Describe the the feature you'd like
its a block powered by FE and produces cold. like the resitive heater but with cooling instead of heating

Describe alternatives you've considered
some liquid or block for cooling

ok
but what's the purpose of this?
i mean, where it can be used?
how much can it be useful to the average player?

Its useful for so many other mods because no other mod adds such a Block and cooling is for example for the pneumatic craft mod very useful. For the average its useful because in nearly every modpack you need an cooling liquid/block

I don't see much point of this in Mekanism, as there is not much point to a cooling block in mek just because other mods don't provide a way to cool themselves.