[Equest-users] Modeling solar thermal on a campus system

Karen Walkerman kwalkerman at gmail.com
Fri Oct 24 12:18:39 PDT 2008


no, but you can change the temperature of the hot water loop in the detailed
edit mode.  I have done this to simulate low temperature water systems and
then used another program (such as RetScreen) to evaluate solar hot water
output.  Unfortunately, I know of no way to directly integrate the two.  The
problem arises that often when the sun is shining enough to produce heat
through the SHW system, the building does not need much heat.  A thermal
storage tank can help mitigate this issue, but brings its own challenges.

I am surprised, however to learn that baseboard heat will be the method of
delivery.  I am familiar with using SHW to supplement radiant panels, and
low-temperature water coils, but not baseboards.

Good luck!

--
Karen

On Fri, Oct 24, 2008 at 2:01 PM, Aulbach, John <jaulbach at nexant.com> wrote:

>  Can't do solar hot water in eQuest. Bummer !!
>
>  ------------------------------
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Kot, Douglas
> *Sent:* Friday, October 24, 2008 10:56 AM
> *To:* equest-users at lists.onebuilding.org
> *Cc:* Sanchez, Jorge J.
> *Subject:* [Equest-users] Modeling solar thermal on a campus system
>
>  All,
>
>
>
> We are working on an eQuest model for a high rise residential building
> (part of a campus hot water loop) that uses a solar thermal system for
> both space heating and domestic hot water . The proposed space heating
> system is baseboard radiant heating.
>
>
>
> So far our approach to modeling this is to change the inlet water
> temperature to the water heater to match the supply temperature coming out
> of the solar system.  That only addresses the domestic hot water, not the
> space heating. We can't find the way to change the inlet temperature to
> the baseboard system, but we believe that there's probably a way of doing
> it.
>
>
>
> Does anyone have any advice on how to accomplish this? Any tips on modeling
> solar thermal in eQuest (or otherwise) are welcome and greatly
> appreciated!
>
>
>
> Thanks in advance!
>
>
>
> Best Regards,
>
> *Douglas Kot, AIA*
> LEED(R) AP
> Sustainable Design Consultant
>
> *KEMA Services Inc.*
> 3605 5th Avenue, Suite A
> San Diego, CA 92103
> Office +1 619 688 0960 x 15515
> Mobile +1 619 246 1858
>
> douglas.kot at kema.com
> www.kemagreen.com
>
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>
>
>
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