[Equest-users] Modelling Geothermal with back up boiler and coolingtower

[Maudud Quazi]

Thank you Kathryn and Anthony.  I will give it a try and see how it works.

Take care.

Hassan

On Thu, Oct 13, 2011 at 6:23 PM, Anthony Hardman
<Anthony at greenengineer.com>wrote:

> Hassan, Kathryn’s suggestion to use baseboards attached to a boiler are
> probably your best bet.  I just wanted to add that you can add a cooling
> tower to your ground loop just like you would any other condenser loop.  *
> ***
>
> ** **
>
> *Anthony Hardman, PE*
>
> *LEED AP BD&C***
>
> Building Performance Analyst****
>
> *The Green Engineer, LLP*
>
> Sustainable Design Consulting****
>
> 50 Beharrell St****
>
> Concord, MA 01742****
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> O: 978/610-2801****
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> ** **
>
> *From:* Kathryn Kerns [mailto:kathryn.kerns at bceengineers.com]
> *Sent:* Thursday, October 13, 2011 12:07 PM
> *To:* Maudud Quazi; equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Modelling Geothermal with back up boiler and
> coolingtower****
>
> ** **
>
> I have been thinking about this problem and I haven't had a chance to try
> it, but I wonder if you couldn't add baseboard heating to the building and
> attach a boiler and only run the baseboard system at low OSA temperatures
> when you know the ground loop system isn't going to be big enough to take
> care of heating. That might take care of the extra boiler heating problem.
> The only thing I can think of to do for the cooling is to add a DOA to your
> HVAC system that has a cooling coil connected to a fluid cooler and running
> it when the OSA temperature is high.****
>
>  ****
>
> I suggest the above system because I am pretty sure you can't add a boiler
> or a fluid cooler to a ground loop.****
>
>  ****
>
> It also might be possible to start with a WLHP system and see if you can't
> add an additional fluid cooler and a boiler. Then increase the efficiencies
> of the additional fluid cooler and boiler so the take on the energy
> characteristics of a ground loop and arrange for these more
> efficient devices to run during median OSA temperature conditions.****
>
>  ****
>
> Hmmm, anybody have any other ideas? Carol, nice to see hear from you again.
> ****
>
> ** **
> ------------------------------
>
> *From:* equest-users-bounces at lists.onebuilding.org on behalf of Maudud
> Quazi
> *Sent:* Wed 10/12/2011 12:44 PM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Modelling Geothermal with back up boiler and
> coolingtower****
>
> Hello all,
>
> I am modelling a HVAC system that uses geothermal as primary source of
> heating and cooling.  However, it uses a boiler for winter peak and a
> cooling tower for summer peak hours.  Both of these uquipments are connected
> to the geothermal loop.  Can anyone please give me some idea as to how I can
> model this system.  Before, I tried connecting a boiler to GSHP loop in the
> detailed mode but eQuest did not allow me to do that.  Thanks for your help.
>
> Regards,
>
> Hassan****
>
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