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<p class=MsoNormal><b><font size=2 face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>I am modeling the
water side economizer by eQuest. When the outdoor temperature is lower than the
pre-set temperature, the chiller will stop operating and heat exchanger will substitute
the chiller to cool down the chilled water. The eQuest simulation program,
however, seems that the definition is differ from our approach. From the help
section of eQuest, WS Economizer effectiveness is defined as “</span></font></b><b><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial;
font-weight:bold'>The coil design effectiveness for the economizer coil,
between the condenser water loop and the mixed-air temperature”. If the
one defined by eQuest is same as that defined by me, shouldn’t the
effectiveness be the effectiveness between the condenser water loop and the <u>outdoor</u>
air temperature? And as heat exchanger does not involved in the eQuest WS
Economizer, does it mean that eQuest’s WS Economizer cannot model our system?
If yes, is it possible to simulate this system through other ways? If no, could
anyone advise how to input this system? Many thanks.</span></font></b><b><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial;
font-weight:bold'><o:p></o:p></span></font></b></p>
<p class=MsoNormal><b><font size=2 face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;font-weight:bold'><o:p> </o:p></span></font></b></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><b><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>Best
regards,</span></font></b></strong><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><b><font
size=6 color="#99ccff" face="CommercialScript BT"><span lang=EN-US
style='font-size:22.0pt;font-family:"CommercialScript BT";color:#99CCFF'>Jonathan
Mak<o:p></o:p></span></font></b></strong></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><b><font
size=4 color=navy face=PanRoman><span lang=EN-US style='font-size:14.0pt;
font-family:PanRoman;color:navy'>LEED AP</span></font></b></strong><font
size=4 color=navy face=PanRoman><span lang=EN-US style='font-size:14.0pt;
font-family:PanRoman;color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=DE
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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