Grasshopper

algorithmic modeling for Rhino

Does EPW file take daylight savings time into consideration?

Hi,

I am using honeybee radiance for a daylight study. I generated a clear sunny sky from the epw file. I need to know if the epw file takes daylight savings time into consideration? If not how should I account for it.

Thanks,

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1. No. You can adjust the input hour yourself.

2. Sunny sky is not a climate-based sky. It's a standard sky. It only uses the location data from the weather file. If you want to use the values from the weather file then you should use the climate-based sky instead of CIE skies.

Hi Mostapha,
Thanks for your response. Do you mean e.g. if you want the study for 3pm UTC summer in Chicago, just run simulation for 2pm summer to account for the 1 hour daylight savings time difference?

Also if I understand clearly, the sunny sky is the worst case scenario then as it is not considering any cloud cover etc.

Thanks again for all your help.

Hi Ibby,

1. Yes.

2. Check this document to learn more about the skies and / or search for "CIE Sunny Sky Radiance".

Thanks,

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