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hrv/erv savings are all about controls. the default setting is on
when system fans are on. this can easily cost you more money &
energy than not having the erv at all. <br>
<br>
if the project is not designed for the hrv to operate on a delta t
between the exhaust air & outside air this isn't really
obvious. i suggest changing the control type to delta t & try a
few different amounts. 10 d f, 15 d f, 20 d f & see what the
results are. these can also be set up with an eem so you don't have
to keep changing the main system & seeing what the results are.<br>
<br>
look in the march 2012 ashrae journal. there's an article
explaining how to control a total energy wheel & the 2nd
paragraph or so actually says an uncontrolled erv can result in more
energy & more cost. though you only have an hrv the concepts in
the article will still apply for heating mode of course.<br>
<br>
On 6/7/12 9:16 AM, Samantha MacHardy wrote:
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<p class="MsoNormal">Hello! <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m working on modeling a Student Learning
Centre and am having a bit of trouble with modeling an HRV. I
go to the Air-Side HVAC and edit the Heat Recovery to say: <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Device Installed – Yes <o:p></o:p></p>
<p class="MsoNormal">Device Type: Sensible HX <o:p></o:p></p>
<p class="MsoNormal">Effectiveness: 0.7 <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">with everything else left as defaults to
each of my systems. In my end results, my Domestic Hot Water
and Space Heating are over 97% better, and my cooling is 50%
worse than the reference. These numbers aren’t making sense
but I can’t find much help anywhere with HRV in EQuest. Any
help you could provide would be great!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:green">Samantha
MacHardy</span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:green">,
B. Arch. Sci.</span><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:navy"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:green">Energy
Analyst</span><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";color:navy"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:gray">Provident
Energy Management Inc.</span><span style="color:navy"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:gray">T:
416-736-0630 x 2983 | <a moz-do-not-send="true"
href="mailto:smachardy@pemi.com"><span style="color:blue">smachardy@pemi.com</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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