how to set up this kind of model

Hi all,

I am wondering how should I set up this kind of model for daylight analysis. I guess it should be multiple zones joined at the end. I tried to union it in rhino, but the resulting brep could not be used as a zone. Also, I have a vertical wall for light bouncing, I am not sure how to include it into analysis.

Also I would like to ask if it is possible to get analysed grid as a curved surface, rather than flat plane.

Regards,

Petar

Attachments:

prob.jpg, 121 KB

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Permalink Reply by Mostapha Sadeghipour Roudsari on March 12, 2014 at 10:36am

Hi Petar,

You don't need to create a zone for this case (however you can). Just use createHBSrfs component and assign the materials to the surfaces (or leave the material input empty if you want to use generic materials). The same goes to the vertical wall.

Back to the second question, you can generate the test points from any surface or mesh. All you need as the input is a list of points and vectors that indicates points direction.

Nevertheless, this looks like a great case that I can use to record a tutorial on how you can prepare a model with Honeybee for daylight simulation. If you provide more information here (such as the model itself and material properties) I can capture the video tomorrow evening and post it on YouTube.

Mostapha

Permalink Reply by Petar Pejic on March 12, 2014 at 11:03am

Dear Mostapha,

thank you for your kind reply.

I will be more than happy to provide a model for your demonstration. However, the whole structure is much bigger (around 200x80m) with multiple openings, maybe I could reduce it to half for this purpose. Also, the bottom plane (subject of analysis) is a curved surface, so this could be useful as well. Regarding the material properties, I think a couple of simple material could be used. It would be highly appreciated if you could demonstrate the influence of ' amount of reflection' of base surface on overall result (for example, the amount of reflection of walls).

PM me for the model details.

Regards,

Petar

Permalink Reply by Mostapha Sadeghipour Roudsari on March 12, 2014 at 5:25pm

Hi Pitar, Sounds good. I think I will just generate something similar to your test model for this case. I will make sure to talk about materials too. I will update this discussion when I posted the video. Cheers, -Mostapha

Permalink Reply by Petar Pejic on March 13, 2014 at 5:30am

Thank you for your effort Mostapha

Permalink Reply by Petar Pejic on March 15, 2014 at 11:08am

Hi Mostapha, could you roughly let us know when can be expect the new video?

Permalink Reply by Mostapha Sadeghipour Roudsari on March 15, 2014 at 7:53pm

Hi Petar, I will do it in few hours. Will let you know

Permalink Reply by Mostapha Sadeghipour Roudsari on March 15, 2014 at 10:52pm

Hi Petar, Check the attached file. It is so late right now to capture a video. I will try to do it tomorrow. The file should be good enough to get you started. -Mostapha

Attachments:

sampleFile_DF.gh, 124 KB

Permalink Reply by Petar Pejic on March 17, 2014 at 8:35am

Dear Mostapha,

Thank you for the example file, I hope it will be useful. Anyway, no need to rush, I was just asking roughly time, feel free to do it when it suits you the most. You have already provided so much to the community.

Regards,

Petar

Permalink Reply by Petar Pejic on March 18, 2014 at 9:32am

Mostapha, let me ask you few practical questions:

For daylight analysis, it is important to use the skylight and not direct sunlight?

Is is possible to visualize the sky which is used for analysis?

How many light bounces are used (or should be used) for daylight analysis? (Since I have seen you can change rad analysis parameters)

I hope this questions are not too banal.

Regards,

Petar

Permalink Reply by Mostapha Sadeghipour Roudsari on March 18, 2014 at 7:32pm

Very very good questions Petar. Good to see that Honeybee has users like you.

1. It is up to you as a designer to make the decision about using skylight vs direct sunlight or mix of them. It is about the space that you are designing and your design intent. Just think about an atrium vs a museum. And now think of the atrium in two different climate zones. As a [lighting] designer you make the decision on how do you want the space to be, how the climate is and then try to take advantage of skylight and/or direct sunlight to achieve your design goals.

2. Yes. There is a watchTheSky component next to sky types which let you visualize the sky. There is also an example file that you can check.

3. This one again depends on your model. For your model I would suggest a minimum number of 4 for your final analysis. -ab is only one of the parameters. Check this slides by John Mardaljevic if you want to have a better understanding of radiance parameters and their effect on the results.

I also added the link to "Tutorial on the Use of Daysim Simulations for Sustainable Design" by Christoph Reinhart to teaching materials. I encourage you to at least read chapters 1 and 2 of the tutorial. Check pages 25 and 27 have two examples about selecting the parameters.

Great questions. Keep them coming.

Mostapha

Permalink Reply by Mostapha Sadeghipour Roudsari on March 18, 2014 at 7:32pm

Very very good questions Petar. Good to see that Honeybee has users like you.

2. Yes. There is a watchTheSky component next to sky types which let you visualize the sky. There is also an example file that you can check.

Great questions. Keep them coming.

Mostapha

Permalink Reply by Petar Pejic on March 18, 2014 at 1:49pm

Also, what the is the value of relfctance value of opaque material. is it multiplied by 100 and translated into percentage?