[Bldg-sim] Reg: Query For DesignBuilder

[Víctor Moreno Solana]

Hi.
If you modify the U-value, Design Builder modify the insulation
layer thickness to coincide with U-value specified. So, the total wall
thickness can be modified dependent on how you have configured the Geometry
convention template (
https://www.designbuilder.co.uk/helpv5.5/#GeometryAreasAndVolumes.htm%3FTocPath%3DBuilding%2520Models%7CModel%2520Data%7CBuilding%2520Model%2520Data%7CConstruction%2520Data%7CConstructions%7C_____5).
If the Geometry convention template is not "Simple", the wall thickness
will be modify, so the net area is modified too, so for a specified lpd the
total power is different.


*Victor Moreno <http://es.linkedin.com/in/VictorMoreno3>*



*Green Building & Energy ConsultantLEED AP BD+C
<http://www.usgbc.org/leed>, BREEAM Asesor <http://breeam.es/>, CEM
<http://www.aeespain.org/certificados>, CMVP
<http://www.aeespain.org/certificados>, CxA
<http://www.usgbc.org/Docs/Archive/General/Docs1262.pdf>gestienergetica at gmail.com
<gestienergetica at gmail.com>*


El jue., 6 sept. 2018 a las 7:18, Kiran Ghosh via Bldg-sim (<
bldg-sim at lists.onebuilding.org>) escribió:

> Hi Jim,
>
> I have checked each IDF file and the inputs and schedules. It is literally
> the same model with only the U values for external walls changed. Could
> this possibly affect the equipment and lighting load?
>
> On Thu, 6 Sep 2018 at 01:38, Jim Dirkes <jim at buildingperformanceteam.com>
> wrote:
>
>> [image: Boxbe] <https://www.boxbe.com/overview> Jim Dirkes (
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>> All lighting and equipment values are within 1% of each other. That's
>> probably close enough to be considered "the same", considering the complex
>> E+ calculations and some rounding errors, but it is less close than seems
>> reasonable. Have you compared inputs and schedules for each of those in
>> each IDF?
>>
>> On Wed, Sep 5, 2018 at 8:56 AM, Kiran Ghosh via Bldg-sim <
>> bldg-sim at lists.onebuilding.org> wrote:
>>
>>> Hi,
>>>
>>> I am currently modelling a simple HVAC model on DesignBuilder. I need to
>>> run the simulation to obtain annual electricity consumption due to Cooling,
>>> Lighting and Interior Equipment for different construction materials. For
>>> some reason, while all the input is the same apart from the U value for the
>>> external wall, the electricity end-use for lighting and interior equipment
>>> changes as follows:
>>>
>>> U value Lighting Equipment
>>> 2.04 496.38 885.89
>>> 2 494.72 880.84
>>> 1.85 487.9 860.3
>>>
>>> The LPD and Equipment Power Density remains the same with the same
>>> schedule, why is the annual electricity consumption changing?
>>> --
>>> Thanks and Regards
>>> Kiran K Ghosh
>>> +919582904515
>>> +918152036434
>>> kirankghosh31 at gmail.com
>>>
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>>>
>>
>>
>> --
>>
>> James V Dirkes II, CEO / President
>> The Building Performance Team Inc.
>> 1631 Acacia Dr, Grand Rapids, MI 49504
>>
>> (alphabet soup of efforts for greater understanding: PE, BEMP, BCxP, LEED
>> AP)
>>
>> Direct / Mobile: 616.450.8653
>> jim at buildingperformanceteam.com
>>
>> Website <http://buildingperformanceteam.com>l  LinkedIn
>> <https://www.linkedin.com/pub/jim-dirkes/7/444/413>
>>
>> *Coffee conversation:*
>>
>> Former gang member counseling a friend about how to improve his public speaking: "You have to pepper your talk with self-defecating humor. "
>>
>> Friend: "No shit."
>>
>>
>
> --
> Thanks and Regards
> Kiran K Ghosh
> +919582904515
> +918152036434
> kirankghosh31 at gmail.com
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