Solar radiation attenuation in solar tower plants |
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| Authors: | Jesús Ballestrín Aitor Marzo |
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| Affiliation: | 1. Mechanical Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia;2. Center of Research Excellence in Renewable Energy (CoRE-RE), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia;1. IMUS - Instituto de Matemáticas de la Universidad de Sevilla, Spain;2. Dep. EDAN e IMUS, Universidad de Sevilla, Spain;1. Thermodynamics and Renewable Energies Group, School of Engineering, University of Seville. Camino de los Descubrimientos s/n, 41092 Seville, Spain;2. Centro Tecnológico Avanzado de Energías Renovables (CTAER), Paraje de los Retamares s/n; 04200 Tabernas (Almería), Spain |
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| Abstract: | With the advent of the first commercial solar power tower plants with a rated power in the 10–20 MW range, scale-up to larger 20–50 MW commercial plants is being considered (Lata et al., 2010, Herring, 2009) in the vast arid regions of the sunbelt. In the case of single-tower plants, the heliostat field size grows considerably and the heliostat–receiver slant range distances are often over 1 km. Solar radiation attenuation over these distances cannot be neglected and must be taken into consideration during plant design. The measurement of the atmospheric attenuation is not an easy task and the use of spectral atmospheric transmission models is necessary. We used the MODTRAN (MODerate resolution atmospheric TRANsmission) code to study the solar radiation attenuation at different slant range distances in different scenarios: rural atmosphere on a clear day (visibility 23 km) and rural atmosphere on a hazy day (visibility 5 km). |
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