Yes, I suspected it was for that!
Because seeing no ad to sell second-hand freezers in Mali, and the ice-cream vendors making their butter along the roads, I thought it could be the goal ^^
There your system will be in constant demand, so no joke, you need a solution "that holds the road" and not improvisation.
It is necessary to take care of a good location of the freezer, the best would be to bury it by making a small cellar in cement and in the shade of the house (which you could cover the day but by letting the heat evacuate from above , while the cold remains below ...)
Then, contrary to what has been said, it is better to produce using the batteries at night (since it is cooler at night the compressor will work less), because the day with 40 ° C it will not be easy! You must therefore oversize the installation accordingly (panels / battery) ... Beware of a crucial point: make sure that the installation is tamper-proof so that the panels are not stolen ...! (This was my main concern ...)
You would have to find square and flexible molds in which you could put your plastic bags so that they match the shape (sort of cardboard or rather plastic? It must be flexible since the ice changes in volume), so that it is possible to put more by freezing ... (well it's optimization, what ...)
But basically, if I were to do this, I would have two types of freezes. A very efficient to freeze and others that would need to be much less to be used only for storage! Besides, in the limit, a shaded cellar with a thick cover and expanded polystyrene walls should be enough, since the ice blocks are used to keep the temperature as low as possible and the cold cannot escape!
izentrop wrote:obamot wrote:It is difficult to over-insulate a freezer (see impossible) if the compressor is part of the body of the equipment, simply because the radiator and the compressor produce heat which must be removed!
Obviously, you must insert the additional insulation behind the grid and not in front
.
Except that there is very little space between the two, so with insignificant gain if we add insulation ... Which would also be nonsense, since it would be added over the metal walls which are a good thermal conductor! It would therefore be necessary to isolate the entire body of the freezer in a hermetic manner in order to be able to measure a significant difference in magnitude: eXergie (but this would be to fight against the thermal inertia of the metal walls ... and that does not absolutely not worth it ...)