[Equest-users] Switchable glazing based on two criteria

Deepika deepika.khowal at gmail.com
Tue Apr 10 14:49:39 PDT 2012


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> 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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