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Split the Global Solar into normal and diffuse using the E+ weather converter program

asked 2023-03-04 15:01:33 -0500

Michel's avatar

updated 2023-03-05 08:19:13 -0500

Hello,

I am having difficulties in using the energy plus weather converter.

I have made an EPW file using elements and I only have the Global solar radiation as input for the radiation part.

I input the EPW into the converter after assigning the other components as missing using the 9999 value however nothing happens.

Can someone tell me how to use proceed?

Best

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answered 2023-03-06 05:57:17 -0500

lklawrie's avatar

updated 2023-03-07 01:13:17 -0500

If you leave it as an EPW file, the weather converter assumes that everything is okay. It will convert some things, such as dew point or relative humidity if those values are "missing" but not, I think, the solar values.

You will need to input it as a "custom" with a "definitions" file to get it to effect a split in solar. Here is a link to the StdEPWDefFormat.def and here is the content:

&wthdata
NumInHour=1
InputFileType='CUSTOM'
InFormat='DELIMITED'
DataElements=year,month,day,hour,minute,datasource,Dry_Bulb_Temperature,Dew_Point_Temperature,Relative_Humidity,Atmospheric_Pressure,Extraterrestrial_Horizontal_Radiation,Extraterrestrial_Direct_Normal_Radiation,Horizontal_Infrared_Radiation_Intensity_from_Sky,Global_Horizontal_Radiation,Direct_Normal_Radiation,Diffuse_Horizontal_Radiation,Global_Horizontal_Illuminance,Direct_Normal_Illuminance,Diffuse_Horizontal_Illuminance,Zenith_Luminance,Wind_Direction,Wind_Speed,Total_Sky_Cover,Opaque_Sky_Cover,Visibility,Ceiling_Height,Present_Weather_Observation,Present_Weather_Codes,Precipitable_Water,Aerosol_Optical_Depth,Snow_Depth,Days_Since_Last_Snow,Albedo,Liquid_Precipitation_Depth,Liquid_Precipitation_Quantity
DataMissingValues=99999,99,99,99,99,,999,999,999,999999,9999,9999,9999,9999,9999,9999,999900,999900,999900,9999,999,999,99,99,9999,99999,9,999999999,999,0.999,999,99,999,999,99
DataUnits='x','x','x','x','x','x','C','C','%','Pa','Wh/m2','Wh/m2','Wh/m2','Wh/m2','Wh/m2','Wh/m2','lux','lux','lux','Cd/m2','deg','m/s','tenths','tenths','km','m','x','x','mm','{.001}','cm','x','{.01}','mm','hr'
DataConversionFactors=1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
DelimiterChar=','
/

&miscdata
Comments1='Standard EPW Custom def format'
SourceData='EPW'
/

&datacontrol
NumRecordsToSkip=8
MaxNumRecordsToRead=8784
MissingWindDirAction=RANDOM
/

! Other options on datacontrol:
! MissingDataAction
! MissingWindDirAction
! MissingWindDirValue
! MissingOpaqueSkyCoverAction
! MissingOpaqueSkyCoverValue
! MaxWindSpeed
! MaxDirectSolar
! MaxDiffuseSolar
! MaxIlluminanceValue
! GenerateSolarRadiationWarnings
! GenerateIlluminanceWarnings
! MinDBTempByMonth
! MaxDBTempByMonth
! MinDPTempByMonth
! MaxDPTempByMonth

Linda

FIBPSA, FASHRAE https://climate.onebuilding.org - free repository of climate data for building simulation Climate.onebuilding is a FREE service not supported by any outside organization or government agency.

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Comments

Thank you for the comment, it worked.

Michel's avatar Michel  ( 2023-03-13 10:49:16 -0500 )edit

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Asked: 2023-03-04 15:01:33 -0500

Seen: 98 times

Last updated: Mar 13 '23