[Radiance-general] Trans material - single pane of polycarbonate

[Erika Saretta]

HI!

 

I am trying to model a panel of polycarbonate (modeled as a surface facing
the sun). 

My goal is to determine the annual solar radiation behind it.

 

Since I have the following values:

-          Transmission 71%

-          Haze 66%

I am trying to model the polycarbonate as a "trans" material in Radiance.

 

Then, I perform the radiation analysis (I use DIVA4RHINO and Daysim model)
with the following parameters for the trans material:

 

void trans polycarbonate

0

0

7 0.972 0.902 0.835 0.07 0 0.706 0.344 

 

But. I obtain very low radiation values (from 30% to 50% of radiation loss).


Does this loss seem unreal as a result?

Do you think that "trans" material is the right choice for the
polycarbonate? 

 

Any suggestion?

 

Thank you in advance

 

Erika

 

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