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

[RobertWichert]

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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