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Re: [EnergyPlus_Support] ASHRAE 90.1 Climate Zone Code
Don't use the stat file's classification for anything other than an idea of the weather. The stat file contains statistics based on the weather file, not the actual raw weather data from the last 60 years. The same applies to the ddy designday. These should be from ASHRAE. If they have been produced from the weather file (itself a statistical file), then they should be used with caution and not for code compliance (which is the case if they are created with the weather converter utility).
Mit freundlichen Grü�en- Sent from my iPhone (excuse the brevity)
i. A.
Jean Marais
b.i.g. bechtold
Tel. +49 30 6706662-23
On 16.04.2014, at 14:45, <<mailto:seanking.1970@xxxxxxxxxxx>seanking.1970@xxxxxxxxxxx> wrote:
>
Dear all,
>
> I don't know if some of you are aware that there is sometimes (quite often though) the climate code read from E+ weather stat file does not meet the code from ASHRAE 90.1 standard climate zone tables.
> Sorry if you do not know what I am talking about, here comes the details:
>
> I am doing a LEED/ASHRAE 90.1 modelling in EnergyPlus, but bump into a problem which really puzzled me.
The proposed location of my building is in Rome, Italy, and the weather file I need to use is ITA_Rome.162420_IWEC.epw (downloaded from EnergyPlus website). However, when I check stat file, the climate zone code ("Climate type" shown in the file, see below) is "3C", whilst ASHRAE Standard 90.1 climate zone table indicates a code of "4".
Climate type "3C" (ASHRAE Standards 90.1-2004 and 90.2-2004 Climate Zone)
> I have therefore carried out some more checks on other weather files (based on different locations), although most cases are correct or close to 90.1 Standard, there does exist some differences. For example, Istanbul in Turkey shows "3C" in stat weather file instead of "4" in Standard 90.1, Las Vegas (Nevada, USA) shows "2B" rather than "5B" (very big difference!) and Seattle (Washington, USA) gets "4A" instead of "5B".
Could anybody please advise what possible reasons in generating these differences, and how to choose a right weather file to do a LEED/ASHRAE modeling if the codes are not consistent between the two? Thank you very much in advance.
> Best regards,
> Sean King
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