3 ms·
Thinking of charging is also interesting. What is the power requirement for that? If they use 40MW under operation, it means they must charge faster unless they
by Ekaros 11mo ago
Thinking of charging is also interesting. What is the power requirement for that? If they use 40MW under operation, it means they must charge faster unless they spend at least as long time charging. So that capacity requirement can get quite high.
- Workaccount2 11mo agoMassive battery banks at the ports. Charging batteries off of batteries can yield incredibly fast charge times.
- 5d41402abc4b 11mo ago>Charging batteries off of batteries can yield incredibly fast charge times How?
- Workaccount2 11mo agoBatteries have low internal impedance. A grid can do it too, but spiky 400MW loads are difficult and annoying for a utility. And the port, who would probably have to call in to schedule charging. It's much easier to "trickle" charge a grid scale battery bank, which can then be used however the port wants whenever they want without upsetting the grid.
- MengerSponge 11mo agoBatteries are also already DC and easy to make arbitrarily high voltage. I wonder what the "trickle" power requirement is? Knowing next to nothing about shipyard logistics... 20MW?
- Ekaros 11mo agoIn the end, all those battery powered ships needs to be charged. So it is their total energy consumption split between harbours over some period. And as we are talking about trickling you could pretty much average it. It likely will depend on patterns of harbour. Like how many ships visit, what sort of distance those go. And how much of total time is spend charging some ship. Worst case is maximum distance trips and maximum utilization that is there being ship almost always being docked. Apart from times when docked ship change.
- stavros 11mo agoBatteries are, as an approximation, charged at 1C, so for a 40 mWh battery you need 40 MW.
- AnthonyMouse 11mo ago> spiky 400MW loads Ports can have 10+ container ships at once and unloading one can take multiple days. You're not surprising the power company with sudden loads, you're building a big power plant at the docks and then selling power to the grid during the part of the day when the price is high and charging the ships when it's low.
- j16sdiz 11mo ago> Massive battery banks at the ports. These kind of infrastructure is not something you can build in 3 year. You need more than one port having that.
- jabl 11mo agoSure. Just like coaling stations and bunker fuel facilities didn't pop into existence with the snap of a finger either. Yet somehow they were built, eventually.
- PunchyHamster 11mo agowell, they started from smaller ships and grew in decades to the size they are now. Pretty sure we want faster timeline
- nradov 11mo agoWho is "we"? If this happens at all then it's going to take decades. There are severe constraints on the supply chain and skilled labor force.