[Bldg-sim] Need a help with energy_plus Climate Data

[Joe Huang]

The difficulty of converting measured weather data to an epw depends a lot on how complete 
are your data.  For a usable simulation weather file, you need these six key parameters - 
temperature, humidity, wind speed and direction, global horizontal and direct normal solar 
radiation.  The solar radiation is generally the most problematic.  There are various 
models that calculate solar radiation from other climate parameters, esp. cloud cover, but 
there are not many publicly-available programs that have them.  Also, cloud cover requires 
human observation or a dedicated laser and is almost never recorded at typical weather 
monitoring stations.  Lastly,  you have to make sure that whatever program you use 
interpolates in case there are missing observations in your data stream.

Joe

Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
http://weather.whiteboxtechnologies.com for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"

On 3/26/2018 6:33 AM, Ibrahim NEYA via Bldg-sim wrote:
> Hello everybody,
>
> I have measured on-site climate data and stored them in an excel sheet.
> I want to use them in energy-plus for temperature prediction in the building.
> I don't know how to put them in an epw file in order to perform the simulation.
>
> I will be happy to know that you can help me.
> Thank you for your time
>
> Regards
>
> -- 
>
> NEYA Ibrahim
> Energy and Electrical Engineer
> Tél : 00226 61 85 77 07
>
>
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