John Carmack wrote: > Have you considered just using a dewar of liquid nitrogen for the freeze > wheel? In the long run it would certainly be cheaper to have dedicated > refrigeration, but an easily metered source of "unlimited cold" would > probably make it easier to prove or disprove the basic idea.
Hmmm... it's an idea that we've considered at least in passing; it could in principle work... it looks like a pound of LN2 will absorb about 150 BTU evaporating and rising to -40F - so a flow of 40 lb./hr would give 6000 BTU/hr of cooling (equivalent to the rating of the upsized refrigeration unit I presenty have on order). That's not totally out of the question for a pilot project, though I'm sufficiently immersed, at the moment, in the endeavor to achieve the necessary temperatures with mechanical refrigeration that (for better or worse) I'm a bit reluctant to "change horses in midstream"... -dave w _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
