Results 11 to 20 of about 231,837 (281)
Trends in direct normal irradiance in Oregon: Comparison of surface measurements and ISCCP-derived irradiance [PDF]
Geophysical Research Letters, 2007 Long‐term pyrheliometer measurements of direct normal irradiance at three sites in Oregon are compared to irradiance calculated from data of the International Satellite Cloud Climatology Project. An increase of direct normal irradiance of up to 1 W/m2 per year between 1980 and 2004 is found in the measured data.
Laura Riihimäki
exaly +2 more sources
Direct normal irradiance predictions using broadband models for Indian stations
Energy Reports, 2020 In this paper three parametric models CPCR2, MLWT2 and REST have been used to compute direct normal irradiance (DNI) for five Indian stations, namely New Delhi, Pune, Jaipur, Kolkata and Mumbai.
Laxmi Narain Rohilla, Dinesh Kumar Singh
doaj +2 more sources
Modern deep neural networks for Direct Normal Irradiance forecasting: A classification approach
e-Prime: Advances in Electrical Engineering, Electronics and EnergyThe escalating energy demand and the adverse environmental impacts of fossil-fuel use necessitate a shift towards cleaner and renewable alternatives.
Muhammad Saud Ul Hassan +3 more
doaj +2 more sources
Direct normal irradiance related definitions and applications: The circumsolar issue [PDF]
Solar Energy, 2014 AbstractThe direct irradiance received on a plane normal to the sun, called direct normal irradiance (DNI), is of particular relevance to concentrated solar technologies, including concentrating solar thermal plants and concentrated photovoltaic systems.
Wald Lucien +2 more
exaly +5 more sources
Inter-hour direct normal irradiance forecast with multiple data types and time-series
Journal of Modern Power Systems and Clean Energy, 2019 Boosted by a strong solar power market, the electricity grid is exposed to risk under an increasing share of fluctuant solar power. To increase the stability of the electricity grid, an accurate solar power forecast is needed to evaluate such ...
Tingting Zhu +5 more
doaj +2 more sources
Comparison of Solar Radiation Models to Estimate Direct Normal Irradiance for Korea
Energies, 2017 Reliable solar radiation data are important for energy simulations in buildings and solar energy systems. Although direct normal irradiance (DNI) is required for simulations, in addition to global horizontal irradiance (GHI), a lack of DNI measurement ...
Hyun-Jin Lee +2 more
doaj +3 more sources
Forecasting, 2020 Direct Normal Irradiance (DNI) predictions obtained from the Integrated Forecasting System of the European Centre for Medium-Range Weather Forecast (IFS/ECMWF) were compared against ground-based observational data for one location at the south of ...
Paulo Canhoto +2 more
exaly +2 more sources
A model for deriving the direct normal and diffuse horizontal irradiance from the global tilted irradiance [PDF]
Solar Energy, 2015 Abstract A separation model was developed for deriving the direct normal irradiance (DNI) and the diffuse horizontal irradiance (DHI) from the global tilted irradiance (GTI). The model is based on the DIRINT model, but substitutes the use of the GTI in place of the global horizontal irradiance (GHI) for determining the global clearness index ( K t ).
exaly +2 more sources
Remote Sensing, 2020 Nowadays, it is of great interest to know and forecast the solar energy resource that will be constantly available in order to optimize its use. The generation of electrical energy using CSP (concentrated solar power) plants is mostly affected by ...
Román Mondragón +6 more
doaj +2 more sources
Mobile sensor for clouds shadow detection and direct normal irradiance estimation
Solar Energy, 2022 José M. Aguilar-López +4 more
semanticscholar +2 more sources