Results 21 to 30 of about 69,300 (310)

Parameters estimation and life cycle economic analysis of a PV powered tri-cycle in India [PDF]

open access: yesArchives of Electrical Engineering, 2018
This paper is devoted towards life cycle economic analysis (LCEA) of a solar photovoltaic (PV) powered tri-cycle. The paper is meant to propose a more systematic approach in determining the optimum use of scarce resources in order to determine the most ...
Soumya Das   +4 more
doaj   +1 more source

Relationship between the low-latitude coronal hole area, solar wind velocity, and geomagnetic activity during solar cycles 23 and 24

open access: yesEarth, Planets and Space, 2019
In order to statistically investigate the relationship between the low-latitude coronal holes (CHs), the solar wind speed, and the geomagnetic activity in solar cycles 23 (1996–2008) and 24 (2009–2016), we conducted a superposed epoch analysis of the ...
Yumi Nakagawa   +2 more
doaj   +1 more source

High-Efficiency Power Cycles for Particle-Based Concentrating Solar Power Plants: Thermodynamic Optimization and Critical Comparison

open access: yesEnergies, 2022
This paper investigates and compares several highly efficient thermodynamic cycles that are suitable for coupling with particle-in-tube fluidized-bed solar receiver technology.
Miguel Angel Reyes-Belmonte   +1 more
doaj   +1 more source

Five Solar Cycles of Solar Corona Investigations

open access: yesSolar Physics, 2022
AbstractThese are the memoirs of fifty years of research in solar physics, closely related to the history of three of the major solar space missions, from the Solar Maximum Mission, SMM, to Solar Orbiter, at present in navigation toward vantage points closer and closer to the Sun.
openaire   +2 more sources

Variation of Solar, Interplanetary and Geomagnetic Parameters during Solar Cycles 21-24 [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2013
The length of solar cycle 23 has been prolonged up to about 13 years. Many studies have speculated that the solar cycle 23/24 minimum will indicate the onset of a grand minimum of solar activity, such as the Maunder Minimum.
Suyeon Oh, Bogyeong Kim
doaj   +1 more source

Conventional and Advanced Exergy-Based Analysis of Hybrid Geothermal–Solar Power Plant Based on ORC Cycle

open access: yesApplied Sciences, 2020
Today, as fossil fuels are depleted, renewable energy must be used to meet the needs of human beings. One of the renewable energy sources is undoubtedly the solar–geothermal power plant.
Massomeh Alibaba   +5 more
doaj   +1 more source

Periodic Variation of Solar Flare Index for the Last Solar Cycle (Cycle 24)

open access: yesAdvances in Astronomy, 2021
In this study, we used the flare index (FI) data taken from Kandilli Observatory for the period of 2009–2020. The data sets are analyzed in three categories as Northern Hemisphere, Southern Hemisphere, and total FI data sets.
Atila Ozguc   +4 more
doaj   +1 more source

Thermodynamic Analysis and Sizing of a Small Scale Solar Thermal Power System Based on Organic Rankine Cycle

open access: yesJournal of Sustainable Development of Energy, Water and Environment Systems, 2020
This paper presents the feasibility analysis of a small-scale low-temperature solar organic Rankine cycle power system. The heat transfer fluid for running the organic Rankine cycle system is hot water with a temperature of 120 °C provided by an ...
Khaled Hossin   +2 more
doaj   +1 more source

Solar Cycle 23: An Anomalous Cycle? [PDF]

open access: yesThe Astrophysical Journal, 2004
The latest SOHO VIRGO total solar irradiance (TSI) time series is analyzed using new solar variability measures obtained from full-disk solar images made at the San Fernando Observatory and the Mg II 280 nm index. We discuss the importance of solar cycle 23 as a magnetically simpler cycle and a variant from recent cycles.
Giuliana de Toma   +5 more
openaire   +1 more source

The 8‐Year Solar Cycle During the Maunder Minimum

open access: yesAGU Advances, 2023
The presence of grand minima, characterized by significantly reduced solar and stellar activity, brings a challenge to the understanding of solar and stellar dynamo. The Maunder Minimum (1645–1715 AD) is a representative grand solar minimum.
Limei Yan   +10 more
doaj   +1 more source

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