Jump to content


Photo

hydrogen powered superyacht?


  • Please log in to reply
31 replies to this topic

#11 khayyam

khayyam

    Advanced Member

  • Marine Forums Only
  • PipPipPip
  • 569 posts
  • Locationnorth shore

Posted 07 November 2019 - 10:40 AM

Yes, but you can make it from water+electricity -- unlike diesel. Turning 'naki gas into hydrogen doesn't make a lot of sense, but you could certainly use all of that spare electricity down south if the smelter stops using it.


  • 0

#12 darkside

darkside

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 416 posts

Posted 07 November 2019 - 11:04 AM

"Renewable" energy for hydrogen production will be here soon. Tuaropaki Trust and some Canadians will be using geothermal to produce hydrogen next year at Taupo. Hiringa and Ballance using wind turbines in Taranaki on much the same timeline.
  • 0

#13 wheels

wheels

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 16,808 posts

Posted 07 November 2019 - 11:29 AM

I really cannot see liquid hydrogen being stored on a Boat for all sorts of practicle reasons. Besides, how would you fill the tanks again. No ordiary tanker is going to be able to pop down to the local marina and jerry cans from a Car refilling station is not going to be sucessful.
  • 0

#14 erice

erice

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 4,361 posts

Posted 07 November 2019 - 03:02 PM

the LNG tankers that supply gas to japan from the timor gap? and kamchatka?

 

maxresdefault.jpg

 

have HUGE well insulated, spherical pressure tanks on them to keep the natural gas low volume liquid  

 

but there is still a "boil-off" which is captured and runs the ships engines

 

LNGtanker.jpg

 

presumably a superyacht as big as this hydrogen beastie will still have a daily liquid hydrogen boil-off AND won't actually spend a lot of time at sea

 

maybe it could run the fuel cells and provide power back into the grid?


  • 0

life is short

 

live it!

 

without fear or prejudice 


#15 wheels

wheels

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 16,808 posts

Posted 07 November 2019 - 04:23 PM

But liquid H is vastly colder than LNG. It boils at -252C. A pressure vessel of hydrogen is ruffly at 5000PSI.

But interestingly, liquid Hydrogen is not an economical means of storing the energy it contains. Umm, how do I explain that better? It has poor energy density. You can actually store more Hydrogen energy in a Hydrocarbon liquid like Petrol, than as pure liquid Hydrogen. In fact, there is ruffly 65% more hydrogen in a ltr of Petrol than a ltr of pure Liquid Hydrogen. Try getting your head around that one.
  • 0

#16 Black Panther

Black Panther

    Advanced Member

  • Administrators
  • 5,803 posts

Posted 07 November 2019 - 08:40 PM

Using electricity to make hydrogen will use more energy than it creates. And electric motors at way more efficient than a combustion engine. So why would you bother?
  • 0
  Two figures sat side by side, staring at the Sea. One said to the other, “You know that one day we will die.” And the other friend replied, “But all of the other days WE WILL LIVE!”

 


#17 harrytom

harrytom

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 1,898 posts
  • LocationAuckland

Posted 07 November 2019 - 10:47 PM

Last Sunday was privileged to go for a test drive in a Tesla model 3,0 to 100 in 3 seconds,full charge 650km apparently and if charged at home $2.   $90k though. battery they say will last at least 300thousand kms before replacement.


  • 0

The boss said "see you in the morning"didnt know he liked sailing


#18 wheels

wheels

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 16,808 posts

Posted 08 November 2019 - 04:17 AM

 

Using electricity to make hydrogen will use more energy than it creates. And electric motors at way more efficient than a combustion engine. So why would you bother?

Correct if you make it the old fashioned way using electrolysis. But that it not how it is produced commercially.
And the article states that the Hydrogen is passed through a cell producing electricity. So the Vessel must be electric powered.

Modern Hydrogen powered Vehicles are electric powered. Are far better for the environment than anything battery powered and most especially for the Countries that get electricity from means other than Hydro. The only thing holding them back is the refilling stations. Electric charging is easy to install. Hydrogen refueling stations will require a large chunk of investment to establish.
 


  • 0

#19 Black Panther

Black Panther

    Advanced Member

  • Administrators
  • 5,803 posts

Posted 08 November 2019 - 04:30 AM

So what is the modern way of producing hydrogen and what is the energy calculation for it?
  • 0
  Two figures sat side by side, staring at the Sea. One said to the other, “You know that one day we will die.” And the other friend replied, “But all of the other days WE WILL LIVE!”

 


#20 wheels

wheels

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 16,808 posts

Posted 08 November 2019 - 06:25 AM

There are several processes and some are still so new, the technology is still secret. Currently, the cheapest commercial method is steam reforming of Hydrocarbons. Especially the "Off Gasses" that are produced during refining.
I use a method in my plant that purifies the off gasses and turns them to Hydrogen and that is then fed back to the burner for heating the plant. That allows me to start the plant on a liquid fuel and then once it is running, reduce the liquid fuel consumed as the Hydrogen kicks in. It is a beautiful clean burning and very hot flame.


  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users