Yes, miners are buggy in 1.00. They drill through bedrock. Which is reported to, once they drill through the lowest layer, just drain all the energy available. I don't recall any other bugs offhand.
I stumbled across one of Alblaka's posts on the idea:Alblaka wrote:
Ice is not considered a coolant and will not have any effect (yet).
So he didn't actually reject the idea outright. But it hasn't been added in half a year....
Thermal conductivity of ice is around 2 Watts per meter per Kelvin; water is only a third of that.
But water, being liquid, has convection that can transfer heat. And forced convection (pumping). And boiling. Water can hit heat transfer coefficients of 10,000 Watts per square meter per Kelvin under certain circumstances. 1000 W/m²K is pretty easy.
To be clear, these numbers are not directly comparable, because the units are different. One has inverse-meters, the other has inverse-square-meters. But really, water wins.
— 0x517A5D Ψ