[EnergyPlus_Support] question about weather file

["Hu,Jia" <hujia06@xxxxxxxxx>]

Hello friends,

 

I met a problem about the weather file. First of all, see one example, the data are from weather file.

 

DATE	Global Horizontal Illuminance {lux}	Total Sky Cover {.1}Opaque Sky Cover {.1}	Opaque Sky Cover {.1}
5-Jan	64100	0	0
13-Jan	15300	1	1
16-Jan	46900	0	0
18-Jan	58500	1	0
28-Jan	18700	1	1

 

 

Look at the Jan 16 and Jan. 18 illum. data and sky cover. For zero cover, The horizontal illuminance is lower for sky cover of 0 than that for sky cover of 1.

 

My question is what factors influence the "Normal illuminance' and "Horizontal illuminance' in the weather file? It seems that the "sky cover" in the weather file is not the only factor according to the above example.

 

I have uploaded the excel file of weather file at Problem_submittals folder at URL: http://groups.yahoo.com/group/EnergyPlus_Support/files/_Problem_Submittals/USA_FL_Gainesville.Rgnl.AP.722146_TMY3E.xls   I have highlighted the data in the weather file, and you can find it easily.

 

Thank you in advance.

 

Jia

 

__._,_.___

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___