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RESEARCH PAPERS

New Correlation to Estimate Global Solar Radiation on Horizontal Surfaces Using Sunshine Hour and Temperature Data for Indian Sites

[+] Author and Article Information
S. S. Chandel

 State Council for Science, Technology and Environment, HP, B-34, SDA Complex, Kasumpti, Shimla, Himachal Pradesh, India-171009chandeḻshyam@yahoo.com

R. K. Aggarwal1

 State Council for Science, Technology and Environment, HP, B-34, SDA Complex, Kasumpti, Shimla, Himachal Pradesh, India-171009

A. N. Pandey2

 State Council for Science, Technology and Environment, HP, B-34, SDA Complex, Kasumpti, Shimla, Himachal Pradesh, India-171009

1

Department of Basic Sciences, Dr. Y.S. Parmar University of Horticulture & Forestry, Nauni, Solan, India.

2

Department of Physics, Meerut College, Meerut, India.

J. Sol. Energy Eng 127(3), 417-420 (Sep 22, 2004) (4 pages) doi:10.1115/1.1877512 History: Received January 24, 2004; Revised September 22, 2004

Solar radiation data, a prerequisite for the designing and sizing of solar energy systems, are not available in many Indian locations. However, the sunshine hour or temperature data are available for most sites from which solar radiation can be computed. New correlation models have been developed; incorporating the latitude and altitude of a site to estimate the monthly average global solar radiation on horizontal surfaces using the sunshine hour and temperature data. The models are used for computing values of six Indian stations with different geographical locations, based on 1015years of data. The estimated values are found to be in close agreement with their measured values. The estimated data are also compared with the results using other models to test the accuracy of new models. It has been shown that the estimated values of global radiation using temperature data are also sufficiently accurate and can be utilized for sites for which even sunshine hour data are not measured. This will lead to better inputs for designing and evaluating the performance of solar energy systems including passive solar buildings.

Copyright © 2005 by American Society of Mechanical Engineers
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