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Simple shading control in EnergyPlus

asked 2015-12-21 09:15:21 -0500

gerald gravatar image

updated 2017-05-17 12:25:46 -0500

I want to model a simple shading control (input 0-1) - what would be a proper way to implement this in EnergyPlus: Do I need an object: WindowProperty: Shading Control? If so, it is possible to implement this without a "shading-layer"? Regarding shadingType: Are there differencens in the results If i use Interior/Exterior shades/blindes/screens? Thank you very much for your help

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answered 2015-12-21 10:36:22 -0500

You can look over the Shading Surfaces section of the Input/Output Reference for more info, but to give short answers to your questions:

NOTE: This object DOES NOT interact with the FenestrationSurface:Detailed object to model complex windows. You can define your window using individual glazing and gas material layers in a normal Construction object, model simple windows, or use EMS variables to control shades if you must keep the complex windows.

NOTE: The shading control will be applied to ALL windows with the construction you enter. If you only want want to implement shading control on specific windows, or look at different shading control strategies (setpoints, schedules, blind placement, etc.) across multiple windows in the same simulation, you will need to create multiple window constructions in your model.

  • Yes, you should see different results based on shading device placement and type. The shading device will still block direct light penetration through windows depending upon transmittance, but exterior devices will block solar radiation gains on the exterior window surface while interior devices will not. Also, there are some subtle differences between shades / blinds / and screens in EnergyPlus. For example, shades are perfect diffusers while reflective properties of blinds vary according to solar angle of incidence. The impacts these options have will depend upon your model (building use, location, operation schedule, etc.), so you'll have to test them out to see what impacts they have.
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Asked: 2015-12-21 09:15:21 -0500

Seen: 1,684 times

Last updated: Dec 21 '15