It would melt if you just do air cooling. I did some math for liquid nitrogen which has heat of vaporization as 200 kJ / kg. It would boil 3600*15/200 = 270 kg

It would melt if you just do air cooling. I did some math for liquid nitrogen which has heat of vaporization as 200 kJ / kg. It would boil 3600*15/200 = 270 kg of nitrogen every hour. Just insane.