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A tree-based clear sky model for DNI forecasting
2018 Chinese Control And Decision Conference (CCDC), 2018Solar irradiance is a renewable energy that has been utilized by power plants. Direct normal irradiance (DNI) forecasting is a crucial approach to reduce the output uncertainty of solar power plants, and enhance reliability of power grids. According to statistics, the solar radiation of clear sky accounts for more than half of the total amount of ...
Yu Shen +4 more
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A comparative study of simple clear sky irradiance models
2016 International Conference on Electrical and Information Technologies (ICEIT), 2016The production of a photovoltaic (PV) system is intrinsically linked to the amount of radiation it absorbs. The irradiance impinging on the PV system is an attenuated version of the clear sky irradiance. The degree of this attenuation depends on the level of cloudiness. In this paper, we address the problem of clear sky irradiance modeling.
Abdoul Kader Sidibe +3 more
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Horizon brightness revisited: measurements and a model of clear-sky radiances
Applied Optics, 1994Clear daytime skies persistently display a subtle local maximum of radiance near the astronomical horizon. Spectroradiometry and digital image analysis confirm this maximum's reality, and they show that its angular width and elevation vary with solar elevation, azimuth relative to the Sun, and aerosol optical depth.
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Clear Sky Luminance Patterns: Analysis, Comparison and Modelling
Architectural Science Review, 1997In tropical, subtropical and temperate maritime climate regions the clear and quasi-clear skies are often the most frequent and relevant sources of daylight, therefore the measurement, analysis, and comparison of their luminance patterns as well as additional simultaneous daylight conditions is of considerable interest.
Richard Kittler +2 more
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Clear-Sky Radiation Models and Aerosol Effects
2019This chapter offers a description of the main factors that affect the transmission of solar radiation through the cloudless atmosphere, and the corresponding modeling approaches. The limitations of broadband modeling are discussed, and methodological improvements are described. A detailed discussion of the various inputs required by different clear-sky
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Spectral model for clear sky atmospheric longwave radiation
Journal of Quantitative Spectroscopy and Radiative Transfer, 2018Abstract An efficient spectrally resolved radiative model is used to calculate surface downwelling longwave (DLW) radiation (0 ∼ 2500 cm − 1 ) under clear sky (cloud free) conditions at the ground level. The wavenumber spectral resolution of the model is 0.01 cm − 1 and the atmosphere is represented by 18 non-uniform plane ...
Mengying Li +2 more
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Modeling of Day-to-Day Temporal Progression of Clear-Sky Land Surface Temperature
IEEE Geoscience and Remote Sensing Letters, 2013This letter presents a method to calculate the width ω over the half-period of the cosine term in a diurnal temperature cycle (DTC) model. ω deduced from the thermal diffusion equation (TDE) is compared with ω obtained from solar geometry. The results demonstrate that ω deduced from the TDE describes the shape of the DTC model more adequately around ...
Sibo Duan +5 more
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Short-term Solar Irradiance Prediction from Sky Images with a Clear Sky Model
2022 IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2022Huiyu Gao, Miaomiao Liu 0001
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Identifying the Best Clear Sky Model for the Delhi-NCR Region
IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium, 2022Mayank Jain +2 more
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Hourly clear-sky solar irradiance estimation in China: Model review and validations
Solar Energy, 2021Lunche Wang, Wenmin Qin
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