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Journal of Renewable Energy
Volume 2013, Article ID 168048, 11 pages
Review Article

A Review of Solar Radiation Models—Part I

Department of Applied Sciences & Humanities, Institute of Engineering & Technology, Gautam Buddh Technical University, Lucknow 226021, India

Received 31 August 2012; Accepted 29 November 2012

Academic Editor: Jayanta Deb Mondol

Copyright © 2013 A. K. Katiyar and C. K. Pandey. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Energy is considered as a key source for the future and plays a pivotal role in its socioeconomic development by raising the standard of living and the quality of life, not only for India but also for the world. In view of the scarce fossil fuel reserves, solar energy is one of the important sources of renewable energy used in India because of the suitable climate conditions. It receives about 5485.17 Wh/m2 day of solar insolation with an annual total of about 19, 74, 661.2 Wh/m2. Except for the monsoon months, solar radiation incidence is very encouraging, from the application point of view. For the efficient functioning and better performance of solar energy device, the information of solar radiation and its components at particular location is very essential for designing the solar energy devices. Therefore, over the years, several empirical correlations have been developed in order to estimate the more appropriate solar radiation in India as well as around the world. Here we present a review of different solar radiation models which predict global solar radiation and discussed the long-term plan to meet future energy demand with renewable energy due to economy growth.