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Re: [TRNSYS-users] Type 71 RATIO-Factor

To: lotta.koch@pse.de, trnsys-users@engr.wisc.edu
Subject: Re: [TRNSYS-users] Type 71 RATIO-Factor
From: "Jeff Thornton" <thornton@tess-inc.com>
Date: Thu, 8 May 2008 13:53:23 -0500 (CDT)
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> in the sourcecode of Type 71 (evacuated tube collector) I found a
> RATIO-factor which is multiplied with the power gain. It has no big
> influence if your parameter "massflow at test conditions" is high enough
> (more then about 3 kg/hr). But nevertheless: does anybody know where
> this factor comes from?

The RATIO term is a combination of factors that account for performance of
the collectors connected in series and the performance of the collector at
off-rated flow conditions.  The documentation for the Type explains in
details the equations for these factors.

Jeff

Jeff Thornton
President - TESS, LLC

2916 Marketplace Drive - Suite 104
Madison WI 53719 USA

Phone: 608-274-2577
Fax: 608-278-1475
E-mail: thornton@tess-inc.com
Web: www.tess-inc.com

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