we would love to use sunlightHoursAnalysis for the code compliance checking BUT we need to:
analysisPeriod must be 1st March from 7:15 to 16:45. Problem is that analysisPeriod toHour will accept only integer numbers from 1 to 24 thus it is not possible to define fractional time such as 7.25 to 16.75 despite the fact that timeStep can be down to 1 minute (timeStep = 60).
sunlighHoursAnalysis must be constrained in the way of excluding sun azimuth angle of 25o of the facade face. Or in other words any sun visible in the sector of 25o of the analysis surface plane must be disregarded (sun directions close to analysis surface parallel (till 25o) are disregarded).
We believe that this could be achieved by some changes to the source code. Is there anybody that would take on this consultancy job for us?
The easy way is to use the [+] libraries which gives you a better control on hours using hoy input but you can also make this work using the legacy component. Since you want to run the analysis for a single day you can directly generate the hours can connect them to sunpath.
Now you can run the sunlight hours study and use testVector and isSunVisible outputs to pick the sun vectors that meets the angle criteria for each test point. Finally you can use recolor mesh to color the input meshes based on the final results.
thank you very much for your help. I can see that “recolor mesh” is reporting actually number of how many times is sun visible BUT not the sun access hours.
I do assume that some more calculation needs to be done to convert is sun visible hits to hours based on given time step e.g. in your example script this would be - one hit = 15 minutes.
We are going to use 1 min time step so in our case it is simple 1 hit = 1 minute?
You are right. I made a mistake and removed the vectors that where perpendicular to surface instead of the ones that are parallel to surface. The real cutting angle is (90 - 25) 65 degrees. I don’t get the exact value as you mentioned above but close. Am I using the correct location from weather file? You can create your own custom location using component.
Here is the updated file with some visualization. I run the study for a single point. Make sure to remove the visualization and adjust the grid size for your study.
We have a wee misunderstanding about cutting angle. This should not be direct angle between 2 vectors (surface normal and sun vector as shown in your graphics) but its projection angle into XY plane or in other words it must be azimuth angle.
So for example your direct angle between 2 vectors is 65.1 BUT this will not correspond to the same azimuth angle in XY plane between surface normal azimuth angle and sun azimuth angle.
You’re welcome. I’m still not sure how do you deal with roofs? Just remove them from the study?
It’s like any other daylight studies. Find a daylight factor study and replace the recipe with VSC recipe and there you have it. If you have any other questions please open a new topic.
component.
