[Equest-users] Input function with daylight factors for accurate daylighting

[Kent Beason]

The following article is a good read since it is related:
http://www.nrel.gov/sustainable_nrel/pdfs/47522.pdf.  Some background info
is given with regard to the shortfalls of DOE2 daylighting vs backward
raytracing aka Radiance-based tools also, so I thought I'd post it for
reference.  It also gives a good play-by-play in context of the NREL RSF
case study, which incorporated the use of SPOT, an Excel-based tool which
runs Radiance in the background.  

 

That said, IESVE currently would fit better in your process obviously since
it's already being used in the project as you say.  Similarly, as is
described for SPOT in the article, exporting a dimming schedule from IES is
simple from its Vista module once the simulation is done, and then imported
into eQuest.  Apparently lots of other schedules were created during the RSF
design with software tools better suited for various analyses but the
central energy model was crunched by eQuest I believe using those imported
schedules.  SPOT may still be of use as it is supposed to find the optimal
sensor placement, but any sensor placement will need to be consistent with
actual lighting layout/circuits anyways.  Anyone familiar with SPOT might be
able to contribute.

 

Kent Beason

-------------------------

office - 903 581 2291

cell - 830 609 8904

 

From: Sami, Vikram [mailto:vikram.sami at zgf.com] 
Sent: Tuesday, August 13, 2013 7:26 PM
To: Bishop, Bill; David Griffin; 'Busman, Michael R';
equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Input function with daylight factors for
accurate daylighting

 

Couple of suggestions:

 

1.       Run the model in IES - I think they have a better daylight
algorithm. 

2.       Use Daysim  - you can get hourly light level readings from Daysim
that you can postprocess to create a lighting schedule in eQUEST. This is
probably fairly labor intensive. 

 


Vikram Sami
Associate Partner

 

ZGF ARCHITECTS LLP
T 206.521.3509 E vikram.sami at zgf.com
925 Fourth Avenue, Suite 2400 
Seattle, WA 98104

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Bishop,
Bill
Sent: Friday, August 09, 2013 1:42 PM
To: David Griffin; 'Busman, Michael R'; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Input function with daylight factors for
accurate daylighting

 

David,

You can get a sense of the clerestory windows, curtain walls etc. in these
views. Obviously, this will be fun geometry in eQUEST. The design team is
also modeling it in IES-VE - I will see if they can get me their daylighting
output for comparison.

 





 

~Bill

 

From: David Griffin [mailto:dgriffin at etcgrp.com] 
Sent: Friday, August 09, 2013 4:30 PM
To: 'Busman, Michael R'; Bishop, Bill; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Input function with daylight factors for
accurate daylighting

 

Bill,

 

Since eQUEST utilizes a split flux calculation which averages lighting
levels, it is not super accurate when it comes to daylighting. You can,
however, use daylighting to approximate energy savings in eQUEST using
appropriately zoned perimeters spaces and sunspaces.

 

If you truly want accurate daylighting in eQUEST, you're going to have to
use a third party software and create an 8760 schedule within eQuest to
reflect the results (I suggest using a GUI for Radiance such as AGi32).

 

If I knew exactly what you were trying to do and had a better sense of the
geometry you are working with, I could assist you further.

 

Unlike Mike, the song is BEFORE my time, but I'll spare you the old guy
jokes ;)

 

Thanks,

 

David Griffin

Energy Analyst

ETC Group, LLC

801.278.1927 ext. 128

Cell 480.235.0899

Fax 801.486.0668

 <mailto:dgriffin at etcgrp.com> dgriffin at etcgrp.com

 

Copy of ETC_LogoOnly2_rgb_sm.png

1997 South 1100 East, Suite 201, Salt Lake City, UT 84106-4471 -
www.etcgrp.com <http://www.etcgrp.com/> 

----------------------------------------------------------------------------
--------------------------------------- 
CONFIDENTIALITY NOTICE This e-mail transmission, and any documents, files or
previous e-mail messages attached to it may contain confidential information
that is legally privileged.  If you are not the intended recipient or the
person responsible for delivering it to the intended recipient, you are
hereby notified that any disclosure, copying, distribution or use of any of
the information contained in or attached to this transmission is strictly
prohibited.  If you have received this transmission in error, please
immediately notify us by telephone at (801) 278-1927 and destroy the
original transmission and its attachments without reading them. Thank you.

 

From: Busman, Michael R [mailto:MBusman at chevron.com] 
Sent: Thursday, August 08, 2013 2:56 PM
To: Bishop, Bill; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Input function with daylight factors for
accurate daylighting

 

Bill,

 

Sorry, but I can't help you out on your daylighting question.  I'm also
sorry, but the song was AFTER my time.  I'm more into 60's & 70's music and
boogie woogie and piano blues artists who died 50 or more years ago. J

 

Mike Busman

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Bishop,
Bill
Sent: Thursday, August 08, 2013 10:25 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Input function with daylight factors for accurate
daylighting

 

I am modeling a building with many clerestory windows of various
orientations in a complex roof geometry. I would like to accurately model
the daylighting savings in eQUEST. Has anyone had luck creating an input
function that uses daylight illuminance factors, as described by Steve Baker
<http://simulationresearch.lbl.gov/dirpubs/complex_dayltg.pdf>  back when
Bush Sr. was president and this song
<http://www.youtube.com/watch?v=9EcjWd-O4jI>  was a Top 10 hit? "Limitations
of the Daylighting Calculation" and an "Example of Using Measured Daylight
Factors" using an input function are described in the DOE-2 help.

 

Thanks,

Bill

 

William Bishop, PE, BEMP, BEAP, LEED AP | Pathfinder Engineers & Architects
LLP

Senior Energy Engineer

 

134 South Fitzhugh Street                 Rochester, NY 14608

T: (585) 325-6004 Ext. 114            F: (585) 325-6005

 <mailto:wbishop at pathfinder-ea.com> bbishop at pathfinder-ea.com
<http://www.pathfinder-ea.com/> www.pathfinder-ea.com

P   Sustainability - the forest AND the trees. P   

 

 

  _____  

The contents of this email and any attachments to it contain confidential
and/or legally privileged information from Zimmer Gunsul Frasca Architects
LLP or its affiliates. If you are not the intended recipient, or an employee
or agent responsible for delivering this message to the intended recipient,
be aware that any disclosure, copying, distribution, or use of the
information contained herein is strictly prohibited. If you received this
transmission in error, please contact the sender and destroy the material in
its entirety, whether in electronic or hard copy format.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130814/13f9a7ea/attachment-0002.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 268706 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130814/13f9a7ea/attachment-0004.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 278325 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130814/13f9a7ea/attachment-0005.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 1559 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130814/13f9a7ea/attachment-0002.jpeg>