[Equest-users] Hourly space temperature after cooling

Tue Mar 26 08:18:38 PDT 2019

Thanks Joe!

Your participation prompts me to ask the question that is at the heart of
this discussion - it looks like an attempt to "reverse engineer" a
definition. We have all done it. FYI - and it's a massive but educational
time pit. Does anyone [Joe] know the programmed definition for eQUEST,
[probably from DOE2] on unmet hours?
*i.e DOE2 will mark an Unmet hour if a zone is: Outside the throttling
range? How many degrees outside range (.1, 1 etc)? Plus Occupied? Plus Coil
capacities are exceeded? Plus Any other conditions?*

Agreed about the hourly reports. The hourly one for eQUEST that I use is
under thermal zone for the "amount of load that's unmet" for an hour.
Include the zone temperature that hour and that should get you what you
want (but possibly not what you need). There is probably an unmet hours
flag to enable (0 or 1), but I might be thinking of the wrong software
package? I try not to look at individual unmet hours for spaces - the
space/zone is usually not the actual problem.

A few notables from the images sent:

   - Fans are running over 7500 hours per year. I doubt the building is
   occupied that many hours.
   - Schedule seems to be a default schedule from the wizard? Defaults like
   this are often unoccupied on weekends and 12 hours per day.
   - That would be around 3000 occupied hours.
   - Similar default schedules allow 82 degrees for unoccupied hours -->
   Possibly >5500 hours requiring 85 to be outside the throttling range, and
   they are unoccupied

Best Regards,

Bob

Energy-models.com
Simulate.Energy
ᐧ

On Mon, Mar 25, 2019 at 3:40 PM Joe Huang via Equest-users <
equest-users at lists.onebuilding.org> wrote:

> Paul, others,
>
> Being an old DOE-2 user, I would recommend getting the hourly reports for
> zone temperature, setpoint temperature,  and cooling load, and then
> aggregating these by hour of day and month, i.e., get 12 average hourly
> profiles by month, which would tell you what's going on. I don't know if
> there's an hourly report variable for unmet load, but it should be
> detectable as hours where the zone temperature exceeds the setpoint
> temperature.  I know how to  set up hourly reports in DOE-2, but  don't
> know how can be done in eQUEST.
>
> Joe
>
> Joe Huang
> White Box Technologies, Inc.
> 346 Rheem Blvd., Suite 205A
> Moraga CA 94556yjhuang at whiteboxtechnologies.comhttp://weather.whiteboxtechnologies.com for simulation-ready weather data
> (o) (925)388-0265
> (c) (510)928-2683
> "building energy simulations at your fingertips"
>
> On 3/25/2019 6:27 AM, Bishop, Bill via Equest-users wrote:
>
> Hi Paul,
>
> The 75 °F input that you shared below for “Indoor Design Temperature” is
> the DESIGN-COOL-T which is used for sizing calculations (and is optional
> when using DOE-2.3). The hourly thermostat setpoint is part of the
> thermostat schedule so you need to look at the day schedules within the S1
> Sys1 (PSZ) Cool Sch.
>
> Regards,
>
> ~Bill
>
>
>
> *William Bishop, PE, BEMP, BEAP, CEM, LEED AP*
>
> *Senior Energy Engineer*
>
>
>
> [image: Pathfinder-EA-logo-2]*T: (585) 698-1956*                        F:
> (585) 325-6005
>
> bbishop at pathfinder-ea.com <wbishop at pathfinder-ea.com>
> www.pathfinder-ea.com
>
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>
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>
> *From:* Equest-users <equest-users-bounces at lists.onebuilding.org>
> <equest-users-bounces at lists.onebuilding.org> *On Behalf Of *Integral
> Mechanical Engineering Designs via Equest-users
> *Sent:* Saturday, March 23, 2019 2:34 PM
> *To:* David Eldridge <DEldridge at grummanbutkus.com>
> <DEldridge at grummanbutkus.com>; equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Hourly space temperature after cooling
>
>
>
> Hi David,
>
>
>
> Thanks for the answer. I don´t think that explain the data because the
> system is working most of the time during the year, and a note in the SS-O
> report shows that the temperature counts are made only for the hours when
> the fans are on. The cooling schedule matches with the  occupancy schedule.
>
> The set point is 75 °F and the throttle range is 2 °R.
>
> The BEPS report shows that are 155 unmet hours, but the SS-O report gives
> a value of at least 2505 (adding from 80-85 and above 85).
>
>
>
> Kind Regards,
>
> Paul Caicedo
>
> Mechanical Engineering Consultant
>
>
>
> *IntegralMECH*
>
>
>
> *From:* David Eldridge <DEldridge at grummanbutkus.com>
> *Sent:* March 22, 2019 9:29 AM
> *To:* Integral Mechanical Engineering Designs
> *Subject:* RE: Hourly space temperatura after cooling
>
>
>
> That SS-O report should be after cooling (it’s a “system” report), but it
> may include some hours when the control system is in setback – it’s not
> only for occupied hours, would that explain your data?
>
>
>
> There is a separate module for report variables that you can specify to
> document any number of internal calculations, including one or more space
> temperatures – it’s been a while since I set one of those up but if you
> search this community for “report variables” some instructions should pop
> up.
>
>
>
> These can then also be exported to excel, or printed in the *.sim report.
>
>
>
> David
>
>
>
>
>
> *David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP*
>
> Associate
>
>
>
> Direct: (847) 316-9224 | Mobile: (773) 490-5038
>
>
>
> *Grumman/Butkus Associates* | 820 Davis Street, Suite 300 | Evanston, IL
> 60201
>
> Energy Efficiency Consultants and Sustainable Design Engineers
>
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>
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>
> *From:* Equest-users [mailto:equest-users-bounces at lists.onebuilding.org
> <equest-users-bounces at lists.onebuilding.org>] *On Behalf Of *Integral
> Mechanical Engineering Designs via Equest-users
> *Sent:* Friday, March 22, 2019 8:51 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Hourly space temperatura after cooling
>
>
>
> Hi all,
>
>
>
> If I open the BEPS Building Energy Performance, there are 155 unmet hours.
> I would like to get the temperature values throughout the year after
> cooling, but the only related option that I can see is the SS-O Space
> Temperature Summary where the temperatures above the set point are much
> more than the unmet hours. It seems that is the report of the space before
> cooling.
>
>
>
> How could I get the space temperature after cooling to have relation with
> the unmet hours?
>
>
>
> Kind Regards,
>
> Paul Caicedo
>
> Mechanical Engineering Consultant
>
>
>
> *IntegralMECH*
>
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