Quick question about peltiers.
I have a small polystyrene box (250mm x 200 x 250 tall) that I want to keep at aroud 8 deg C to keep earthworms alive in 'tupperware' and a bit of water, for up to three weeks for my axolotl. I know the worms will survive at that temp for that time and even empty out their guts which is an advantage.
I'm going to mount a 150 x 80 x 25mm fins aluminium heatsink in the lid, cut out a square of the lid big enough to fit a 40 x 40 peltier
I have a 12v 5A power supply that came with an early LCD computer monitor and will control temperatues with one of these;
I ordered three of the peltiers. My question is should I just use one peltier or would it be more efficient to stack two or more? I intend to use an adjustable LED driver to control the current to the pelteir/s. (I have more than one LED driver available.) I'd rather get input before I assemble it than have to modify it afterwards. My concerns are ability to maintain the required temperature in ~25 degree ambient and power consumption.
As the box will only be opened once a day I doubt I'll need to drive the peltier/s to the advertised amount. I have alternate, more powerful PSUs available of needed and thermal interface goop. Input appreciated, I've never used peltiers before.
Happy holidays etc etc.