[vdblnkr34 (OP)]

Is it possible to burn 2kg of hydrogen per hour or it is a lot to deal with?

[alancalverd]

Rockets burn more than 2 kg per second, cars burn around 2 kg per hour. No problem.

[Bored chemist]

https://en.wikipedia.org/wiki/Fuel_cell

It is only 40% to 60% efficiency.

So, let's compare it against a gas fired  power station.
https://www.statista.com/statistics/548943/thermal-efficiency-gas-turbine-stations-uk/

OK about 48%
Pretty similar.

And then we can look at the whole quote from the wiki page, - including the bit you missed out.

"The energy efficiency of a fuel cell is generally between 40 and 60%; however, if waste heat is captured in a cogeneration scheme, efficiencies of up to 85% can be obtained."

[vdblnkr34 (OP)]

Yes, and the cost to do that is probably high. Probably it needs chemicals to run. How much to build a 1kw/h fuel cell generator?

[Bored chemist]

Yes, and the cost to do that is probably high. Probably it needs chemicals to run.

Just like a conventional gas turbine then.

[Bored chemist]

How much to build a 1kw/h fuel cell generator?

What does "1kw/h"
Mean?

[vdblnkr34 (OP)]

1kw per hour. speed

[vdblnkr34 (OP)]

what chemicals used for fuel cell?

[Bored chemist]

1kw per hour

Do you mean 1 kw hour or 1 kw?
It really would be better if you stopped and learned some science.

[Bored chemist]

what chemicals used for fuel cell?

It depends.
https://en.wikipedia.org/wiki/Fuel_cell

[vdblnkr34 (OP)]

They are pretty expensive. 150Kw setup is around $80k to a $100k.

For $200k you can get good 500kw setup with a steam power station.

[alancalverd]

You still haven't addressed the fundamental problem of the energy required to extract hydrogen from its stable compounds. The greenest method (possibly the only zero-carbon method) is by electrolysis of water, so you start with electricity, lose some energy in the electrolytic cell, lose some hydrogen in transmission and storage, lose more energy in combustion and heating water to make steam, and lose more energy in converting the steam power to electricity.

All you have devised is a method for wasting electricity.

There is value in storing and distributing electrolytic hydrogen for direct conversion into heat,  motive power  (internal combustion or gas turbine) or electricity (by fuel cell)  wherever needed. This at least addresses the storage problem of renewable power sources, with maximum utility of the product, and minimum energy losses, using existing technologies.     

[vdblnkr34 (OP)]

Yes, true. But the price I gave power losses calculated. That's the powers you will get for those prices.


Generation of hydrogen oxygen from water not cheap. Need something like platinum or gold plated material. But its very easy. No storage, all will go into a torch gun. Oxyhydrogen is better.

Generation of oxyhydrogen will be free of electrical cost. Used by dynamo machines. I came up with a nice high current generation setup.

[vdblnkr34 (OP)]

Does low carbon stainless steel react with hydrogen and oxygen?

[alancalverd]

Generation of oxyhydrogen will be free of electrical cost.

Tell us more! The only stable form of oxyhydrogen is water, but it doesn't burn because the hydrogen is already fully oxidised.

[Bored chemist]

Generation of oxyhydrogen will be free of electrical cost.

If that's true, you just saved the wold.
Unfortunately, there's a mathematical proof that you are wrong.

A hundred years ago someone proved that your idea is impossible.
It is a mathematical proof. It does not depend on the details of your claim.

Do you understand that?

[evan_au]

Does low carbon stainless steel react with hydrogen and oxygen?

Not if they are all cold (eg room temperature or below).
But as soon as you ignite the mixture, it gets very hot...

Fortunately, hydrogen and oxygen react very well with each other.

[alancalverd]

No storage, all will go into a torch gun. Oxyhydrogen is better.

This equipment is readily available and used for welding - particularly favored by divers because it doesn't produce any smoke or toxic fumes so can be used inside or outside a diving bell. I did post a link to one supplier but I guess it was removed as "commercial".   

[vdblnkr34 (OP)]

Generation of oxyhydrogen will be free of electrical cost.

Tell us more! The only stable form of oxyhydrogen is water, but it doesn't burn because the hydrogen is already fully oxidised. And there is crap load of stuff mixed in water, which need to take into consideration.

I download the book. Electrolysis of water. Written in 196x by engineers. I think why did they separate fuel cell from hydrogen generator. If to combine generation and electrolysis of hydrogen together in one cell, that would be easier. The book says processes speed up under high pressure. And it is better to do that all in a cold water, below 0 would be great. and blah blah blah... 

[chiralSPO]

please, for the love of all that is good, put some of your effort and attention into *learning* about thermodynamics before posting more about this subject