yeah, I know, I've bought a few dewars in my time.
I don't use the stuff in large quantities though, top-ups to the dewars with my cell banks in once a week really.
( the mighty badger Aphrodite, on a bar stool, by your side, Tue 20 Sep 2011, 16:09, 1 reply)

We used it in an experiment in power generation from it. We had a 950 litre high pressure dewar with a 4kW ambient evaporator attached to it and ran the nitrogen through an expander to generate power.

We vented the nitrogen outside because it's an asphyxiant despite the apparent air conditioning advantages. But we still managed to fill a huge warehouse with an eerie 2 foot deep fog that formed from air passing over the evaporator.

Fun day that :)
( Draconacticus Reject shampoo. Demand real poo!, Tue 20 Sep 2011, 16:14, closed)