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Re: [TRNSYS-users] Nocturnal Cooling

John,
  It depends a bit on what you are trying to do. If you are trying to cool a building using a metal roof, I think that the standard TRNSYS building model (Type56) would give you that effect. If you have got an actively ventilated airspace behind the metal roof then I think we might have an unglazed air-based solar collector that might work. If you have fluid pipes on the back side of the metal roof then it might be that the model Jeff was mentioning would be most appropriate.
Kind regards,
 David



John Hollick wrote:

We are looking at how to determine the night cooling potential of a metal roof and wondered if your collector module could do that or if you have any results showing the amount of cooling that you obtained from your tests.

 

John Hollick

Conserval Engineering Inc

E: jhollick@solarwall.com

 

 

 

 

Jeff Thornton thornton at tess-inc.com
Tue Jan 8 10:02:31 CST 2008 

<The component library has collector modules which cannot be linked to the
effective sky temperature. As a result I am not able to estimate the
radiative losses correctly. Is there any radiator/collector component that
I can link to effective sky temperature? >
 
Our (TESS Libraries) unglazed flat plate collectors do exactly as you
suggest.  We have used them in projects where the user collects heat
during the day into a large storage tank then charges a large cooling tank
at night by rejecting heat to the ambient/sky.
 
Let me know if you'd like details on the model.
 
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 at tess-inc.com
Web: www.tess-inc.com
 

 

 


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Thermal Energy System Specialists (TESS), LLC 
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