outdoor dry bulb temperature differs from epw file [closed]

asked 2019-10-07 09:28:38 -0600

Manttech's avatar

updated 2020-01-07 19:54:41 -0600

I'm doing a simulation with OpenStudio and EnergyPlus. After the simulation I used Design Builder Result Viewer to graph "Site Outdoor Air Drybulb Temperature" and in the graph seem to be some data missing because there is 3 days with a constant temperature of -2.3°C, 12.6°C and 6,8°C in the middle of the summer. However I opened the EPW file in Elements and everything looks fine in those days and in the minimum/max Dry Bulb Temperatures for each month. Note: I'm in southern hemisphere, so summer is from december to march.

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Closed for the following reason the question is answered, right answer was accepted by Manttech
close date 2019-10-16 08:24:07.474343


Is it possible that you are seeing the results for 3 design days specified in the model?

shorowit's avatar shorowit  ( 2019-10-08 21:19:55 -0600 )edit

I believe Design Builder Result Viewer used to combine the design days into the annual results. You could try to view the eplusout.sql in excel or Dview to confirm.

kramerica's avatar kramerica  ( 2019-10-09 16:01:13 -0600 )edit

I just deleted the design days and re-run the simulation and the problem is gone.I think this is not a problem for me because I only want the load for the building and I'm no sizing any system. However, shows me that I have no idea how design days work because I though they had no influence on the building simulation and the only purpose was to size equipment. Thank you guys.

Manttech's avatar Manttech  ( 2019-10-11 08:09:31 -0600 )edit