<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=iso-8859-1" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.19019">
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV><STRONG><FONT face=Courier>Clarke Olsen </FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Courier></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Courier>>... built an air-cooled wall collector where
the incoming air went <BR>> up between the absorber panel and the
glazing, over the top and down</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Courier> the back, for a double wash of the
absorber...</FONT></STRONG></DIV><STRONG><FONT face=Courier>
<DIV><BR>> Would collection be improved by making the
spacing asymmetrical; <BR>> that is, making the air go faster on
one side (glass side?) of the plate?</DIV>
<DIV> </DIV>
<DIV>Efficiency would improve with slower air near the glass.</DIV>
<DIV> </DIV>
<DIV>Nick</DIV>
<DIV> </DIV>
<DIV><BR> </DIV></FONT></STRONG></BODY></HTML>