I currently have an "air tight" style wood stove with the ash pit style clean out under the burn box and has an air jacket around the burn box. Currently I have blocks around the outside to act as a thermomass which seems to be working great. I've been liking the idea of having two separate burns in the wood stove to save a little wood and have a heat sink so the house doesn't shoot to 90F during a good solid efficient burn.
I'm planning most likely some bricks on top and build some sort of small oven and figure out a way to control the temps inside with the air jacket fan system and switch it between just pumping heat off the stove vs keeping the "oven" around the correct desired temp. I'll have to dig into that more later.
Anyway, I've read a bit about using water and the best solution I've seen people actually use was 2 liter bottles filled with water lined along their walls on the floor (like behind the couch and such). I understand that steam + pressured (closed) systems is a science I'm not looking to explore. However, in terms of effectiveness, wouldn't it be more logical to place the water on shelves along the tops of the walls to absorb more heat from the wood stove? The down fall with that idea in a passive sense is the fact the heat won't want to go down, so the top of the house will stay warm while the bottom/floors will cool down.
Another idea I've been pondering is to soak up excess heat with a water jacket (copper tubing) and keeping it a open system with a large vent encase the water gets the boiling temps (say power outage). The main mass storage of water in this type of system would be best placed under my house on the cement slab in the crawl space. I'm thinking it might be safer to use kind of a two loop system, basically a large vented loop right by the stove that uses a little water (say 6-7 gallons), then when it is warm enough, mix it into the storage tank. Logic behind it would be the vent would be sized for the 6-7 gallons and the main storage tank wouldn't ever have a chance to directly interface with the wood stove heat. Does this seem like an acceptable idea, or is the double loop idea just a bunch of wasted effort?
Down the road, I could tap into the storage tank, and pump the water though pex tubing in the floors.
I'm more or less thinking out loud and looking for some feed back. I'm a hobby programmer of around 18 years, and probably would be looking to use a raspberrypi to control everything even though I've never used one personally before. Website linked below. I also attached a paint diagram to better illustrate the idea since I'm not always the best with words. My wood stove already has a copper winding for water.