I've become a little obsessed with Seasonal Thermal Energy Storage (STES) and it's practical implementations e.g. Borehole Thermal Energy storage (BTES), Underground Thermal energy storage (UTES). https://en.wikipedia.org/wiki/Seasonal_thermal_energy_storage
The projects I've seen on the internet are fairly poorly documented & communicated and all done on a community-wide scale. I think there's massive potential here we are missing, residential and industrial heating and cooling make up big chunks of global energy use. I'm wondering if there is a way to commercialise UTES on an individual level, so the same way a homeowner chooses to buy a Tesla power wall, they could choose to buy a Seasonal thermal battery.
I'm thinking of jumping in and trying to bury a thermal energy store underground and heat it up but I'm struggling to make the trade-offs in design due to lack of understanding of the heat loss and gain.
Anyone know of anybody doing something similar, or anyone who can give me advice on some of the calculations? Any feedback much appreciated!