[BLDG-SIM] eQuest report errors

[Sheila Sagerer]

Good afternoon Everyone,

 

Last night, I encountered two eQuest errors I've never seen before.  My
project uses a chiller and boiler with 5 main VAV/reheat AHUs for large main
areas and about 25 fan-coil units for individual smaller areas.  Four of the
5 AHUs have enthalpy wheel heat recovery.  There are also 4 ERVs to supply
tempered OA to the fan coils.  I was troubleshooting for too many hours
outside throttling range when the first error occurred (v3.6):

 

1.	When checking the reports, I noticed "-nan" in the BEPS, BEPU & ES-D
reports in the miscellaneous equipment and space cooling electric columns.
At first I assumed that there was an error that caused excessive electric
use for those categories.  However, I removed ALL miscellaneous equipment
loads and schedules from the entire project, reran the simulation and still
had the "-nan" in the reports in both the miscellaneous equipment and space
cooling electric columns.  I re-entered my data and again saw no change in
the sim reports.  It finally disappeared when I saved the project as a new
file and reran.  Any ideas?

 

2.	The second error occurred when I tried to add DCV to AHU-3.  I
thought the simulation ran fine.  However, when checking the reports, I
noticed that both space cooling and domestic hot water use completely
disappeared - not even zeros in the BEPS report columns.  I reran the
simulation and ended up with 0's for both categories.  When I removed the
DCV, both categories came back.  What does domestic hot water use have to do
with DCV in an Auditorium????  Again, any ideas?

 

Thanks and have a nice day.

 

Sheila Sagerer

Energy Engineer, EIT, LEED AP

Energy Opportunities, Inc, a 7group company

Phone: 717-880-9069

Fax: 717-291-9497

www.sevengroup.com

 



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