Adding new glass(PE-PVC-PC-PMMA)

[Sadki Amine]

Hi everyone,

I'm trying to add new glass to the WINDOW software library for TRNSYS greenhouse project, but I have a problem: I don't have the complete spectral data for it. I only have the data shown in the picture i've attached.

I'm not sure how to add this new layer with my available data in Optics so i can have the spectral data. Does anyone have any ideas or suggestions on how to handle this?

Best,
Amine

[Robin Mitchell]

You might want to group the records in Optics by the Material field (just drag that field to the upper left of the table, and drag the default fields down into the table to get rid of them), as there are some Acrylic and PET layers there. Maybe you can find something that is similar enough to what you need. 

Robin

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Robin Mitchell

Building Technology and Urban Systems Division
Energy Technologies Area
Lawrence Berkeley National Laboratory

[Jacob C. Jonsson]

Dear Amine,

Without knowing what kind of results you are trying
to achieve we can only guess at your best cause of action.

I agree with Robin that your best bet is to look at the
existing generic polycarbonate and acrylic records and
using those instead.

In optics you can see how the thickness impacts the
properties and maybe use that to emulate the materials
that are not in the IGDB by selecting a thinner or thicker
material from those

If you need really exact results for multi-layer calculations
with other polymer materials you would need to go to the
source of the integrated data you showed and ask them for
spectral data, googling for spectral data might give you
something as well that you could format in a way that
can be imported into Optics.

More expensive and time-consuming would be to obtain physical
samples to send to a test lab to have measured. But it is
not impossible that those samples will end up having slightly
different results compared to the ones in your table.

Best,
Jacob

> On Tue, May 27, 2025 at 12:00 PM Sadki Amine <lhsenn...@gmail.com
> <mailto:lhsenn...@gmail.com>> wrote:
>
> Hi everyone,
>

> I'm trying to add new glass to the *WINDOW software library for
> TRNSYS greenhouse project*, but I have a problem: I don't have the

> complete spectral data for it. I only have the data shown in the
> picture i've attached.
>
> I'm not sure how to add this new layer with my available data in

> *Optics so i can have the spectral data*. Does anyone have any ideas