[Bldg-sim] *****SPAM***** Re: Revised TMY3 Weather Files now available on the Web

[Joe Huang]

Robert,

Are you sure that you got the TMY3 file from the White Box Technologies web site in CSV 
format?  I think those files have only the EPW and BINM formats, the CSV formats were 
given back to NREL and are available on their Web site 
http://rredc.nrel.gov/solar/old_data/nsrdb/1991-2005/tmy3/ . Maybe that's why 
ClimateConsultant did the conversion so beautifully ? :-) :-)

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 2/12/2015 11:33 AM, RobertWichert wrote:
> Thanks Scott,
>
> This application is running well on my computer right now.  The link in the application 
> did not work, but the White Box Technologies web site gave me the EPW format in CSV and 
> ClimateConsultant did the conversion beautifully.
>
> I owe you a <virtual beer>.
>
>
> -- 
> Robert P. Wichert P.Eng.  LEED AP
> CEPE  CEA  HERS I/II BPI BA
> +1 916 966 9060
> FAX +1 916 966 9068
>
>
>
> On 2/9/2015 3:48 PM, West, Scott P wrote:
>>
>> Robert,
>>
>> Once you get two psychrometric data points of moist air, you should be able to derive 
>> the other properties that you desire.  A lot of the hourly weather files just happen to 
>> provide humidity in DP. Obviously if you have more than a few data points to evaluate 
>> (like a full TMY3 file), looking them up on a psych chart isn’t very practical.  Unless 
>> you’re particularly interested in evaluating partial pressure equations, I would 
>> recommend using readily available software as a data filtering tool.  I recommend 
>> ClimateConsultant which is a free software produced by UCLA:
>>
>> http://www.energy-design-tools.aud.ucla.edu/climate-consultant/request-climate-consultant.php
>>
>> The software can be used for visualizing weather data and evaluating heating and 
>> cooling strategies.  It’s great for that, but I often simply use it to filter raw 
>> weather files and then export to Excel.  The whole process takes 5 minutes once you 
>> have the software installed.  You simply find the appropriate EPW weather file 
>> (EnergyPlus format) from the web (link provided in the software) and import it into 
>> ClimateConsultant.  You can then export to csv.  I like how the software will 
>> automatically convert from SI to IP units.  You can choose other ways of representing 
>> humidity like RH and WB.  You can also use it to quickly construct daily or monthly 
>> averages if desired.
>>
>> Anyway, that’s my plug for ClimateConsultant for those of us that can’t program good 
>> data filters (or are too lazy).  I hope it’s helpful.
>>
>> Scott P. West, P.E., LEED AP BD+C, BEAP, BEMP | *JACOBS*| Mechanical Engineer | Energy 
>> & Power Solutions| 817.222.8512 office |817.897.1882 cell |scott.west at jacobs.com 
>> <mailto:scott.west at jacobs.com>| www.jacobs.com <http://www.jacobs.com/>| 
>> www.jacobs.com/energyportfolio <http://www.jacobs.com/energyportfolio>
>>
>> *From:*RobertWichert [mailto:robert at wichert.org]
>> *Sent:* Monday, February 09, 2015 2:34 PM
>> *To:* bldg-sim at lists.onebuilding.org
>> *Subject:* Re: [Bldg-sim] Revised TMY3 Weather Files now available on the Web
>>
>> 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
>>     <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 <mailto: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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>
> -- 
> Robert P. Wichert P.Eng.  LEED AP
> CEPE  CEA  HERS I/II BPI BA
> +1 916 966 9060
> FAX +1 916 966 9068
>
>
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