Weather Data

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Paul Gilman
Weather Data

Are you looking for weather data for a location not covered by the NSRDB?

For information about where to find weather data to use with SAM, please see the Weather Page on SAM website:

https://sam.nrel.gov/weather

You might also be interested in a tool developed by Angus King, and described in this post:

https://sam.nrel.gov/node/71040

Best regards,
Paul.

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sborgeson
Getting dates from simulation outputs

In using the SDK, I've noticed that pvwattsv5 doesn't output any dates to correspond with its time series values. The dates would presumably come from the weather data, which can be configured and input in many different ways. Is there some part of the ssc_data that will give me access to the dates from the weather data that was used (I'm aware that the TMY data has no specific year, etc.) to run the module?

Is there another module that can parse the weather and return dates as a part of its outputs?

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maiconbastos
Longitude e latitude não especificado

I created a typical meteorological year to simulate a system of energy generation by solar concentration, but when I put to run the file is giving an error of Longitude and Latitude unspecified, I tried everything and I can not solve this error, I tried to even create The file in the 2013 version.
I am using Excel to build the file.
I would have some other software for editing the files.
Thank you in advance.

5 posts / 0 new
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tcoyne2
Potential Problem with Resource Azimuth

While running a CSP model (steam or molten salt, doesn't seem to matter which), I noticed that some sites have what seems to me to be an odd artifact with respect to the solar azimuth. I am using the built in locations on the SAM program. For example, if you use India (Trivandrum) and plot the time series, the resource solar azimuth really spikes in March - it almost looks like the data is inverted. I am not seeing this with every location, but I randomly clicked around and noticed the same artifact with Sri Lanka (Kankesanturai) and UAE (Abu Dhabi) - there probably are a few more.

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ssgouridis
Problems with using custom weather data

Hello,

I would like to use SAM with custom weather data.

To do so, I have first copied a sample CSV file from the library.

When I use the copied file unedited, the simulation proceeds normally.

When I open the file with Excel and save it as a CSV even though I have not done any other change (i.e. the data are exactly the same) the simulation fails. I also tried another software - Open Tables but with the same results.

5 posts / 0 new
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ivonnepena
Read srw correctly

Hi Paul,

I am trying to read a srw wind weather file in SAM store in my laptop. I am using OX. These are the steps I followed:

1 post / 0 new
Paul Gilman
Leap Years

I have some single year input data files (in EPW format) for 2016 to run in SAM. I can see in the SAM help notes it says: “When you run a simulation, the performance model uses hourly data from the weather file to calculate the quantity of electricity generated by the system in one year by summing the 8,760 hourly generation values.” But 2016 is a leap year and has 8784 hours. Is there any way to get SAM to read in all 366 days of data?

3 posts / 0 new
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Ehab Issa
Ehab Issa's picture
Error Message in PV (Detailed)- weather data

Hello,
I downloaded weather data for Egypt from Energy Plus weather format (Africa WMO Region 1--EGY_Alexandria.623180_ETMY.epw), lately when I load weather data and run simulation this message appear and simulation faild.

**exec fail(pvsamv1): failed to process irradiation on surface 1 (code: -1) [y:1985 m:4 d:24 h:11] Simulation pvsamv1 failed.**

How I solve this problem

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Paul Gilman
30-minute Simulations

Is it possible to set the ‘data’ results to be listed in 30 minute intervals instead of 60 minute?

Yes, SAM's solar models can run simulations in up to 1-minute intervals. The simulation time step is determined by the weather data, so to run 30-minute simulations you will need 30-minute weather data.

NREL's NSRDB provides 30-minute data, so if you do not have your own data, you can download it from:

https://nsrdb.nrel.gov/nsrdb-viewer

Best regards,
Paul.

1 post / 0 new
Paul Gilman
Daily Weather Data in SAM?

I have an Excel sheet weather data for Maan Jordan, where the parameters (GHI, DNI, Ta...) are daily, not hourly. I would like to convert this weather data file from excel format into TMY3 format, so I can use it in the simulation on SAM. The version of SAM is 2016.3.14. Could you please tell me how to do this conversion?

SAM requires a weather file with at least hourly data, so it will not work with daily data.

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