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Re: [TRNSYS-users] When I set 1st gournd floor as boundry, what should I set these parameters?



The principals of those parameters are always the same regardless of what category surface you are dealing with. I would highly recommend that you refer to the TRNBuild/Type56 manual in order to understand them fully.

"geosurf" has to do with the way that beam solar radiation is apportioned to the surfaces of the zone/airnode.

" surf. gain inside" is a simplified way of simulating a radiantly heated or cooled surface.

"coupling air flow" and "coupling rel. hum." have to do with the conditions (temperature, humidity, and flow rate of air that may be passing through the surface). For a ground floor, there probably would not be air coming through the surface.

"boundary condition" is a switch that allows you to either set a boundary condition (such as the ground/floor interface temperature) or to tell Type56 that the conditions on the back side of the boundary is the same as the conditions on the font side (i.e. that there is an adiabatic surface in the wall/floor/ceiling.

kind regards,

 David


On 07/14/2022 22:36, H via TRNSYS-users wrote:
Dear all, 
      I have a question.  When I set 1st gournd floor,  what category should I set ( external or boundry) and then what should I set these parameters ?

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David BRADLEY
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Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
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d.bradley@tess-inc.com

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