Results 21 to 30 of about 58,091 (257)

Solar Cycle 25 Prediction Using N-BEATS

open access: yesThe Astrophysical Journal, 2023
Solar activities lead to Sun variation with an 11 yr periodicity. The periodic variation affects space weather and heliophysics research. So it is important to accurately predict solar cycle variations. In this paper, we predicted the ongoing Solar Cycle
Xu Su   +4 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

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

Understanding Solar Cycle Variability [PDF]

open access: yesThe Astrophysical Journal, 2017
Abstract The level of solar magnetic activity, as exemplified by the number of sunspots and by energetic events in the corona, varies on a wide range of timescales. Most prominent is the 11-year solar cycle, which is significantly modulated on longer timescales.
R. H. Cameron, M. Schüssler
openaire   +3 more sources

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

Solar wind parameters in rising phase of solar cycle 25: Similarities and differences with solar cycles 23 and 24

open access: yesSolar-Terrestrial Physics, 2023
Solar activity and solar wind parameters decreased significantly in solar cycles (SCs) 23–24. In this paper, we analyze solar wind measurements at the rising phase of SC 25 and compare them with similar data from the previous cycles. For this purpose, we
Yermolaev Y. I.   +8 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

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

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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