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Comparing diffuse radiation models with one predictor for partitioning incident PAR radiation into its diffuse component in the eastern Mediterranean basin

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  • Jacovides, C.P.
  • Boland, J.
  • Asimakopoulos, D.N.
  • Kaltsounides, N.A.

Abstract

In the photosynthesis process, solar radiation energy is converted to chemical energy by using atmospheric CO2. That is, almost all living species depend on energy produced through photosynthesis for their nourishing components thus making photosynthesis vital to the earth's life. Nevertheless, the knowledge of photosynthetic photon flux density QP (PAR, 400–700 nm) is important in several applications dealing with plants physiology, biomass production, natural illumination in greenhouses and agricultural research. This study aiming to explore the applicability of several diffuse radiation empirical models, hourly measurements of diffuse PAR and global PAR irradiation collected at Athens (37°N, 23°E, 250 m above MSL) from 1 January 2000 to 31 December 2002, are employed. These data were used to establish an empirical model relating the spectral diffuse fraction, kdP (ratio of the diffuse-to-global PAR) with the fractional transmission of global PAR ktP (ratio of the global PAR-to-extraterrestrial solar PAR). The performance of the proposed empirical model was further compared with those of twelve other diffuse–global correlation models available in the literature in terms of the widely used statistical indicators mbe, rmse and t-test. From the overall analysis, it can be concluded that the proposed model predicts diffuse PAR values accurately, whereas most of the candidate empirical models examined here appear to be location-independent for the diffuse PAR predictions.

Suggested Citation

  • Jacovides, C.P. & Boland, J. & Asimakopoulos, D.N. & Kaltsounides, N.A., 2010. "Comparing diffuse radiation models with one predictor for partitioning incident PAR radiation into its diffuse component in the eastern Mediterranean basin," Renewable Energy, Elsevier, vol. 35(8), pages 1820-1827.
  • Handle: RePEc:eee:renene:v:35:y:2010:i:8:p:1820-1827
    DOI: 10.1016/j.renene.2009.11.015
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    References listed on IDEAS

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    1. Jacovides, C.P. & Kaskaoutis, D.G. & Tymvios, F.S. & Asimakopoulos, D.N., 2004. "Application of SPCTRAL2 parametric model in estimating spectral solar irradiances over polluted Athens atmosphere," Renewable Energy, Elsevier, vol. 29(7), pages 1109-1119.
    2. Oliveira, Amauri P. & Escobedo, João F. & Machado, Antonio J. & Soares, Jacyra, 2002. "Correlation models of diffuse solar-radiation applied to the city of São Paulo, Brazil," Applied Energy, Elsevier, vol. 71(1), pages 59-73, January.
    3. Jacovides, C. P. & Kontoyiannis, H., 1995. "Statistical procedures for the evaluation of evapotranspiration computing models," Agricultural Water Management, Elsevier, vol. 27(3-4), pages 365-371, July.
    4. Jacovides, C.P. & Varotsos, C. & Kaltsounides, N.A. & Petrakis, M. & Lalas, D.P., 1994. "Atmospheric turbidity parameters in the highly polluted site of Athens basin," Renewable Energy, Elsevier, vol. 4(5), pages 465-470.
    5. Jacovides, C.P. & Tymvios, F.S. & Assimakopoulos, V.D. & Kaltsounides, N.A., 2006. "Comparative study of various correlations in estimating hourly diffuse fraction of global solar radiation," Renewable Energy, Elsevier, vol. 31(15), pages 2492-2504.
    6. Boland, John & Ridley, Barbara & Brown, Bruce, 2008. "Models of diffuse solar radiation," Renewable Energy, Elsevier, vol. 33(4), pages 575-584.
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    2. Duan, Qiuhua & Feng, Yanxiao & Wang, Julian, 2021. "Clustering of visible and infrared solar irradiance for solar architecture design and analysis," Renewable Energy, Elsevier, vol. 165(P1), pages 668-677.

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