Nerdy things I happen to know part one.
Thermoaccumulators, in particular - phase-changing materials. So imagine a house being heated in winter or late autumn. The temperature outside swings from hot to cold, back and forth, and it’s aither colder inside at night or the heating is more intense, thus spending more energy and money. Would it be cool to store the excess heat accumulated during the day and release it at night?
Guess what, we can do just that. A highly concentrated salt solution stores energy when it’s being molten and releases it when solidifying, thus cutting heating costs and reducing carbon emissions. A temperature at which this transition happens depends on the solution’s composition and can be tuned to suit the particular use case.
PCM usually come in a form of plastic capsules with solution inside. They are put into heat-insulators inside walls or in some cases into bricks themselves. It’s very useful technology that is already in use, but it requires a thorough research on the water-salt system properties. That just happens to be my job.
When I first did this, I shut my furnace off and never turned it back on. That was over a decade ago. (And I live in an area where it gets very cold.) It’s works very well.
I use 3-liter plastic bottles filled with water. I try to place them near the center of the building and also try to put some where they can catch some of the sunshine through the windows.
There are also seasonal thermal storage techniques where you capture the heat from summer and store it in a large container (with a low surface to volume ratio) and then use that stored heat in the winter.
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