Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Actually if you just want to swap out the HVAC system, you can import the IDF file into OpenStudio user interface without going through SketchUp. You would find that the HVAC system in the original model is going to disappear and you can redefine them in openStudio. As far as comparing the OpenStudio results and the original reference building model. In addition to the missing holidays, the object "Site:GroundTemperature:BuildingSurface" in the original reference building is going be missing, which could contribute to some differences. For the 3x higher energy use from the OpenStudio, I suspect that it may result from the air loop being sized as 100% outdoor air. See this thread. If that is not the reason, canalways compare the original reference building model IDF file and the OpenStudio generated IDF file directly, which may take some time.
| | 2 | No.2 Revision |
Actually if you just want to swap out the HVAC system, you can import the IDF file into OpenStudio user interface without going through SketchUp. You would find that the HVAC system in the original model is going to disappear and you can redefine them in openStudio. As far as comparing the OpenStudio results and the original reference building model. In addition to the missing holidays, the object "Site:GroundTemperature:BuildingSurface" in the original reference building is going be missing, which could contribute to some differences. For the 3x higher energy use from the OpenStudio, I suspect that it may result from the air loop being sized as 100% outdoor air. See this thread. If that is not the reason, canalways you can always compare the original reference building model IDF file and the OpenStudio generated IDF file directly, which may take some time.
