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The Scientific World Journal
Volume 2014 (2014), Article ID 128754, 9 pages
Research Article

A Temperature-Based Model for Estimating Monthly Average Daily Global Solar Radiation in China

1CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
2University of Chinese Academy of Sciences, Beijing 100049, China
3College of Mechanical and Energy Engineering, Jimei University, Xiamen 361021, China
4State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Received 18 August 2013; Accepted 5 December 2013; Published 29 January 2014

Academic Editors: M. Cepin, H. Hasenauer, A. J. N. Khalifa, and A. Piacentino

Copyright © 2014 Huashan Li et al. 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.


Since air temperature records are readily available around the world, the models based on air temperature for estimating solar radiation have been widely accepted. In this paper, a new model based on Hargreaves and Samani (HS) method for estimating monthly average daily global solar radiation is proposed. With statistical error tests, the performance of the new model is validated by comparing with the HS model and its two modifications (Samani model and Chen model) against the measured data at 65 meteorological stations in China. Results show that the new model is more accurate and robust than the HS, Samani, and Chen models in all climatic regions, especially in the humid regions. Hence, the new model can be recommended for estimating solar radiation in areas where only air temperature data are available in China.