What the heck is an ATTN screen?? Is it a LEED thingy??<br><br>Confused in Portland,<br>Carol<br><br><div class="gmail_quote">On Thu, May 6, 2010 at 12:39 PM, Eric O'Neill <span dir="ltr"><<a href="mailto:elo@michaelsengineering.com">elo@michaelsengineering.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Nick,</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">I’m not sure I can answer your question. Maybe someone can pick up on this line of thought though to answer the question.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">If you play with the numbers, a PLR of 1.1 is yielding that fan vsd signal of 1.257. I believe the PLR is calculated as (the current hour’s CFM)/(design CFM). So whatever’s going on here is causing the system to call for (or think it has) a CFM value 10% greater than design. Also, the function is supposed to set any outputs above the set maximum (in this case 1) to the maximum, so I’m not sure what about the last day of the year is causing it to ignore the maximum output value. </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">When I look at the hourly reports on a system that’s using that curve and getting that error at 12/31/24, my PLR (variable 60) looks fine, and the CFM is at its minimum. So I don’t think it’s a real issue. I’m also not very BDL/DOE2 literate, so I might be looking at this wrong.</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Also, if you really wanted a clean ATTN screen, you could just set your max output from that function to 1.28 ;-)</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Cheers,</span></p><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Eric</span></p><p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><div><div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">
<p class="MsoNormal" style="margin-left: 0.5in;"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Nick Caton<br>
<b>Sent:</b> Thursday, May 06, 2010 12:32 PM<br><b>To:</b> Carol Gardner<div><div></div><div class="h5"><br><b>Cc:</b> eQUEST Users List<br><b>Subject:</b> Re: [Equest-users] CAUTION: Variable Speed Drive FPLR???</div></div>
</span></p></div></div><div><div></div><div class="h5"><p class="MsoNormal" style="margin-left: 0.5in;"> </p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Thanks Carol!</span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);">I’m glad to see some supporting information to assure me this CAUTION is likely not a big deal, but it still kinda irks me that this is message is often the only thing between me and a perfectly blank ATTN report in my models…</span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);">If anyone can offer some insight regarding this VSD curve message’s meaning and/or root-causes, I’d be very grateful to either figure out a way to eliminate these CAUTIONS, or to otherwise be able to sleep at night knowing I can provide an in-depth response regarding its meaning and why it’s not a big deal and ignore-able.</span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);">~Nick</span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);"><img src="cid:image001.jpg@01CAED24.A6F881B0" alt="cid:489575314@22072009-0ABB" width="119" height="37"></span><b><span style="font-size: 11pt; color: rgb(45, 77, 94);"></span></b></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><b><span style="font-size: 11pt; color: rgb(45, 77, 94);"> </span></b></p><p class="MsoNormal" style="margin-left: 0.5in;"><b><span style="font-size: 11pt; color: rgb(45, 77, 94);">NICK CATON, E.I.T.</span></b><b><span style="color: rgb(45, 77, 94);"></span></b></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 7.5pt; color: rgb(204, 153, 0);">PROJECT ENGINEER</span><span style="font-size: 7.5pt; color: rgb(204, 153, 0);"></span></p><p class="MsoNormal" style="margin-left: 0.5in;">
<span style="font-size: 10pt; color: rgb(45, 77, 94);">25501 west valley parkway</span></p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 10pt; color: rgb(45, 77, 94);">olathe ks 66061</span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 10pt; color: rgb(45, 77, 94);">direct 913 344.0036</span></p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 10pt; color: rgb(45, 77, 94);">fax 913 345.0617</span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><i><span style="font-size: 10pt; color: rgb(45, 77, 94);">Check out our new web-site @ </span></i><span style="font-size: 11pt; color: rgb(31, 73, 125);"><a href="http://www.smithboucher.com" title="blocked::www.smithboucher.com" target="_blank"><span style="font-size: 10pt;">www.smithboucher.com</span></a></span><u><span style="font-size: 10pt; color: blue;"> </span></u><span style="font-size: 11pt; color: rgb(31, 73, 125);"></span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p><div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">
<p class="MsoNormal" style="margin-left: 0.5in;"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> Carol Gardner [mailto:<a href="mailto:cmg750@gmail.com" target="_blank">cmg750@gmail.com</a>] <br>
<b>Sent:</b> Thursday, May 06, 2010 12:25 PM<br><b>To:</b> Nick Caton<br><b>Cc:</b> eQUEST Users List<br><b>Subject:</b> Re: [Equest-users] CAUTION: Variable Speed Drive FPLR???</span></p></div><p class="MsoNormal" style="margin-left: 0.5in;">
</p><p style="margin-left: 0.5in;">Here you go Nick. This is in your 3-63 data area as DOE-2.chm. There is tons of info there. Cautions are the least of your worries.</p><p style="margin-left: 0.5in;">ERRORS Diagnostics deal with problems in the input that must be corrected before the simulation will execute. </p>
<p style="margin-left: 0.5in;">WARNINGS Diagnostics are concerned with input data that can be used in the simulation but are probably erroneous (such as a temperature input of 700 instead of 70.0). </p><p style="margin-left: 0.5in;">
CAUTIONS Diagnostics are much less severe than WARNINGS messages and deal with questionable input value that do not significantly affect the results of the simulation. This is the default level.</p><p style="margin-left: 0.5in;">
Regards,</p><p style="margin-left: 0.5in;">Carol</p><p class="MsoNormal" style="margin-right: 0in; margin-bottom: 12pt; margin-left: 0.5in;"> </p><div><p class="MsoNormal" style="margin-left: 0.5in;">On Thu, May 6, 2010 at 9:32 AM, Nick Caton <<a href="mailto:ncaton@smithboucher.com" target="_blank">ncaton@smithboucher.com</a>> wrote:</p>
<div><div><p class="MsoNormal" style="margin-left: 0.5in;">On many projects, I’ve run into the following typical CAUTION in my SIM ATTN report:</p><p class="MsoNormal" style="margin-left: 0.5in;"> </p><p style="margin-left: 0.5in;">
<span style="font-size: 8pt; font-family: "Courier New";"> </span></p><p style="margin-left: 0.5in;"><span style="font-size: 8pt; font-family: "Courier New";"> **CAUTION**********************************************************************</span></p>
<p style="margin-left: 0.5in;"><span style="font-size: 8pt; font-family: "Courier New";"> In curve: Variable Speed Drive FPLR the dependent value</span></p><p style="margin-left: 0.5in;"><span style="font-size: 8pt; font-family: "Courier New";"> is exceeding the limits.</span></p>
<p style="margin-left: 0.5in;"><span style="font-size: 8pt; font-family: "Courier New";"> Value/Min/Max/First time: 1.257 0.100 1.000 12/31/24</span></p><p class="MsoNormal" style="margin-left: 0.5in;">
</p><p class="MsoNormal" style="margin-left: 0.5in;"> </p><p class="MsoNormal" style="margin-left: 0.5in;">It’s <u>always</u> referencing this specific library VSD curve, and it <u>always</u> occurs in the last hours of the very last day of the modeled year. I’ve seen it so much I’m pretty certain that particular value 1.257 is always present too.</p>
<p class="MsoNormal" style="margin-left: 0.5in;"> </p><p class="MsoNormal" style="margin-left: 0.5in;">What are the implications here to the modeled behavior? Is this caution something of concern? Is something off with the library curve?</p>
<p class="MsoNormal" style="margin-left: 0.5in;"> </p><p class="MsoNormal" style="margin-left: 0.5in;">I’ve always assumed that if something is only off in the last hours of the modeled year, it shouldn’t be a big deal – but it’s bugging me that I’m seeing this come up again and again and I don’t know what it really means…</p>
<p class="MsoNormal" style="margin-left: 0.5in;"> </p><p class="MsoNormal" style="margin-left: 0.5in;">~Nick</p><p class="MsoNormal" style="margin-left: 0.5in;"> </p><p class="MsoNormal" style="margin-left: 0.5in;"> </p><p class="MsoNormal" style="margin-left: 0.5in;">
<img src="cid:image001.jpg@01CAED24.A6F881B0" alt="cid:489575314@22072009-0ABB" width="119" border="0" height="37"></p><p class="MsoNormal" style="margin-left: 0.5in;"><b><span style="color: rgb(45, 77, 94);"> </span></b></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><b><span style="color: rgb(45, 77, 94);">NICK CATON, E.I.T.</span></b></p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 7.5pt; color: rgb(204, 153, 0);">PROJECT ENGINEER</span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 10pt; color: rgb(45, 77, 94);">25501 west valley parkway</span></p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 10pt; color: rgb(45, 77, 94);">olathe ks 66061</span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 10pt; color: rgb(45, 77, 94);">direct 913 344.0036</span></p><p class="MsoNormal" style="margin-left: 0.5in;"><span style="font-size: 10pt; color: rgb(45, 77, 94);">fax 913 345.0617</span></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><i><span style="font-size: 10pt; color: rgb(45, 77, 94);">Check out our new web-site @ </span></i><span style="color: rgb(31, 73, 125);"><a href="http://www.smithboucher.com" title="blocked::www.smithboucher.com" target="_blank"><span style="font-size: 10pt;">www.smithboucher.com</span></a></span><u><span style="font-size: 10pt; color: blue;"> </span></u></p>
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