What are the data sources for solar radiation assessment of a solar site?


Radiation data is available from various sources, such as IMD, NREL, Meteonorm, NASA, WRDC (World Radiation Data Centre) and so on. Some of these agencies provide data free of cost and with others, the data needs to be purchased.

Meteonorm

Meteonorm provides data of more than 8,055 weather stations. The measured parameters are monthly means of global radiation, temperature, humidity, precipitation, days with precipitation, wind speed and direction, sunshine duration. Time periods 1961-90 and 1996-2005 for temperature, humidity, precipitation and wind speed are available. Satellite data is used for areas with low density of weather stations. Interpolation models are provided in the software to calculate mean values for any site in the world. The user may import data for use in the models. This data is not freely available, and must be purchased along with the Meteonorm software. For further details refer http://meteonorm.com/

WRDC

WRDC (World Radiation Data Center) provides monthly irradiance for 1195 sites in the world, averaged during periods between 1964 and 1993. Many of them are only over a few years. These data doesn’t include temperatures, which should be obtained from another source. This data is available free of cost.  For further details log on to http://wrdc-mgo.nrel.gov/

RETScreen

RETScreen is Canadian software which holds a complete database for any location in the world, optimised for using the best available data at each location from about 20 sources, the main ones being the WRDC and the NASA irradiance data. Temperatures and wind velocities are also provided probably with good reliability. NASA and WRDC data are available free of cost, and hence RETScreen data is also free and can be downloaded from http://www.retscreen.net/ .

IMD (Indian Meterological Department)

IMD has 45 radiation observatories recording various radiation parameters. At all these stations, measurement of global solar radiation is being carried out while at a few selected stations other parameters like diffuse, direct, net, net-terrestrial and reflected radiation and atmospheric turbidity are also measured. Data loggers have been introduced at four stations viz. New Delhi, Patna, Jaipur and Thiruvanathapuram. this is a paid data service. For further details log on to http://www.imd.gov.in/

NASA

NASA provides over 200 satellite-derived meteorology and solar energy parameters. These are monthly averages from 22 years of data. Global solar energy data is available for 1195 ground sites. These data are available free of cost. For further details log on to http://nssdc.gsfc.nasa.gov/

Advertisements

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s