[Equest-users] Switchable glazing based on two criteria

[Stefano Moret]

E+ has some functions to control switchable glazings, for your case I would try the control "OnIfHighOutdoorTempAndHighSolarOnWindow", which seems to fit pretty well to your requirements.

Stefano

--

Stefano Moret
California Lighting Technology Center<http://cltc.ucdavis.edu/>
University of California, Davis
633 Pena Drive
Davis, CA 95618

530-747-3846
smoret at ucdavis.edu<mailto:smoret at ucdavis.edu>

On 10/apr/2012, at 14.49, Deepika wrote:

Hi

Unfortunately equest don't have the capability to use multiple triggers . .
You might want to try this in energy plus





On Apr 10, 2012, at 2:37 PM, Adam Michael Aljets <adama at uw.edu<mailto:adama at uw.edu>> wrote:

Hi all,

I'm having difficulty implementing glazing that switches based on both direct solar incident and temperature. That is, I only want to allow switching when the outside dry bulb is over 60 F, and I want the switch to occur instantaneously when the glazing receives 15.9 BTU/hft^2 direct solar incident radiation. I don't have experience with user expressions/if statements in eQUEST. I've been successful in implementing switchable glazing based only on temperature or only on direct solar incident, but not on both.

I tried something along the lines of this for the window in *.inp, but without success:

  SWITCH-CONTROL   = ({if (#G("DRY-BULB TEMP")>60)
  GLASS-TYPE-SW    = "ECW-switched"
   then "DIR-SOL-INC"
else "NO-SWITCH"
endif})
  SWITCH-SET-LO    = 15.9
  SWITCH-SET-HI    = 15.9

Thanks in advance,

Adam
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