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Will_Pearson comments on Timeless Identity - Less Wrong

23 Post author: Eliezer_Yudkowsky 03 June 2008 08:16AM

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Comment author: Will_Pearson 04 June 2008 10:13:00PM 0 points [-]

Hmm, assuming dewar levels of insulation* and a few other numbers guestimated like joules required to create a litre of N2 (2 KWh/l) I got 7 litres lost per second and a 50KW supply for energy.

* I'm not sure this is a safe assumption. A dewar is fully sealed, we are putting 495000 litres of material in per day.

It looks like the cost to freeze the heads would dwarf this as well, 137 litres per second of more dense material with higher specific heat capacity to cool to liquid nitrogen levels. Probably up to the megawatt range, if not more. Not taking into account travel energy costs and freezing costs while travelling.

It would be interesting to see whether it is better to have 1 giant store or many smaller ones. Anyone up for brainstorming a design? I am not too interested in personal survival but if it can be done for minimal-ish cost it would be very worthwhile from an archival of humanity point of view.