[TRNSYS-users] Capacitance in TRNBuild

[Ole Nienaber]

David,
thanks for the advice. But can I take e.g. windows into account with 
these models? Now I model my whole geometric zone with Google SketchUp 
using the Trnsys3d plug-in.
Greets,
Ole

Am 24.02.2015 um 17:51 schrieb David BRADLEY:
> Ole,
>  To add to what Jean Marais said, by including the wall capacitance in 
> the zone and making only resistive walls you are turning Type56 into 
> something resembling a lumped capacitance model and are no longer 
> taking advantage of there being any difference between the air 
> temperature and the surface temperatures. If that is the kind of model 
> that you want to use then there are some actual lumped capacitance 
> building models either as a single zone model the standard library 
> (Type88) or as a multizone model in the TESS Loads and Structures 
> library (Types 759 and 660)
> best,
>  David
>
>
>
> On 2/22/2015 06:01, Ole Nienaber wrote:
>> Dear all,
>>
>> I'm trying to model a building zone in TRNBuild. The store capacity 
>> is specified by 90 Wh/(m²*K). Unfortunately there is no information 
>> about the single store capacities (e.g. walls, furniture,...). Now my 
>> idea was to just model the zone with massless walls and to add the 
>> whole store capacity to the capacity in TRNBuild (normally the wall 
>> capacity is not valued in this parameter). Normally I don't see any 
>> problems regarding to this way of calculation, becauce I only use the 
>> absolute value of the capacity. Do you see any problems in doing this?
>>
>> Thanks and greets,
>> Ole
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>