3 ms·
Your freezer can do that, but your fridge can not. The safe range is 40-35 (4.4-1.6), however your food will spoil faster. It's better to keep it 37-35 (2.7-1.6
by ars 6y ago
Your freezer can do that, but your fridge can not. The safe range is 40-35 (4.4-1.6), however your food will spoil faster. It's better to keep it 37-35 (2.7-1.6).
That's a very narrow range. You might be able to pre-cool the freezer, and use some of its cold to keep the fridge where it needs to be.
But I suspect you would pay for that in lower efficiency, because the colder you need to go the less efficient the cooling is.
Electricity prices would have to be dramatically lower to make it worth taking your freezer extremely low to store cold.
I suppose you could make a freezer with a special water storage compartment (filled at home to reduce weight), then use that to store cold. But with the extra complexity, and lower efficiency.... just how much lower electrical prices are we talking?
- bboreham 6y agoElectricity prices go negative at times.
- grandinj 6y agoThats not a narrow range at all for a very well insulated fridge.
- ars 6y agoDon't forget that people open the fridge, it's not realistic to make a fridge that you are not allowed to open at certain times.
- grandinj 6y agoNot necesary to make that requirement. The way stuff like this works, is that with a fairly simple set of end-point power controland some pretty simple monitoring, and then some central smart software, you can effect pretty dramatic improvements. For example, the smart controller allows the fridge temperature to drift (just a little), similarly with central heating, and geyser, and the net effect is that power draw is temporarily reduced during peak times. Multiply this over your whole year and you have some cost savings. Multiply it over a whole neighbourhood, and the utility can dramatically reduce their cost of maintenace, and their cost of deployed capital. (Because of reduced power/thermal swings in their equipment, and reduced peak carrying capacity of the network)