PAT not calibrating Roof Insulation
Dear All, I have been trying to calibrate a smalloffice DOE prototype. I changed the original model on 4 levels including Roof Insulation, Ext Wall Insulation, WWR-North and WWR-East. During the calibration, electricity and natural gas consumption were being calibrated within 5%. The calibration successfully guessed the WWR-East value and the Ext- Wall Insulation R value however not the Roof and WWR-North values. Do you have any tips on what could help with the calibration? I have attached a picture with the final PAT calculated values and the bounds/std.deviation/deltaX entered in the calculation. Really appreciate any tips..
Vishakh
What time resolution are you calibrating against? What is the source of your calibration data? Why only R-value and WWR? WWR is pretty fixed by the building and isn't going to change from 0.3-0.8 or 0.1-0.7 - those are very different buildings. Energy use in most climates tends to not be very sensitive to R-value, so it is really easy to overfit that value.
I recommend running a sensitivity analysis on other major variables (LPD, EPD, schedule parameters / hours of operation) and make sure the most sensitive variables are calibrated first.
Hi, I am calibrating on a monthly basis. this is my trial run, I setup two Small Office models in OpenStudio using DOE Prototype Building Measure for climate zone 3A. One of the model was plain without any edits and the other model was edited using the above mentioned measures. Subsequently, my goal was to use the plain Small Office Model in PAT, insert exact measures as in Open Studio and have PAT recalculate the values. The source of the .JSON data was the utility consumption values of the 'edited' model.