Yamaha H2 - Hydrogen Outboard engine - Teaser - is this the future of boating ?

[@AchikSarih]

Merci beaucoup ❤❤❤❤❤❤❤❤

[@SushikiIIer]

Just for reference it takes about 50-55KwH to produce a kg of hydrogen and that 1kg of hydrogen only contains about 33KwH of chemichal energy. Although hydrogen is nearly tripple the gravametric energy density of gasoline(120KJ/G vs 46MJ/G) ; even at 700Bar (not psi freakin bar so 10,150psi) hydrogen only has a volumetric density of only 5.4MJ/L compared to gasolines 34MJ/L. This may sound like nonsense but in simple terms you would need 1.) Nearly twice the volume of hydrogen tanks to acheive an equivelany fule storage as gasoline (less room in your vehicle + 10,000psi highly flamable tanks of compressed gas) 2.) Hydrogen fule as stated earlier costs about twice as much energy to make as is can produce so your already essentially at the same ~50% theoretical efficiency as any gasoline drive ICE anyways xD

[@mecuzo]

ok Einstein

[@MarcusKeeler]

Gas pump rage at the dock is already a thing, can you imagine lining up and waiting for 20 minute fill-ups? LOL

[@yachtandseatv7160]

That's one of the problems, and that's why it's a path for the future, not a solution for today

[@SushikiIIer]

​@@yachtandseatv7160 hydrogen costs 40% more energy to make a Kg of hydrogen than it even contains in the first place (50-55kw to make a kg & 30-35kw contained wihtin a kg or hydrogen). Even if that wasnt an issue (ie. we have infanite free green energy somehow) at 10,000 psi those hydrogen tanks only contain less than 1/6 the volume of fule so even if hydrogen is tripple the energy density per gram your still wasting 2x more space for fule tanks than needed (or loosing 1/2 your range).

[@eddisonyoung8384]

Cooperate word salad. What are it's capabilities... range, top speed, cruise speed, serviceability?

[@yachtandseatv7160]

If you'd watched to the end, you'd have part of the answer... First official tests this summer

[@zachmoyer1849]

Why not a fuel cell? Wouldn't you get more range from less hydrogen onboard? I still think fully electric will penetrate this market as well. You can get away with cheaper battery chemistries as you are not as penalized with weight on a boat like you are in a car. I think people would have to look at their usage. I go out with my uncle off the coast of Jersey, and we never really do more than 60 miles in a day. People who cover more distance may need to consider hydrogen options, but I think most people will find electric versions will suit their needs.

[@yachtandseatv7160]

You are right. By the way, the average distance covered by boaters is 17 miles a day... it means that is probably suitable for lots of people.

[@ct1762]

did you really say weight isnt as important in a boat as in a car? i hope i read that wrong but in case i didn't, boats (especially planing hulls like all outboard boats big enough to go offshore fishing) and MUCH more weight sensitive. heavy batteries are dangerous in a boat as they stay the same weight, and have about 5x less range with virtually nowhere to charge lol

[@willlawrence7157]

Looks like repower market will die lol