5 ms·

It would be interesting to see those huge tesla batteries on a large ship,(like a retired oil supertanker) charging at one point, and discharging at the destina

It would be interesting to see those huge tesla batteries on a large ship,(like a retired oil supertanker) charging at one point, and discharging at the destination. Leave enough to power the ship back home, and just have several of them. Probably not as efficient as power lines, but could go to multiple destinations.

deleted 6y ago
[deleted]
teruakohatu 6y ago
Singapore is already supplied with energy from ships (natural gas). So energy density will determine how many ships would be required. Depending on conversion efficiency, we are talking 50-150x as many lipo ships as natural gas ships. If Singapore only needed one natural gas very large super tanker, we would need to increase the global feet of super tankers by 7-20% just to ship electrical energy to Singapore.
- baybal2 6y ago
  Lets do the math: Cheap LFP batteries get around 160-170wh/kg. Largest supertankers have net tonnage of around 250000. 250000000 * 170 = 42.5GWH. Quite respectable. Karadeniz (the biggest floating powerplant operator) has actually floated the idea.
  - Reason077 6y ago
    Another option for "shipping electricity" is compressed hydrogen. Electricity + water goes in at one end (electrolysis), then converts back to electricity + water at the other (fuel cells). Hydrogen has significant inefficiencies and conversion losses compared to batteries, but the energy density is much higher (up to 40,000 Wh/kg)
    - lostlogin 6y ago
      There is mention in this thread of solar power prices going negative for suppliers at times. This would make suggestions like this even more favourable.
  - pjc50 6y ago
    https://www.statista.com/statistics/627209/electricity-consumption-in-singapore/ https://www.statista.com/statistics/627209/electricity-consu... "2018, the amount of electricity consumed in Singapore reached about 50.5 thousand gigawatt hours" So if you can manage three of those arriving every day you can meet Singapore's electricity needs.
    - baybal2 6y ago
      Yep, a very expensive alternative to a powerplant, given that full gravimetric capacity will not be achievable, but think further if batteries will continue improving, and becoming cheaper. If they can get usable flow batteries on a ship, this will be quite an option to powerships even today.
throwaw4y-plate 6y ago
Could the battery power the boat?

deleted 6y ago

[deleted]

teruakohatu 6y ago

Singapore is already supplied with energy from ships (natural gas). So energy density will determine how many ships would be required. Depending on conversion efficiency, we are talking 50-150x as many lipo ships as natural gas ships. If Singapore only needed one natural gas very large super tanker, we would need to increase the global feet of super tankers by 7-20% just to ship electrical energy to Singapore.

baybal2 6y ago
Lets do the math: Cheap LFP batteries get around 160-170wh/kg. Largest supertankers have net tonnage of around 250000. 250000000 * 170 = 42.5GWH. Quite respectable. Karadeniz (the biggest floating powerplant operator) has actually floated the idea.
- Reason077 6y ago
  Another option for "shipping electricity" is compressed hydrogen. Electricity + water goes in at one end (electrolysis), then converts back to electricity + water at the other (fuel cells). Hydrogen has significant inefficiencies and conversion losses compared to batteries, but the energy density is much higher (up to 40,000 Wh/kg)
  - lostlogin 6y ago
    There is mention in this thread of solar power prices going negative for suppliers at times. This would make suggestions like this even more favourable.
- pjc50 6y ago
  https://www.statista.com/statistics/627209/electricity-consumption-in-singapore/ https://www.statista.com/statistics/627209/electricity-consu... "2018, the amount of electricity consumed in Singapore reached about 50.5 thousand gigawatt hours" So if you can manage three of those arriving every day you can meet Singapore's electricity needs.
  - baybal2 6y ago
    Yep, a very expensive alternative to a powerplant, given that full gravimetric capacity will not be achievable, but think further if batteries will continue improving, and becoming cheaper. If they can get usable flow batteries on a ship, this will be quite an option to powerships even today.

throwaw4y-plate 6y ago

Could the battery power the boat?