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Unread 09-13-2005, 11:47 AM   #12
bobkoure
Cooling Savant
 
Join Date: Feb 2003
Location: USA - Boston area
Posts: 798
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I've often thought that copper pipe with swaged aluminum fins (like in a baseboard heat register) might make a good passive radiator, although IMHO it'd work better with longitudinal fins (rather than perpendicular) to assist air-thermosyphon - went searching for an example and found this:

which, sadly, probably costs a lot - but offers the possibility of a non-aluminum reserator-like-thing...
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