Water bottle jacket in mass for RMH ... Effective?

Was looking around the property

What if i filled with water and capped beer bottles and laid them in layers with the thermal mass in the thermal battery construction?

Is that an efficient method?
Soooo many bb's round here

I guess it would depend on how long you want your mass to last. cheap bottle caps are metal, so they're going to rust out eventually. could take a number of years, but it will happen, especially if they're in contact with clay.

I suppose you could stack them upright, which might solve the problem of rusty bottle caps leaking into your cob.

I would not put them too close to your exhaust flue so that they don't get too hot and crack.

water is a pretty darn good thermal storage medium, but the whole fluid issue does complicate things.

i think it would work. I'd probably aim the top of the bottle away from the heat, just because, but water supposedly stores 5 times the amount of heat vs. air, so it should hold the heat quite a while. I mean, most are building thermal masses out of broken concrete so filled bottles of water can't be any worse... the only issue would be that no one has really tried or proven it, so you may be the first! post your results please.

there is a much lower risk of boom squish with smaller amounts of water under more weight from a bench but think that you would be best palcing them near the outer edge to avoid the risk of them getting hot enough to convert to steam and work either a hole, pressure point, or weak spot that encourages random cracking or something, im all for getting water in there and using up those beer bottles but they may just cause some kind of problem at some point

i saw this thing online where a guy stuffed a beer bottle with organic matter and innoculated it with mushroom mycelium, fruiting an oyster mushroom from the mouth of the bottle, i thought it was quite cool and hope to eventually replicate it after collecting more coffee grounds from the coffee drinkers in the family

This is a semi permanent project in a greenhouse. 4x12 raised beds

Trying to dig up positioned bottles out of pea gravel may or may not be beyond its worth down the road
Perhaps placing the brown bottles in the outer parimeter in its own solar mass

I'll keep thinkin

I'm seeing objects around my 40acres as mass now

River rock is lookin dense, large stones
I wonder which is a better battery for equal volume

Bottle water plus filler
Or big river rocks plus filler

Devon Olsen wrote:

i saw this thing online where a guy stuffed a beer bottle with organic matter and innoculated it with mushroom mycelium, fruiting an oyster mushroom from the mouth of the bottle, i thought it was quite cool and hope to eventually replicate it after collecting more coffee grounds from the coffee drinkers in the family

Very cool project
But I prefer suspended columns of inoculated straw
But a fruiting bottle would be a great gift