Development and evaluation of empirical models for the estimation of hourly horizontal diffuse solar irradiance in the United Kingdom
Development and evaluation of empirical models for the estimation of hourly horizontal diffuse solar irradiance in the United Kingdom
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DOI：
10.1016/j.energy.2021.122820
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发表时间：
2021-12-14
期刊：
影响因子：
9
通讯作者：
Stone, David A.
中科院分区：
文献类型：
--
作者：
Munoz, Maria Nunez;Ballantyne, Erica E. F.;Stone, David A.
在许多应用中需要太阳辐射数据来获得太阳能输出。然而，太阳辐射数据并不总是可用的，特别是水平表面漫射太阳辐射。这导致了经验太阳能模型的创建来预测这些值。本文的目的是发展一个经验模型，用于估算水平表面上的每小时漫射太阳辐照度。最初，一组现有的经验模型进行了评估，以测试其准确性。新的模型已经开发出的全球和扩散水平的太阳辐射，已获得从英国的三个不同地区：南约克郡，诺福克，和西萨塞克斯郡的1982年和1999年之间的一段时间地面水平测量的基础上。为每个区域创建的模型将漫射分数（kd）和清晰度指数（kt）相关联，用于估计水平表面上的每小时漫射太阳辐照度。对为这三个区域开发的模型进行了评估，以使用误差直方图并通过对比不同的数据集来测试其准确性。最后，新模型与现有经验模型的比较表明，新开发的相关性显着改善了本研究中评估的三个地区的现有经验模型。(c)2021爱思唯尔有限公司版权所有。
Solar irradiation data is required in many applications to obtain the solar energy output. However, solar irradiation data is not always available, especially horizontal surface diffuse solar irradiation. This has led to the creation of empirical solar models to predict these values. The aim of this paper is to develop an empirical model for the estimation of hourly diffuse solar irradiance on horizontal surfaces. Initially, a set of existing empirical models have been evaluated to test their accuracy. New models have been devel-oped based on ground level measurements of global and diffuse horizontal solar irradiation that have been obtained from three different regions of the United Kingdom: South Yorkshire, Norfolk, and West Sussex for a period between 1982 and 1999. The models created for each region correlate the diffuse fraction (kd) and the clearness index (kt), for the estimation of hourly diffuse solar irradiance on hori -zontal surfaces. The models developed for the three regions were evaluated to test their accuracy using error histograms and by contrasting different datasets. Finally, a comparison of the new models to the existing empirical models showed that the new developed correlations significantly improved the existing empirical models for the three regions evaluated in this study. (c) 2021 Elsevier Ltd. All rights reserved.