Michael Vasser, thanks for the start of the calculation. Shame you didn’t actually finish it by giving energy needed to maintain temp per metre squared. This could be from 1 watt to 1000 watts, I don’t personally have a good estimate of insulation/nitrogen loss at this temp.
Taking into account how much energy will be needed to take 150k heads down to −200 degrees C, would also be good. I am pressed for time, so I may not get around to it.
Michael Vasser, thanks for the start of the calculation. Shame you didn’t actually finish it by giving energy needed to maintain temp per metre squared. This could be from 1 watt to 1000 watts, I don’t personally have a good estimate of insulation/nitrogen loss at this temp.
Taking into account how much energy will be needed to take 150k heads down to −200 degrees C, would also be good. I am pressed for time, so I may not get around to it.