[Bldg-sim] Query for DesignBuilder

Javed Iqbal javedvit at gmail.com
Wed Sep 5 23:24:11 PDT 2018


Let's nail down this problem to E+ because DesignBuilder gives you just an
interface to translate everything to E+ language. Would you mind sharing
your IDFs?

On Thu, Sep 6, 2018 at 10:31 AM Kiran Ghosh via Bldg-sim <
bldg-sim at lists.onebuilding.org> wrote:

> Hi,
>
> I have checked the inputs and schedule for each IDF file. It is literally
> the same model with just the U-value for external walls edited. Could the
> heat gain through the walls effect the electricity consumption for lighting
> and equipment in any way (since that is the only thing changing because of
> a different u value)?
>
> Kiran K Ghosh
> Research Associate
> TERI
>
>
> ---------- Forwarded message ----------
> From: Jim Dirkes <jim at buildingperformanceteam.com>
> To: Kiran Ghosh <kirankghosh31 at gmail.com>
> Cc: BLDG-SIM <bldg-sim at lists.onebuilding.org>
> Bcc:
> Date: Wed, 5 Sep 2018 16:06:19 -0400
> Subject: Re: [Bldg-sim] Reg: Query For DesignBuilder
>
>> 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:*
>>
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>>
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>>
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>
>
> --
> Thanks and Regards
> Kiran K Ghosh
> +919582904515
> +918152036434
> kirankghosh31 at gmail.com
> _______________________________________________
> Bldg-sim mailing list
> http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to
> BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG
>


-- 

Javed Iqbal, LEED AP, CEA
Sr. Energy Analyst
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