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  • guy.lamoureux.7 commented on velacreations's instructable Cheap and Easy Solar Heater2 months ago
    Cheap and Easy Solar Heater

    Yes, yes and yes. But it will never take 3-4 heating seasons to dry out rocks. Most rocks absorb less than 0,4% of their weight in water. It will dry out in a few days and maybe 1% of the energy will be "lost" to evaporation. And this water vapor will be released in the house and will contribute to warm up the air.A wet towel absorb 90% of it weight in water and it dries out in a few hours.When I sweat, I drink water. Rocks that sweat don't. Thermodynamics is not that complicated. Mass is mass even if it's water. It absorbs heat and it gives back heat.

    Why "phase change" ? Rocks can absorb heat without changing phase. Leave a rock in the sun and it will get hotter. And it doesn't take a few seasons to dry out rocks.

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  • guy.lamoureux.7 commented on velacreations's instructable Cheap and Easy Solar Heater2 months ago
    Cheap and Easy Solar Heater

    Mass is mass. Whether it's rock or water, it will heat up equally. Do you "dry out" your water when you heat it up to make coffee ? No ! Maybe the rock was drawing a lot of humidity in the house for the first week or so. Most rocks don't absorb water anyway.

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  • Standing Pallet Desk - Epoxy Finished

    "Why Read When You Can Watch?" Reading diagonally is much faster. I can do it in 2 minutes instead of looking a 9 minutes video. I learned faster that it's a stand-up desk that we can't change the height easily. Very interesting idea anyway. I could fabricate a table or a bench with this technique.

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