Results 21 to 30 of about 231,837 (281)

Clear-sky model for wavelet forecast of direct normal irradiance

Renewable Energy, 2017
Abstract Direct normal irradiance (DNI) is vital for concentrated solar thermal plants, and its value under clear sky condition is usually used as an important input of some forecasting models for solar irradiance. First of all, a semi-empirical model is developed for calculating the clear-sky DNI, and it is used to transform DNI into clear-sky index
Tingting Zhu, Haikun Wei, Xin Zhao, Chi Zhang, Kanjian Zhang   +4 more
semanticscholar   +2 more sources

Development of a Simple Methodology Using Meteorological Data to Evaluate Concentrating Solar Power Production Capacity

Energies, 2022
Evaluation of the Concentrating Solar Power capacity factor is critical to support decision making on possible regional energy investments. For such evaluations, the System Advisor Model is used to perform capacity factor assessments.
Ailton M. Tavares, Ricardo Conceição, Francisco M. Lopes, Hugo G. Silva   +3 more
doaj   +1 more source

Analysis of Measurements of Direct Normal and Global Solar Radiation for Maceió, Alagoas State, Northeastern Brazil [PDF]

Revista Brasileira de Meteorologia, 2020
Studying solar radiation is essential for human knowledge, since it is present in practically all its activities. Thus, the aim of this work was to analyze the climatic and seasonal variation of direct normal and global solar radiation in the region of ...
José Marcelo Lopes Júnior, José Leonaldo de Souza, Ricardo Araujo Ferreira Junior, Cícero Manoel dos Santos, Gustavo Bastos Lyra, Chigueru Tiba, Rosiberto Salustiano da Silva Júnior   +6 more
doaj   +1 more source

Direct Normal Irradiance Forecasting for High-Temperature Concentrated Solar Thermal Systems

Renewable Energy
Todd Neve, Makoto Shimizu, H. Yugami
semanticscholar   +2 more sources

AEROSOL OPTICAL DEPTH FROM SPECTRAL DIRECT NORMAL IRRADIANCE MEASUREMENTS IN MONTEVIDEO, URUGUAY [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
Aerosols are liquid or solid particles with diameters between 2.5 and 10 µm suspended in the lower layers of the atmosphere. Aerosol Optical Depth (AOD) is a relevant parameter that quantifies their concentration in the atmosphere.
P. Russo, A. Laguarda, G. Abal, G. Abal, L. Doppler   +4 more
doaj   +1 more source

Evaluation of Aerosols Impact on global and direct irradiance attenuation under clear sky condition: A case study in Morocco

Journal of Sustainable Development of Energy, Water and Environment Systems, 2023
In order to reduce the consumption of fossil fuels, solar energy is a promising alternative. However, solar potential depends on several atmospheric parameters.
Omaima El Alani, Mounir Abraim, Hicham Ghennioui, Abdellatif Ghennioui, Alae Azouzoute   +4 more
doaj   +1 more source

Solar Irradiance Nowcasting System Trial and Evaluation for Islanded Microgrid Control Purposes

Energies, 2022
The rapid increase in solar photovoltaic (PV) integration into electricity networks introduces technical challenges due to varying PV outputs. Rapid ramp events due to cloud movements are of particular concern for the operation of remote islanded ...
Remember Samu, Satya Girdhar Bhujun, Martina Calais, GM Shafiullah, Moayed Moghbel, Md Asaduzzaman Shoeb, Bijan Nouri   +6 more
doaj   +1 more source

Analyzing Regional and Local Changes in Irradiance during the 2019 Total Solar Eclipse in Chile, Using Field Observations and Analytical Modeling

Energies, 2021
Solar eclipses are astronomic phenomena in which the Earth’s moon transits between the planet and the Sun, projecting a shadow onto the planet’s surface.
Armando Castillejo-Cuberos, José Miguel Cardemil, Rodrigo Escobar   +2 more
doaj   +1 more source

Soiling impact on direct normal irradiation measurements [PDF]

AIP Conference Proceedings, 2019
Accurate and reliable solar radiation measurements are necessary to plan, finance and operate solar power projects. Soiling of sensors is an important source for underestimation of solar radiation. Earlier studies showed that especially pyrheliometers measuring direct normal irradiance (DNI) suffer from high susceptibility of dirt, while Rotating ...
Marko Schwandt, Jule Radtke, André Petersen, Anna Heimsath, Richard Meyer   +4 more
openaire   +1 more source

Experimental Evaluation of a Spectral Index to Characterize Temporal Variations in the Direct Normal Irradiance Spectrum

Applied Sciences, 2021
A simple index is desirable to assess the effects on both flat-plate and concentrating photovoltaics of natural changes in the solar spectrum. Some studies have suggested that the relationship between the Average Photon Energy (APE) and the shape of ...
G. Nofuentes, C. Gueymard, J. Caballero, Guilherme Marques-Neves, J. Aguilera   +4 more
semanticscholar   +1 more source