[Equest-users] LEED and Seasonal operation / DHW heater seasonal operation

Nick Patsos nick.patsos at gmail.com
Thu Jan 30 07:53:25 PST 2014


Thank you all very much for the answers, they were very helpful.

I m attaching the project files for anyone to have a look. The problem is
that during July and August the DHW boiler should be completely off since
dhw loop and pump show zero at simulation output.

eQuest version used is 3.64.

Weather file also included in the rar as well as simulation output.

Nikos Patsos
Mechanical Enginner


On 30 January 2014 03:58, David Eldridge <DEldridge at grummanbutkus.com>wrote:

>  Will the DHW really be shut off? I can see the AHUs might be turned off
> during the summer...if you can show a control sequence of operation that
> turns off the AHUs it would help the documentation. However if the DHW is
> switched off manually for the season there might be some pushback that
> modeling losses would be appropriate in case it doesn't actually get
> deactivated, or if there might be the occasional event at the school during
> the summer time?
>
>
>
> You might want to simulate the year-round HVAC operation case so you have
> a fall back savings percentage number in mind in case things are questioned
> - you'll know if you have a cushion to make that change or not.
>
>
>
> David
>
>
>
>
>
>
>
>
>
>
> David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP
>
> *Grumman/Butkus Associates*
>
>
>
>
>
>
>
>
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *James Hansen
> *Sent:* Wednesday, January 29, 2014 4:30 PM
> *To:* Nick Caton; Nick Patsos; equest-users at lists.onebuilding.org
>
> *Subject:* Re: [Equest-users] LEED and Seasonal operation / DHW heater
> seasonal operation
>
>
>
> Recirculation set to 0.01 may be the problem?  Can't you force equipment
> on/off via load management / scheduling?
>
>
>
> Also, like Nick said, there shouldn't be an issue with unoccupied periods
> for schools, but make sure whoever does your FTE calcs takes that into
> consideration, and that all Water Efficiency calculations have +/- 40 weeks
> per year in lieu of 52.
>
>
>
> GHT Limited
>
> *James Hansen, PE, LEED AP, BEMP*
>
> *Senior Associate*
>
> *1110 N. Glebe Road, Suite 300*
>
> *Arlington, VA 22201*
>
> *703.243.1200 (main)*
>
> *703.338.5754 (direct/cell)*
>
> *www.ghtltd.com* <http://www.ghtltd.com>
>
>
>
> *From:* equest-users-bounces at lists.onebuilding.org [
> mailto:equest-users-bounces at lists.onebuilding.org<equest-users-bounces at lists.onebuilding.org>]
> *On Behalf Of *Nick Caton
> *Sent:* Wednesday, January 29, 2014 5:24 PM
> *To:* Nick Patsos; equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] LEED and Seasonal operation / DHW heater
> seasonal operation
>
>
>
> 1.      I don't think LEED precludes you from modeling a building being
> unoccupied for a good chunk of the year (assuming baseline and proposed
> have matching schedules), but I would anticipate this to raise some flags
> without substantial explanation and backup.  Acquiring something from the
> district/owner in writing to submit alongside regular documentation to back
> up your scheduling might save you a headache later.
>
> 2.      If there's no pump operation (verified by hourly reports) or
> scheduled DHW demand, I think that only leaves the pilot light... ?  That
> would show up as misc. gas consumption by default, if occurring.  You might
> post your project to get a second set of eyes on the problem.
>
>
>
> Hope that helps!
>
>
>
> ~Nick
>
>
>
> [image: cid:489575314 at 22072009-0ABB]
>
>
>
> *NICK CATON, P.E.*
>
> SENIOR ENGINEER
>
>
>
> Smith & Boucher Engineers
>
> 25501 west valley parkway, suite 200
>
> olathe, ks 66061
>
> direct 913.344.0036
>
> fax 913.345.0617
>
> www.smithboucher.com
>
>
>
> *From:* equest-users-bounces at lists.onebuilding.org [
> mailto:equest-users-bounces at lists.onebuilding.org<equest-users-bounces at lists.onebuilding.org>]
> *On Behalf Of *Nick Patsos
> *Sent:* Wednesday, January 29, 2014 9:29 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] LEED and Seasonal operation / DHW heater
> seasonal operation
>
>
>
> Hi all,
>
>
>
> I'm currently modelling a school building in eQuest for the LEED for
> Schools 2009 certification. The school doesn't operate at all in the summer
> season (closed) and so it isn't equipped with equipment for cooling.
>
>
>
> I have made schedules modelling this principle (not operating in
> JUNE/JULY/AUGUST) at both proposed and baseline scenarios but I'm concerned
> if it is mandatory or not to model a full year's operation under LEED. In
> the months of operation, I have modelled both cooling/heating as it is
> mandatory.
>
>
>
> A second question is how to make the DHW heater not to operate at the
> summer months. Having tried everything and after doublechecking that there
> is no DHW demand from the annual schedule for the summer months, the result
> is that the DHW loop and pump show no use for these months (seen at the
> simulation output) but still the DHW heater is operating consuming
> significant gas for an unknown reason. Loop is set to demand operation and
> recirculation set at 0.01.
>
>
>
> Any help highly appreciated. Thanks in advance!
>
>
>
> Nikos Patsos
>
> Mechanical Engineer
>
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