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it's how "rocket stove" works: https://en.wikipedia.org/wiki/Rocket_stove https://en.wikipedia.org/wiki/Rocket_stove Since you burn the wood really fast, you n
by logtempo 3y ago
it's how "rocket stove" works: https://en.wikipedia.org/wiki/Rocket_stove https://en.wikipedia.org/wiki/Rocket_stove
Since you burn the wood really fast, you need to delay that heat release. That's where sand comes in as a cheap and good enough material. There are also systems that heat water and store it in a tank, which also make sense if you want hot water in your house too.
- zdragnar 3y agoSand is actually pretty bad. Gravel is a little better, clay is best. Sand is really only useful here because that much clay is usually significantly more expensive and would take forever to dry out. Source: researched the shit out of and have built a rocket stove.