Hej Jinx. Tack f=F6r ditt meddelande 13:26 2003-01-15 enligt nedan: >> It would be interesting to see whether the thermal effects actually >> scaled up in a linear way. There is no good reason to think that >> they would if existing small lamps are the only experience base. >> I'm told that getting lamps to work well with differeing envelope >> shapes is something of an art. . > >I wondered whether they'd thought it through. He was asked about >the town's power bill for it, and replied that most of the energy would >be at the start, to get it heated up, and after that it would be quite >cheap to run. But the effect of a lava lamp comes about because >the top is losing heat so you have to keep pumping heat in at the >bottom. Suggestion: Heat pump pumping heat from top to bottom. >It seemed to be a giant leap of faith simply making a large >version of what's a pretty delicate balance. From experience in my >previous life as a process engineer in a resin plant I know what sort >of problems you get scaling up a 1 litre lab batch to a 2000kg kettle. >The dynamics are totally different. Anyway, good luck to them I guess it will look very different. /Morgan -- Morgan Olsson, Kivik, Sweden -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body