[Trace-users] ERV savings

Wed Dec 15 13:20:26 PST 2010

Make sure you run a full 8760 hour run.  I have found this to indicate 
more savings as I assume it uses a wider range of temperatures.

Art Veneklase, P.E., LEED AP
URS
3950 Sparks Dr. S.E.
Grand Rapids, MI 49546
Phone: 616-574-8452
Cell: 616-581-9396
Fax: 616-574-8542

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trace-users-bounces at lists.onebuilding.org wrote on 12/15/2010 03:08:16 PM:

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> Today's Topics:
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>    1. Economic Comparison with ERV's (Jason Boehning)
>    2. Re: Economic Comparison with ERV's (JRR)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Tue, 14 Dec 2010 16:43:31 -0600
> From: Jason Boehning <Jason.Boehning at ricegardner.com>
> To: "trace-users at lists.onebuilding.org"
>    <trace-users at lists.onebuilding.org>
> Subject: [Trace-users] Economic Comparison with ERV's
> Message-ID:
>    <457DDD1943557042B717A5F43B84C5F00FB954BDB5 at ems08.ems-1.net>
> Content-Type: text/plain; charset="us-ascii"
> 
> All,
> 
> I am trying to use Trace to run some initial energy savings 
> calculations. I have a very large school campus, about 460,000 
> square feet. There is over 100,000 cfm of outside air. Right now the
> plant is coming on at 4am and running until about 6pm. I am trying 
> to show that if we add some type of energy recovery system to the 
> outside air, we can take the load down on the OA and control it 
> better. I am not getting very good numbers out of Trace. For 
> example, I just changed the OA schedule on the airflows tab from 
> 100% 4am - 6pm to 100% 8am - 3pm and I only got $5000 savings per 
> year. I realize that there is still a lot of outside air intake in 
> the hot parts of the day, but even adding an energy recovery wheel 
> does not help as much as we think it should. Anyone else had 
similarproblems?
> 
> Regards,
> 
> Jason Boehning
> Engineer in Training/Designer
> [cid:image001.gif at 01CB9BAE.0ADCD310]
> 6161 Savoy, Suite 1212
> Houston, Texas  77036
> 
>  v.  713.482.2322
>  f.   713.482.2314
>  e. 
Jason.Boehning at ricegardner.com<mailto:Jason.Boehning at ricegardner.com>
> 
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> ------------------------------
> 
> Message: 2
> Date: Tue, 14 Dec 2010 23:40:18 -0500
> From: JRR <energy.wwind at cox.net>
> To: Jason Boehning <Jason.Boehning at ricegardner.com>
> Cc: "trace-users at lists.onebuilding.org"
>    <trace-users at lists.onebuilding.org>
> Subject: Re: [Trace-users] Economic Comparison with ERV's
> Message-ID: <4D0846B2.3000908 at cox.net>
> Content-Type: text/plain; charset=windows-1252; format=flowed
> 
> Winter time ? right ?
> 
> Summer time the problem is you haven't removed any humidity - just got 
> closer to the dew point - so you haven't reduced the latent load........
> 
> 
> Jason Boehning wrote:
> >
> > All,
> >
> > I am trying to use Trace to run some initial energy savings 
> > calculations. I have a very large school campus, about 460,000 square 
> > feet. There is over 100,000 cfm of outside air. Right now the plant is 

> > coming on at 4am and running until about 6pm. I am trying to show that 

> > if we add some type of energy recovery system to the outside air, we 
> > can take the load down on the OA and control it better. I am not 
> > getting very good numbers out of Trace. For example, I just changed 
> > the OA schedule on the airflows tab from 100% 4am ? 6pm to 100% 8am ? 
> > 3pm and I only got $5000 savings per year. I realize that there is 
> > still a lot of outside air intake in the hot parts of the day, but 
> > even adding an energy recovery wheel does not help as much as we think 

> > it should. Anyone else had similar problems?
> >
> > Regards,
> >
> > Jason Boehning
> >
> > Engineer in Training/Designer
> >
> > Description: cid:image002.gif at 01CB500A.C6673A20
> >
> > 6161 Savoy, Suite 1212
> >
> > Houston, Texas 77036
> >
> > v. 713.482.2322
> >
> > f. 713.482.2314
> >
> > e. Jason.Boehning at ricegardner.com 
<mailto:Jason.Boehning at ricegardner.com>
> >
> > 
------------------------------------------------------------------------
> >
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> End of Trace-users Digest, Vol 29, Issue 5
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