[Bldg-sim] Revised TMY3 Weather Files now available on the Web

Joe Huang yjhuang at whiteboxtechnologies.com
Mon Feb 9 15:51:50 PST 2015


Forgot to attach the snippet, but it seems like others have mentioned various tools that 
can calculate the Wetbulb.


(have to look at this with a nonpropotional font  for the columns to line up)
TRY  CHICAGO            0 41.80   87.75    6    3  < - loc,year,lat,long,time-zone, solar flag
   0.98  0.98  0.98  0.98  0.98  0.98  0.98  0.98  0.98 0.98  0.98  0.98  < - monthly 
clearness numbers
  500.0 497.0 499.0 504.0 511.0 518.0 524.0 526.0 524.0 519.0 512.0 505.0  < - monthly 
ground temps in R
  1 1 1  20.  20.  29.3  10.  1  0  14 0.0019 0.081   7.0 0.0    0.0  2  17.
  1 1 2  18.  18.  29.4  10.  1  0  14 0.0017 0.081   6.0 0.0    0.0  2  18.
  1 1 3  17.  17.  29.4  10.  0  0  14 0.0016 0.082   6.0 0.0    0.0  2  16.
  1 1 4  15.  16.  29.4  10.  0  0  14 0.0015 0.082   5.5 0.0    0.0  2  16.
  1 1 5  15.  15.  29.4  10.  0  0  14 0.0015 0.082   5.0 0.0    0.0  2  15.
  1 1 6  14.  14.  29.5   7.  1  0  14 0.0014 0.082   5.0 0.0    0.0  2  16.
  1 1 7  13.  13.  29.5   9.  0  0  14 0.0012 0.083   4.5 0.0    0.0  2  16.
  1 1 8  10.  11.  29.5   2.  0  0  14 0.0010 0.083   3.5 0.0    0.0  2  12.
  1 1 9   9.  10.  29.5   0.  0  0  14 0.0009 0.083   3.5 0.0    0.0  2  11.
  1 110   9.  10.  29.5   3.  0  0  13 0.0009 0.083   3.5 0.0    0.0  2  14.
  1 111  10.  10.  29.6   7.  0  0  13 0.0010 0.083   3.5 0.0    0.0  2  12.
  1 112  11.  12.  29.6   8.  0  0  14 0.0011 0.083   4.0 0.0    0.0  2  12.
  1 113  12.  13.  29.5   7.  0  0  13 0.0011 0.083   4.5 0.0    0.0  2  13.
  1 114  12.  13.  29.5   8.  0  0  13 0.0009 0.083   4.0 0.0    0.0  2  14.
  1 115  12.  13.  29.5   7.  0  0  12 0.0010 0.083   4.0 0.0    0.0  2  16.
  1 116  10.  12.  29.6   5.  0  0  12 0.0008 0.083   3.5 0.0    0.0  2  10.
  1 117   9.  10.  29.6   5.  0  0  12 0.0008 0.083   3.0 0.0    0.0  2  11.
  1 118   8.   9.  29.6  10.  0  0  12 0.0008 0.084   3.0 0.0    0.0  2  12.
  1 119   9.  10.  29.6  10.  0  0  12 0.0009 0.083   3.5 0.0    0.0  2  11.
  1 120   8.   9.  29.6  10.  0  0  11 0.0008 0.084   3.0 0.0    0.0  2  11.
  1 121   8.   9.  29.6  10.  0  0  11 0.0008 0.084   3.0 0.0    0.0  2  13.
  1 122   9.  10.  29.6  10.  0  0  11 0.0009 0.083   3.5 0.0    0.0  2  12.
  1 123  10.  11.  29.6  10.  0  0  10 0.0009 0.083   3.5 0.0    0.0  2  10.
  1 124  10.  11.  29.6   9.  0  0  12 0.0010 0.083   3.5 0.0    0.0  2  12.
  ^ ^ ^  ^    ^    ^      ^   ^  ^   ^   ^      ^     ^ ^      ^    ^   ^
  | | |  |    |    |      |   |  |   |   |      |     | |      |    |   |
Mon| |  |    |    |      |   |  |   |   |      |     | |      |    |   |
    | |  |    |    |      |   |  |   |   |      |     | |      |    |   |
  Day |  |    |    |      |   |  |   |   |      |     | |      |    |   |
      |  |    |    |      |   |  |   |   |      |     | |      |    |   |
    Hour |    |    |      |   |  |   |   |      |     | |      |    |   |
         |    |    |      |   |  |   |   |      |     | |      |    |   |
       Wet   Dry  Atmos Cloud |  | Wind Hum.  Atmos Enth- Total Direct  |  Wind
       Bulb  Bulb Press Amount|  | Dir  Rat.  Dens. alpy Solar Normal  | Speed
       (F)   (F) (inHg) (0-10)|  |(0-15)    (lb/cf)(btu/lb) Rad.  Solar  | (knots)
                              |  | (Btu/hr-sf)  |
                            Rain Snow                                  Cloud
(0,1)(0,1)                                  Type
(0-2)

Note: Snow, rain, and wind direction are not needed; either total and direct
solar OR cloud type are required.


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 2/9/2015 1:02 PM, Joe Huang wrote:
> Wet-bulb is not generally measured in weather stations, but can be derived from other 
> measured climatic variables, such as dry-bulb temperature, dew-point temperature, and 
> atmospheric pressure.  Unfortunately, the derivation requires several equations and 
> trial-and-error iteration (see Chapter 1 of the ASHRAE Handbook of Fundamentals).  If 
> you don't relish writing a script or program to do this, you can look at the unpacked 
> DOE-2 format (*.FMT or *.FMTM)  of the weather file, which does contain the calculated 
> wet-bulb temperatures in the first data column (see attached sample snippet).  However,  
> you will need a utility Fortran program wthfmt2.f or wthfmt3.f  to convert the packed 
> (*.BIN or *.BINM) DOE-2 file to a humanly -readable text  *.FMT or *.FMTM file.
>
> E-mail me for details.
>
> 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 2/9/2015 12:33 PM, RobertWichert wrote:
>> These weather files are great, thanks for the info, but I am trying to get wet bulb 
>> temperature too, and they do not seem to give wet bulb temperatures.
>>
>> Any ideas on that, perhaps?
>>
>>
>> -- 
>> Robert P. Wichert P.Eng.  LEED AP
>> CEPE  CEA  HERS I/II BPI BA
>> +1 916 966 9060
>> FAX +1 916 966 9068
>>
>>
>> ========================================
>> On 1/30/2015 9:10 PM, Joe Huang wrote:
>>> White Box Technologies (WBT), in collaboration with the National Renewable Energy 
>>> Laboratory (NREL), has revised the TMY3 weather files to correct inconsistencies in 
>>> units for illuminances, improve the reporting of Liquid Precipitation, replace all 
>>> missing records with interpolated or filled values (chiefly for visibility, ceiling 
>>> height, aerosol optical depth, and albedo), and add a new variable for Present Weather.
>>>
>>> Since their release in 2005, the TMY3 weather files covering 1,020 locations in the US 
>>> and dependencies has become the standard set of weather files for use in computer 
>>> simulations of solar energy conversion systems and buildings. The intent of this 
>>> revision is not to redo the fundamental analysis, but correct some known errors and 
>>> make modest improvements in the reporting of subsidiary climate variables.
>>>
>>> The only impact from these corrections and changes are for daylighting simulations 
>>> that use the illuminance values, and for building simulations that use the liquid 
>>> precipitation to model green roofs or moisture transport through the building 
>>> envelope. The added Present Weather variable is not directly used in any simulation 
>>> program, but allows the DOE-2 BINM files to have correct IRAIN and ISNOW flags, 
>>> although these two variables are not being used in DOE-2.  Filling in missing data for 
>>> Visibility, Ceiling Height, etc., should have no impact on the use of the TMY3s, but 
>>> improves their overall record-keeping.
>>>
>>> The revised TMY3 files in their native CSV format have been provided back to NREL and 
>>> are available here: http://rredc.nrel.gov/solar/old_data/nsrdb/1991-2005/tmy3
>>>
>>> The revised TMY3 files in EPW and BINM formats are available for free download on the 
>>> White Box Technologies web site at http://weather.whiteboxtechnologies.com/wd-TMY3 or 
>>> by selecting File Type as "TMY3" at http:/weather.whiteboxtechnologies.com/search to 
>>> search using GoogleEarth. The zip file names are unchanged, but the underlying EPW and 
>>> DDY files will have the *TYA designation to distinguish them from the previous TMY3 
>>> versions.
>>>
>>> For a more detailed description and full documentation of the revision,  please see 
>>> the attached memorandum.
>>>
>>> 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"
>>>
>>>
>>> _______________________________________________
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>>> http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
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>>
>>
>>
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TRY  CHICAGO            0   41.80   87.75    6    3  < - loc,year,lat,long,time-zone, solar flag
  0.98  0.98  0.98  0.98  0.98  0.98  0.98  0.98  0.98  0.98  0.98  0.98  < - monthly clearness numbers
 500.0 497.0 499.0 504.0 511.0 518.0 524.0 526.0 524.0 519.0 512.0 505.0  < - monthly ground temps in R
 1 1 1  20.  20.  29.3  10.  1  0  14 0.0019 0.081   7.0    0.0    0.0  2  17.
 1 1 2  18.  18.  29.4  10.  1  0  14 0.0017 0.081   6.0    0.0    0.0  2  18.
 1 1 3  17.  17.  29.4  10.  0  0  14 0.0016 0.082   6.0    0.0    0.0  2  16.
 1 1 4  15.  16.  29.4  10.  0  0  14 0.0015 0.082   5.5    0.0    0.0  2  16.
 1 1 5  15.  15.  29.4  10.  0  0  14 0.0015 0.082   5.0    0.0    0.0  2  15.
 1 1 6  14.  14.  29.5   7.  1  0  14 0.0014 0.082   5.0    0.0    0.0  2  16.
 1 1 7  13.  13.  29.5   9.  0  0  14 0.0012 0.083   4.5    0.0    0.0  2  16.
 1 1 8  10.  11.  29.5   2.  0  0  14 0.0010 0.083   3.5    0.0    0.0  2  12.
 1 1 9   9.  10.  29.5   0.  0  0  14 0.0009 0.083   3.5    0.0    0.0  2  11.
 1 110   9.  10.  29.5   3.  0  0  13 0.0009 0.083   3.5    0.0    0.0  2  14.
 1 111  10.  10.  29.6   7.  0  0  13 0.0010 0.083   3.5    0.0    0.0  2  12.
 1 112  11.  12.  29.6   8.  0  0  14 0.0011 0.083   4.0    0.0    0.0  2  12.
 1 113  12.  13.  29.5   7.  0  0  13 0.0011 0.083   4.5    0.0    0.0  2  13.
 1 114  12.  13.  29.5   8.  0  0  13 0.0009 0.083   4.0    0.0    0.0  2  14.
 1 115  12.  13.  29.5   7.  0  0  12 0.0010 0.083   4.0    0.0    0.0  2  16.
 1 116  10.  12.  29.6   5.  0  0  12 0.0008 0.083   3.5    0.0    0.0  2  10.
 1 117   9.  10.  29.6   5.  0  0  12 0.0008 0.083   3.0    0.0    0.0  2  11.
 1 118   8.   9.  29.6  10.  0  0  12 0.0008 0.084   3.0    0.0    0.0  2  12.
 1 119   9.  10.  29.6  10.  0  0  12 0.0009 0.083   3.5    0.0    0.0  2  11.
 1 120   8.   9.  29.6  10.  0  0  11 0.0008 0.084   3.0    0.0    0.0  2  11.
 1 121   8.   9.  29.6  10.  0  0  11 0.0008 0.084   3.0    0.0    0.0  2  13.
 1 122   9.  10.  29.6  10.  0  0  11 0.0009 0.083   3.5    0.0    0.0  2  12.
 1 123  10.  11.  29.6  10.  0  0  10 0.0009 0.083   3.5    0.0    0.0  2  10.
 1 124  10.  11.  29.6   9.  0  0  12 0.0010 0.083   3.5    0.0    0.0  2  12.

 ^ ^ ^  ^    ^    ^      ^   ^  ^   ^   ^      ^     ^      ^      ^    ^   ^
 | | |  |    |    |      |   |  |   |   |      |     |      |      |    |   |
Mon| |  |    |    |      |   |  |   |   |      |     |      |      |    |   |
   | |  |    |    |      |   |  |   |   |      |     |      |      |    |   |
 Day |  |    |    |      |   |  |   |   |      |     |      |      |    |   |
     |  |    |    |      |   |  |   |   |      |     |      |      |    |   |
   Hour |    |    |      |   |  |   |   |      |     |      |      |    |   |
        |    |    |      |   |  |   |   |      |     |      |      |    |   |
      Wet   Dry  Atmos Cloud |  | Wind Hum.  Atmos Enth-  Total Direct  |  Wind 
      Bulb  Bulb Press Amount|  | Dir  Rat.  Dens. alpy   Solar Normal  | Speed
      (F)   (F) (inHg) (0-10)|  |(0-15)    (lb/cf)(btu/lb) Rad.  Solar  | (knots)
                             |  |                          (Btu/hr-sf)  |
                           Rain Snow                                  Cloud
                           (0,1)(0,1)                                  Type
                                                                       (0-2)

Note: Snow, rain, and wind direction are not needed; either total and direct
solar OR cloud type are required.


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