[Bldg-sim] Creating a weather file

[Joe Huang]

Since this thread is still bouncing around BLDG-SIM, I thought I'd update others on what I 
have done using the ISH data base and sent to Khristiam.

As Krista mentions, the ISH contains two locations : Ciudad Bolivar (WMO 804440) and 
General Manuel Carl (WMO 804463).   Unfortunately, the second station contains only wind 
data and no temperatures, except for half a year in 2011.
The first station, however, contains fairly complete data (~4000 records /year for 2010), 
so I processed that to create a usable weather file in the DOE-2 *.BINM format needed for 
eQUEST (my procedure also produces other formats such as TMY3, TMY2, and EPW).  However, 
when Khristiam used the file, it produced significantly lower cooling loads than using 
Caracas, which of course doesn't make too much sense.  So, I investigated and found that 
the weather file I produced contained very low dew point temperatures around 0 C during 
many of the nighttime hours. I traced this to the raw ISH data where the station 
(airport)  had entered +0000 dew point temperatures over 400 times instead of +9999 for 
missing data.  So, I edited the raw data file and created a corrected weather file, and 
made a mental note to modify my procedure to check for such occurences.

Joe

Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
www.whiteboxtechnologies.com
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"


On 9/13/2012 1:28 PM, Raines, Krista wrote:
> Dear Khristiam,
>
> We use Meteonorm software when we need a weather file for a city that is not in the Energy Plus database. It uses a large weather station database and where there aren't weather stations, the software interpolates data between different stations. The software isn't free though, it's about 500 euros.
> http://meteonorm.com/
>
> Another source I've used that is free or cheap depending on the type of weather data you require is the NOAA site. It looks like their 2 nearest weather stations are called Ciudad Bolivar (Lat: 8.15 deg., Long: -63.550 deg.) and General Manuel Carl (lat: 8.283 deg, long: -62.75 deg.) Here is their site: http://www.ncdc.noaa.gov/cdo-web/#t=firstTabLink. You can search for the stations on the map and get hourly data text files. Usually I take these and convert them to .wea or .epa files through Weather Tool (this is an Autodesk product). You might also be able to use the Energy Plus Weather File Convertor which is free, but I haven't used it to convert text files to weather files before.
>
> Krista Raines, LEED AP BD+C
>
> Kohn Pedersen Fox Associates PC
> 11 West 42nd Street
> New York, NY 10036
> 212 237 3597 (Direct)
> 212 977 6500 (Main)
> 212 956 2526 (Fax)
> www.kpf.com
>
>
>
> -----Original Message-----
> From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Khristiam Alvarez
> Sent: Wednesday, September 12, 2012 8:41 AM
> To: bldg-sim at lists.onebuilding.org
> Subject: [Bldg-sim] Creating a weather file
>
> Hi there
>
> Have anyone experience in creating a new weather file from wunderground data?
>
> This is my case: I use the Caracas file download from the EnergyPlus site converted to eQuest format but I live in other hotter city, Puerto Ordaz that has a wunderground station working since last april.
>
> Thank you very much!
>
> --
> Khristiam Alvarez
> Ingeniero Mecánico
>
> Proyecto Hidroeléctrico Tocoma, Módulo 4 Proyectos Mecánicos Estudios e Ingeniería de Expansión CORPOELEC Km. 85 Vía Guri, Mun. Angostura, Edo. Bolivar, VENEZUELA
>
> Tlfs: 0286.965.3579 / 0424.9701025 / 0416.5861057 Para llamar desde fuera de Venezuela:
> +58.286.9653579 / +58.424.9701025 / +58.416.5861057
>
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> -----Original Message-----
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