Re: [EnergyPlus_Support] epw Weather File

[Drury B Crawley <dbcrawley@xxxxxxxxx>]

For the files on the EnergyPlus web site, the year shown in column 1 is the year of the data.  It varies due to different period of records and the methodologies for selecting months.  All the weather data there are 12 months (often from different years).  These are the actual hourly data for the temperature, humidity, wind speed and direction.  (It is rare that solar data are available -- most of the data sets have calculated solar radiation data.)

 

Yes, 0 direction is north, 90 degrees is east.  See the definitions and further discussion in the Auxiliary Programs documentation.

 

 

On Fri, Mar 4, 2011 at 10:49 AM, Farshad Nasrollahi <dezzaki@xxxxxxxxx> wrote:

 

Dear friends,

 

I have 2 questions regarding the epw weather files.

 

-       The first column of .epw weather data, which represent the year, is in some weather files 2005 and in some other is different years e.g. for the January is 2001 and for February is 2002.

Whether the climatic information (Temperature, humidity, etc.) of each file are the information of mentioned year or they are the average of different years?

 

-       What is the definition of wind direction in the epw files? For example whether the 0 Degree represents the north and 90 degree represents the east side?

 

Best wishes,

Farshad

 

 

 

 

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