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HDD calculation #106
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@FedericoTartarini |
I apologize for not making this 100% clear, but unfortunately, this is not the issue I was mentioning. The issue is that if you open the .zip climateorg file you downloaded with from here, inside there is a file with ends with stat (ITA_ER_Bologna-Marconi.AP.161400_TMYx.stat). Open this file with either NotePad or Excel you will find a table in it showing the heating degree day. This is the value that does not match the results of the Clima tool. Please let me know if this is clear now. |
Hi Federico, thanks for the explanation, I misunderstood it a bit before. I would like to double check, I noticed that the STAT file has two HDDs "Monthly Standard Heating/Cooling Degree Days/Hours" and "Monthly Weather File Heating/Cooling Degree Days/Hours", which one should I use. Thanks! |
Very good point. Thank you for noticing this. I do not know what is the difference between the two. It would be amazing if you could look into it and let me know if you find the reason they provide to sets of values. |
Great, so I then believe we should compare our results with the |
Hey @FedericoTartarini, Eric and I have been wrapping our heads around quite a bit, but so far are unable to identify where the calculation error may be with the clima code: I've researched but I am unable to ascertain the formula climate.onebuilding is using to calculate the HDD and CDD values. |
Thank you for looking into this. @giobetti shall we contact Dru and ask him if he knows how these values are calculated in the OneBuilding files? |
Hi Federico, just checking if you've received any response here? |
No unfortunately. |
For Bologna, I do not think our results match the climate.onebuilding results.
HDD for 10°C baseline with our tool = 730
HDD for 10°C baseline Onebuilding = 673
from this file
bologna.txt
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