<div dir="ltr"><p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)">Dear eQUEST experts,<br><br></span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><font color="#274e13" face="Arial, sans-serif"><span style="font-size:10pt">I am still struggling to
find out the main </span><span style="font-size:13.3333330154419px">reason</span><span style="font-size:10pt">(s) for high-energy consumption of WLHP system comparing
to PTAC system and what can be done to make this system more efficient that the
baseline system. In other words for complying with EAp2 requirements, for a mid
rise residential building what types of HVAC systems (other than split system
HP) can be selected which consume less annual energy than the PTAC. </span></font><br><br><font color="#274e13" face="Arial, sans-serif"><span style="font-size:10pt">
I would appreciate it if you would share your experience on this and make some recommendation.</span></font><br><br><font color="#274e13" face="Arial, sans-serif"><span style="font-size:10pt">
Morteza</span></font><br>
<br>
<font color="#274e13" face="Arial, sans-serif"><span style="font-size:10pt"></span></font></p><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><img src="https://lh6.googleusercontent.com/Uuukta80GuFfvKouzA0mdSvUXqml7MtSwSiw-evuGMU=w147-h43-p-no"><br><div><br></div></div></div></div>
<br><div class="gmail_quote">On Mon, May 4, 2015 at 4:03 PM, <span dir="ltr"><<a href="mailto:equest-users-request@lists.onebuilding.org" target="_blank">equest-users-request@lists.onebuilding.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Send Equest-users mailing list submissions to<br>
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<br>Today's Topics:<br>
<br>
1. PTAC vs WLHP Annual Energy Consumption (Morteza Kasmai)<br>
2. Re: PTAC vs WLHP Annual Energy Consumption (David Reddy)<br>
<br><br>---------- Forwarded message ----------<br>From: Morteza Kasmai <<a href="mailto:morteza.kasmai@gmail.com">morteza.kasmai@gmail.com</a>><br>To: "<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>Cc: <br>Date: Mon, 4 May 2015 12:04:23 -0400<br>Subject: [Equest-users] PTAC vs WLHP Annual Energy Consumption<br><div dir="ltr"><div><p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)">Dear all,</span></p><p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)"><br>
This is a multifamily mid-rise building, 9 floors above grade. Per ASHRAE Table
G3.1.1A the Baseline HVAC system is system 1 (PTAC with hot-water fossil fuel
boiler) 9.3 to 11 EER. <br>
Selected HVAC system for the proposed design is WLHP (3 Ton High efficiency HP
by Daikin, 15.9 EER and 4.83 COP) with 2 cell cooling tower, DOAS unit (9.8 EER)
and 2 Boilers (0.92 Eff.).</span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)"> </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)">Although the
efficiency of the selected HVAC systems is much higher than the efficiency of
the baseline model, the simulation results indicate annual energy consumption
of the proposed design is much higher than the baseline! </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)"> </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)">Am I missing something
or did something wrong in the models? Please see the attached files of the both
models</span></p><p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)">.</span></p>
<span style="font-size:10pt;line-height:115%;font-family:Arial,sans-serif;color:rgb(39,78,19)">I would greatly appreciate it if anyone kindly gives some feedback on this,<br>
<br>
</span><span style="font-size:10pt;line-height:115%;font-family:Arial,sans-serif;color:rgb(39,78,19)"> Morteza<br>
<br>
</span></div><div><br></div><div><br></div><br clear="all"><div><div><div dir="ltr"><img src="https://lh6.googleusercontent.com/Uuukta80GuFfvKouzA0mdSvUXqml7MtSwSiw-evuGMU=w147-h43-p-no"><br><div><br></div></div></div></div>
</div>
<br><br>---------- Forwarded message ----------<br>From: David Reddy <<a href="mailto:david@360-analytics.com">david@360-analytics.com</a>><br>To: <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>Cc: <br>Date: Mon, 04 May 2015 09:39:44 -0700<br>Subject: Re: [Equest-users] PTAC vs WLHP Annual Energy Consumption<br>
<div bgcolor="#FFFFFF" text="#000000">
Hi Morteza,<br>
I have not reviewed the results or detailed inputs of your model,
but one thing to be aware is that depending on the rating conditions
of your efficiency data, you may have to adjust the EIRs to be
consistent with DOE-2 performance curves. The default DOE-2 curves
are normalized to the GSHP rating condition, so if using these and
if your efficiency data is @ the WSHP rating condition, you will
need to apply these adjustments.<br>
<br>
Here is the table from the DOE-2 help provided with eQUEST. There
is a library of DOE-2 WSHP curves available from ClimateMaster that
do not need these adjustments.<br>
<br>
<img src="cid:part1.09000805.02090203@360-Analytics.com" alt="" height="162" width="733"><br>
<br>
- David<br>
<br>
<div>On 5/4/2015 9:04 AM, Morteza Kasmai
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)">Dear
all,</span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)"><br>
This is a multifamily mid-rise building, 9 floors above
grade. Per ASHRAE Table
G3.1.1A the Baseline HVAC system is system 1 (PTAC with
hot-water fossil fuel
boiler) 9.3 to 11 EER. <br>
Selected HVAC system for the proposed design is WLHP (3
Ton High efficiency HP
by Daikin, 15.9 EER and 4.83 COP) with 2 cell cooling
tower, DOAS unit (9.8 EER)
and 2 Boilers (0.92 Eff.).</span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)"> </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)">Although
the
efficiency of the selected HVAC systems is much higher
than the efficiency of
the baseline model, the simulation results indicate annual
energy consumption
of the proposed design is much higher than the baseline! </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)"> </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)">Am
I missing something
or did something wrong in the models? Please see the
attached files of the both
models</span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;background-image:initial;background-repeat:initial"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(39,78,19)">.</span></p>
<span style="font-size:10pt;line-height:115%;font-family:Arial,sans-serif;color:rgb(39,78,19)">I
would greatly appreciate it if anyone kindly gives some
feedback on this,<br>
<br>
</span><span style="font-size:10pt;line-height:115%;font-family:Arial,sans-serif;color:rgb(39,78,19)"> Morteza<br>
<br>
</span></div>
<div><br>
</div>
<div><br>
</div>
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<div>
<div>
<div dir="ltr"><img src="https://lh6.googleusercontent.com/Uuukta80GuFfvKouzA0mdSvUXqml7MtSwSiw-evuGMU=w147-h43-p-no"><br>
<div><br>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset></fieldset>
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