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how to get hourly irradiance level for each PV surface in EnergyPlus?

asked 2017-12-19 07:03:22 -0500

oat gravatar image

updated 2017-12-20 11:16:41 -0500

I want to compare hourly irradiance level of each PV surface as simulated in EnergyPlus with that in Radiance.

May ask if there is a output variable which reports hourly irradiance level for each shading surface specified as PV panel?

Or is hourly irradiance level of a given PV surface = hourly AC electricity generated by the PV surface / Cell efficiency / PV surface area ?

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answered 2017-12-19 08:25:36 -0500

Avi gravatar image

updated 2017-12-19 08:26:29 -0500

I think that the data you need is available for outside face of any surface. This is a list from my model's .rdd file:

Output:Variable,*,Surface Outside Normal Azimuth Angle,hourly; !- Zone Average [deg]
Output:Variable,*,Surface Outside Face Sunlit Area,hourly; !- Zone Average [m2]
Output:Variable,*,Surface Outside Face Sunlit Fraction,hourly; !- Zone Average []
Output:Variable,*,Surface Outside Face Incident Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Outside Face Incident Beam Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Outside Face Incident Sky Diffuse Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Outside Face Incident Ground Diffuse Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Outside Face Beam Solar Incident Angle Cosine Value,hourly; !- Zone Average []
Output:Variable,*,Surface Outside Face Incident Sky Diffuse Ground Reflected Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Outside Face Incident Sky Diffuse Surface Reflected Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Outside Face Incident Beam To Beam Surface Reflected Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Outside Face Incident Beam To Diffuse Surface Reflected Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Outside Face Incident Beam To Diffuse Ground Reflected Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]
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Thanks, Avi. I thought these variables are for "zone surface" only.

oat gravatar image oat  ( 2017-12-19 09:59:28 -0500 )edit
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answered 2017-12-19 08:20:26 -0500

You can report the Surface Outside Face Incident Solar Radiation Rate per Area output variable.

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Thanks, Adambgnr, for your kind advice.

oat gravatar image oat  ( 2017-12-19 09:59:54 -0500 )edit

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Asked: 2017-12-19 07:03:22 -0500

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Last updated: Dec 19 '17