[Equest-users] Design Light Levels

[Carol Gardner]

Hi Arpan,

Somewhere it says that if you think you might want to look at daylighting,
always check the yes box in the Wizard. Then you will have all the input
lines you need. If Jeremy's instructions aren't enough, and you know how to
input an .inp deck, then open yours in Wordpad or Notepad and add this
string to each space you want to study daylighting in: Pleas note: the
numbers are DOE2 defaults and might not match what you want. Also, they were
located after the LOCATION = .. line in my .inp deck. Probably doesn't
matter, but hey...

   DAYLIGHTING      = YES

   LIGHT-REF-POINT1 = ( 39.9, 10, 2.5 )

   ZONE-FRACTION1   = 0.399

   LIGHT-SET-POINT1 = 50

   LTG-CTRL-METHOD1 = DefaultOrSpecified

   VIEW-AZIMUTH     = 90

Carol

On Thu, Apr 21, 2011 at 8:25 AM, Jeremy Poling <
Jeremy.Poling at transwestern.net> wrote:

> From the help file:
>
>
> LIGHT-SET-POINT1, LIGHT-SET-POINT2
>
> Give the desired illuminance level at LIGHT-REF-POINT1 and
> LIGHT-REF-POINT2, respectively. Recommended values, which depend on type of
> activity, occupant age, and other factors, may be found on p. 460ff of the
> Lighting Handbook, Eighth Edition, 1995, Illuminating Engineering Society of
> North America. Typical values are shown in Table 28. It is assumed that
> this lighting level will be produced by the overhead electric lights at full
> output . These setpoints may be chosen to be lower when the overhead lights
> provide ambient lighting that is supplemented by task lighting. (The
> illuminance from task lighting is not included in LIGHT-SET-POINT1 or
> LIGHT-SET-POINT2.)
>
> The two different keywords allow for two separate control zones within each
> space/zone defined in the model.
>
>
>
> Note: you can change this under the “Internal Loads” screen for each zone,
> either by going to an individual zone or by using the spreadsheet mode – it
> doesn’t have to be done by editing the INP file.
>
>
>
> If you want to have a place to adjust it easily or to look at parametric
> analysis of results for different set points, create a global parameter
> (e.g. “Daylight FC”) of type “Numerical Value” and set it to your current
> design set point.  Then, in either spreadsheet mode or on the daylighting
> tab for each zone, right click on the “Light Set Point (fc)” value and
> “Edit/View User Expression”.  Type in #PA(“Daylight FC”).  Each time you
> change the value of that global parameter, either in the interface or
> through a parametric analysis, each system set to use that global parameter
> will also change.
>
>
>
> *Jeremy R. Poling, PE, LEED AP+BDC*
>
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Arpan Bakshi
> *Sent:* Thursday, April 21, 2011 10:17 AM
> *To:* equest-users
> *Subject:* [Equest-users] Design Light Levels
>
>
>
> Hello All
>
>
>
> I am looking through my INP trying to change design light levels for the
> daylight sensors by keyword if possible.
>
> I REALLY don't want to go back into wiz mode !!!
>
>
>
> Anyone know if there is a keyword for this? Is it somehow set in the PD2,
> is that why I don't see a foot-candle assignment in the INP?
>
>
>
> Thank you.
> --
>
>
>
>
>
> *Arpan Bakshi**  *LEED AP BD+C**
>
>
>
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>


-- 
Carol Gardner PE
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