Most transient thermal simulations require weather data. We have collected weather data of various formats and are making it available to the
simulation community. TRNSYS is capable of accepting many forms of weather data including the following. Clicking on the links below will bring you to
both the data and descriptions of each type. In some cases, we do not have the legal right to distribute the data in question but have instead,
provided a link to a website where it can be downloaded.
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Monthly Average Data
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The TRNSYS Type 54 Weather Data Generator generates hourly weather data for a typical year given the monthly average values of solar radiation, dry
bulb temperature, humidity ratio, and windspeed (optional). WDATA.DAT is a file of monthly average weather data from 329 sites in the United States
and Canada. The data is taken from the publication Input Data for Solar Systems by Cinquemani, Owenby, and Baldwin, published by the U.S. National
Oceanic and Atmospheric Administration, Asheville, NC. Click at the left to access the data.
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Generated Hourly Data
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The Solar Energy Laboratory has used the TRNSYS Weather Generator Component to create hourly weather data sets for locations outside the US. Follow the link at the left to download individual data sets.
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Typical Meteorological Year Data
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With the release of version 16, TRNSYS is now able to read the full, original Typical Meteorological Year (TMY) data set. 239 US sites available.
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TRNSYS (TMY) Data
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The original Typical Meteorological Year (TMY) data set, paired down to provide hourly data in a manageable file size. Click at the left to access
234 US and Canadian sites available for free download.
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TMY2 Data
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TMY2 weather files for 239 U.S. locations can be downloaded free of charge from from the U.S. National Renewable Energy Laboratory (NREL). The TMY2
data are derived from the 1961-1990 National Solar Radiation Data Base (NSRDB). As TMY2 data are based on more recent and accurate data and will make
possible more accurate performance and economic analyses of energy systems, these data sets are recommended by NREL for use in place of earlier TMY
data sets derived from the 1952-1975 SOLMET/ERSATZ data base. TMY and TMY2 data sets cannot be used interchangeably because of differences in time
(solar versus local), formats, elements, and units. The TMY2 data sets and manual were produced by the National Renewable Energy Laboratory's (NREL's)
Analytic Studies Division under the Resource Assessment Program, which is funded and monitored by the U.S. Department of Energy's Office of Solar
Energy Conversion. Click at the left to downloaded data sets.
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EnergyPlus Data
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In March 2000 a feature was added to TRNSYS, making it able to read EnergyPlus format weather files. Click at the left and link to the EnergyPlus
website where the data is available for free download.
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International Weather for Energy Calculations (IWEC) Data
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In 2001, ASHRAE completed a project to provide hourly weather data for hundreds of sites outside the US and Canada. Click at the left and link to the
EnergyPlus website where the data is available for free download.
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