Molten sodium, with a ceramic separator, might just be the ultimate in dangerous energy storage for a boat.
I would rather go nuclear...
Liquid sodium batteries are currently in use for utility power demand leveling in Japan, where the complex system can be monitored and maintained "safely".
These batteries require heating during resting and low power output, and cooling during medium and high output. If they cool down, they cannot be discharged. If they over-heat, they'll burst their separators and drip liquid metal. Ever see sodium touch water. Check it out on YouTube. Better crank down that stuffing box nut an extra turn.
Be Safe,
Arby
From: Matthew Geier <matthew@acfr.usyd.edu.au>
To: electricboats@yahoogroups.com
Sent: Tue, November 16, 2010 10:22:24 PM
Subject: Re: [Electric Boats] Zebra Battery - molten sodium aluminumchloride (NaAlCl4),
I would rather go nuclear...
Liquid sodium batteries are currently in use for utility power demand leveling in Japan, where the complex system can be monitored and maintained "safely".
These batteries require heating during resting and low power output, and cooling during medium and high output. If they cool down, they cannot be discharged. If they over-heat, they'll burst their separators and drip liquid metal. Ever see sodium touch water. Check it out on YouTube. Better crank down that stuffing box nut an extra turn.
Be Safe,
Arby
From: Matthew Geier <matthew@acfr.usyd.edu.au>
To: electricboats@yahoogroups.com
Sent: Tue, November 16, 2010 10:22:24 PM
Subject: Re: [Electric Boats] Zebra Battery - molten sodium aluminumchloride (NaAlCl4),
On 17/11/10 11:21, Galstaf wrote:
>
> Sodium aluminumchloride (245 Celsius) are already in use in some electric vehicles in Europe (see http://en.wikipedia.org/wiki/Modec) .. has anyone heard anything about them in the States or perhaps got any idea about reliability or pricing.
> They seem suitable for a boat with a constant charge source (wind/solar/shore power).
>
> Thoughts or comments?
>
How to you 'cold start' if on a boat and you have let the system cool
down ?. You need an alternative power source to get the system running
again, which if anchored in a remote bay some where, plugging into the
'grid' to kick start the system will not be an option.
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