Custom material not behaving as expected

Hi everyone,

I tried to make a custom material (for the first time) in order to simulate a blue tinted glass with low visible transmittance. It was successful in that the material showed up in my options, and allowed me to run a simulation. But it seemed to allow more light in than I had expected, so I'm wondering if I did something wrong. I compared results of a material provided with DIVA: "Glazing_70Tvis" and my new material: "Solarban_60_Solarblue+Clear" which has a much lower %tvis. I will attach an image of the same space with glazing using these two materials.

# Glazing: Tau_vis = 0.70;
# visual transmittance: 70%
# visual transmissivity: 76.3%
void glass Glazing_70Tvis
0
0
3 0.763 0.763 0.763

# Solarban_60_Solarblue+Clear: Tau_vis = 0.45; SHGC= 0.28 ; U-Value= 1.36W/m2K
# visual transmittance: 45%
# visual transmissivity: 49.07%
void glass Solarban_60_Solarblue+Clear_45_Tvis
0
0
3 0.4907 0.4907 0.4907

Tags: based, custom, grid, materials

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Attachments:

diva material question.pdf, 336 KB

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Permalink Reply by Maria Grimm on August 10, 2017 at 3:07pm

I'm not 100% sure if this will help - but try taking out the "+" from your custom material - it may not like this character.

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Permalink Reply by J. Alstan Jakubiec on August 11, 2017 at 2:33pm

I agree with Maria, the simulation may be lacking materials entirely if Radiance doesn't parse the plus correctly. After editing the material.rad file, make sure to re-assign materials to that layer.

Best,

Alstan

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Permalink Reply by Michail on March 29, 2018 at 6:50am

Hi AU,

I was wondering if you could guide me through the process of creating custom windows. I would like to create a window with transmittance close to 70%. At the moment, i am using the default windows (transmittance between 65% and 80%) which is not always the best option for me.

Best,

Michail