<html xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns:ns0="urn:schemas-microsoft-com:office:smarttags">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<meta name=Generator content="Microsoft Word 10 (filtered)">
<title>RE: Heat Rejection consumption is so small!!</title>
<style>
<!--a:link
{mso-style-priority:99;}
span.MSOHYPERLINK
{mso-style-priority:99;}
a:visited
{mso-style-priority:99;}
span.MSOHYPERLINKFOLLOWED
{mso-style-priority:99;}
p
{mso-style-priority:99;}
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
p
{margin-right:0cm;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman";}
span.EmailStyle18
{font-family:Calibri;
color:#1F497D;}
span.EmailStyle19
{font-family:Arial;
color:navy;}
@page Section1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.Section1
{page:Section1;}
/* List Definitions */
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
-->
</style>
</head>
<body lang=EN-GB link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>James,</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thank you for your advice.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I did what you told me regarding the LOAD
RESET for the condenser water loop. Please find the attached excel file with
the results.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I am happy that the heat rejection is now
a significant number. However:</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<ol start=1 type=1>
<li class=MsoNormal style='color:navy'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial'>The space cooling for the
proposed case is now higher than the baseline case, which is unacceptable
due to the better HVAC system</span></font></li>
<li class=MsoNormal style='color:navy'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial'>The space cooling for both
cases has decreased significantly. Can you please check the numbers and
the percentages of the space cooling with respect to the whole building
consumption?</span></font></li>
</ol>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Unfortunately, I may keep the condenser
water loop controls at “Fixed” and “setpoint = 85F”,
because of the first reason up.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </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 regards,</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Omar</span></font></p>
<div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>___________________________</span></font></p>
<p class=MsoNormal><st1:PersonName style="BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x; BACKGROUND-POSITION: left bottom"><st1:PersonName style="BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x; BACKGROUND-POSITION: left bottom"><st1:PersonName style="BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x; BACKGROUND-POSITION: left bottom"><st1:PersonName style="BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x; BACKGROUND-POSITION: left bottom"><font
size=2 color=navy face=Arial><span 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></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Email: <st1:PersonName style="BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x; BACKGROUND-POSITION: left bottom"><a
href="mailto:omar@ecoconsulting.net">omar@ecoconsulting.net</a></span></font></st1:PersonName></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> </span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:navy'>EcoConsulting (</span></font><font
size=1 color=navy face=Arial><span lang=EN-US style='font-size:7.5pt;
font-family:Arial;color:navy'>Lebanon</span></font><font size=1 color=navy
face=Arial><span lang=EN-US style='font-size:7.5pt;font-family:Arial;
color:navy'>)</span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:navy'>Nahas</span></font><font
size=1 color=navy face=Arial><span lang=EN-US style='font-size:7.5pt;
font-family:Arial;color:navy'> </span></font><font size=1 color=navy
face=Arial><span lang=EN-US style='font-size:7.5pt;font-family:Arial;
color:navy'>Building</span></font><font size=1 color=navy face=Arial><span
lang=EN-US style='font-size:7.5pt;font-family:Arial;color:navy'>, 4<sup>th</sup>
floor</span></font></p>
<p class=MsoNormal><font
size=1 color=navy face=Arial><span lang=EN-US style='font-size:7.5pt;
font-family:Arial;color:navy'>4 St-Maron Street</span></font><font size=1
color=navy face=Arial><span lang=EN-US style='font-size:7.5pt;font-family:Arial;
color:navy'> / </span></font><font
size=1 color=navy face=Arial><span lang=EN-US style='font-size:7.5pt;
font-family:Arial;color:navy'>Georges Haddad Avenue</span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:navy'>Postal Code: 2028 5806
SAIFI</span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:navy'>Beirut</span></font><font
size=1 color=navy face=Arial><span lang=EN-US style='font-size:7.5pt;
font-family:Arial;color:navy'>, </span></font><font size=1 color=navy
face=Arial><span lang=EN-US style='font-size:7.5pt;font-family:Arial;
color:navy'>Lebanon</span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:navy'>Tel: </span></font><font
size=1 color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'>+961 (0) 1 971 255<br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:7.5pt;
font-family:Arial;color:navy'>Mobile</span></font><font size=1 color=navy
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:navy'>:
+961 (0) 3 045 045</span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> </span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:navy'>EcoConsulting (</span></font><font size=1
color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'>UK</span></font><font size=1 color=navy face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:navy'>) Ltd<br>
28 </span></font><font
size=1 color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'>Marshalsea Road</span></font><font size=1 color=navy face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:navy'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:7.5pt;
font-family:Arial;color:navy'>London</span></font><font size=1 color=navy
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:navy'>, </span></font><font
size=1 color=navy face=Arial><span style='font-size:7.5pt;font-family:Arial;
color:navy'>SE1 1HF</span></font><font size=1 color=navy face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:navy'><br>
Tel: +44 (0) 207 939 0989<br>
Fax: +44 (0) 207 939 0981</span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:navy'>Website: <a
href="http://www.ecoconsulting.net/">www.ecoconsulting.net</a></span></font></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> </span></font></p>
<p style='margin:0cm;margin-bottom:.0001pt'><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'> <img border=0
width=870 height=102 src="cid:image001.jpg@01CB2A9C.AC9C2490"></span></font></p>
</div>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> James Hansen
[mailto:JHANSEN@ghtltd.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> 21 July 2010 17:59<br>
<b><span style='font-weight:bold'>To:</span></b> Omar Katanani; </span></font><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>equest-users@lists.onebuilding.org</span></font><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'><br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Equest-users] Heat
Rejection consumption is so small!!</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Cooling towers are
just fans, so it’s no surprise that their percentage relative to the
total consumption is small. Make sure your cell KW or total fan EIR is
accurate.</span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'> </span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>And as for your
question on reset: I usually just specify the condenser water loop
control strategy to be LOAD RESET, with a minimum reset temperature of 70
degrees. </span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'> </span></font></p>
<div>
<p class=MsoNormal><b><font size=2 color=teal face=Arial><span lang=EN-US
style='font-size:11.0pt;font-family:Arial;color:teal;font-weight:bold'>GHT
Limited<br>
</span></font></b><b><font size=2 color=black face=Arial><span lang=EN-US
style='font-size:11.0pt;font-family:Arial;color:black;font-weight:bold'><ns0:PersonName>James
Hansen</ns0:PersonName></span></font></b><b><font size=2 color=black
face=Calibri><span lang=EN-US style='font-size:11.0pt;font-family:Calibri;
color:black;font-weight:bold'>, PE, LEED AP</span></font></b></p>
<p class=MsoNormal><b><font size=2 color=black face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:black;font-weight:bold'>Senior
Associate</span></font></b></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:black'><ns0:Street><ns0:address>1010
N. Glebe Rd, Suite 200</ns0:address></ns0:Street></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:black'><ns0:place><ns0:City>Arlington</ns0:City>,
<ns0:State>VA</ns0:State> <ns0:PostalCode>22201-4749</ns0:PostalCode></ns0:place></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:black'>703-338-5754 (Cell)</span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:black'>703-243-1200 (Office)</span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span lang=EN-US
style='font-size:7.5pt;font-family:Arial;color:black'>703-276-1376 (Fax)</span></font></p>
<p class=MsoNormal><font size=2 color=teal face=Arial><span lang=EN-US
style='font-size:11.0pt;font-family:Arial;color:teal'><a
href="http://www.ghtltd.com/"><font size=2><span style='font-size:10.0pt'>www.ghtltd.com</span></font></a></span></font></p>
<p class=MsoNormal><b><font size=2 color="#31849b" face=Calibri><span
lang=EN-US style='font-size:11.0pt;font-family:Calibri;color:#31849B;
font-weight:bold'> </span></font></b></p>
</div>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-US
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'> </span></font></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US 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> Wednesday, July 21, 2010
9:55 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Omar Katanani;
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users] Heat
Rejection consumption is so small!!</span></font></p>
</div>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'> </span></font></p>
<p style='margin-bottom:12.0pt'><font size=2 face="Times New Roman"><span
lang=EN-US style='font-size:10.0pt'>Dear all,<br>
<br>
Can anyone please answer my question that I sent last week? Your continuous
support is much appreciated!<br>
In addition to that, I have this small question below:<br>
<br>
Section G3.1.3.11 of ASHRAE 90.1 - 2007 says:<br>
<br>
"Condenser water design supply temperature shall be 85°F or 10°F
approaching design wet-bulb temperature, whichever is lower, with a design
temperature rise of 10°F. The tower shall be controlled to maintain a 70°F
leaving water temperature where weather permits, floating up to leaving water
temperature at design conditions."<br>
<br>
I was able to put the design set point temperature and the loop design DT
of the Condenser water loop to 85F and 10F respectively.<br>
<br>
What about the tower? Where can I input this leaving temperature range from 70F
up to the leaving water temperature?<br>
<br>
<br>
Many thanks!<br>
Omar<br>
___________________________<br>
<br>
Omar Katanani<br>
Sustainable Design Engineer<br>
Email: omar@ecoconsulting.net<br>
<br>
<br>
EcoConsulting (Lebanon)<br>
Nahas Building, 4th floor<br>
4 St-Maron Street / Georges Haddad Avenue<br>
Postal Code: 2028 5806 SAIFI<br>
Beirut, Lebanon<br>
Tel: +961 (0) 1 971 255<br>
Mobile: +961 (0) 3 045 045<br>
<br>
<br>
EcoConsulting (UK) Ltd<br>
28 Marshalsea Road<br>
London, SE1 1HF<br>
Tel: +44 (0)207 939 0989<br>
Fax: +44 (0)207 939 0981<br>
Website: www.ecoconsulting.net<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: Omar Katanani<br>
Sent: Thu 7/15/2010 1:54 PM<br>
To: equest-users@lists.onebuilding.org<br>
Subject: Heat Rejection consumption is so small!!<br>
<br>
<br>
<br>
Dear all,<br>
<br>
<br>
<br>
What are typical values for heat rejection, if my Space Cooling constitutes 25%
of my school consumption? All I'm getting is 1% or so!<br>
<br>
<br>
<br>
I left eQUEST to autosize the capacity of the tower, and I entered many default
values into the inputs of the Open Tower and the Condenser Loop. I've heard
that Heat Rejection in such climates such as Lebanon should reach at least 10%.<br>
<br>
<br>
<br>
One more thing, when modeling the baseline case according to ASHRAE 90.1, I
read that I should model a condenser water loop for each chiller. So if I have
2 chillers, will I need 2 Open Towers?<br>
<br>
<br>
<br>
Many thanks,<br>
<br>
Omar<br>
<br>
___________________________<br>
<br>
Omar Katanani<br>
Sustainable Design Engineer<br>
<br>
Email: omar@ecoconsulting.net<br>
<br>
<br>
<br>
EcoConsulting (Lebanon)<br>
<br>
Nahas Building, 4th floor<br>
<br>
4 St-Maron Street / Georges Haddad Avenue<br>
<br>
Postal Code: 2028 5806 SAIFI<br>
<br>
Beirut, Lebanon<br>
<br>
Tel: +961 (0) 1 971 255<br>
Mobile: +961 (0) 3 045 045<br>
<br>
<br>
<br>
EcoConsulting (UK) Ltd<br>
28 Marshalsea Road<br>
London, SE1 1HF<br>
Tel: +44 (0) 207 939 0989<br>
Fax: +44 (0) 207 939 0981<br>
<br>
Website: www.ecoconsulting.net <<a href="http://www.ecoconsulting.net/">http://www.ecoconsulting.net/</a>><br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
</span></font></p>
</div>
</body>
<!--[object_id=#ghtltd.com#]--><P align=left><FONT size=2><FONT face=Tahoma><FONT color=#0000ff>
<HR>
</FONT></FONT><FONT color=#0000ff><FONT color=#000000><FONT face=Arial>The information contained in this communication is confidential, may be privileged, and is intended only for the use of the addressee. It is the property of GHT Limited. Unauthorized use, disclosure or copying of this communication or any part thereof is strictly prohibited and may be unlawful. If you have received this communication in error, please notify me immediately by return e-mail or by e-mail to </FONT><A href="mailto:ght@ghtltd.com"><FONT face=Arial>ght@ghtltd.com</FONT></A><FONT face=Arial>, and destroy this communication and all copies thereof, including all attachments. Thank you.</FONT></FONT><FONT face=Tahoma color=#000000></FONT></P></FONT></FONT>
</html>