This is the first time I try Dynamic Shading in Honeybee, and please let me know if there were any mistakes in the grasshopper file.
The case is a simple test box: Curtain on the east glazing wall could either be pulled back at the corner as a 2 meter solid surface, or cover the whole glass as a trans material (trans for now, BSDF in the future). The sensor is on the floor next to the glass: when there is direct sunlight, the curtain expands to cover the whole glass. When there is no direct sunlight on the floor sensor, the curtain is pulled back at the corner.
However, I tried to run the simulation based on this setting and other posts in this forum, I can only get the ill results as below, and the resultfiles output of the runDaylightAnalysis component shows NULL.
Any advice on fixing this issue would be much appreciated! I also attached the model and grasshopper file.
For the future test, my understanding is: if we control East Shade and South Shade based on the sensor on each side (east sensor and south sensor), they should be two different Shade Groups? Thanks!
Thanks for your kind help! No the component gave me no errors or warnings. After running the simulation and got the ill files generated, the component shows as below:
So I have the East_Shade_0.ill, East_Shade_state_1_0.ill, and East_Shade_state_2_0.ill, but nothing shows up for annual analysis files or the lookupFolder_Daylighting/illFiles.
Also the shading illuminance thresholds may be odd: The assumption is the shade could either be pulled back at the corner as a 2 meter solid surface (State 1), or cover the whole glass as a trans material (State 2). The sensor is on the floor next to the glass: when there is direct sunlight (more than 10000 lux at sensor), the curtain expands to cover the whole glass. When there is no direct sunlight on the floor sensor (less than 10000 lux at sensor), the curtain is pulled back at the corner.
So I adjusted the DSShadingState as below:
Please let me know if the shading control threshold won’t work this way or any other tests I should run to figure out the problem. Thanks!
Thanks! Yes I checked the lookupfolder_daylighting component, and the output for ill files is null.
I tried to structure the current 3 ill files into data with 3 branches, and connected that to ill files address, I was able to generate an annual profile, however the readDSHourlyResults showed an error “1. Number of annual profiles doesn’t match the number of shading groups! NOTE: If you have no idea what I’m talking about just disconnect the annual Profiles. In that case the component will give you the results with no dynamic shadings.”
I also attached the updated gh file and ill files as below. I don’t know why the components won’t recognize the ill files. Thanks!
It is because your path for the study folder doesnt need to include the annual simulation. You just need the path up the east shade and you specify the study type (for annual simulation, it should be 5 ). Then you just have to refresh it and everything should look great.
Thanks so much! It works! Although I’m not sure why the initial reading annual results component won’t work. Also in your simulation, may I know what is the upper limit for the number of dynamic shading groups that you can have in Daysim? Thanks!
The signal is variable, it based on what you are trying to do. I am not an expert on this subject but the purpose of dynamic shading is blocking excessive direct sunlight. Therefore, you should look some illuminance at a certain hour during the year (winter and summer solstice, 9,12,15 hour) when the spaces receives direct sunlight based on the azimuth angle of the facade. There is some more advanced approach to control the shades is looking at the profile angle and the illuminance value at the same time which I believe could be done through the glarecontrol_recipe.
