Hi All

Let me know how can analyzing the Glare with Diva daylight components.

Peace

Shahab 

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Hi Shahab,

The following two links are probably of interest for you. Let us know if you have any further questions.

http://diva4rhino.com/user-guide/simulation-types/point-in-time-glare

http://diva4rhino.com/user-guide/simulation-types/annual-glare

Best,

Alstan

Hi Alstan

I need connection my modeling to DIVA in Grasshopper. Thanks for send two links, but that are talking about get simulation whit DIVA in Rhino, is not for Grasshopper.Let me know can I simulate Glare just with DIVA  in Grasshopper??

Thanks

Shahab 
 
J. Alstan Jakubiec said:

Hi Shahab,

The following two links are probably of interest for you. Let us know if you have any further questions.

http://diva4rhino.com/user-guide/simulation-types/point-in-time-glare

http://diva4rhino.com/user-guide/simulation-types/annual-glare

Best,

Alstan

You could just bake the geometry.....!

Yes, but then you leave the parametric environment. Is there a reason why an annual glare simulation is not possible from grasshopper? I am running simulations for different types of shading (in- /exterior screens and blinds). I guess there is not a possibility to address these shading types as dynamic, without the AGP simulation.

Best,

Douwe

Hi Douwe,

The annual glare calculations can be very time consuming. For a very simple geometry they may take 2-3 hours, but for something very complex it is more likely to take 12-24. I'm not a developer for the DIVA-Grasshopper components, but it seems reasonable that fine-grained parametric analysis might not be useful considering annual glare.

If you are individually testing several explicit shading geometries, you can run them from the DIVA toolbar, and even parallelize your efforts by having multiple Rhino files open if you wish.

Hope that is helpful.

Best,
Alstan

Hi Alstan,

Thanks for the quick response. Although the simulation time for the AGP calculation is very time consuming, without it you cannot say something valid about the climate-based simulations (DA and UDI in my situation) when dynamics shading is used. I can either simulate the open or closed state, but which percentage represents each state? In fact, this influences the thermal simulation as well, by as well addressing the shading as static and as the lighting loads are incorrect (actually correct, but representing the wrong values).

I built a configuration system for assembling and evaluating an (intelligent) façade system. The system first calculates a solution-set according to the user’s needs & constraints. Next, this solution-set is send to the grasshopper environment where it is modelled, and fed to the diva-for-grasshopper components. By linking excel sheets (TTtoolbox) to the grasshopper script, I can simulate from the user-interface (and retrieve results). Therefore, I was hoping for a possibility or remain in de GH script.

However, as the orientation, function and the dimensions of the room are independent variables, it would be possible run the annual glare calculation for the scene without shading in Rhinoceros. From this simulation data, is it possible to extract a probability year occupation percentage, by which I can predict open and closed state of (e.g.) the screens?

Thanks in advance, I really appreciate your help!

Bye,

Douwe

Hi Douwe,

Although the simulation time for the AGP calculation is very time consuming, without it you cannot say something valid about the climate-based simulations (DA and UDI in my situation) when dynamics shading is used. I can either simulate the open or closed state, but which percentage represents each state? In fact, this influences the thermal simulation as well, by as well addressing the shading as static and as the lighting loads are incorrect (actually correct, but representing the wrong values).

That is a pretty reasonable view, and I happen to agree with you. All of the changes that came with DIVA 2.0 (paper) pretty much align with that viewpoint. You can run an annual DGP calculation, which can influence the daylight availability and shading / lighting schedules and in turn influence DIVA-Thermal simulations or any other external thermal simulation which takes CSV files as schedule inputs. 

However, as the orientation, function and the dimensions of the room are independent variables, it would be possible run the annual glare calculation for the scene without shading in Rhinoceros. From this simulation data, is it possible to extract a probability year occupation percentage, by which I can predict open and closed state of (e.g.) the screens?

Let me answer this question by explaining what the DIVA toolbar does via Daysim. If you have an advanced shading system setup in DIVA, the annual DGP simulation will create an annual result for each state of the shading system (plus an unshaded state). It can use this data to predict when occupants will adjust the shades to maintain comfort. If your shades only have up/down states, you can simulate the unshaded annual DGP for each orientation / room dimension and use it as an input to your model. I would also suggest that it might be worthwhile to check that your shading systems do solve the glare problem when they are 'down'.

Best,

Alstan

Hi Alstan,

Thank you very much for the clarification and thinking along. I'll let you know how it worked out.

Bye,

Douwe

J. Alstan Jakubiec said:

Hi Douwe,

Although the simulation time for the AGP calculation is very time consuming, without it you cannot say something valid about the climate-based simulations (DA and UDI in my situation) when dynamics shading is used. I can either simulate the open or closed state, but which percentage represents each state? In fact, this influences the thermal simulation as well, by as well addressing the shading as static and as the lighting loads are incorrect (actually correct, but representing the wrong values).

That is a pretty reasonable view, and I happen to agree with you. All of the changes that came with DIVA 2.0 (paper) pretty much align with that viewpoint. You can run an annual DGP calculation, which can influence the daylight availability and shading / lighting schedules and in turn influence DIVA-Thermal simulations or any other external thermal simulation which takes CSV files as schedule inputs. 

However, as the orientation, function and the dimensions of the room are independent variables, it would be possible run the annual glare calculation for the scene without shading in Rhinoceros. From this simulation data, is it possible to extract a probability year occupation percentage, by which I can predict open and closed state of (e.g.) the screens?

Let me answer this question by explaining what the DIVA toolbar does via Daysim. If you have an advanced shading system setup in DIVA, the annual DGP simulation will create an annual result for each state of the shading system (plus an unshaded state). It can use this data to predict when occupants will adjust the shades to maintain comfort. If your shades only have up/down states, you can simulate the unshaded annual DGP for each orientation / room dimension and use it as an input to your model. I would also suggest that it might be worthwhile to check that your shading systems do solve the glare problem when they are 'down'.

Best,

Alstan

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