[Equest-users] Fuel Metering

R B slv3sat at gmail.com
Tue Jun 26 08:52:38 PDT 2012


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>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]
> Sent: Tuesday, June 26, 2012 10:41 AM
> To: 'Brian Fountain'; Samantha MacHardy
> Cc: 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
> www.sevengroup.com
>
> -----Original Message-----
> From: 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
> 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]
> Sent: Tuesday, June 26, 2012 10:16 AM
> To: '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]
> 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
>
> -----Original Message-----
> From: Samantha MacHardy <SMacHardy at pemi.com>
> Sender: equest-users-bounces at lists.onebuilding.org
> Date: Tue, 26 Jun 2012 09:11:11
> To: 'equest-users at lists.onebuilding.org'<
> equest-users at lists.onebuilding.org>
> Subject: [Equest-users] Fuel Metering
>
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