been very busy with other stuff but now I'm back to solar.
This summer I want to build a scalable heatbank. I need your thoughts on this project. I plan to make a 1 cubic meter (35 cubic foot) big insulated below grade heatbank and above that an insulated 1 cubic meter big air filled empty space.
I want to deploy temperature sensors within and outside the heatbank, the empty space above and the outside and log them.
My main question is: How scalable would that be? Let's say instead of 1 cubic meter I use 8m3 (2mx2mx2m) for both heatbank and empty space,
that means in my example with a dirt wall to the north (for simplicity I will ignore that area) the surface exposed to the surroundings would increase from 5 square meters to 20 square meters, the surface directly exposed to the elements of the space above grade would increase from 4 square meters to 16.
So it looks the bigger I make it the better the performance should be? Frankly I "tried" to calculate the whole thing but... you know :-)
The effort even for 1 cubic meter is considerable, so this is what I would like to go with, not bigger.
See the attached picture please for reference