storage facilities, the stored energy can be discharged where and when it is needed most. This results in a higher overall integrated system efficiency.
Darby » Fri Feb 27, 2015 9:11 am wrote:The main problems I see with hydrogen fuel cells ATM are two fold:
For the transportation sector: the biggest problem is not so much generation of hydrogen, but rather the infrastructure for safe & economical distribution and utilization, both. You have to grow both at the same time, which is not easy.
"We have developed a compound, Ni5P4 (nickel-5 phosphide-4), that has the potential to replace platinum in two types of electrochemical cells: electrolyzers that make hydrogen by splitting water through hydrogen evolution reaction (HER) powered by electrical energy, and fuel cells that make electricity from combining hydrogen and oxygen," said Rutgers Chemistry Professor Charles Dismukes.
zetreque » March 20th, 2015, 10:18 am wrote:Solving the storage and expensive metal (platinum) problem.
Proton OnSite will take part in what officials at the company are saying is the first large-scale project to use electricity from renewable sources to make carbon-free hydrogen gas to be stored for producing power at a later time.
Proton has launched a new commercial-scale megawatt electrolyzer that the company says provides an increase in hydrogen production that is 13 times greater than compared to similar commercial systems.
Dave_C » Sat Apr 18, 2015 7:20 am wrote:Great thread zetreque. I work in the fuel cell industry. Actually work for one of the companies you've mentioned, but there's a lot of info here I haven't been aware of. I guess my focus is more in the engineering area though so I don't see as much about the market.
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