Comparison of model and indirectly measured diffuse sky irradiances of tilted surfaces

Harrison, A. W.; Coombes, Charles A.

doi:10.1080/07055900.1988.9649299

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Harrison and Coombes [9] compared simulation results for angular positions of 30°, 60°, 90° for 10 variants of cloudiness degree and showed that Liu-Jordan isotropic model lead to an underestimation of radiation power density, while the anisotropic Klucher and Hay models cause overestimation by a small percentage. Kudish and Ianetz [10], using the same three mathematical models (Liu-Jordan, Klucher, Hay) for the geographical location 31°15' N, 34°47' E, demonstrated strong variability of tested models as a function of the season of the year, measurement time and location described primarily by latitude angle.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Distribution of Solar Radiation on a Two-Axis Tracking Plane for Photovoltaic Conversion

Frydrychowicz-Jastrzębska¹,

Bugała²

2015

Energies

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Abstract:The paper presents selected isotropic and anisotropic mathematical models to calculate the distribution of solar radiation on the photovoltaic module plane with any spatial orientation. A comparison of solar radiation models for Poland is based on measured data and received from the Institute of Meteorology and Water Management. Power density of solar radiation for different angular positions, especially for representative days of each month, was calculated. Based on the statistical analysis of the percentage root-mean-square error (RMSE%), mean-bias error (MBE%) and the Pearson correlation coefficient of an individual mathematical model, our own correction factor for diffuse radiation was proposed. A modified Liu-Jordan model was compared with six common mathematical models showing better agreement of measured and calculated values of solar radiation density. The presented analysis explains which mathematical model is the most suitable for central Poland (Poznań, 52°25' N, 16°56' E) and shows the validity of applying the modified model to improve the accuracy of determination of the radiation power density for a given elevation and azimuth angle using values for a horizontal plane.

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Section: Introductionmentioning

confidence: 99%