[TRNSYS-users] Nigh time spray radiant cooling

[David Bradley]

Patrick,
  I would think that the correct way of going about it (in TRNSYS) would 
be to write a model of the wetted outermost layer of the roof to take 
into account the evaporation, convection, and radiation that occurs at 
all times (night or day) and then couple it to a BOUNDARY wall (that 
models the remaining roof layers) . We've used the concept in the past 
to model PCM wall materials and to model ground coupling.
Best,
 David
 

Patrick Wilkinson wrote:
>
> *Has anyone modeled a nighttime radiation cooling system, where the 
> water is sprayed directly on the rooftop of the building, not through 
> tubing/flat plate collectors? If so, any ideas on how to model this in 
> TRNSYS/Excel?*
>
> * *
>
> *Any information on the theoretical background would also help. I can 
> only seem to find information regarding closed systems.*
>
> * *
>
> *thanks*
>
> Patrick Wilkinson, P.E., LEED^® AP
> Advanced Technology Group
>
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>
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> Sherman Oaks, CA 91423
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> www.ibece.com
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