[Equest-users] Interpreting SIM reports

[Erik Kolderup]

Hi, Nick.

I think that the capacity of the cooling loop will be based on the sum of
the capacities of cooling coils connected to the loop, assuming the sizing
option for the loop is "secondary" rather than "primary". If you look at
the SV-A report and sum up capacity of all the cooling coils, does that get
you to 13 MBtu/hr? If you want the loop sized based on chiller size, then
the sizing option for the loop should be "primary".

-Erik


*Erik Kolderup, PE, LEED AP*
erik at kolderupconsulting.com | 415.531.5198 | www.kolderupconsulting.com


On Thu, Jun 13, 2019 at 11:02 AM Nicholas Caton via Equest-users <
equest-users at lists.onebuilding.org> wrote:

> Hi everyone,
>
>
>
> Can anyone help me assert or correct my understanding on something?  This
> is from a model built in v3.65, b7175, doe2.2 engine (with intent to
> upconvert the project to doe2.3 before I’m done).
>
>
>
> Report PV-A lists the capacity for each heating/cooling loop.  Here I’m
> cropping to just the loops, and highlighting what I’m used to thinking of
> as the “peak” coincident capacity requirement for a chilled water loop –
> 13.909 MMBtu/hr (that’s millions):
>
>
>
>
>
> The following reports PS-H go into more detail on each item listed in
> PV-A.  Here is the report for the same “Chilled Water Loop,” with a coule
> more highlights:
>
>
>
>
>
> Immediately, I note that *13.909 MMBtu/hr* (1,159 tons) aligns with PV-A,
> however I do not see that number matching (intuitively) any of the other
> figures or sums provided on this sheet.  The figure 5,625.126 kBtu/hr
> (469 tons) aligns with my expectations for peak load on the loop, where
> nominal capacity of the associated chillers on this loop are in the same
> ballpark (one is 444 tons and one is 210 tons on paper & @ design
> conditions, and I’m told they commonly do not need to engage the smaller
> chiller during the dead of summer).
>
>
>
> Can anyone help me reconcile the differences between what’s reported as
> “Cooling Capacity” in PV-A, in relation to the annual peak loads indicated
> for the same loop in the PS-H report?
>
>
>
> Thanks!
>
>
>
> ~Nick
>
>
>
> [image: cid:image005.png at 01D515A3.47EDD880]
>
> *Nick Caton, P.E., BEMP*
>
>   Senior Energy Engineer
>   Regional Energy Engineering Manager
>
>   Energy and Sustainability Services
>   Energy Performance Contracting
>
> D
> M
> F
> E
>
> 913 . 564 . 6361
>
> 785 . 410 . 3317
>
> 913 . 564 . 6380
>
> *nicholas.caton at se.com <nicholas.caton at se.com>*
>
> 15200 Santa Fe Trail Drive
> Suite 204
> Lenexa, KS 66219
> United States
>
> [image: cid:image006.png at 01D515A3.47EDD880]
>
>
>
>
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