Sani, G. D/iya and Mohd Ekhwan, Toriman and Mohd Barzani, Gazim and Usman, M. Gana and Musa, G. Abdullahi
(2015)
*The correlation functions and estimation of global solar radiation studies using sunshine based model for Kano, Nigeria.*
Advances in Physics Theories and Application, 39 (1).
pp. 55-61.
ISSN 2224-719X

Text
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## Abstract

The use of empirical models for the comparative study of the correlation functions for the estimation of global solar radiation in Kano, Nigeria has been carried out. The models used are based on relative sunshine duration alongside the measured global solar radiation data, such as: the linear model = (a +b), the quadratic model = [ a + b +c() ]and the cubic model = [ a + b() + c() + d() ]. The models constants a ,b ,c and d will be used in calculating the estimated value of global solar radiation and also the agreement between the measured and estimated values. The statistical parameters used for the comparative techniques are: the mean bias error (mbe), mean percentage error (mpe) and the root mean square error (rmse), which will be use to determine the efficiency of the estimation. Subsequently, the result obtained for the models constants a and b are 0.045 and 0.051 respectively and the estimated values of global solar radiation are 21.4, 22.6, 22.2, 22.2 and 21.8 for the year 2006, 2007, 2008, 2009 and 2010 respectively. Similarly, the correlation functions obtained for all the three models are above 0.8, which shows that the estimation is good. Consequently, the developed model will be use confidently for Kano and nearby locations which has similar climatic conditions.

Item Type: | Article |
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Uncontrolled Keywords: | solar radiation, sunshine hour, extraterrestrial radiation, Angstrom constants a and b, Kano state Nigeria |

Subjects: | Q Science > QA Mathematics Q Science > QC Physics |

Depositing User: | Fatin Safura |

Date Deposited: | 26 Jan 2022 06:56 |

Last Modified: | 23 May 2022 01:10 |

URI: | http://eprints.unisza.edu.my/id/eprint/4906 |

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