Results 11 to 20 of about 2,217 (261)

A New Index Assessing the Viability of PAR Application Projects Used to Validate PAR Models

open access: yesAgronomy, 2021
Photosynthetically active radiation (PAR) is a useful variable to estimate the growth of biomass or microalgae. However, it is not always feasible to access PAR measurements; in this work, two sets of nine hourly PAR models were developed.
Francisco Ferrera-Cobos   +2 more
doaj   +1 more source

Effects of Air Pollution on Sunshine Duration Trends in Typical Chinese Cities

open access: yesAtmosphere, 2022
Long-term trends in sunshine duration in Chinese cities have been closely linked to factors caused by air pollution. To understand this impact on sunshine duration (SD), surface solar radiation from 1981 to 2020, annual PM2.5 concentration from 2012 to ...
Wei Chong   +5 more
doaj   +1 more source

Performance of Dual-Axis Solar Tracker versus Static Solar System by Segmented Clearness Index in Malaysia

open access: yesInternational Journal of Photoenergy, 2013
The performance of Dual-Axis Solar Tracker (DAST) and Static Solar System (SSS) with respect to clearness index in Malaysia is presented. An attempt to investigate the correlation between clearness index with energy gain and efficiency of DAST over SSS ...
Jhee Fhong Lee   +2 more
doaj   +1 more source

Estimation of global solar radiation for Ikeja, Enugu and Kano, Nigeria

open access: yesJournal of Applied Sciences and Environmental Management, 2019
Estimations of global solar radiation based on a model of using normalized clearness index and normalized sunshine duration for a period of up to 25 years (1985-2010) for Ikeja (06.39°N, 03.20°E), Enugu (06.280N, 07.350E), and Kano (12.03 N, 08.32E ...
J.A. Akinpelu, O.K. Olawale, O.T. Omole
doaj   +1 more source

Deep-Learning-Based Adaptive Model for Solar Forecasting Using Clustering

open access: yesEnergies, 2022
Accurate short-term solar forecasting is challenging due to weather uncertainties associated with cloud movements. Typically, a solar station comprises a single prediction model irrespective of time and cloud condition, which often results in suboptimal ...
Sourav Malakar   +6 more
doaj   +1 more source

Relationship between photosynthetically active radiation and global radiation in Petrolina and Brasília, Brazil

open access: yesRevista Brasileira de Engenharia Agrícola e Ambiental, 2021
Photosynthetically active radiation (PAR) comprises the spectral range of global solar radiation (Rs) that is highly related to vegetation productivity.
Lady L. M. Custódio   +2 more
doaj   +1 more source

Solar Energy Potential Estimation in Perak Using Clearness Index and Artificial Neural Network

open access: yesMATEC Web of Conferences, 2014
In this paper solar energy potential has been estimated by two methods which are clearness index and artificial network (ANN) methods. The selected region is Seri Iskandar, Perak (4°24´latitude, 100°58´E longitude, 24 m altitude).
Assadi Morteza Khalaji   +2 more
doaj   +1 more source

Empirical Models for the Estimation of Solar Sky-Diffuse Radiation. A Review and Experimental Analysis

open access: yesEnergies, 2020
Accurate solar radiation data are essential for the development of solar energy application systems. The limited availability of solar radiation data, and especially diffuse irradiance values, makes it vital to develop models to estimate these data.
Saioa Etxebarria Berrizbeitia   +2 more
doaj   +1 more source

Hourly global horizontal irradiance data of three stations in Punjab, Pakistan

open access: yesData in Brief, 2021
This paper presents hourly Global Horizontal Irradiance (GHI) measured data at three stations (Lahore, Multan, Bahawalpur) in Punjab, Pakistan. The estimated GHI data from three reanalysis datasets have also been presented.
Zia ul Rehman Tahir   +4 more
doaj   +1 more source

Statistical analysis of cloud layers and solar irradiations for all seasons in Toyohashi city, Japan

open access: yesRenewable Energy and Environmental Sustainability, 2023
Several solar irradiation forecasting methods are being developed toward economically efficient solar power generation. Among these, the method that utilizes all sky imagers to estimate the direction of cloud movement above certain observation points is ...
Bando Takahiro   +8 more
doaj   +1 more source

Home - About - Disclaimer - Privacy