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Journal of Renewable and Sustainable Energy / Volume 4 / Issue 1 / REGULAR ARTICLES

J. Renewable Sustainable Energy 4, 013105 (2012); http://dx.doi.org/10.1063/1.3682078 (12 pages)

Impacts of aerosols on available solar energy at Mbour, Senegal

Mamadou Drame1, Boudy Ould Bilal2, Moctar Camara3, Vincent Sambou2, and Amadou Gaye1

1Laboratoire de Physique de l’atmosphère et de l’Océan Siméon Fongang, Université Cheikh Anta Diop, BP 5085 Dakar-Fann, Senegal
2Centre International de Formation et de Recherche en Energie Solaire (CIFRES), BP 5085 Dakar Fann, Senegal
3Laboratoire d’océanographie, des sciences de l’environnement et du climat (LOSEC), UFR des Sciences et Technologies, Université de Ziguinchor, BP 523 Ziguinchor, Senegal

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(Received 23 January 2011; accepted 2 January 2012; published online 2 February 2012)

This study aims to evaluate the available solar potential (direct normal on the overall horizontal plane) and to estimate the observed impact of aerosols on solar radiation at Mbour, Senegal (16.958 °W; 14. 394 °N) using observations from solar instruments and AERONET during 2006. The results show the presence of a good available solar potential. At intra-seasonal timescale, the total and direct normal energy are stronger in May with a mean value of 7 kWh/m2/day and February with an average value of 5.50 kWh/m2/day. The lower available total and direct normal solar energies are, respectively, found in August (5.31 kWh/m2/day) and July (2.90 kWh/m2/day). The observations of AERONET show that aerosol optical depth values are higher in June (0.7) and lower in February (0.16). These results are consistent with the observed trends of total and direct normal energy during those months. Case studies of the influence of aerosols on available solar energy show a mean decrease of 10% and 28%, respectively, for the total and direct normal energies. This decrease does not vary much from the rainy season to the dry season, but there is a strong diurnal fluctuation in the rainy season probably due to the presence of cloud droplets.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. DATA AND METHODOLOGY
    1. Presentation of the site
    2. Presentation of instruments and data
    3. Global solar radiation on a horizontal plane
  3. RESULTS AND DISCUSSIONS
    1. Evaluation of solar potential
    2. Impact of aerosols on solar energy
    3. Frequency distribution of the total aerosol optical depth of aerosol
    4. Effects of aerosols on daily solar radiation
  4. CONCLUSION

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KEYWORDS and PACS

Keywords

aerosols, solar power, sunlight

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3682078

PUBLICATION DATA

ISSN

1941-7012 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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