<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Hi,</DIV>
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<DIV>I have the same situation, My basline is using DX coils with furnace for warm up heat and VAV with electric coils for re heat. The addition of a dual enthalpy wheel heat recovery system caused the energy consumption to increase. I changed the default control to "Mixed Air Reset" and the consumption dropped significantly but is still slightly higher than the baseline run. Any other thoughts?<BR><BR>Thanks,</DIV>
<DIV>Doy Sanguyu<BR><BR><BR>--- On <B>Thu, 5/14/09, B. Fountain <I><bfountain@greensim.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid"><BR>From: B. Fountain <bfountain@greensim.com><BR>Subject: Re: [Equest-users] Heat recovery issues<BR>To: "Grove, Rebecca" <RGrove@ThorntonTomasetti.com><BR>Cc: equest-users@lists.onebuilding.org<BR>Date: Thursday, May 14, 2009, 9:28 AM<BR><BR>
<DIV class=plainMail>Note that the eQUEST default control for heat recovery is "Float" which<BR>maximizes heat recovery at all times. Consider changing this to "Mixed<BR>Air Reset" where heat recovery will be modulated, allowing economizer free<BR>cooling when applicable.<BR><BR>> I seem to be running into a slight problem getting the heat recovery<BR>> system to work. Right now I have it set as a sensible wheel with an<BR>> airflow of 35315 cfm and an efficiency of 60% (all according to the<BR>> specifications given to me). Unfortunately, using the heat exchanger<BR>> actually causes my energy consumption to increase. Do you have any idea<BR>> why this might be happening and what I can do to fix it?<BR>><BR>><BR>> Rebecca Grove, LEED AP<BR>> Senior Engineer<BR>> Thornton Tomasetti<BR>> One Audubon Street, Fourth Floor<BR>> New Haven, CT 06511<BR>> T 203.672.1390 F 203.672.1391<BR>> D
203.672.1436<BR>> <A href="http://us.mc01g.mail.yahoo.com/mc/compose?to=RGrove@ThorntonTomasetti.com" ymailto="mailto:RGrove@ThorntonTomasetti.com">RGrove@ThorntonTomasetti.com</A><BR>> www.ThorntonTomasetti.com<BR>><BR>> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><BR>> The information in this email and any attachments may contain<BR>> confidential information that is intended solely for the<BR>> attention and use of the named addressee(s). This message or<BR>> any part thereof must not be disclosed, copied, distributed<BR>> or retained by any person without authorization from the<BR>> addressee. If you are not the intended addressee, please<BR>> notify the sender immediately, and delete this message.<BR>>
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