[Bldg-sim] Query for DesignBuilder

[Kiran Ghosh]

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.
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-- 
Thanks and Regards
Kiran K Ghosh
+919582904515
+918152036434
kirankghosh31 at gmail.com
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