I think the filters were to protect the flow meter. I think the water was just out of the taps and who knows what Greek water is like. I have been struggling with making some variable heat conductor for similar problems. I started with segmented disks that you turn to change contact area. I then used adjustment of ferrofluids to change contact. I am now using a sliding tube in a tube with heat pipes by raising lowering my heat take off. For them, it should be easy enough to change the number of loops of water tubing around the cell to get in the right ballpark. D2
Date: Mon, 12 Aug 2013 15:51:26 -0400 Subject: Re: [Vo]:Suggestions for a more effective demonstration From: [email protected] To: [email protected] DJ Cravens <[email protected]> wrote: You would not need to go to 90C. The concept of heating a volume of water is very valid. In this thread, I was assuming that Defkalion DID have to go above 90°C. For some reason. Otherwise, why didn't they speed up the flow? That would simplify the calorimetry, and it would capture all the heat with their on-screen computation, which would make the results a lot more impressive. I have no idea why they might have needed such high outlet temperatures. To keep the machine at a critical operating temperature? They could fix that problem by insulating the cooling water pipe. Someone said they could not speed up the flow because there were filters on the water pipe that restricted the flow. This makes no sense to me. Why do you need to filter cooling water? It isn't going into any sensitive part of the reactor. It cannot contaminate anything. Contamination from ordinary city water does not affect the heat capacity measurably. Questions like this cannot be adequately addressed in a demo. You need a real test. You need a team of experts who spend days or weeks on site, wringing out the machine. - Jed
