[Equest-users] Heat recovery issues

[Doy S]

Hi,
 
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?

Thanks,
Doy Sanguyu


--- On Thu, 5/14/09, B. Fountain <bfountain at greensim.com> wrote:


From: B. Fountain <bfountain at greensim.com>
Subject: Re: [Equest-users] Heat recovery issues
To: "Grove, Rebecca" <RGrove at ThorntonTomasetti.com>
Cc: equest-users at lists.onebuilding.org
Date: Thursday, May 14, 2009, 9:28 AM


Note that the eQUEST default control for heat recovery is "Float" which
maximizes heat recovery at all times.  Consider changing this to "Mixed
Air Reset" where heat recovery will be modulated, allowing economizer free
cooling when applicable.

>  I seem to be running into a slight problem getting the heat recovery
> system to work. Right now I have it set as a sensible wheel with an
> airflow of 35315 cfm and an efficiency of 60% (all according to the
> specifications given to me). Unfortunately, using the heat exchanger
> actually causes my energy consumption to increase. Do you have any idea
> why this might be happening and what I can do to fix it?
>
>
> Rebecca Grove, LEED AP
> Senior Engineer
> Thornton Tomasetti
> One Audubon Street, Fourth Floor
> New Haven, CT  06511
> T 203.672.1390  F 203.672.1391
> D 203.672.1436
> RGrove at ThorntonTomasetti.com
> www.ThorntonTomasetti.com
>
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