[Equest-users] Interpreting SIM reports

[Sharad Kumar]

Hi Nick,


The PV-A report deals with the cooling capacity which is the tons of
refrigeration of the chillers total capacity which is coming as 13.909
MMBtu/ hr.


The peak load that PS-H command is giving is the cooling load month wise of
the chiller or cooling coils totally.

As per PS-H report the monthly peak load coming in terms of kBtu/hr is the
maximum cooling load of the cooling coil or chiller that is found on the
peak day of the month. It is sort of maximum cooling load of the month on
the day when there the peak cooling load is observed.

The MMBtu/hr thing priorly observed is the cooling capacity of the chiller
(PV-A) whereas the kBtu/hr thing observed is the maximum cooling coil load
of the HVAC month-wise provided in the PS-H report.


*Thanks*,
Sharad Kumar
Freelancer
India.

......................................................................................................................................

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):



<image002.jpg>



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:



<image003.png>



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



<image004.png>

*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

<image005.png>





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