[BLDG-SIM] Blind control in eQuest

[Dana Troy]

Some of this information you will need to obtain from the manufacturer of the blinds to be installed in the building. 

*	The shading schedule is a multiplier value that effectively reduces the shading coefficient of the window depending on the time of day
*	The maximum solar sch determines when the shade will close based on solar gain. When the solar gain reaches the value in the schedule for that hour, it will close the blind
*	The sun control probability is the likelihood of someone actually closing the blinds when the "triggers" go off. This should never be "1" unless they are automatic blinds with sensors in them. People are not in their office 100 percent of the time and different HVAC systems may cause some people to leave blinds open or close them too soon.
*	The open shade sch is the likelihood of someone opening the blinds when the triggers are reset. Some people might close a blind, turn on the light in their office, then forget to open the blind, even if the sun is on the other side of the building. This again should never be 1 unless there are sensors.
*	Conductance minimum T sch lowers the blinds if the outside air dry bulb temp is below the stated threshold value.
*	Solar Transmittance is used for daylighting, which says how much light is penetrating the blinds. This is determined by the manufacturer of the blinds in the building.

You will have to create some of your own schedules for this, but remember, you have to make a DAY schedule first, then a WEEK schedule, and then an ANNUAL schedule, all with the same name, but with DAY, WEEK, or ANNUAL before it. This helps with continuity and avoids confusion. 
 
I have used shading on a couple of buildings, and both have shown little savings. 
 
Hope this helps,


Dana Troy
Energy Analyst 

 <http://www.glumac.com/>  
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320 SW Washington, Suite 200
Portland, OR 97204-2640
T.  503.227.5280  F. 503.274.7674
D. 503.345.6286

Thinking. Inside the building.
www.glumac.com <http://www.glumac.com/>  
 

-----Original Message-----
From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com]On Behalf Of Kevin Burke
Sent: Wednesday, June 20, 2007 2:58 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Blind control in eQuest



Dear All,

 

I am running a very simple model in eQuest. I would like to control the blind operation based on the solar radiation levels and report its operation in the simulation results document.

 

The set up I have at the moment is defined in the detailed mode, at window level and goes as follows:

 

Shading Schedule:                     Schedule MULTIPLIER

Shading Type:                           Mov  able interior

Maximum Solar Schedule:          Schedule RADIATION                             Max Solar Control: Transmitted Total

Sun Control Probability:              1.0

 

Open shade schedule:                undefined

Conductance min-T schedule:     undefined

Solar Transmittance schedule:    undefined

 

Is this correct? I have tried using something other than Schedule MULTIPLIER in the shading schedule and it doesn't seem to work.

Do I need to define the undefined schedules. The help information is confusing when available.

 

Finally how do I report this information in the simulation results document. Any input would be greatly appreciated.

 

Kind Regards,

 

Kevin Burke

 

 

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