Results 101 to 110 of about 1,155,292 (161)

Reconstructed Total Solar Irradiance as a precursor for long-term solar activity predictions: a nonlinear dynamics approach [PDF]

open access: yesarXiv, 2012
Total solar irradiance variations, about 0.1% between solar activity maximum and minimum, are available from accurate satellite measurements since 1978 and thus do not provide useful information on longer-term secular trends. Recently, Krivova et al., 2007 reconstructed, using suitable models, the total solar irradiance from the end of the Maunder ...
arxiv  

High-Fidelity Solar Power Income Modeling for Solar-Electric UAVs: Development and Flight Test Based Verification [PDF]

open access: yesarXiv, 2017
Solar power models are a crucial element of solar-powered UAV design and performance analysis. During the conceptual design phase, their accuracy directly relates to the accuracy of the predicted performance metrics and thus the final design characteristics of the solar-powered UAV.
arxiv  

A certificação de qualidade em sistemas solares para aquecimento de água

open access: yes, 2003
Tendo em atenção a política nacional para o desenvolvimento do mercado da Energia Solar Térmica, motivada pela necessidade de uma maior utilização das Energias Endógenas (Resolução do Conselho de Ministros nº154/2001 de 27 de Setembro), descreve-se a situação actual na área dos Equipamentos Solares para Aquecimento de Água, no que diz respeito à ...
Costa, J. Cruz   +3 more
openaire   +1 more source

Fingerprints of a Local Supernova [PDF]

open access: yesarXiv, 2009
The results of precise analysis of elements and isotopes in meteorites, comets, the Earth, the Moon, Mars, Jupiter, the solar wind, solar flares, and the solar photosphere since 1960 reveal fingerprints of a local supernova (SN), undiluted by interstellar material. Heterogeneous SN debris formed the planets.
arxiv  

Micro/nanomaterials for improving solar still and solar evaporation -- A review [PDF]

open access: yesarXiv, 2019
In last decades, solar stills, as one of the solar desalination technologies, have been well studied in terms of their productivity, efficiency and economics. Recently, to overcome the bottleneck of traditional solar still, improving solar still by optimizing the solar evaporation process based on micro/nanomaterials have been proposed as a promising ...
arxiv  

Modelação de um sistema de aquecimento de água com suporte solar

open access: yes, 2021
O aproveitamento da energia solar para produção de água quente sanitária (AQS) reveste-se, por numerosas razões, de importância crescente. Objetivo deste trabalho consiste em avaliar o contributo da energia solar na produção de água quente sanitária. Para este estudo foram elaborados modelos de sistema convencional de AQS e sistema solar de AQS através
openaire   +1 more source

Desinfecção da água utilizando aquecimento solar

open access: yes, 2014
Pós-graduação em Agronomia (Energia na Agricultura ...
openaire   +1 more source

Aquecimento solar de água para a indústria

open access: yes, 2010
”Reduction and optimization” probably two of the words that are most mentioned in industry and global economy. The international markets are in troubles in several sectors, aggravated by the prices and the speculation about the quantity of existent fossil in the planet.
openaire   +1 more source

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