D/iya, Sani G. and Toriman, Mohd Ekhwan and Gasim, Mohd Barzani and Gana, Usman M and Abdullahi, Musa G
(2015)
*The Correlation Functions and Estimation of Global Solar Radiation Studies Using Sunshine Based Model for Kano, Nigeria.*
Advances in Physics Theories and Applications, 39.
pp. 55-61.
ISSN 2224-719X (Printed) 2225-0638 (Online)

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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 modelH = H0 ( a +b n/No), the quadratic model H = H0 [ a +b n/No + c( n/No)2] and the cubic model H = H0 [ a +b( n/No )+ c( n/No)2 + d( n/No)3]. 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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Keywords: | solar radiation, sunshine hour, extraterrestrial radiation, Angstrom constants a and b, Kano state Nigeria |

Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > Q Science (General) |

Faculty / Institute: | East Coast Environmental Research Institute (ESERI) |

Depositing User: | Prof. Dr Muhammad Barzani Gasim |

Date Deposited: | 01 Jul 2015 01:01 |

Last Modified: | 01 Jul 2015 01:01 |

URI: | http://erep.unisza.edu.my/id/eprint/3458 |

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