Solar: Jean Luc Perrier, solar hydrogen production

[Christophe]

And for those who are in the area, you can still go and buy the paper version of the Courrier de l'Ouest du jour:

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[GuyGadeboisTheBack]

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(If someone looks for me, I'm in the garden ..........)

[Christophe]

It's (you're) frankly really bad Guy on this one !!!

A bit of respect !

[gildas]

As a reminder, interview with Mr JL Perrier:

http://hydrogene.onebus.fr/video/jl_perrier_archive.mp4

[Christophe]

Well I did not know this interview!

So thank you Gildas!

I just integrated it on Youtube for better visibility:

[Christophe]

And on Twitter:

[Remundo]

while eminently respecting the works and achievements of Mr PERRIER

I am not very convinced by H2. Difficult to produce, store, distribute, poor performance in a heat engine, and disappointing in a heat pump.

I think we have to turn to fairly short carbon chains of renewable origin.

not too short either because otherwise the products are carbonated.

the first alcohols (methanol, ethanol, propanol) are very interesting in gasoline engines.

we now arrive at thermodynamic efficiencies which flirt with 50% in stationary heat engines.

organic waste is plethora of. You have to crack them and synthesize somewhat standardized things in order to have standardized and reliable fuels.

In short, we need gasoline and diesel of renewable and synthetic origin.

At the same time, do not neglect the hybridization of vehicle fleets, or of the vehicles themselves. Because the internal combustion engine is the worst in town, but the best on the highway, while electric propulsion is the other way around. This is due to the density of their energy source and the ease of recharging the vehicle with energy.

[gildas]

while eminently respecting the works and achievements of Mr PERRIER

I am not very convinced by H2. Difficult to produce, store, distribute, poor performance in a heat engine, and disappointing in a heat pump.
....

Remundo,
There is this very efficient hydrogen engine:

[Remundo]

Thank you for the link

it is an internal combustion engine, original certainly.

when I say that hydrogen does not have a good yield, I am talking above all about the hydrogen SECTOR.

On the way to a sustainable energy future

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going through batteries gives 3 times more final energy than going through H2 for an initial quantity of renewable electricity.

if we go through an internal combustion engine with H2, it is about twice as bad, because the efficiency of an MCI with H2 is about 2% instead of 30% for a heat pump.

Even if the MCI had 50% efficiency (current technological limits), it would be much simpler to directly burn a renewable hydrocarbon and easier to obtain and handle, eg ethanol or a synthetic gasoline.

[Ahmed]

Totally agree! Viewing things in isolation completely mischaracterizes the perspective and only the big picture is relevant.
I am much less so on the slogan at the bottom of your illustration; I would modify it as follows: "People don't need hydrogen. They need motion, but motion give emotions ...".