[Equest-users] Design Light Levels

Thu Apr 21 13:42:37 PDT 2011

While text-level .inp edits are very macho and everything, I'd also
encourage checking the window interfaces first if you're in detailed...
in the case of space daylighting inputs, I find all options are pretty
well organized.  You can tweak the sensor location and get a visual of
orientation/location in the background if necessary using these windows
also.

NICK CATON, E.I.T.

PROJECT ENGINEER

Smith & Boucher Engineers

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

www.smithboucher.com 

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 1:00 PM
To: Carol Gardner
Cc: equest-users
Subject: Re: [Equest-users] Design Light Levels

 Carol

For some reason my space definitions were missing the light-set-point
keyword, even though daylight was set to yes. In either case, Jeremy has
a good point. Sometimes we lose ourselves in our text files and forget
eQUEST has a more intuitive spreadsheet feature !

On Thu, Apr 21, 2011 at 1:13 PM, Carol Gardner <cmg750 at gmail.com> wrote:

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

-- 

Arpan Bakshi  LEED AP BD+C

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