[Equest-users] Fuel Metering

[Sami, Vikram]

Also - if you have a VAV with hydronic reheat, your zonal reheat will show up as space heating. Make sure you select the correct loop (secondary) for that - otherwise it will default to the main loop and not show up in your secondary loops.


Vikram Sami, LEED AP BD+C
Sustainable Design Analyst
1315 Peachtree St. NE, Atlanta, GA 30309
t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com   www.perkinswill.com<http://www.perkinswill.com/>
Perkins+Will.  Ideas + buildings that honor the broader goals of society


From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of R B
Sent: Tuesday, June 26, 2012 11:53 AM
To: Samantha MacHardy
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Fuel Metering

What is the boiler efficiency? If the average efficiency for the year is 60%, your 2500 will be more like 4000 MBTU at the boiler.
Rohini
On Tue, Jun 26, 2012 at 10:28 AM, Samantha MacHardy <SMacHardy at pemi.com<mailto:SMacHardy at pemi.com>> wrote:
Modeling the system with three secondary loops has distributed loads to each building so thank you Brian for the help! Sheila, using the meter in isolation for the boiler is helping to see the loads just on that boiler. While these are helpful, the loads aren't quite lining up. From the BEPS report, I can see that ~5000 MBTU is used for space heating but the sum of the secondary building loops is only producing ~1500 MBTU and even if I include the primary hot water loop in that total it only totals ~2500. Any idea where the difference could be hiding?

Thanks :)

Samantha

-----Original Message-----
From: Sheila Sagerer [mailto:sheila at energyopportunities.com<mailto:sheila at energyopportunities.com>]
Sent: Tuesday, June 26, 2012 10:41 AM
To: 'Brian Fountain'; Samantha MacHardy
Cc: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: RE: [Equest-users] Fuel Metering

In order to truly isolate the natural gas for the boiler, I would model this using a separate meter created just for the boiler plant along with the three secondary hot water loops (one for each building).  Then, the fuel use for the boiler could be distributed manually to each of the buildings through post-processing using the PS-H reports for each building as suggested by Brian below.

Any additional fuel meters created and assigned to each building would only log the fuel use for domestic hot water, cooking, or other end uses not connected to the central plant boiler.

Good luck and have a nice day.

Sheila Sagerer
Energy Engineer, EIT, LEED AP
Energy Opportunities, Inc, a 7group company
Phone: 717-880-9069<tel:717-880-9069>
www.sevengroup.com<http://www.sevengroup.com>

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>
[mailto:equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>] On Behalf Of Brian Fountain
Sent: Tuesday, June 26, 2012 10:20 AM
To: 'Samantha MacHardy'
Cc: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] Fuel Metering

Then it would seem you are modelling the boiler loading (lead - lag) rather than the building loading.  If you wish to isolate the buildings, I think you need 3 hot water loops.  If you wish, they could be secondary loops feeding off a common primary loop, that way you would not have to dedicate boilers to the individual buildings but you could look at the heating loads for the secondary loops on the PS-H reports to see what their heating loads are like.

Hope this helps.

Brian

-----Original Message-----
From: Samantha MacHardy [mailto:SMacHardy at pemi.com<mailto:SMacHardy at pemi.com>]
Sent: Tuesday, June 26, 2012 10:16 AM
To: 'bfountain at greensim.com<mailto:bfountain at greensim.com>'
Subject: RE: [Equest-users] Fuel Metering

No, each is fed off of the same loop in the model.

-----Original Message-----
From: bfountain at greensim.com<mailto:bfountain at greensim.com> [mailto:bfountain at greensim.com<mailto:bfountain at greensim.com>]
Sent: Tuesday, June 26, 2012 10:03 AM
To: Samantha MacHardy
Subject: Re: [Equest-users] Fuel Metering

Are there separate hot water loops for the 3 buildings?
Brian Fountain
bfountain at greensim.com<mailto:bfountain at greensim.com>

-----Original Message-----
From: Samantha MacHardy <SMacHardy at pemi.com<mailto:SMacHardy at pemi.com>>
Sender: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>
Date: Tue, 26 Jun 2012 09:11:11
To: 'equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>'<equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>>
Subject: [Equest-users] Fuel Metering

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