<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:10pt"><div>Vincent:<br><br>I have developed many projects that include the conversion from pneumatic to electronic actuated valves and dampers.<br><br>I investigate the existing pneumatic control system to document valve and damper overlap and other calibration errors and develop an Excel spreadsheet to calculate the savings. I often used Hobo dataloggers to track the existing temperature and reset errors.<br><br>An important consideration is if the existing system employs discharge air temperature reset and if this reset is based on OA or high-low space temperature. The more complex pneumatic systems of yesteryear can do either as well as static pressure reset and even comparative OA-RA enthalpy.<br><br>A DDC system might not save much energy if replacing a well maintained and calibrated
pneumatic control system. In addition, if the DDC programmer does not calibrate the PID loops correctly, the DDC system might actually use more energy. <br><br>Commissioning helps identify and correct this problem.<br><br>I don't think that I would try to calculate these savings using eQuest. Excel is a better tool for this function.<br><br>Good luck,<br><br>Paul Diglio<br><br><br><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> "Priolo, Vincent" <Vincent.Priolo@trane.com><br><b><span style="font-weight: bold;">To:</span></b> "equest-users@lists.onebuilding.org" <equest-users@lists.onebuilding.org><br><b><span style="font-weight: bold;">Sent:</span></b> Mon, November 22, 2010 1:03:53 PM<br><b><span
style="font-weight: bold;">Subject:</span></b> Re: [Equest-users] pnuematic -> DDC controls<br></font><br>
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Dear all,</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">New user here working on modeling VAV pneumatic to DDC conversion for energy savings. Looking to model chilled water reset, hot water
reset, pressure reset, increased VAV response, and energy savings from compressor. Looks like model must be done in Design Development Wizard.</span></font></p>
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Any advice?</span></font></p>
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<p class="MsoAutoSig"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Vince Priolo</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Energy Solutions Engineer</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Southern California</span></font><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">
Trane</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Cell - 805-550-4298</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Direct - 626-435-1187</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">vincent.priolo@trane.com</span></font></p>
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; 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>Praveen Jain<br>
<b><span style="font-weight: bold;">Sent:</span></b> Sunday, November 21, 2010 11:35 PM<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] Relative Humidity in Unco</span></font></p>
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Dear All<br>
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Is it possible to know Relative Humidity in unconditioned zone of eQUEST ?<br>
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With Thanks and Regards,<br>
Praveen K. Jain<br>
Roorkee</span></font></p>
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