Unmet load hours for baseline lab systems

[GoogleCodeExporter]

A user sent a model (saved in the Google Drive, issue tracker files directory) 
which has unmet cooling load hours in the 900-1100 range in three lab spaces.  
He original message:

"I have a quick question about modeling laboratory with 100% outside  air and 
hoping you can shed some lights.  I modeled the lab spaces with its own air 
system and an exhaust of 10 ACH.  I kept getting many unmet clg hours (~1000) 
for the lab spaces so the building won’t comply.  Is there’s a rule of 
thumbs (or guide) for modeling spaces with 100% OAT?  Also, is there a way to 
see the HVACs energy consumption without completing the analysis [the log file 
says the model PASS the compliance but there was an error message: “In 
Standard model, 3 zones(s) exceed maximum cooling unmet load hours (150)”]?"

Original issue reported on code.google.com by rhedr...@archenergy.com on 29 Oct 2014 at 6:38

[GoogleCodeExporter]

This is a known issue that we discussed about 2 weeks ago.  KB and I are still 
troubleshooting this; initial indications are that there is a E+ bug that 
contributes to the problem.  We are investigating possible fixs/work-arounds, 
hope to have more information early next week. 

Original comment by da...@360-analytics.com on 29 Oct 2014 at 6:54

• Changed state: Discussion

[GoogleCodeExporter]

Sent to user: The unmet load hours issue is on the baseline (Standard Design) 
model, and is the result of a bug that is being actively investigated.  
Currently, it appears that this is due to a bug in EnergyPlus.  Possible fixes 
and workarounds are being investigated.  We will let you know when there is a 
solution to your problem.

Original comment by rhedr...@archenergy.com on 29 Oct 2014 at 6:59