[BLDG-SIM] eQuest report errors

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):

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?

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