Radiance material question

grasshopper honeybee-legacy
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1

Hi everyone,

I have two questions:

1- Does anyone know how do to define the Ashikhman Shirley Radiance material mentioned in this paper

http://web.mit.edu/sustainabledesignlab/publications/SpecularGlareP…

2- Where is the HB .rad file located? I prefer to add Radiance materials directly in the .rad file instead of using the add Radiance material component.

Thanks in advance

Rania

Ashikhman Shirley

2

  1. I would email Alstan for that question.

  2. Look for “HoneybeeRadMaterials.mat” in Ladybug’s default folder- You can also use “Honeybee_Add to Radiance Library” component to write your materials to the same file.

3

Hi,

is there a possibility to change the default values for zone-surface?

If i define a material e.g. EXTERIOR_ROOF and add this like described above, the calculation uses the predefined values if i don’t use HB_setRADMaterials and assign the new values.

In Germany we have a directive concerning daylight-factor calculations with fixed values for reflectance, therefore it would be great to define this values as standard for all my calculations…

4

Heiko,

Can you help me to understand why does using setRadMaterials component do not work for you? You can assign any radiance material that you want to the surface.

Mostapha

5

Hi Mostapha,

using setRadMaterials works fine but it would be great if the default values could be defined e.g. with an ini-file. This would allow us to use the standard values from the regulation without assigning them to each zone manually. Not a big deal at all but nevertheless a possible source of error for the users.

Best regards,

Heiko

6

Hi,

Just an idea, may it be worthy that you create your materials with the default reflectances, cluster them and create a user object with it?

Like:

Inside the cluster

Outside the cluster

Julia

2 Likes
7

Hi Julia, A quick note [for advanced users]. A good practice is not to use Glass as the material name. ‘glass’ is the radiance modifier name for transparent material. It will work but it’s just not a good practice.

8

Hi Mostapha,

Thanks for that!

I wrote glass for the example. Usually I use the commercial name of the glass that I’m testing or a simplification like “dbl_glz”.

But I didn’t know that, so I’ve been lucky