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limmeau
on June 6, 2012
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Zeolite retains heat indefinitely, absorbs 4x more...
I think there's a saturated solution of sodium acetate inside. The metal clickie causes the solution to crystallize, which happens to happen exothermically.
(IANAchemist)
vlisivka
on June 7, 2012
[–]
Can I use sodium acetate to heat my energy passive home (which I will build soon) by heating it at day in Trombe wall and discharging it at night?
xutopia
on June 7, 2012
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It's most likely unwieldy. Sometimes you can cause the exothermic effect to occur without you wanting it by a vibration or shock.
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(IANAchemist)