[Bldg-sim] *****SPAM***** Re: Revised TMY3 Weather Files now available on the Web
Joe Huang
yjhuang at whiteboxtechnologies.com
Thu Feb 12 13:05:33 PST 2015
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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