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How to specify radiation flux for surface?

asked 2020-07-17 11:56:21 -0600

MZhan's avatar

updated 2020-07-17 12:46:54 -0600

Dear all,

I am trying to change the outside boundary condition of building surface, namely control the solar radiation flux (W/m2). I looked into .edd file and found an actuator to change the outside air dry bulb temperature for specific surface, however could not find any similar actuator to change the solar radiation.

How to control the outside solar radiation flux for specific surface? If not possible, how can I achieve similar effect for a surface with or without fenestration?

Any advice would be highly appreciated! Thank you in advance!

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answered 2020-07-17 12:45:21 -0600

updated 2020-07-17 12:46:23 -0600

No -- you cannot use EMS to specify solar radiation flux for a surface because that actuator does not exist. The closest you can get is either customizing the EPW weather file that you are using, or using EMS to update the Surface Property Solar Absorptance actuator. As this post mentions and demonstrates, you can also use EMS to update the environment diffuse and direct solar gains, but that is not specific to a surface.

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Dear Aaron, thank you for your answer!

MZhan's avatar MZhan  ( 2020-07-17 21:24:29 -0600 )edit

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Asked: 2020-07-17 11:56:21 -0600

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Last updated: Jul 17 '20