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首页> 外文期刊>International journal of green energy >ESTIMATION OF THE GLOBAL SOLAR RADIATION ON THE HORIZONTAL SURFACE FROM TEMPERATURE DATA FOR THE VHEMBE DISTRICT IN THE LIMPOPO PROVINCE OF SOUTH AFRICA
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ESTIMATION OF THE GLOBAL SOLAR RADIATION ON THE HORIZONTAL SURFACE FROM TEMPERATURE DATA FOR THE VHEMBE DISTRICT IN THE LIMPOPO PROVINCE OF SOUTH AFRICA

机译：从南非林波波省VHEMBE区的温度数据估算水平表面的全球太阳辐射

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摘要

The lack of grid lines in the remote rural areas of South Africa necessitates the use of the solar energy as an alternative energy resource. Solar radiation at a given location is one of the primary factors considered for the installation of renewable energy devices. In some developing countries, the estimation of solar radiation becomes a challenge due to the unavailability of limited weather data. One of the options to solve this problem is the use of the mean daily maximum and minimum air temperatures to estimate the global solar radiation of a particular area, so that the designer and the installer of the renewable energy systems can estimate the energy that can be harnessed in those areas and make decisions on the suitability of the technology to be installed. In the present study, an attempt has been made to estimate the global solar radiation from the observed mean daily maximum and minimum air temperatures for some selected stations in the Vliembe District of the Umpopo Province in South Africa and to lest the validity of the theoretical equation by Hargreaves and Samani. The computed values are compared with the weather station data. The value of the empirical coefficient K_r is also calculated and compared with the literature values. The yearly average value of K_r for each station was calculated and a value of 0.16 was obtained, which is equal to the value reported on the literature. A reasonable agreement between the estimated and observed solar radiation values suggests that this equation can be used to estimate a set of radiation data for this region.
机译：南非偏远农村地区缺乏电网，因此必须将太阳能用作替代能源。给定位置的太阳辐射是安装可再生能源设备时考虑的主要因素之一。在一些发展中国家，由于缺乏有限的天气数据，估计太阳辐射成为一项挑战。解决此问题的一种选择是使用平均每日最高和最低气温来估计特定区域的全球太阳辐射，以便可再生能源系统的设计者和安装者可以估算出利用这些领域，并决定要安装的技术的适用性。在本研究中，已尝试从南非Umpopo省Vliembe区某些选定站点的观测平均每日最高和最低气温估算全球太阳辐射，以免理论方程式的有效性由Hargreaves和Samani撰写。将计算出的值与气象站数据进行比较。还计算经验系数K_r的值，并将其与文献值进行比较。计算每个站点的K_r年平均值，并获得0.16的值，该值等于文献中报道的值。估算的太阳辐射值与观察到的太阳辐射值之间存在合理的一致性，表明该方程式可用于估算该区域的一组辐射数据。

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