Weather Data

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Paul Gilman
Weather Data

Are you looking for weather data to use with SAM? SAM can automatically download weather files from the NREL National Solar Radiation Data base (NSRDB), which covers locations in the Western Hemisphere from roughly 20° South to 60° North, including the continental United States, Hawaii and southern portions of Canada and Alaska, Caribbean, Central America, and northern South America (including most of Brazil). The NSRDB data also covers South Asia and parts of Central Asia, China, and Southeast Asia.

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seyong.kim
Creating typical year file from long-term data for wind power performance analysis

Hello,
I am trying to create my own weather file in South Korea for input to SAM wind power performance modelling.
This link (https://sam.nrel.gov/weather) gives me an idea about typical year file but not enough detail to implement it for the wind case.
If I have long-term wind regime at project site in South Korea, say 20 years worth data, derived from MCP (measure-correlate-predict) method, which methods are available for me to determine typical values and derive a set of one year data?

Thanks,
Seyong

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Erik_H
SAM Crashes Using Downloaded .srw Files

Hello,

I am in a renewable energy systems course at the University of Wisconsin and many, possibly all, of my classmates and I are having this same issue. Our assignment asked us to download 2012 NREL WIND toolkit data for a specific zip code (53597) and the data successfully saves to the computer. The file directory looks good and everything. However, once you hit "Simulate," SAM immediately crashes. This is an issue affecting both Macs and PCs.

I have attached my .sam file in case it helps troubleshoot this issue. Thanks for your help!

Best,

Erik

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syj9065
Getting a lot of HTTP 500 Errors when making API requests for CSV download

I am trying to gather weather data in zip code level. When I run my code, a lot of the requests result in HTTP 500 errors, but when I retry the request with the same parameters, it will usually succeeds the second time. What are the reasons that cause this? Thanks.

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Princess_Zaynab
Princess_Zaynab's picture
Small mistake "Radiance" in place of "Irradiance"

Hello,

Please I want to know if you don't think that "Diffuse Horizontal Radiation" should be corrected by "Diffuse Horizontal Irradiance" as we are working in W/m2 and that weather data are giving irradiance not radiance. (same thing for "Direct normal radiation" ).

This is situated in Help: "Weather data"=> "Weather data elements".

Thanks in advance for your answer,

Z

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jsward
Negative DNI estimates from DISC model

I am attempting to wrap pvwattsv5 into my own program for estimating solar output over specific historical periods. I have most necessary weather data (GHI, Tdry, Wspd) for input to the module. However, when trying to estimate DNI from GHI using the DISC model, many negative values are being output. The only changes that I have made to the DISC model have been extending equations out to 8760 hours, adding a zero hour to Jan 1, and changing default inputs to inputs from one of my own stations (lat:42.75, long:-73.81, pressure:996).

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jsward
Negative DNI estimates from DISC model

Hello,

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Germano Lira
Wheather Data - Brazil SWERA

Good morning,

Here I found that SAM can use SWERA Weather data to Brazil from: https://maps.nrel.gov/swera
But I didn´t get to use the data from INPE HIGH RESOLUTION that I downloaded from there at SAM

I found that SAM uses data from SWERA, but how can I do to work with it?

The files in SAM's solar resource library are from the following sources:

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mabaseer
Weather Data

Dear Sir,

We have the weather data for a location in saudi arabia which contains only monthly data(average values) and not hourly data for three years. So is it possible to create our own SAM csv file with the help of the sample format available in the website as we don't have the hourly data. Please advice us on the same.

Thank You
Mohammad Abdul Baseer

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vshyam1992
vshyam1992's picture
How to POA irradiance for tilted surface

Hi

I am working on a masters thesis, In here I used TMY2 and TMY3 format to get the hourly GHI irradiance(W/m2).I am trying to find the hourly POA irradiance(W/m2) from whether a file, its showing "NAh". Can you please help what am I doing wrong in here. Is there any way to find the hourly POA irradiance?
Please suggest me

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