[TRNSYS-users] Nocturnal Cooling

[David Bradley]

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 at solarwall.com <mailto:jhollick at solarwall.com>
>
>  
>
>  
>
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> *Jeff Thornton* thornton at tess-inc.com 
> <mailto:trnsys-users%40engr.wisc.edu?Subject=%5BTRNSYS-users%5D%20Nocturnal%20Cooling&In-Reply-To=>
> /Tue Jan 8 10:02:31 CST 2008/
>
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> ------------------------------------------------------------------------
> <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 <https://www.cae.wisc.edu/mailman/listinfo/trnsys-users>
> Web: www.tess-inc.com
>  
>
>  
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-- 
***********************************************************************
Thermal Energy System Specialists (TESS), LLC 
David BRADLEY                      2916 Marketplace Drive - Suite 104 
Partner                            Madison, WI 53719 
                                   USA
P: +1.608.274.2577 
F: +1.608.278.1475
E-mail: bradley at tess-inc.com 
Web Pages:  http://www.tess-inc.com    and      http://www.trnsys.com

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