Re: [TRNSYS-users] Type 56 building template for greenhouses

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

Knut Erik
> Did your greenhouse consist of just a single Type 56 zone, or several?
> Maybe two zones: One for the main compartment and one for the top
> compartment?
>   
our model had two zones - one below and one above. In our greenhouse, 
there was a controlled horizontal shade that got pulled across just 
above the plants if they got too hot. We used CONTAM coupled with TRNSYS 
to determine the air exchange between the two (CONTAM is quite similar 
to COMIS)
> How did you define the walls? I have tried to define very thin walls with
> huge windows, but have problems with the timebase because the walls are so
> lightweight. Do you think I can use a massless wall?
>   
I think you could probably just ignore the walls completely unless they 
make a significant thermal bridge. If they do, then I would just treat 
them as massless.
> Also, did you use one huge window for each wall or many smaller windows?
>   
I treated it as one big window because that is how the greenhouse was 
set up in my case. If the actual greenhouse is a lot of windows, then 
thermally, there isn't much difference as long as you take care to set 
the framing factor correctly in the window Typemanager.

Kind regards,
David

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