[esp-r] Re: blind control

[Geissler Achim]

Liam,

 

you can change optical properties based on solar incidence on a surface. You need to look in the "transparent surfaces" menu items, somewhere there is "control" and you are asked a few questions. I have found it easier to directly edit the .tmc file, though, as soon as it is basically set up.

 

It would look something like

 

# transparent properties of office_wsw defined in ../zones/office.tmc

   8   # surfaces

# tmc index for each surface

1,0,2,0,0,0,0,0

   5  ip6834_binup # layers in tmc type 1

# Transmission @ 5 angles & visible tr.

   0.311   0.293   0.260   0.184   0.090   0.642

# For each layer absorption @ 5 angles

   0.314   0.327   0.340   0.355   0.344

   0.001   0.001   0.001   0.001   0.001

   0.047   0.050   0.052   0.053   0.052

   0.001   0.001   0.001   0.001   0.001

   0.001   0.001   0.001   0.001   0.001

   1  # optical control flag

   1   1  # no control periods & sensor loc

# Replacement properties for each control period

   0  24   # period start and end 

   0 200.0  # sensing total radiation @ actuation point

# Alt solar & vis trans followed by absorp for each layer

   0.131   0.054   0.045   0.030   0.014   0.274

   0.336   0.360   0.370   0.377   0.355

   0.001   0.001   0.001   0.001   0.001

   0.063   0.074   0.074   0.071   0.063

   0.001   0.001   0.001   0.001   0.001

   0.089   0.104   0.091   0.064   0.031

   0

   1  tran_fictit  # layers in tmc type 2

# Transmission @ 5 angles & visible tr.

   0.999   0.999   0.999   0.999   0.999   0.999

# For each layer absorption @ 5 angles

   0.001   0.001   0.001   0.001   0.001

   0  # optical control flag

 

 

for an insulating glazing unit with blind (modeled as 5-layer TMC - a very coarse approach) switched at 200 W/m2 on surface 1 (you can have two switching periods - i.e. three tmc data sets between which the switching happens, however, we have had reservations on if the "middle" situation is actually ever used) ... hope that helps.

 

Regards,

Achim

 

 

Mit freundlichen Grüssen / Best regards

 

Achim Geissler

________________________________

From: esp-r-bounces at lists.strath.ac.uk [mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Liam O'Brien
Sent: Tuesday, February 26, 2008 10:10 PM
To: esp-r at lists.strath.ac.uk
Subject: [esp-r] blind control

 

Hello All,

I want to model motorized blinds (for now, simple 2-position roller blinds).  I would like to control their position based on current normal solar irradiation, for example.  I tried finding information on how I might approach this, but the most relevant information I found was in the electrochromic exemplar.  However, it wasn't evident to me where the controls information was.  If anyone can point me in the direction of information for the following two concepts, I would be very appreciative:

1)  Where one can actually specify the control scheme and the associated optical properties file in the GUI.  I.e. use optical properties A under X circumstances and optical properties B under Y circumstances

2)  Any other case studies or exemplars for blind control.

Thanks in advance.

Liam O'Brien

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