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There are three methods dealing with rainfall/liquid precipitation in EnergyPlus:
liquid precipitation amounts on the epw files (for older files, uses present weather and a set of 3mm - as I remember)
Site:Precipitation object
RoofIrrigation (for Ecoroof). - Irrigation is not exactly rainfall but perhaps should be integrated.
Site:Precipitation is used in the WaterUse:RainCollector object (that is the precipitation feeds that object).
Site:Precipitation is also used in Material:RoofVegetation (but Material:RoofVegetation does not use precip from the epw file if these is not Site:Precipitation object) MJW 17 Feb 2022
Liq Precip on the weather file currently only sets the "israining" flag which, in turn, changes the convection coefficient (outside) if the surface is wet. is not used for anything. (see below.)
Suggestion is that these should be integrated.
Possibly, the Site:Precipitation object will be more detailed than amounts from the hourly weather file. Ergo, perhaps the Site:Precipitation values should override any values from the weather file. On the other hand, if there is no Site:Precipitation object, then values from the weather file should feed the WaterUse:RainCollector object. Not sure where the RoofIrrigation object fits into the scheme of things.
The text was updated successfully, but these errors were encountered:
As of this commit in April 2012, the liquid precipitation amounts in the epw file are not use for anything. Code was researched in response to Unmethours 33199.
There are three methods dealing with rainfall/liquid precipitation in EnergyPlus:
Site:Precipitation is used in the WaterUse:RainCollector object (that is the precipitation feeds that object).
Site:Precipitation is also used in Material:RoofVegetation (but Material:RoofVegetation does not use precip from the epw file if these is not Site:Precipitation object) MJW 17 Feb 2022
Liq Precip on the weather file
currently only sets the "israining" flag which, in turn, changes the convection coefficient (outside) if the surface is wet.is not used for anything. (see below.)Suggestion is that these should be integrated.
Possibly, the Site:Precipitation object will be more detailed than amounts from the hourly weather file. Ergo, perhaps the Site:Precipitation values should override any values from the weather file. On the other hand, if there is no Site:Precipitation object, then values from the weather file should feed the WaterUse:RainCollector object. Not sure where the RoofIrrigation object fits into the scheme of things.
The text was updated successfully, but these errors were encountered: