Hello,
We have to simulate “daylighting controls” for a space with skylights and side-lighting.
I am using HAP 5.11 to make the energy simulation, which will need an exceptional calculation to recreate daylight, with the following characteristics:
- Adjust Interior Lighting Schedules: the schedule will be adjusted to reflect the time shift associated with daylight savings time.
To do this, we have search for a sun path simulator, that brings, for each hour of the day, for each day of the year, and for the geographical location of the building:
- Solar Noon.
- Sunrise.
- Sunset.
- Day Length.
With this spreadsheet we can assign a percentage of daylighting from sunrise to sunset, and use it to adjust the interior lighting schedule.
Since the space is non conditioned wharehouse, we do not need to make any other adjustments, just for the interior lighting controls.
The questions are:
- Is this approach correct?.
- The website we have used is: https://andrewmarsh.com/apps/staging/sunpath3d.html,Is this accepted by USGBC?
Thank you for your advice.
Tyler Thumma
7GroupLEEDuser Expert
61 thumbs up
May 7, 2024 - 8:28 am
Your approach appears to only account for the amount of daylight available outside of the building, which does not always translate to effective daylighting within the building. This would require software that can simulate the building geometry, including windows and skylights, along with the project's location and orientation, to determine how well the various spaces in the building can be effectively illuminated through daylighting throughout the year. LightStanza is one example of this type of software that we use. Then the results of this simulation can be used to create an adjusted lighting schedule to simulate any automatic daylighting controls within the building.
Paula Hernandez
MRS.PAH&A
84 thumbs up
May 10, 2024 - 7:05 am
Thank yoy Tyler, we will try this software.