[Equest-users] Hourly space temperature after cooling

Joe Huang yjhuang at whiteboxtechnologies.com
Fri Mar 29 01:19:44 PDT 2019


I can't confirm this, but my recollection is that DOE-2 will report an 
unmet hour anytime the zone temperature exceeds the thermostat setting 
plus the throttling range, if that's defined.

Joe

On 3/26/2019 8:18 AM, The Energy Simulation Academy wrote:
> 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 <http://Energy-models.com>
> Simulate.Energy <http://Simulate.Energy>
>>
> On Mon, Mar 25, 2019 at 3:40 PM Joe Huang via Equest-users 
> <equest-users at lists.onebuilding.org 
> <mailto: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 94556
>     yjhuang at whiteboxtechnologies.com  <mailto:yjhuang at whiteboxtechnologies.com>
>     http://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*
>>
>>     **
>>
>>     Pathfinder-EA-logo-2*/T: (585) 698-1956/**//*F: (585) 325-6005
>>
>>     bbishop at pathfinder-ea.com
>>     <mailto:wbishop at pathfinder-ea.com>www.pathfinder-ea.com
>>     <http://www.pathfinder-ea.com/>
>>
>>     134 South Fitzhugh Street
>>
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>>     right for you./
>>
>>     *From:* Equest-users <equest-users-bounces at lists.onebuilding.org>
>>     <mailto: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>
>>     <mailto:DEldridge at grummanbutkus.com>;
>>     equest-users at lists.onebuilding.org
>>     <mailto: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
>>     <mailto: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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>>
>>     *From:* Equest-users
>>     [mailto: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
>>     <mailto: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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