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Evaluation of various global solar radiation models for Nigeria

机译：评估尼日利亚各种全球太阳辐射模型

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摘要

This study assessed the performance of six solar radiation models. The objective was to determine the most accurate model for estimating global solar radiation on a horizontal surface in Nigeria. Twenty-two years meteorological data sets collected from the Nigerian Meteorological agency and the National Aeronautics and Space Administration for the three regions, covering the entire climatic zones in Nigeria were utilized for calibrating and validating the selected models for Nigeria. The accuracy and applicability of various models were determined for three locations (Abuja, Benin City, and Sokoto), which spread across Nigeria using seven viable statistical indices. This study found that the estimation results of considered models are statistically significant at the 95% confidence level, but their accuracy varies from one location to another. However, the multivariable regression relationship deduced in terms of sunshine ratio, air temperature ratio, maximum air temperature, and cloudiness performs better than other relationships. The multivariable relationship has the least root mean square error and mean absolute bias error, not exceeding 1.0854 and 0.8160 MJ m(-2) day(-1), respectively, and monthly relative percentage error in the range of +/- 12% for the study areas.
机译：这项研究评估了六个太阳辐射模型的性能。目的是确定最准确的模型，以估计尼日利亚水平面上的全球太阳辐射。从尼日利亚气象局和美国国家航空航天局收集的涵盖尼日利亚整个气候区的22年气象数据集用于校准和验证尼日利亚的选定模型。在三个地点（阿布贾，贝宁市和索科托）确定了各种模型的准确性和适用性，这些地点分布在尼日利亚，使用了七个可行的统计指标。这项研究发现，考虑模型的估计结果在95％置信水平上具有统计学意义，但其准确性在一个位置到另一个位置之间有所不同。但是，根据日照比，气温比，最高气温和阴天推断出的多元回归关系要比其他关系更好。多变量关系具有最小的均方根误差和平均绝对偏差误差，分别不超过1.0854和0.8160 MJ m（-2）day（-1），并且每月相对百分比误差在+/- 12％的范围内学习区。

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