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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Omar,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The only thing that would save you a
significant amount of energy in my opinion would have been scheduling large VAV
air handling and plant equipment that was originally serving them. I had a
project where I took data closets off of the VAV units and put VRV units in the
closets so that the VAV units no longer had to run 24/7. Scheduling these large
VAV units had a significant savings impact.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>In your case, it sounds like you may have
something similar but I would need clarification. You said that your closets (that
you want to convert to VRV) are currently FCU. I assume that these FCUs are
served by chilled water. By switching these closets over to VRV, are you able
to now schedule the chiller off? If yes, I would assume that significant
savings would result by not running a chiller (and pumping) 24/7, even with a
high unloading capability and variable-speed pumping. (If you had low unloading
capability and constant pumping, more savings would result)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>At face value, simply changing the
efficiency of the cooling equipment isn’t enough to evaluate energy
savings. If, however, you can significantly change the schedule of plant
equipment because it is isolated from zones that require 24/7 operation,
savings could be significant and I would certainly recommend a model.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Sidenote: 10 COP seems very, very high for
even the best VRV equipment. I would check that value to ensure accuracy…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Best luck,<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Gary</span></font></st1:place></st1:City><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p></o:p></span></font></p>
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</span></font><font size=1 color=green face=Arial><span style='font-size:8.5pt;
font-family:Arial;color:green'>_______________________________________________________________________________________________________________________</span></font><font
size=1 color=navy face=Arial><span style='font-size:8.5pt;font-family:Arial;
color:navy'><o:p></o:p></span></font></p>
<p><b><font size=1 color=navy face=Arial><span style='font-size:8.5pt;
font-family:Arial;color:navy;font-weight:bold'>Gary Schrader</span></font></b><font
size=1 color=navy face=Arial><span style='font-size:8.5pt;font-family:Arial;
color:navy'> | </span></font><b><font size=1 color=green face=Arial><span
style='font-size:8.5pt;font-family:Arial;color:green;font-weight:bold'>Schneider
Electric </span></font></b><font size=1 color=navy face=Arial><span
style='font-size:8.5pt;font-family:Arial;color:navy'>| <b><span
style='font-weight:bold'>Buildings Business</span></b> | <b><span
style='font-weight:bold'>Energy Solutions </span></b>| <b><span
style='font-weight:bold'>Engineer I</span></b><br>
<b><span style='font-weight:bold'>Phone:</span></b> +1 913 217 8068 | <b><span
style='font-weight:bold'>Fax: </span></b>+1 913 469 0206<br>
<b><span style='font-weight:bold'>Email: </span></b><a
href="Mailto:gary.schrader@buildings.schneider-electric.com">gary.schrader@buildings.schneider-electric.com</a>
| <b><span style='font-weight:bold'>Site: </span></b><a
href="http://www.schneider-electric.com/buildings">www.schneider-electric.com/buildings</a>
| <b><span style='font-weight:bold'>Address: </span></b><st1:address w:st="on"><st1:Street
w:st="on">16011 College Boulevard, Suite 212</st1:Street>, <st1:City w:st="on">Lenexa</st1:City>,
<st1:State w:st="on">KS</st1:State> <st1:PostalCode w:st="on">66219</st1:PostalCode>,
<st1:country-region w:st="on">USA</st1:country-region></st1:address><br>
<br>
</span></font><font size=1 color=green face=Arial><span style='font-size:8.5pt;
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Omar Katanani<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, October 14, 2010
5:41 AM<br>
<b><span style='font-weight:bold'>To:</span></b>
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] VRV
Special case: is it worth modeling?</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Dear all,</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>My school has some 200
zones including classrooms, storage rooms, offices...</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>The HVAC system is a VAV
one, with FCU for 17 offices/storage rooms.</span></font><span lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>In the new updated design,
4 of these FCUs were replaced with a VRV system. I am about to model that:</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Do you think that these 4
small zones (electrical room (x 2), UPS room, telephone room) will
significantly change the Space Cooling results (not that no heating is required)?
I mean, these zones had FCUs and were conditioned. All that changed is that a
VRV (COP=10) replaced the chiller (COP=5.4) for only 4 zones!</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>I would like to avoid the
complexity of modeling VRVs if possible!</span></font><span lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Many thanks,</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Omar</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>___________________________</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><st1:PersonName style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x"><st1:PersonName style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x"><st1:PersonName style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x"><st1:PersonName style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x"><font
size=2 color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;
font-family:Arial;color:navy'>Omar Katanani<br>
</st1:PersonName></st1:PersonName></st1:PersonName></st1:PersonName>Sustainable
Design Engineer</span></font><span lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Email: <st1:PersonName style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x"><a
href="mailto:omar@ecoconsulting.net">omar@ecoconsulting.net</a></span></font></st1:PersonName><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:navy'> </span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:navy'>EcoConsulting (<st1:country-region w:st="on"><st1:place
w:st="on">Lebanon</st1:place></st1:country-region>)</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><st1:place w:st="on"><st1:PlaceName w:st="on"><font size=1
color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'>Nahas</span></font></st1:PlaceName><font size=1 color=navy
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:navy'> <st1:PlaceType
w:st="on">Building</st1:PlaceType></span></font></st1:place><font size=1
color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'>, 4<sup>th</sup> floor</span></font><span lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=1
color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'>4 St-Maron Street</span></font></st1:address></st1:Street><font
size=1 color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'> / <st1:Street w:st="on"><st1:address w:st="on">Georges Haddad
Avenue</st1:address></st1:Street></span></font><span lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:navy'>Postal Code: 2028 5806 SAIFI</span></font><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><font size=1
color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'>Beirut</span></font></st1:City><font size=1 color=navy
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:navy'>, <st1:country-region
w:st="on">Lebanon</st1:country-region></span></font></st1:place><span
lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:navy'>Tel:
</span></font><font size=1 color=navy face=Arial><span lang=EN-GB
style='font-size:7.5pt;font-family:Arial;color:navy'>+961 (0) 1 971 266<br>
<st1:City w:st="on"><st1:place w:st="on">Mobile</st1:place></st1:City>:
+961 (0) 3 045 045</span></font><span lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span lang=EN-GB
style='font-size:7.5pt;font-family:Arial;color:navy'>EcoConsulting (<st1:country-region
w:st="on"><st1:place w:st="on">UK</st1:place></st1:country-region>) Ltd<br>
<st1:Street w:st="on"><st1:address w:st="on">28 Marshalsea Road</st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on">London</st1:City>, <st1:PostalCode
w:st="on">SE1 1HF</st1:PostalCode></st1:place><br>
Tel: +44 (0) 207 939 0989<br>
Fax: +44 (0) 207 939 0981</span></font><span lang=EN-GB><o:p></o:p></span></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span lang=EN-GB
style='font-size:7.5pt;font-family:Arial;color:navy'>Website: <a
href="http://www.ecoconsulting.net/">www.ecoconsulting.net</a></span></font><span
lang=EN-GB><o:p></o:p></span></p>
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style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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