I’m also comparing the results of the PNNL models (90.1 2013 and pre-1980) with the OpenStudio "Create DOE Prototype Building” measure. I have the most recent measure from the BCL, and they’re all CZ 3C models run with the same SFO weather file, but there are still some pretty big differences:
- Pre-1980 large office: The energy consumption of the OS model is 16% higher than the PNNL model. This is driven primarily by the cooling and fans, which help make the OS HVAC twice as large as the PNNL HVAC. The interior equipment is virtually identical between the 2 models, so it’s not because of a difference in data center.
- 2013 secondary school: The energy consumption of the OS model is 16% higher than the PNNL model. This is driven primarily by the water heating being 4 times as large in the OS model. This is moderated a bit by the cooling being almost 3 times as large in the PNNL model.
- 2013 warehouse: The energy consumption of the OS model is 16% higher than the PNNL model. This is driven primarily by the heating and interior lights being about three times as much in the OS model.
- Strip mall: Overall differences aren’t very big (0 and 6%), but the heating is substantially more in the OS models than the PNNL ones.
Ideas about what might be going on?
