[Equest-users] eQUEST: Heat Recovery Chiller

Eric O'Neill elo at MichaelsEngineering.com
Tue Oct 6 07:36:10 PDT 2009


Has anyone been successful in using this in conjunction with a
water-side economizer option selected on the air-side units? I had this
working in a model, but only after I turned off the water side
economizer. I couldn't get the chiller (connected to both HW, CHW, and
CW loops) to reject the required heat to the hot water loop AND have any
remaining heat rejected to a tower. I definitely didn't get to spend as
much time with it as I would have liked, but my initial results seemed
to indicate this control option is unavailable.

 

Cheers,

 

Eric

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Tony
Kriel
Sent: Tuesday, October 06, 2009 8:34 AM
To: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] eQUEST: Heat Recovery Chiller

 

If I were to setup another heat recovery chiller I would use the
following steps.  If anyone would like to add some comments or some
additional steps, please feel free to do so.

1.      Assumptions: You're in detailed mode, and you have a water
cooled chiller setup with a chilled water loop, condenser water loop,
and a hot water loop.

2.      Create a new chiller. Type = Elec Heat Recovery

3.      Assign loops. CHW = Chilled Water Loop, CW = Condenser Water
Loop, HtRec = Hot Water Loop.

4.      Verify/input the EIR, equipment capacity, whether the chiller is
at Design or Rated conditions.

5.      Change the chilled water temperature, condenser temperature, min
condenser temperature, and maximum het recovery setpoints if necessary.

6.      Create/change EIR and Capacity curves if necessary.

 

Regards,

 

 

Tony Kriel 

________________________________

From: Otto Schwieterman [mailto:oschwieterman at fhai.com] 
Sent: Tuesday, October 06, 2009 8:17 AM
To: Tony Kriel; equest-users at lists.onebuilding.org.
Subject: eQUEST: Heat Recovery Chiller

 

Tony, have you figured out or received a step-by-step process for
simulating a heat recovery system?
 
Thanks, Otto
 
________________________________________________________________________
______
 
Tony-
 
When you define a chiller in eQuest, along with assigning the
appropriate
CHW (and possibly CW and HW) there is also a loop assignment for
"HtRec".
This takes either a HW, WLHP, or DHW Loop to which the chiller will
attempt
to provide recovered heat to.  There are some variables you will need to
fill in depending on how much heat you want to recover, etc...
 
If that doesn't answer your question, please let me know.
 
Regards,
 
-- 
Steve Mignogna
Atelier Ten
 
 
 
On Mon, Mar 9, 2009 at 4:55 PM, Tony Kriel <tkriel at sustaineng.com
<http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org>
> wrote:
 
>  I know this has been asked once or twice before, but I haven't had
too
> much luck finding an appropriate archived response.
> 
> 
> 
> Has anyone successfully modeled a heat recovery chiller in Equest that
> would reject heat to a domestic hot water loop and would like to share
a
> step by step process for simulating such a system?
> 
> 
> 
> Thanks,
> 
> 
> 
> Tony Kriel, LEED AP
> 
> Mechanical Engineer
> 
> tkriel at sustaineng.com
<http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org>

> 
> (608) 231-9664 ext. 16
> 
> 
> 
> Sustainable Engineering Group, LLC.
> 
> 431 Charmany Drive, Suite 102
> 
> Madison, WI 53719
> 
> www.sustaineng.com

 

 

 

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