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Re: [EnergyPlus_Support] RE: Wind speed and direction data?





What is your criteria for "accurate" ?   Since "typical year" weather files are created from historical weather data, it would be hard to claim that they are more accurate than their source data.  The only thing you can say is that they aim to be more "typical" or representative of long-term distributions. Even then, one should bear in mind how any particular "typical year" weather file has been created.  If the climate variable of interest is not included in the selection process,  e.g., wind direction, or if the weight given to it is low, then the selection could well be random for that variable. 

Historical data on weather stations around the world are available from a number of sources.

Joe

Joe Huang    
White Box Technologies, Inc.
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http://weather.whiteboxtechnologies.com for simulation-ready weather data
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On 12/28/2013 11:10 AM, Oscar Hernandez wrote:
 

The weather files are builded with the average months over the 30 or 15 last years. Yes it's more accurate. If you want a particular weather file go to weather analytics.

Good luck

On Dec 28, 2013 5:23 AM, <issworld2000@xxxxxxxxx> wrote:
 

Thank you for the reply once again. I managed to find the required wind speed and direction data (per hour) in .epw file. You were right, sorry.

What makes me puzzled is that for each month a data from a different year is picked up. Does this randomization of years makes data more accurate?




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