[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>
> ᐧ
>
> 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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>>
>> *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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