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Re: [EnergyPlus_Support] weather file



Thank you for information you offered.
 
If I need the following six. Which should I measure? and which should I calculate using others? If necessary, you could introduce some references?
 
  1. Global Horizontal Radiation {Wh/m2}
  2. Direct Normal Radiation {Wh/m2}
  3. Diffuse Horizontal Radiation {Wh/m2}
  4. Global Horizontal Illuminance {lux}
  5. Direct Normal Illuminance {lux}
  6. Diffuse Horizontal Illuminance {lux}
 
Jia
 
 
On Thu, Jan 21, 2010 at 11:12 AM, Richard Raustad <RRaustad@xxxxxxxxxxxx> wrote:
 
 

You can measure these yourself. The IR sensor is more expensive the

others, for both the expensive sensors and the cheap sensors. You list 9
data points, I have not looked at what measurements you would require
out of the list you provided in order to develop a complete set of
weather data (i.e., you may only need 4 or 5 of these to calculate all
the others).
 
The expensive sensors cost $2500 ($4000 for the IR) at +-1%
The cheap sensors are more like $100 (+- 5%) (not sure you can get a
cheap IR sensor)
 
Some of the manufacturers:
 
Epply or Kipp & Zonen make the more expensive sensors
Apogee and LiCor make cheap sensors
There are also other manufactuers
 
Hu,Jia wrote:
>
> Hello all:
>
> I have a question about the following metrics in weather file.
> Can they be directly measured by some inexpensive devices?
>
> Thank you
>
> *Extraterrestrial Horizontal Radiation {Wh/m2}* *Extraterrestrial
> Direct Normal Radiation {Wh/m2}* *Horizontal Infrared Radiation
> Intensity from Sky {Wh/m2}* *Global Horizontal Radiation {Wh/m2}*
> *Direct Normal Radiation {Wh/m2}* *Diffuse Horizontal Radiation
> {Wh/m2}* *Global Horizontal Illuminance {lux}* *Direct Normal
 
> Illuminance {lux}* *Diffuse Horizontal Illuminance {lux}*
>
>
 
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
1679 Clearlake Road
Cocoa, FL 32922-5703
Phone: (321) 638-1454
Fax: (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu
 
UCF - From Promise to Prominence: Celebrating 40 Years
 
 

 


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