Unmet Hours

OS - Shading control: multiple strategies?

asked 2016-05-25 17:44:38 -0600

LucasL

63 ●3

updated 2016-05-25 21:05:04 -0600

__AmirRoth__

4446 ●5 ●17 http://bleedinggreenna...

Hi all,

I'm working with OpenStudio and I know that I can add shading control strategies for windows, for example when incident radiation reaches certain value. Now, how could I combine this strategy with another one to completely close an interior blind (or blackout) during sleep hours on a bedroom (this one would work with a schedulle)?

I know I can do one or the other but... how to set up both strategies for the same windows simultaneously? I already tried to drag two shading controls on the same sub-surface but the second replaces the first.

Thanks for the advice!

Comments

have you tried EMS in EnergyPlus?

Waseem ( 2016-05-26 00:59:58 -0600 )edit

Mmmm.. noup yet. I'm pretty new to EnergyPlus. I'll look for references though. Thanks!

LucasL ( 2016-05-26 12:42:13 -0600 )edit

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answered 2016-05-27 10:32:26 -0600

David Goldwasser

20405 ●94 ●14 http://www.openstudio.net/

updated 2016-05-27 10:38:18 -0600

While OpenStudio only directly supports 4 shading control types (AlwaysOn, AlwaysOff, OnIfScheduleAllows, and OnIfHighSolarOnWindow) EnergyPlus offers many more options. They are described here under Field:Shading Control Type .

Here is an example of one of the options that might work for you. You could create simple EnergyPlus measure to find "ShadingControl" objects and change the "Shading Control Type" to whatever you want.

OnNightAndOnDayIfCoolingAndHighSolarOnWindow: Shading is on at night. Shading is on during the day if the solar radiation incident on the window exceeds SetPoint (W/m22) and if the zone cooling rate in the previous timestep is non-zero. Day and night shading is subject to schedule, if specified.

There are five additional variations of OnNight..... options that are controlled by daylight, temperatures, and/or HVAC mode.

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Comments

Thank you very much David. That sounds logical to me. The only thing is that I would need to dig a bit more and start learning some ruby first. Nevertheless, there is an example in the E+ manual that could be adapted to this case under the shading section.

LucasL ( 2016-05-30 21:44:35 -0600 )edit

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