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Measuring DNI with a New Radiometer Based on an Optical Fiber and Photodiode [PDF]
SensorsA new cost-effective radiometer has been designed, built, and tested to measure direct normal solar irradiance (DNI). The proposed instrument for solar irradiance measurement is based on an optical fiber as the light beam collector, a semiconductor ...
Alejandro Carballar +4 more
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Applied Sciences, 2023 This paper compares the daily sunshine duration (SD) measured by the Campbell–Stokes sunshine recorder (CS) with three automatic instruments (Kipp & Zonen pyranometers (CM6 B), pyrheliometer (CHP1) and CSD3 sunshine recorders).
Stelios Pashiardis +2 more
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A solar irradiance estimation technique via curve fitting based on dual-mode Jaya optimization
Frontiers in Energy Research, 2023 Solar irradiance is a crucial environmental parameter for optimal control of photovoltaic (PV) systems. However, precise measurements of the solar irradiance are difficult since the irradiation sensors (i.e., pyranometer or pyrheliometer) are expensive ...
Ziqiang Bi +5 more
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Calibrated digital images of Campbell–Stokes recorder card archives for direct solar irradiance studies [PDF]
Atmospheric Measurement Techniques, 2013 A systematic, semi-automatic method for imaging the cards from the widely used Campbell–Stokes sunshine recorder is described. We show how the application of inexpensive commercial equipment and practices can simply and robustly build an archive of high ...
A. M. Horseman +5 more
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Prediction of Circumsolar Irradiance and Its Impact on CSP Systems under Clear Skies
Energies, 2023 In this work, a model to estimate circumsolar normal irradiance (CSNI) for several half-opening angles under clear skies was developed. This approach used a look-up table to determine the model parameters and estimate CSNI for half-opening angles between
Edgar F.M. Abreu +2 more
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Radiometric Scale Transfer Using Bayesian Model Selection
Proceedings, 2020 The key input quantity to climate modelling and weather forecasts is the solar beam irradiance, i.e., the primary amount of energy provided by the sun.
Donald W. Nelson, Udo von Toussaint
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Energies, 2023 Energy nowcasting is a valuable asset in managing energy loads and having real-time information on solar irradiation availability. In this study, we evaluate the spectrally integrated outputs of the SENSE system for solar irradiance nowcasting for the ...
Ioannis-Panagiotis Raptis +9 more
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Comparison of aerosol optical depth from satellite (MODIS), sun photometer and broadband pyrheliometer ground-based observations in Cuba [PDF]
Atmospheric Measurement Techniques, 2018 In the present study, we report the first comparison between the aerosol optical depth (AOD) and Ångström exponent (AE) of the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments on the Terra (AODt) and Aqua (AODa) satellites and those ...
J. C. Antuña-Marrero +8 more
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Application of small angle approximation in circumsolar irradiance modelling
Solar Energy Advances, 2021 Circumsolar irradiance is the part of diffuse or scattered irradiance within a small angle (2.5° for typical pyrheliometers) around the sun which is measured, together with direct normal irradiance, by pyrheliometers and reported as part of the direct ...
Yi Qin +4 more
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Buildings, 2021 Solar radiation provides the most significant natural energy in buildings for space heating and daylighting. Due to atmospheric interference, solar radiation received at the Earth’s surface consists of direct beam and diffuse radiation, where diffuse can
Ochuko Kelvin Overen +2 more
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