Re: [TRNSYS-users] active layer

[David Bradley <bradley@tess-inc.com>]

Filippo,
   I have gotten similar messages when I was working with
active layers. The first thing I would make sure of is that you are using
the latest version of TRNSYS and TRNBuild (16.01.xxxx). Second, the
minimum flow rate is a minimum specific flow rate (per unit floor area).
Once you set your minimum desired flow rate, click the
"autosegment" button and if the flow rate that you specified is
lower than is allowed by the floor size, the floor will automatically be
broken up into smaller segments that are internally attached in
series.
Kind regards,
 David
 

At 09:29 2/5/2007, Filippo Busato wrote:
> Hi everbody!
>
> I have a question concerning the active layer. While I was trying to
> implement active layers in a building structure, compiling the .bui file
> I got the following message:
>
> "The min. desired inlet mass flowrate is smaller than the min.
> allowed inlet mass flowrate.
> You may use autosegmentation
> MinflowCalc=11.0326
> MFLOWMIN=10"
>
> I thought MFLOWMIN was calculated from the piping features (diameter,
> length), in order to avoid transition to laminar flow, as it sounded
> reasonable, is it correct?
>
>
>
>
> So I tried to change the MinflowCalc from 10 to 11 in the specification
> window of the surface in the building model (TRNBUILD).
> Then, when I compile it the second time I get the same message:
>
> "The min. desired inlet mass flowrate is smaller than the min.
> allowed omòet mass flowrate.
> You may use autosegmentation
> MinflowCalc=11.05...
> MFLOWMIN=11"
>
> What do MFLOWMIN and MinflowCalc mean? Does MinflowCalc depend only on
> geometrical features?
> Can anyone help me in setting these features correcly?
>
>
> Thank you in advance
> Filippo.
>
> -- 
>
> ------------------------------------------------------------------------------------------
> Filippo Busato - Ph.D.
> ingegnere
>
> Università degli Studi di Padova 
> Dipartimento di Tecnica e Gestione dei sistemi industriali 
> Str.lla S.Nicola, 3 - 36100 Vicenza (VI) 
>
> mailto: busato@gest.unipd.it
> homepage:
>
> http://www.gest.unipd.it/~busato 
>
> skype: foucault76
> tel: +39 0444 998778 
> fax: +39 0444 998884 
> mob: +39 347 1207174 
> ------------------------------------------------------------------------------------------
>  
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