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Document Type |
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Project |
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Document Title |
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Estimation of Horizontal Diffuse and inclined total Solar Radiation حساب الإشعاع الشمسي المنتشر الساقط على سطح أفقي و الإشعاع الكلي الساقط على سطح مائل . |
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Subject |
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Estimation of Horizontal Diffuse and inclined total Solar Radiation |
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Document Language |
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Arabic |
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Abstract |
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An accurate knowledge of the solar radiation data at a particular geographical location is of vital importance for the development of solar energy devices and for estimates of their performances. Unfortunately, for many developing countries, solar radiation measurements are not easily available because of not being able to afford the measuring equipments and techniques involved. Therefore, it is necessary to develop methods to estimate the solar radiation on the basis of the more readily available meteorological data. However, most solar radiation recording stations measure only the total horizontal solar intensity. Thus, it is a rather important to determine the beam and diffuse components of the total radiation incident on a horizontal surface. Once, these components are determined, they then can be transposed over tilted surfaces; hence, the performance of tilted flat-plate collectors and other solar devices can be estimated.Therefore, the aim of the present project is to correlate the monthly average daily diffuse fraction with the first, second and third orders of the monthly average daily clearness index ( ) or the fraction of possible number of sunshine hours for the location under study. Also, to correlate the ratio of to or the diffuse transmittance to the first, second and third orders of the ratio for the considered location. On the other hand, to develop empirical correlations for estimating the total solar radiation incident on inclined surfaces using isotropic and anisotropic models of diffuse radiation. To validate the obtained correlations, the estimated date will be compared with the measured ones. |
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Publishing Year |
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1428 AH
2007 AD |
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Added Date |
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Tuesday, July 13, 2010 |
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Researchers
| أحمد محمد السباعي | ElSebaii, Ahmed Mohamed | Investigator | Doctorate | |
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