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Temporal and spatial solar resource variation by analysis of measured irradiance in Geba catchment, North Ethiopia

机译:北埃塞俄比亚Geba集水区测量辐照区的时间和空间太阳能变化

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摘要

The availability of solar energy resource information in Ethiopia is limited due to the lack of ground measurement stations. The aim of this work was, therefore, to estimate the temporal variation and spatial distribution of solar radiation for Geba catchment located in the Northern part of Ethiopia based on four selected measurement sites. To achieve this, ground measurement data at ten-minute interval that has been recorded for five years was employed. Time series data and temporal variation analysis were done for all the sites. The spatial distribution analysis was carried out by interpolation of the data from the sites across the catchment using Inverse Distance Weight (IDW) method of the ArcGIS software.The temporal data analysis indicated higher solar radiation of greater than 5 kWh/m(2)/day during the dry months of September to May and in the range of 3-4 kWh/m(2)/day during the rainy season of June to August. The result of the analysis on spatial distribution of solar radiation showed 5%-7. 5% variation with daily average solar radiation of 5.6 kWh/m(2)/day across the catchment. Areas in central part around Mekelle and southern part around Mayderhu site have relatively higher solar radiation.
机译:由于缺乏地面测量站,埃塞俄比亚的太阳能资源信息的可用性受到限制。因此,这项工作的目的是估计基于四个选定的测量部位的埃塞俄比亚北部的Geba集水区的太阳能辐射的时间变化和空间分布。为实现这一目标,采用了已记录五年的十分钟间隔的地面测量数据。为所有站点进行时间序列数据和时间变化分析。通过使用ArcGIS软件的逆距离重量(IDW)方法通过从集装箱的网站的网站插值来进行空间分布分析。时间数据分析表明较高的太阳辐射大于5 kWh / m(2)/在9月的干旱月份,5月份的日子和3-4千瓦时/米(2)/日在6月至8月的日期间。太阳辐射空间分布分析的结果显示为5%-7。每日平均太阳辐射5%的变化为5.6千瓦时/米(2)/天内。 Mayderhu围绕Maykelle围绕梅克莱和南部的地区具有相对较高的太阳辐射。

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