[Equest-users] Modeling only the Common Areas in a Building

Mon Feb 14 23:41:38 PST 2022

Through the eQuest interface, you can accomplish much of what John is suggesting through the HVAC tab.  You’ll find a tab for each HVAC SYSTEM which will allow you to assigning the electrical and fuel loads for all associated ZONES (and for the SYSTEM) to a distinct set of meters.  By default, for projects developed with the Wizards, you can expect all loads will be assigned to the default meters EM1 and FM1.  Those dropdowns can be engaged after defining a new set of meters.

I think in practice you might find it easier to assign the loads/systems of interest (common areas for your case) to the default meters EM1 and FM1.  If you assign all other loads to a new set of meters, then I think you’ll find much of the default reporting through the “rainbow reports” will still reflect the energy usage of interest.

I’d also caution however that for certain HVAC arrangements common in some regions for apartments and hotels which utilize corridor HVAC to satisfy ventilation/pressurization requirements, you might find it difficult to simply draw a zonal/system line that cleanly separates the energy picture.  I guess the universal advice here would be to “follow the money” for whatever meters you intend to calibrate against, to ensure the correct energies are accounted for.

Hope this helps!

~Nick

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Nick Caton, P.E. (US), BEMP
ニック ケートン, P.E. (US), BEMP
Senior Energy Engineer
Energy Manager, Yokota Airbase
ESS - Energy & Sustainability Services
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From: Equest-users <equest-users-bounces at lists.onebuilding.org> On Behalf Of John Aulbach via Equest-users
Sent: Friday, February 11, 2022 6:32 AM
To: Fraij via Equest-users <equest-users at lists.onebuilding.org>; Ahmad Fraij <fraij at yahoo.com>
Subject: Re: [Equest-users] Modeling only the Common Areas in a Building

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Hi Ahmed:

I think you still need interactive effects from the apartments. Are the common areas all on one electric meter? Any gas? You also didn't mention whether this was in a hot of cold climate.

I would do the whole building and cookie cutter the apartments into, say, facing directions. Make the electric usage EM1 and gas FM1. Then make the commons areas EM2 and FM2. Read up on how to aggregate the energy by meter.

I believe you would then have the EM2 and FM2 for monthly calibration to the meters.

Hope that helps.

John

On Thursday, February 10, 2022, 12:56:42 PM PST, Ahmad Fraij via Equest-users <equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>> wrote:

Hello Guys,

I am modeling a residential apartments building and I have the energy consumption only for the common areas of this building. I need to calibrate the eQUEST model to this common areas monthly energy consumption data so, what will be the best solution? I am thinking about the below two solutions:

  *   Can I connect all the common areas systems (HVAC, lighting...etc) to one meter and use the data of this meter to calibrate the model to the actual energy consumption? If yes, then in which simulation report can I find the monthly readings of this meter?
  *   The other option I can do is to not assign any HVAC, lighting...etc to the residential apartments and I only assign these systems to the common areas and then run the simulation.

So, did anybody encounter this before? which option of the above is the best? Or may be you can help me with another better solution?

Thanking you guys for any help

Regards

Ahmad
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