How to make illuminance data in weather data file being used within EnergyPlus daylight related calculation?

asked 2016-07-13 04:33:09 -0600

wsmj gravatar image

updated 2017-05-04 08:50:44 -0600

I want to use the illuminance data from my real weather data file to do the daylight calculation in EnergyPlus. So far as I know, EnergyPlus does not use illuminance data from weather file directly. All the illuminance values used in simulation process are derived from radiation data.

What should I do to make illuminace data in .epw file being used directly in daylight calculation? Can this be done by recoding some lines in Weathermanager module and/or daylighting modules?

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For what it's worth, EnergyPlus is in C++ now.

__AmirRoth__ gravatar image __AmirRoth__  ( 2016-07-13 10:38:27 -0600 )edit

Just out of interest, why are you so interested in using the illuminance data for a whole building energy simulation? Where'd your "real weather data file" come from? Presumably the radiation data was acquired and not derived(?), and thus would be ideal for all of the calculations, not just the photometric ones.

rpg777 gravatar image rpg777  ( 2016-07-13 13:52:58 -0600 )edit

@__AmirRoth__ Thanks for your correction. I have slightly modified the name form of the module. Is it right now?

wsmj gravatar image wsmj  ( 2016-07-13 23:17:27 -0600 )edit

Dear @rpg777 , I prefer not to explain too much why I find it interested to use measured illuminance data, after all the key of this question is seeking the way to achieve this rather than asking for opinion whether should I do this. Do you have some suggestions on this? For example, is it possible to modify EnergyPlus to directly use illuminance data? and which modules should I modified to achieve this? How much is the estimated work load? Thanks.

wsmj gravatar image wsmj  ( 2016-07-13 23:49:28 -0600 )edit

I was not offering an opinion on whether you should do it, I was merely curious about the rationale. I prefer not to explain too much beyond this. Thanks.

rpg777 gravatar image rpg777  ( 2016-07-14 14:17:35 -0600 )edit