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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>What I just did on a project was to run the building model in Daysim
to determine the light level in lux achieved in each space and generate an 8760
report. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Then I determined what fraction of light as compared to the
design light level I would achieve through daylighting. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The power fraction reduction is [1-(sensor lux/design lux)].<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Then I have a artificial lighting schedule for my building
within the Studio that I multiply the schedule fraction by the daylight
fraction to get the actual artificial light fraction for that hour. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Something you should be aware of is the limitations of your ballasts.
If the ballasts are stepped or can only dim to 50%, you will need to add more
logic to properly represent your lighting control system. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Also, make sure if you are controlling your blinds in radiance
to reduce glare that you use the same algorithms in TRNSYS because of the solar
heat gain on the windows. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Let me know if you have any questions. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Fred<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<table class=MsoNormalTable border=0 cellpadding=0 width=474 style='width:355.5pt'>
<tr>
<td width=167 valign=top style='width:125.25pt;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#660000;
text-transform:uppercase'>Fred Betz</span></b><b><span style='font-size:9.0pt;
font-family:"Calibri","sans-serif";color:#333333'> </span></b><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>PhD.,
LEED AP <br>
</span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#333333;text-transform:uppercase'>Sustainable Systems Analyst</span><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'><o:p></o:p></span></p>
</td>
<td width=10 valign=top style='width:7.5pt;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#333333'> <o:p></o:p></span></p>
</td>
<td width=283 valign=top style='width:212.25pt;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#660000'>AEI</span></b><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'> |
AFFILIATED ENGINEERS, INC. <br>
5802 Research Park Blvd. | Madison, WI 53719<br>
<br>
</span><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#660000'>P: 608.236.1175 | F: 608.238.2614</span><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'> <br>
</span><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";
color:#660000'><a href="mailto:fbetz@aeieng.com"><span style='color:#660000;
text-decoration:none'>fbetz@aeieng.com</span></a> | </span><b><span
style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#660000'><a
href="http://www.aeieng.com/"><span style='color:#660000;text-decoration:
none'>www.aeieng.com</span></a></span></b><span style='font-size:9.0pt;
font-family:"Calibri","sans-serif";color:#333333'> <o:p></o:p></span></p>
</td>
</tr>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Matt Duffy
[mailto:duffy@tess-inc.com] <br>
<b>Sent:</b> Friday, September 17, 2010 11:28 AM<br>
<b>To:</b> Kent Beason; trnsys-users@engr.wisc.edu<br>
<b>Subject:</b> Re: [TRNSYS-users] Radiance to/from TRNSYS<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><br>
Hello Kent,<br>
<br>
I actually was just presented a response by another user, Cramer Silkworth. I
am unfortunately not too familiar with Radiance, but here was the response.<br>
<br>
Best regards,<br>
<br>
Matt Duffy<br>
<br>
"<span style='font-size:10.0pt'>Both trnsys and radiance are very powerful
simulation engines. Though graphical interfaces for both exist (built-in with
Trnsys, in Simulation Studio, and as add-ons for Ecotect and Sketchup for
Radiance), they are most powerful when used like a programming language - ie,
modifying their text input files directly. This gives you the most control, and
once you learn their syntax, I'd say easier than the graphical interfaces.
Especially for parametric studies.<br>
<br>
If I were to want to couple radiance and trnsys for a project, I'd be using
DaySim as a front-end for radiance. Version 3 is on the verge of final release
(workable beta is available now - <a href="http://www.daysim.com/" target="_new">www.daysim.com</a>),
and it's free. It essentially runs radiance for your geometry in an annual
simulation (with weather data), can handle active shading and electric
lighting, and has numerous outputs - including one intended for coupling to
trnsys. Then you just need to set up your trnsys model to read this file from
daysim (it comes with a generic data file reader component), and then you use
your results to modify your lighting power accordingly (or whatever variable
you want to respond to lighting conditions). I can't say I've used too many
other daylight & energy modeling programs, but I'm fairly confident there
are very few if any other programs out there that can handle such a coupling as
detailed as trnsys & daysim/radiance can. I've heard of it being done with
eQuest, but I think the eQuest side of things is a bit limited. There are other
daylight simulation programs as well, but Radiance is always talked of as being
the industry 'standard.'"</span><br>
<br>
<br>
<br>
<o:p></o:p></p>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'><strong>----- Original Message
-----</strong><br>
<strong>From:</strong> "Kent Beason"
<kbeason@schlitterbahn.com> <br>
<strong>Sent:</strong> Fri, September 17, 2010 10:24<br>
<strong>Subject:</strong> [TRNSYS-users] Radiance to/from TRNSYS<o:p></o:p></p>
<div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>Dear TRNSYS users, </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>I am on the Radiance users
list and the following question regarding TRNSYS was posted in that
group. I believe they want to control the window blinds & the zone’s
artificial lighting based on lumens entering the zone:</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>We want to simulate the
lighting conditions in a building with the RADIANCE Software.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>The Simulation depends on
the natural and artificial light and the window blinds.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>After this simulation, we
want to send the results from RADIANCE to a simulation software called TRNSYS.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>Here are my questions
regarding this topic:</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>
Is it possible to couple RADIANCE with TRNSYS?</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>
Does RADIANCE only image-files (as output) produce?</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>
Have anybody of you, connect TRNSYS with RADIANCE successfully? </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>
And have you any tutorials or other useful documents/links?</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>Thank you in advance.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>Regards,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Courier New"'>Marion</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><span
style='font-family:"Garamond","serif"'>Kent Beason</span></strong><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Garamond","serif"'>Schlitterbahn
Development Group</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Garamond","serif"'>830-609-8904 m</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Garamond","serif"'>830-608-8040 f</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
</div>
</div>
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<pre>_______________________________________________<o:p></o:p></pre><pre>TRNSYS-users mailing list<o:p></o:p></pre><pre><a
href="javascript:bodyCreateMail('TRNSYS-users%40cae.wisc.edu')">TRNSYS-users@cae.wisc.edu</a><o:p></o:p></pre><pre><a
href="https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users"
target="_blank">https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users</a><o:p></o:p></pre></div>
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