[TRNSYS-users] Convective heat transfer coefficients of a "large opening" between zones

[Erik Olsen]

Hi Knut Erik

It looks like this is the main question remaining on your greenhouse 
simulation.

I would set convection coefficients to zero (or a very small number if 
zero isn't accepted), and us a separate method to define the air 
exchange between the two zones with a coupling when the screen is open.  
The  large direct air exchange between the zones renders any convection 
coefficient meaningless.

Regards
Erik

knut.erik.enerstvedt at niva.no wrote:
>
> Hello,
>
> I have an ADJACENT window (with shading) between two Type 56 zones to 
> model a controlled screen which can be either pulled across or pulled 
> away. Does anybody know what the convective heat transfer coefficients 
> of the window should be when the screen is pulled away (that is, when 
> the window is "gone" and there is just a large opening between the 
> zones)?
>
> All help is higly appreciated.
>
> Regards,
> Knut Erik Enerstvedt
> ------------------------------------------------------------------------------------------------------------
> Meld deg på vårt nyhetsbrev på www.niva.no 
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