[TRNSYS-users] Type 56 window fraction

[David BRADLEY]

TRNBuild does not have a method for specifying a glazing fraction per 
orientation. Typically you would draw your windows in SketchUp along 
with the rest of the building's geometry.

I would hesitate to recommend a % glazing factor for a greenhouse; there 
are a lot of variables that come into play. In northern climate 
greenhouses for example, you often see an insulated or even earth bermed 
north wall and you have to balance the glazing area between getting 
enough light to the plants and not losing too much heat at night. In hot 
climate greenhouses then cooling is the bigger challenge and that might 
direct you towards a different amount of glazing.

When in doubt, test the simulation's sensitivity to the design variable. 
Try some simulations with a range of glazing fractions!

kind regards,

  David


On 02/07/2022 04:01, Zeynep Özcan via TRNSYS-users wrote:
> Dear Trnsys users,
> I am working with a type 56 building model for a greenhouse, is there 
> a specific ratio or a constant value for the fraction of windows in 
> external walls (%) for each orientation? I do not have a specific 
> window area value, so for example is 0.95 (%) suitable for greenhouse 
> modelling? Do you have any suggestions?
> Kind regards,
> Zeynep Ozcan
>
>
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> TRNSYS-users at lists.onebuilding.org
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-- 
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com
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