<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
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;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:Arial;
color:windowtext;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The system is a residential building with 10 FCU (cooling
only) with CAV fans. The 10 FCUs get fresh air from a dedicated (100% OA)
Energy Recovery Vent. System. The ERV system has an enthalpy wheel, a SF fan, a
EF fan and a cooling coil. All cooling is from a campus loop.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Now, we have two options to model this.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Option 1 –To model the FCUs (as they are) and then
define a separate Single Zone system with an ERV. This SZ system will not be
attached to any zone but will have an enthalpy wheel, a SF fan, a EF fan and a
cooling coil. Next we link the OA for the FCUs as “from” this
Single Zone ERV system. This way we can account for the SF, EF, Wheel Motor and
CC energy at the ERV. This does not work as eQ does not allow us to have a
Single Zone system with an ERV which is not connected to any zone.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Option 2 – Here, we are modeling the FCUs as
Single Zone system with an ERV. Thus I have a 10 Single Zone ERV systems and no
FCU. Now, in the ERV tab of the SZ ERV I can account for the air through ERV,
SF kw, EF kw, wheel motor but no CC energy. Also, we are prorating the total
ERV energy based on CFM for each FCU. The issue is that we are not able to
program in the cooling coil energy of the original ERV. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Currently, we are using Option 2 but would have preferred
Option 1 as it is closer to reality. Any thoughts?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:navy'>Abhinav Devra</span></font><font size=1><span
style='font-size:9.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:navy'>Project Engineer</span></font><font size=1><span
style='font-size:9.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:navy'>Kamal Cogent Energy,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:navy'>Kamal Ratan Chambers 1st Floor,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:navy'>Opp G.P.O., M.I.Road,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:navy'>Jaipur 302001<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=navy face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:navy'>Ph +91 141 2373184-85 (W)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><a href="BLOCKED::http://www.kamalcogentenergy.com"
title="http://www.kamalcogentenergy.com"><font size=1 color=navy face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:navy'>www.kamalcogentenergy.com</span></font></a></span></font><font
size=1><span style='font-size:9.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
</body>
</html>