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[BLDG-SIM] EPW file average hourly statistics for wet bulb temperatures

You can use the eQUEST weather processor (eQ_WthProc)
  http://doe2.com/index_Wth.html
to read a EPW file and convert to DOE-2 compatible file (that
you can discard if not useful) but then you will have csv files
(orig and final - with doe-2 conversions) with the variables you
want (including headers) on the "final" csv if you uncheck the
"clear Interim Results on Exit" checkbox on the setup tab.

Here is an example original csv partial




    DryBulbT
    DewPtT
    Sol-GlobHor
    WindSpd
    WindDir
    Sol-DirNorm

     Month
    Day
    Hour
    F
    F
    w/m²
    mph
    degrees
    w/m²

     1
    1
    1
    18.86
    2.66
    0
    2.23
    110
    0

     1
    1
    2
    17.6
    5
    0
    0
    0
    0

     1
    1
    3
    17.06
    3.2
    0
    0.67
    0
    0

     1
    1
    4
    16.34
    1.4
    0
    1.56
    0
    0

     1
    1
    5
    15.8
    -0.4
    0
    2.23
    360
    0



Here is the example correcponding final

           DryBulbT WetBulbT DewPtT RelHum HumRatio Sol-GlobHor Sol-DirNorm WindSpd WindDir
     Month Day Hour F F F % lbmw/lbma w/m2 w/m2 mph degrees
     1 1 1 18.86 15.21 2.66 44.47 0.000907 0 0 2 110
     1 1 2 17.6 14.68 5 53.33 0.001024 0 0 0 0
     1 1 3 17.06 13.99 3.2 49.9 0.000933 0 0 1 0
     1 1 4 16.34 13.17 1.4 47.08 0.00085 0 0 2 0
     1 1 5 15.8 12.51 -0.4 44 0.000773 0 0 2 360


---
Jeff Hirsch
James J. Hirsch & Associates
Building Performance Analysis Software & Consulting
12185 Presilla Road
Camarillo, CA 93012-9243 USA
phone: (805) 553-9000
fax: (805) 532-2401
email: Jeff.Hirsch@xxxxxxxx
web: http://DOE2.com
----- Original Message ----- From: "Michael J. Witte" <mjwitte@xxxxxxxx> 
To: <BLDG-SIM@xxxxxxxx>
Cc: <BLDG-SIM@xxxxxxxx>
Sent: Friday, August 25, 2006 9:56 AM
Subject: [BLDG-SIM] [EnergyPlus_Support] Average hourly statistics for wet bulb temperatures


My mistake!  You are correct that the epw-->csv conversion will only give DB,
RH, and Dew Point.  The alternate route is to run an annual simulation with
EnergyPlus using the weather file of interest, select "Outdoor Wet Bulb" as an
hourly REPORT VARIABLE, and then use the csv output file to generate
statistics.  One could even generate the averages with EnergyPlus by applying
schedules to the report variable and reporting the scheduled value as monthly
averages.

Mike


On 25 Aug 2006 at 6:20, Gerald Pde wrote:


Energyplus weather files do not have wet-bulb
temperatures, do they? I had the impression they only
have DB , RH and Dew Point. You might have to manually
convert to wetbulb which might be quite an exercise.
Is there a simpler way of computing the data below?

Thanks
Gerald

--- "Michael J. Witte" <mjwitte@xxxxxxxx> wrote:

> If you are looking for long-term averages, you can
> download the EnergyPlus IWEC
> file for Brisbane (www.energyplus.gov --> Weather
> Data) and use the EnergyPlus
> weather converter to convert it from epw format to a
> csv file which includes
> column headings and can be opened in a spreadsheet
> program.  Then you can
> compute the averages from there.
>
> Mike
>
>
> On 24 Aug 2006 at 17:55, Ashfaque Ahmed Chowdhury
> wrote:
>
> > Hello All,
> >
> > I require average hourly statistics (Jan-Dec) for
> wet bulb temperatures (°C
> > or °F) of Brisbane, Australia. I tried to find
> using Bureau of Meteorology,
> > Australia website.But can't find any suitable
> data. Can anyone give me any
> > link to find it out?
> >
> > Thanks in advanced.
> >
> >
> >
> > --Ashfaque
> >
> > CQU, Australia
> >
> > --
> >
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========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support
> EnergyPlus-Support@xxxxxxxx
>
>
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