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<DIV>We are trying to model a building with enthalpy wheel OA energy recovery. </DIV>
<DIV>After completing the entire model and getting all set up in detailed edit mode, when we add in an enthalpy wheel for even just one zone, the cooling energy increases. Heating energy does decrease. </DIV>
<DIV>We tried to:</DIV>
<DIV>1. Control sequence of operation for OA exhaust delta enthalpy (also same result if control when fans on and control by differential T)</DIV>
<DIV>2. As a test, it made no difference if it was enthalpy wheel, sensible wheel, enthalpy HX, sensible HX or heat pipe... same story with cooling increased.</DIV>
<DIV>3. Even with fan pressure rise set to '0' (no fan energy), cooling increased. </DIV>
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<DIV>We have tried a multitude of combinations and keep getting similar results.</DIV>
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<DIV><FONT color=#000080>Tom Lawrence, Ph.D., P.E., LEED-AP</FONT></DIV>
<DIV><FONT color=#000080>Public Service Associate, </FONT><FONT color=#000080>Faculty of Engineering</FONT></DIV>
<DIV><FONT color=#000080>Driftmier Engineering Center</FONT></DIV>
<DIV><FONT color=#000080>University of Georgia</FONT></DIV>
<DIV><FONT color=#000080>Athens, GA 30602</FONT></DIV>
<DIV><FONT color=#000080>(706) 542-4322</FONT></DIV>
<DIV><FONT color=#000080><A href="mailto:lawrence@engr.uga.edu">lawrence@engr.uga.edu</A></FONT></DIV>
<DIV><FONT color=#000080>"</FONT><FONT color=#000000>The only thing you take with you when you're gone is what you leave behind." - <EM>John Allston</EM></FONT></DIV></BODY></HTML>