Tender ONE - The first HYDROGEN driven Vessel

Tender One - www.tender-one.com/
Video production:
MITRUMEDIA, Photo&Video production (www.mitrumedia.com)
Executive producer, D.O.P. & Camera: Matej Mitruševski
Video editor & CC: Mitja Mitruševski
Graphics & special effects & 3D animation: Matija Mlekuž
Music: Miha Franca

[@AngelLestat2]

you should made a future version with reversible fuel cells or with an extra electrolysis device equal to the power of the solar panel, so if the boat is idle over one week, it would recharge a part of the hydrogen by it self without wasting that solar panel. This is possible thanks to the new hydrogen electrochemical compression devices, which are efficient, small and silent.

[@L.M1792]

Good step forward. May need a little more than 108 miles range to become a truly attractive prospect. Good luck with your innovation

[@shakeexon]

I approve of this product 😎

[@matthanrath497]

The Ballard system is simpler with the battery being the oxygen and hydrogen converted back into electricity. Solar photovoltaics splits water into hydrogen & oxygen through electrolysis. Double wall honeycomb hull system could incorporate oxygen and hydrogen tanks. It would be safer and increase valued interior space. Fuel is the water that floats the vessel. Sun and wind generate the power to convert water full circle system.

[@AndyMatrix]

its possible to instal a small hydrogen station on the boat? using solar panels and sea water.

[@federicozenith4061]

Possible, yes; desirable, probably not. You would need an electrolyser (you can't just turn around the fuel cells, unfortunately), and a compressor rated for 350 or 700 bars, which is quite expensive, heavy and cumbersome. Since there is a few m^2 of solar cells in the video, I would not expect the output to be more than 0.5 kW at the best of times, and then the 42 kWh of batteries can absorb 84 h of production (more than a week, considering the sun is not always right on top of you).

[@johnkelvin2275]

@@federicozenith4061 interesting project! I want to need more explanation. May I have your e - mail for more discussion?

[@dejayrezme8617]

What is the overall efficiency for creating, storing and using hydrogen again? What is the energy density of a hydrogen fuel cell? With solar this doesn't matter too much if you can just create hydrogen when the sun shines e.g. at a harbor.

[@federicozenith4061]

Round-trip efficiency: about 30-40%. Seems low, but it is of little consequence: CO2 emissions are the same (=0) as for batteries (where efficiency would be 85-90%), and energy costs are much smaller than capital costs over the lifetime of the ship (both in the case of batteries and fuel cells). _Power_ density of fuel cells is about 650 W/L and 650 W/kg: the 90 kW in the video would require 140 L of space and extra 140 kg, not a problem. www.energy.gov/eere/fuelcells/doe-technical-targets-fuel-cell-systems-and-stacks-transportation-applications More interesting is the _energy_ density of hydrogen tanks. Assuming 350 bar composite tanks, it's 1.6 kWh/kg and 0.53 kWh/L (gross, i.e. including the weight of tanks, which are 10 times heavier than the hydrogen they contain).

[@dejayrezme8617]

Wow that is excellent info. Thanks a lot! Is that 1.6 kWh/kg including losses for converting hydrogen to electricity in the fuel cell? It's about 5 times the energy density of lithium batteries. It would be good to compare that with a combustion engine, but in actual real propulsive power. The power density of gasoline is higher, but the efficiency of combustion engines is much lower. So it might be actually be quite viable. The efficiency isn't that bad at all either. Especially for a boat where you'd often be anchored for quite a while and could generate surplus solar power. I have this idea (or maybe dream) of a power catamaran with a full bridge deck for lots of solar panels. Something like 10kWp. I think it could work for slow cruising on solar alone in sunny conditions. With additional hydrogen generation it would improve the situation even further. You could get a generator for backup or more speed, but a hydrogen fuel cell would be much better.

[@AM-2k]

Good stuff, however it would be a long time before availability of hydrogen in terms of supply chain is fully developed in most places.

[@supremeflagship8965]

Funny thing is that ships float on massive hydrogen reserves - H2O...

[@anshulbhardwaj4038]

30% of hydrocarbon fule is used by ships and cars this is the solution.we want this.