<div dir="ltr">Ok, so I've been doing various iterations to see how adjusting the infiltration schedules affects the auto-sized heating capacity. When I change the schedule for Heating Design Day, it appears to have no effect on the autosized capacity. But, if I change the actual infiltration in the schedule, the capacity will change accordingly.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Oct 29, 2015 at 8:30 AM, Julien Marrec <span dir="ltr"><<a href="mailto:julien.marrec@gmail.com" target="_blank">julien.marrec@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>I think this may be your problem right there :)<br><br><br></div></div><div class="gmail_extra"><span class=""><br clear="all"><div><div><div dir="ltr"><div>--<br>Julien Marrec, EBCP, BPI MFBA<br>Energy&Sustainability Engineer<br>T: <a href="tel:%2B33%206%2095%2014%2042%2013" value="+33695144213" target="_blank">+33 6 95 14 42 13</a><br><span style="color:rgb(0,0,0)"><br></span><span style="color:rgb(0,0,0)">LinkedIn (en) : <span style="color:rgb(0,0,0)"><a href="http://www.linkedin.com/in/julienmarrec" target="_blank">www.linkedin.com/in/julienmarrec</a><br></span>LinkedIn (fr) : <a href="http://www.linkedin.com/in/julienmarrec/fr" target="_blank">www.linkedin.com/in/julienmarrec/fr</a></span><br><span style="color:rgb(0,0,0)"><a href="http://www.linkedin.com/in/julienmarrec" target="_blank"></a></span></div></div></div></div>
<br></span><div><div class="h5"><div class="gmail_quote">2015-10-29 13:15 GMT+01:00 Michael Campbell <span dir="ltr"><<a href="mailto:mcamp1206@gmail.com" target="_blank">mcamp1206@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi Joe,<br><br></div>I have and the SV-A report is giving me zero heating capacity for the bathroom zones.<br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Oct 28, 2015 at 9:14 PM, Joe Huang <span dir="ltr"><<a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Mike,<br>
<br>
Allow me to jump in here a bit. Have you looked at the SV-A report
to see what DOE-2.2 has sized for the HVAC system, particularly the
supply-cfm and heating/cooling capacities for the bathroom ? <br>
<br>
Joe<br>
<pre cols="90">Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
<a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.com</a>
<a href="http://weather.whiteboxtechnologies.com" target="_blank">http://weather.whiteboxtechnologies.com</a> for simulation-ready weather data
(o) <a href="tel:%28925%29388-0265" value="+19253880265" target="_blank">(925)388-0265</a>
(c) <a href="tel:%28510%29928-2683" value="+15109282683" target="_blank">(510)928-2683</a>
"building energy simulations at your fingertips"
</pre><div><div>
<div>On 10/28/2015 1:17 PM, Michael Campbell
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I've tried different values for the degree day
multipliers, into the hundreds. I'm trying out different
scenarios now to see what works, but I'm still getting unmet
heating hours in the bathroom.<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Oct 28, 2015 at 3:57 PM, Julien
Marrec <span dir="ltr"><<a href="mailto:julien.marrec@gmail.com" target="_blank">julien.marrec@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">
<div>Mike,</div>
<div><br>
</div>
<div>You have set a zonal exhaust with make up air defined
as infiltration? And your space linked to the thermal
zone has an infiltration defined as ACH with a higher
value for design days? How much higher?</div>
<div>Your HVAC is autosized for the zone?</div>
<div>Do you still have unmet hours for the bathroom?</div>
<div><br>
</div>
<div>If this is not doing anything, your HVAC system might
be already autosized to a greater value due to another
parameter such as sizing factor so that the added
infiltration does nothing.</div>
<div>Or maybe your zonal fan doesn't actually run? Try and
request some hourly variables to understand what is
going on.</div>
<div><br>
</div>
<div>Julien<br>
Envoyé de mon iPhone</div>
<div>
<div>
<div><br>
Le 28 oct. 2015 à 20:27, Michael Campbell <<a href="mailto:mcamp1206@gmail.com" target="_blank"></a><a href="mailto:mcamp1206@gmail.com" target="_blank">mcamp1206@gmail.com</a>>
a écrit :<br>
<br>
</div>
<blockquote type="cite">
<div>
<div dir="ltr">
<div>
<div>
<div>Julien,<br>
<br>
</div>
Regarding the infiltration method... I am
currently trying to do this with a small
bathroom with 50cfm exhaust. This is a core
zone. Adjusting the design day values as
described in the write-up does not appear to
be doing anything. Any thoughts?<br>
<br>
</div>
Thanks,<br>
</div>
Mike<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Oct 15, 2015 at
11:45 AM, Julien Marrec <span dir="ltr"><<a href="mailto:julien.marrec@gmail.com" target="_blank"></a><a href="mailto:julien.marrec@gmail.com" target="_blank">julien.marrec@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>Michael,<br>
<br>
</div>
<div>First, you're under 300 hours so
indeed it's a minor problem.<br>
<br>
</div>
<div>I've only looked at your model very
briefly but:<br>
<ul>
<li>HW loop operation is set to "SNAP"
at OA of 60°F. This is causing some
minor underheating in shoulder
season.<br>
</li>
</ul>
<ul>
<li>You have local exhaust fan with
makeup = infiltration. Basically
equest ignores this added
infiltration during the sizing, so
you have to trick it to take it into
account by having a different
schedule for sizing (heating AND
cooling design days). I've put
together my findings on the subject
on Unmet Hours <a href="https://unmethours.com/question/3102/how-do-you-model-exhaust-fans-in-equest/" target="_blank">here</a> in some
kind of tutorial that I hope is
helpful. <br>
</li>
</ul>
<p><br>
</p>
<p>Do the above and your unmet hours
disappear.</p>
<p><br>
</p>
<p>Additionally:<br>
</p>
<ul>
<li>Throttle range of 0.3°R seems
pretty aggressive to me.<br>
</li>
<li>when you use baseboards and want
to oversize, use the system's sizing
ratio</li>
</ul>
<br>
</div>
<div>Hope this helps,<br>
</div>
<div>Julien<br>
</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div>
<div dir="ltr">
<div>--<br>
Julien Marrec, EBCP, BPI MFBA<br>
Energy&Sustainability Engineer<br>
T: <a href="tel:%2B33%206%2095%2014%2042%2013" value="+33695144213" target="_blank">+33 6 95 14 42
13</a><br>
<span style="color:rgb(0,0,0)"><br>
</span><span style="color:rgb(0,0,0)">LinkedIn
(en) : <span style="color:rgb(0,0,0)"><a href="http://www.linkedin.com/in/julienmarrec" target="_blank"></a><a href="http://www.linkedin.com/in/julienmarrec" target="_blank">www.linkedin.com/in/julienmarrec</a><br>
</span>LinkedIn (fr) : <a href="http://www.linkedin.com/in/julienmarrec/fr" target="_blank"></a><a href="http://www.linkedin.com/in/julienmarrec/fr" target="_blank">www.linkedin.com/in/julienmarrec/fr</a></span><br>
<span style="color:rgb(0,0,0)"></span></div>
</div>
</div>
</div>
<br>
<div class="gmail_quote"><span>2015-10-15
16:30 GMT+02:00 Michael Campbell <span dir="ltr"><<a href="mailto:mcamp1206@gmail.com" target="_blank"></a><a href="mailto:mcamp1206@gmail.com" target="_blank">mcamp1206@gmail.com</a>></span>:<br>
</span>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>
<div dir="ltr">I mistakenly attached
the PRD file instead of PD2.
Correct files are attached.</div>
<div>
<div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On
Thu, Oct 15, 2015 at 10:16
AM, Michael Campbell <span dir="ltr"><<a href="mailto:mcamp1206@gmail.com" target="_blank"></a><a href="mailto:mcamp1206@gmail.com" target="_blank">mcamp1206@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>
<div>
<div>Hello,<br>
<br>
</div>
I'm having what
appears to be a
minor issue with
unmet hours in a
model that I've
inherited. My INP
and PD2 files are
attached. I've
tried adjusting the
cool sizing ratio
and and adjusted
infiltration rates
and equipment loads
with no real
effects. Anybody
have any ideas?<br>
<br>
</div>
Thanks,<br>
</div>
Mike Campbell<br>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
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