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Unread 02-23-2006, 12:52 PM   #75
bigben2k
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Join Date: May 2002
Location: Texas, U.S.A.
Posts: 8,302
Default Re: Wind Tunnel Construction

Just got back from visiting Bill; thank you Bill for a very informative learning session!

To update everyone else, since Bill is going to have access to a wind tunnel, I've bought the blower, blast gate, and hose that he had already acquired.

I'll be experimenting with the temperature controller that I just acquired, but after discussing it with Bill, it's now clear to me why it is going to be a problem. In short, Bill showed me his environmental chamber and the design of it. It is composed of a refrigeration unit and a heater unit. The air is recirculated in such a way that it is first cooled, then heated back up to the desired temperature. The reason for doing it that way (cool then heat) is to eliminate any fluctuations. The Haake chiller works the same way.

Thinking about it on my drive to work, the temperature controller probably won't be able to maintain a very steady temperature (which I've suspected). I'll test it out (in a small makeshift setup) and report results.

I have to make notes about everything Bill showed me today.
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