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Preprint ARTICLE | doi:10.20944/preprints202401.0302.v1

Radio Emission and Observations from the Solar Transition Region

Baolin Tan, Jing Huang, Yin Zhang, Yuanyong Deng, Linjie Chen, Fei Liu, Jin Fan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar transition region; radio emission; magnetic field; gradient

Online: 4 January 2024 (03:11:59 CET)

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Preprint REVIEW | doi:10.20944/preprints201707.0062.v1

The Central Role of Chemistry in the Transition to the Solar Economy

Mario Pagliaro

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: sol-gel; solar energy; bioeconomy; catalysis; nanochemistry

Online: 21 July 2017 (11:30:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201812.0172.v1

Region Asymmetric Polymers Based on Fluorinated Benzothiadiazole-Benzodithiophene for Polymer Solar Cells with High Open-Circuit Voltage

Caijun Liu, Guoyue Gan, Zhanfeng Li, Na Sun, Xueqiao Li, Yahui Tong, Hua Wang, Yuying Hao

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: polymer solar cells; region asymmetric polymers; fluorinated benzothiadiazole

Online: 14 December 2018 (09:56:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202409.1604.v1

Numerical Estimation of Productivity for Single Slope Solar Stills in the Caspian Region

Dinmukhambet Baimbetov, Yelnar Yerdesh, Yelizaveta Karlina, Samal Syrlybekkyzy, Tanja Radu, Mohanraj Murugesan, Yerzhan Belyayev

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Solar Still; Thermal Desalination; Caspian Region; Climatic Impact; Heat Balance Model

Online: 20 September 2024 (09:08:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1778.v1

The Transition to a Renewable Energy Electric Grid in the Caribbean Island Nation of Antigua and Barbuda

Patrick Hoody, Andrew Chiasson, Robert J. Brecha

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: Renewable Energy; Concentrating Solar Power; Hydrogen Storage; Just Transition; Electric Grid; Caribbean

Online: 26 June 2023 (09:59:31 CEST)

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Working Paper ARTICLE

Baseline Levels of Vitamin D in a Healthy Population from a Region with High Solar Irradiation

Alicia García-Dorta, Lillian Medina-Vega, Jacobo Javier Villacampa-Jiménez, Marta Hernández-Díaz, Sagrario Bustabad-Reyes, Enrique González-Dávila, Federico Díaz-González

Subject: Medicine And Pharmacology, Dietetics And Nutrition Keywords: Vitamin D levels; population-based distribution; healthy adults; high solar irradiation.

Online: 8 April 2021 (12:17:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201904.0221.v1

Economic and Environmental Multi-objective Optimization of a Wind-Solar-Fuel Cell Hybrid Energy System in the Colombian Caribbean Region

Guillermo Valencia, Aldair Benavides, Yulineth Cardenas

Subject: Engineering, Energy And Fuel Technology Keywords: fuel cell; wind energy; solar energy; hybrid energy system; Colombian caribbean region; multi-objective optimization

Online: 19 April 2019 (11:40:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0163.v1

Is There a Relationship Between Climate, Morphology and Urbanization and COVID19? Preliminary Analysis of Environmental and Pandemic Data in the Lombardy Region (Northern Italy)

Massimiliano Fazzini, Claudio Bna, Alessandro Cecili, Andrea Giuliacci, Sonia Illuminati, Fabrizio Pregliasco, Claudia Baresi, Enrico Miccadei

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Coronavirus disease 2019 (COVID-19), temperate sub-continental climate, Lombardy, temperature, solar radiation

Online: 6 August 2020 (11:39:41 CEST)

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The coronavirus disease 2019 (COVID-19) pandemic is the defining global health and socioeconomic crisis of our time and represents the greatest challenge faced by the world since the end of the Second World War. The academic literature indicates that climatic features, specifically the temperature and absolute humidity, are very important factors affecting infectious pulmonary disease epidemics (e.g., SARS, MERS); however, the influence of climatic parameters on COVID-19 remains extremely controversial. The goal of this study is to quantify the existing relationship between several daily climate parameters (temperature, relative humidity, accumulated precipitation, solar radiation, wind direction and intensity, and evaporation), local morphological parameters, and new daily positive swabs for COVID-19, which represents the only parameter that can be statistically used to quantify the pandemic. The daily deaths parameter was not considered because it is not reliable due to frequent administrative errors. Daily data on meteorological conditions and new cases of COVID-19 were collected for the Lombardy area from March 1, 2020, to April 20, 2020. This region in Italy exhibited the largest number of official deaths in the world per million inhabitants, with a value of approximately 1700 per million on june 30, 2020. Moreover, the apparent lethality was approximately 17% in this area, mainly due to the considerable housing density and the extensive presence of industrial and craft areas. The Mann-Kendall test and multivariate statistical analysis showed that none of the considered climatic variables exhibited statistically significant relationships with the epidemiological evolution of COVID-19, at least in the spring months in temperate subcontinental climate areas, with the exception of solar radiation, which was directly related and showed an otherwise low explained variability of approximately 20%. Furthermore, the average temperatures of two highly representative meteorological stations of Molise and Lucania, the most weakly affected by the pandemic. The temperatures at these stations were approximately 1.5°C lower than that in the cities in Lombardy of Bergamo and Brescia, again confirming that a significant relationship between the increase in temperature and decrease in virology from COVID-19 was not evident, at least in the Italian peninsula.

Preprint ESSAY | doi:10.20944/preprints202002.0298.v3

Father Verspieren and Mali Aqua Viva: Lessons Learned from Fighting Drought and Poverty with Photovoltaic Solar Energy in Africa

Mario Pagliaro

Subject: Engineering, Energy And Fuel Technology Keywords: photovoltaics; solar energy; Father Verspieren; solar energy in Africa; rainwater harvesting; solar pump

Online: 3 April 2020 (03:38:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201612.0070.v2

Models for Calculating Monthly Average Solar Radiation from Air Temperature in Swaziland

Mgidi D. Dlamini, Alakaparampil J. Varkey, Simiso Mkhonta

Subject: Environmental And Earth Sciences, Environmental Science Keywords: solar energy; solar radiation; climatic data; solar radiation estimation

Online: 6 November 2017 (12:02:45 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0499.v1

Detection of Solar Neutrons and Solar Neutron Decay Protons

Yasushi Muraki, Tatsumi Koi, Yutaka Matsubara, Satoshi Masuda, Pedro Miranda, Shoko Miyake, Tsuguya Naito, Ernesto Ortiz Fragoso, Akitoshi Oshima, Takashi Sako, Shoichi Shibata, Hisanori Takamaru, Munetoshi Tokumaru, Jose Franco Valdes-Galicia, Kyoko Watanabe

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar flare; impulsive flare; gradual flare; solar comic-rays; solar energetic particles; particle acceleration; solar neutrons

Online: 8 November 2023 (06:44:03 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1382.v1

Analysis of Losses Associated with Series Resistance (Rs) in Simple-Structured c-Si Solar Cells

Manuel J Heredia-Rios, Luis Hernandez-Martinez, Monico Linares-Aranda, Javier Flores-Méndez, Mario Moreno-Moreno

Subject: Engineering, Electrical And Electronic Engineering Keywords: photovoltaic; solar energy; solar cells; series resistance

Online: 18 January 2024 (09:10:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.0514.v1

Performance Improvement of a Solar Assisted Absorption Cooling System Integrated with Latent Heat Thermal Energy Storage

Lana Migla, Raimonds Bogdanovics, Kristina Lebedeva

Subject: Engineering, Other Keywords: LHTES; PCM; solar energy; solar cooling system

Online: 7 June 2023 (08:29:17 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202409.0620.v1

Design and Development of a Low-Cost Parabolic Type Solar Dryer and Its Performance Evaluation in Drying of King Fish – Case Study in Oman

Talal Al Haddabi1, Amuthakkannan Rajakannu

Subject: Engineering, Energy And Fuel Technology Keywords: Solar Energy; Parabolic Solar trough; Solar dryer; evacuated copper tube absorber; Specific heat

Online: 9 September 2024 (08:43:09 CEST)

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Dry Fish is a rich source of proteins and nutrients and can be eaten in many forms. Oman is one of the important fish producers in the world and having high demand in neighboring countries for Oman’s fish. Fishery sector is considered as one of the important economic development sector in sultanate of Oman. In the fishery sector, use of technology is not up to the mark because of less awareness of technology application among Omani fishermen. Also, there is a demand for a greater number of cold storages in different regions to store fresh fishes which is not materialized yet. Similarly, there is a demand of perfect and cheap technology in Oman to dry fishes to improve the profit to the fishermen. Solar energy is abundantly available in Oman and there are high possibilities in Oman to use solar energy in domestic and industrial applications. Since the sunlight is available throughout the year, it is possible to convert in to thermal energy or electrical energy. Electricity can be produced from photovoltaic principle (PV) or indirectly with concentrated solar power. Similarly, we can use solar concentrators for many thermal applications. The solar dryer is a device which is used to dry fruits, vegetables, leaves, clothes etc. If any of the items are dried with the help of solar energy, then we can save lot of non-renewable source of energy and can help to improve economy of the country. The sun can, at least seasonally at Oman’s latitudes, provide a substantial part of the energy needed for various applications. In this work, we used solar dryer to make dry fish with high quality. Use of parabolic type concentrator to dry the fish is an effective solution which is an innovative idea to the fishermen. The temperature variation in dryer is directly proportional to the intensity of solar. The tracking mechanism is a combination of electronic and mechanical design which tracks the sun automatically. In this work, a parabolic concentrator with automatic tracking mechanism was designed and the performance analysis have been done. In the design, copper tubes are used for heat transfer and then the hot fluid is circulated in the box which is used to dry the fishes. As per the experiment, fish drying efficiency obtained from solar dryer is 77.9% and it took 3 days to dry king fish of 20kg. There are many advantages in parabolic type solar concentrators relate to the quality of dryness in the fishes and time taken to dry the fishes which are elaborately discussed in this paper. This solar dryer technology will improve green environment and also will save non-renewable sources of sultanate of Oman for longer period of time.

Preprint ARTICLE | doi:10.20944/preprints202402.0922.v1

Simulation and Experimental Results for Energy Production Using Hybrid Photovoltaic Thermal Technology

Roxana Margareta Grigore, Sorin Gabriel Vernica, Sorin Eugen Popa, Ioan Viorel Banu

Subject: Engineering, Energy And Fuel Technology Keywords: energy efficiency; solar energy; solar irradiance; solar photovoltaic thermal (PV/T) systems; temperature

Online: 18 February 2024 (11:52:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202208.0085.v2

The Inner and Backside Solar Flares

Ramy Mawad

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: The Sun; Solar Flare; Solar Core; Solar Interior layers; Radiative Zone; Convection Zone

Online: 5 August 2022 (14:59:45 CEST)

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Preprint REVIEW | doi:10.20944/preprints202407.1069.v1

Direct Solar Thermal Water Splitting Using Iron Electrodes at High Temperatures - A Review

Manuel Fuentes, Diego Pulido, Edward Fuentealba, Alvaro Soliz, Norman Toro, Atul Sagade, Felipe M. Galleguillos Madrid

Subject: Engineering, Chemical Engineering Keywords: Solar thermochemical; water splitting; iron corrosion; solar reactors

Online: 12 July 2024 (14:14:16 CEST)

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Preprint REVIEW | doi:10.20944/preprints202310.1913.v3

Design of Photovoltaic System for Green Manufacturing by using Statistical Design of Experiments

Debo Brata Paul Argha, Md Ashik Ahmed

Subject: Engineering, Civil Engineering Keywords: Solar PV system; Regression Model; DOE; Solar energy; Fossil fuels

Online: 9 November 2023 (10:58:47 CET)

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Preprint ARTICLE | doi:10.20944/preprints202207.0192.v1

Film Properties Using Metal Salts Washing for Perovskite Solar Cells

Ankit Stephen Thomas

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: Perovskites; Solar cells; Film formation; Solar energy; Doping

Online: 13 July 2022 (08:40:00 CEST)

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Preprint REVIEW | doi:10.20944/preprints201811.0625.v1

Encapsulation of Organic and Perovskite Solar Cells: A Comprehensive Review

Ashraf Uddin, Mushfika Baishakhi Upama, Haimang Yi, Leiping Duan

Subject: Physical Sciences, Chemical Physics Keywords: organic solar cells; perovskite solar cells; encapsulation; stability

Online: 30 November 2018 (09:38:24 CET)

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Preprint ARTICLE | doi:10.20944/preprints202008.0674.v1

Design and Programming of a Micro-Controller-Based Solar Tracking System

Saman Sarkawt Jaafar, Farhad Muhsin Mahmood

Subject: Engineering, Energy And Fuel Technology Keywords: Solar cell energy; Single Axial Solar Tracking System; Solar cell efficiency; Arduino Uno Board

Online: 30 August 2020 (15:34:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0839.v1

Lifetime of Long-Lived Sunspot Groups

Judit Muraközy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Solar physics; Sunspots; Sunspot groups; Sunspot cycle; Solar magnetic fields; Solar active region magnetic fields

Online: 12 June 2024 (12:21:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1592.v1

New Physically-Based Mathematical Model and Experiments for a Recently Invented Solar Pot

Márton Rátkai, Gábor Géczi, Richárd Kicsiny, László Székely

Subject: Engineering, Mechanical Engineering Keywords: solar cooking; solar pot; mathematical modelling; simulation results; measurements

Online: 24 June 2024 (08:16:07 CEST)

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Preprint REVIEW | doi:10.20944/preprints202311.0761.v1

A Review of Photovoltaic Failure and Degradation Mechanisms

Hussain Al Mahdi, Paul G Leahy, Mohammad Alghoul, Alan P. Morrison

Subject: Engineering, Electrical And Electronic Engineering Keywords: photovoltaics; reliability; degradation; failure mechanism; solar cells; solar modules

Online: 13 November 2023 (10:16:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.1615.v1

Optimizing Solar Potential Analysis in Cuba: A Methodology for High-Resolution Regional Mapping

Javier Domínguez, Carlo Bellini, Ana María Martín, Luis F. Zarzalejo

Subject: Environmental And Earth Sciences, Geography Keywords: solar mapping; GIS; solar resources; solar radiation; renewable energies; rural electrification; sustainable development; High-Resolution Models

Online: 22 August 2024 (06:00:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0486.v1

Optical Design of a Miniaturised Solar Magnetograph for Space Applications

Ariadna Calcines, Lucie M. Green, Alan Smith, David M. Long

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar magnetograph; space weather; space sciences; solar instrumentation; miniaturised optics

Online: 9 October 2023 (11:10:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.0270.v2

An Improved Cheetah Optimizer for Accurate and Reliable Estimation of Unknown Parameters in Photovoltaic Cell/Module Models

Zulfiqar Ali Memon, Mohammad Amin Akbari, Mohsen Zare

Subject: Engineering, Electrical And Electronic Engineering Keywords: Solar energy; metaheuristics; optimization; energy management; solar cell; photovoltaic modeling

Online: 6 July 2023 (09:31:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0488.v1

The Solar Energy Potential of Greece for Flat-Plate Solar Panels Fixed on Dual-Axis Systems

Harry D. Kambezidis, Konstantinos Mimidis, Kosmas A. Kavadias

Subject: Environmental And Earth Sciences, Environmental Science Keywords: solar energy potential; maximum energy; inclined surfaces; solar tracking; Greece

Online: 8 May 2023 (09:08:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202210.0244.v1

A Comprehensive Empirical Analysis on Performance Assessment of Different Solar Cookers

Ibadullah Safdar, Muhammad Zahid, Saeed Mian Qaisar, Asad Waqar, Elsayed Tag Eldin, Tehseen Ilahi, Tausif Zahid, Naif Alsharabi

Subject: Engineering, Electrical And Electronic Engineering Keywords: Cooking power; Solar energy; Solar radiations; Sun tracking.; Emperical Analysis

Online: 18 October 2022 (03:21:26 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201811.0518.v1

A GIS-Based Method for Identification of Wide area Rooftop Suitability for Minimum Size PV Systems Using LiDAR Data and Photogrammetry

Diane Palmer, Elena Koubli, Ian Cole, Ralph Gottschalg, Thomas Betts

Subject: Engineering, Energy And Fuel Technology Keywords: solar; LiDAR; rooftop photovoltaics; building characteristics; wide-area solar yield

Online: 21 November 2018 (06:59:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints202205.0085.v1

Calorimetric Testing of Solar Thermal Absorbers for High Vacuum Flat Panels

Carmine D’Alessandro, Davide De Maio, Antonio Caldarelli, Marilena Musto, Francesco Di Giamberardino, Matteo Monti, Teresa Mundo, Emiliano Di Gennaro, Roberto Russo, Vittorio G. Palmieri

Subject: Physical Sciences, Applied Physics Keywords: Selective Solar Absorber; Solar Absorptance; Thermal Emittance; Evacuated Flat Panel; Calorimeter; High Vacuum Flat Panel; Solar Simulator

Online: 7 May 2022 (02:52:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1325.v1

Performance Analysis of a 50 MW Solar PV Installation at BUI Power Authority: A Comparative Study Between Sunny and Overcast Days

Rahimat Oyiza Yakubu, Muzan Williams Ijeoma, Hammed Yusuf, Abdulazeez Alhaji Abdulazeez, Peter Acheampong, Michael Carbajales-Dale

Subject: Engineering, Energy And Fuel Technology Keywords: Solar PV System; Solar Radiation; AC Energy Output; Performance Ratio; System Yield; Capacity Factor; Solar PV Performance Analysis

Online: 19 June 2024 (08:09:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0548.v1

An Analytical Approach to Power Optimization of Concentrating Solar Power Plants with Thermal Storage

Andrii Cheilytko, Spiros Orestis Alexopoulos, Andriy Pozhuyev, Oliver Kaufhold

Subject: Engineering, Energy And Fuel Technology Keywords: concentrated solar power; thermal storage; hybrid solar power plants; design factor; solar multiple factor; optimization model; analytical approach

Online: 10 May 2024 (03:32:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202410.1762.v1

Thermal Analysis of Radiation Heat Transfer of an Improved Fractal Solar Collectors

Adylkhan Talgatovich Kibishov, Gülenay Alevay Kılıç, Nassim Tulegenovich Rustamov, Naci Genc

Subject: Engineering, Mechanical Engineering Keywords: solar energy; fractal solar collector; thermal analysis; heat transfer; renewable energy

Online: 24 October 2024 (14:16:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0208.v1

Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24

Ali Kilcik, Atila Ozguc, Jean-Pierre Rozelot

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Solar cycles; Solar flares; Geomagnetic activity indices; Cosmic rays; Period analysis

Online: 3 November 2023 (11:23:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0486.v1

MHD Simulation in the Solar Corona to Obtain Conditions for the Acceleration of Cosmic Rays during Solar Flares

Alexander Podgorny, Igor Podgorny, Alexei Borisenko

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar flare; solar cosmic rays; current sheet; magnetohydrodynamic simulation; active region

Online: 28 February 2023 (02:23:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202208.0046.v2

Solar Activity Cycles Recur Epidemic and Pandemic Viruses: Space Weather Alerts

Ramy Mawad, Hanafy M. Madbouly, Ehab M. B. Mahdy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Space weather; Solar terrestrial connection; Climate change; Solar cycle; Environment; Epidemiology

Online: 12 January 2023 (02:36:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202001.0072.v1

Thermal Efficiency of a Concentrating Solar Collector Under High-Vacuum

Davide De Maio, Carmine D' Alessandro, Daniela De Luca, Marilena Musto, Emilano Di Gennaro, Giuseppe Rotondo, Roberto Russo

Subject: Engineering, Energy And Fuel Technology Keywords: solar energy; Compound Parabolic Concentrators (CPC); high vacuum insulated solar collectors

Online: 9 January 2020 (05:31:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints201907.0101.v1

Design and Analysis of Domestic Micro-Cogeneration Potential for an ORC System Adapted to a Solar Domestic Hot Water System

Daniel Leal-Chavez, Ricardo Beltran-Chacon, Paola Cardenas-Terrazas, Saul Islas, Nicolas Velazquez

Subject: Engineering, Energy And Fuel Technology Keywords: solar domestic cogeneration; Organic Rankine Cycle; acetone; evacuated tube solar collector

Online: 8 July 2019 (04:15:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201812.0091.v1

Solar Power Interpolation and Analysis Using Spatial Autocorrelation

Syed Muhammad Ahsan Gillani

Subject: Engineering, Energy And Fuel Technology Keywords: solar power interpolation; solar power attenuation; spatial autocorrelation; semi-variograms; geosatistics

Online: 7 December 2018 (03:55:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints201805.0062.v1

A Study on Photostability of Amphetamines and Ketamine in Hair Irradiated under Artificial Sunlight

Giorgia Miolo, Marianna Tucci, Luca Menilli, Giulia Stocchero, Susanna Vogliardi, Salvatore Scrivano, Massimo Montisci, Donata Favretto

Subject: Medicine And Pharmacology, Pharmacology And Toxicology Keywords: hair; solar light; photodegradation; amphetamines; MDMA; ketamine; photoproduct; photostability; solar simulator

Online: 3 May 2018 (09:11:57 CEST)

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Background: Drug incorporated in hair are exposed to the environment and to cosmetic and chemical treatments, with possible decrease of their content. Knowledge concerning the effect of sun light on drug content in hair can be helpful to the forensic toxicologist, in particular when investigating on drug concentrations above or below pre-determined cut-offs. Materials and Methods: Twenty authentic positive hair samples were selected that had previously tested positive for amphetamines and/or ketamine. Washed hairs were divided into two identical strands: the former was exposed at 765 W/m² (310–800 nm spectrum of irradiance) for 48 hours in a solar simulator, the latter was kept in the dark. Hair samples were extracted and analyzed by LC-HRMS detection. The percent photodegradation was calculated for each analyte (amphetamine, methamphetamine, methylendioxyamphetamine methylendioxymethamphetamine, ketamine, norketamine). In parallel, photodegradation processes of standard molecules dissolved in aqueous and organic solutions were studied. Results: In 20 hair samples positive for the targeted analytes, exposure to artificial sun light induced an appreciable decrease of drug concentrations. The concentration ranges in the non-irradiated hair samples were 0.01–24 ng/mg; 65% of samples exhibited a decrease in post-irradiation samples, with reduction from 3% to 100%. When more drugs were present in the same hair sample (e.g, MDMA and ketamine) the degradation yields were compound dependent. A degradation product induced by irradiation of ketamine in aqueous and methanol solutions was identified; it was also found to be present in a true positive hair sample after irradiation. Conclusions: Ketamine, amphetamines and their metabolites incorporated in hair of drug users undergo degradation when irradiated by artificial sunlight. Only for ketamine a photoproduct was identified in irradiated standard solutions and in true positive irradiated hair. When decisional cut-offs are applied to hair analysis, photodegradation must be taken into account since sunlight may produce false negative results. Moreover, new markers could be investigated as evidence of illicit drug use.

Preprint REVIEW | doi:10.20944/preprints202403.0300.v2

A review on the present and future of solar power in Africa

Ahmed Rachid, Nouhaila NAJMI

Subject: Physical Sciences, Other Keywords: Solar energy; Development; Africa; Solar farms; Mini-grids; Off-grid; Solar houses; Irrigation; Legislation; Business models; NGOs; International companies

Online: 14 March 2024 (09:34:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202007.0695.v1

Performance Study of Integrated Solar-Water Supply System for Isolated Agricultural Areas in Thailand: Two Case-Study Villages of The Royal Initiative Project

Thanongsak Imjai, Kamon Thinsurat, Pakorn Ditthakit, Warit Wipulanusat, Monthian Setkit, Reyes Garcia

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: water resource management; solar-water; solar-water supply system; SWSS; decision support; solar pumping; climate change; royal initiative project

Online: 29 July 2020 (11:40:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0951.v1

Looking for the Optimal Shape of a Photovoltaic Panel

Eduardo Diedrich

Subject: Engineering, Energy And Fuel Technology Keywords: Optima Shape; Solar Panel

Online: 16 October 2023 (09:37:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0488.v9

The Solar System: Nature and Mechanics

Mario Ljubičić

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar system; complete relativity; nature; mechanics

Online: 19 July 2023 (09:29:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202410.2232.v1

Performance Simulation and Optimization of Cylindrical Mirror Spliced Parabolic Trough Solar Collector

Bowen Liu, Vian Mbabazi, Weidong Huang

Subject: Energy And Fuel Technology, Engineering Keywords: spliced cylindrical mirror; trough solar system; concentration ratio; solar energy; spherical aberration

Online: 30 October 2024 (08:00:31 CET)

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Preprint REVIEW | doi:10.20944/preprints202401.2160.v1

Advancements in Photovoltaic Cell Materials: Silicon, Organic, and Perovskite Solar Cells

Abniel Machín, Francisco Márquez

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: photovoltaic cells; silicon-based solar cells; organic-based cells; perovskite solar cells

Online: 31 January 2024 (05:53:39 CET)

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Preprint REVIEW | doi:10.20944/preprints202309.2044.v1

A Review of Photocatalytic Water Splitting for Hydrogen Production Using Tandem Solar Cell

Nur Ain Atiqah Mohd Amin, Hayyiratul Fatimah Mohd Zaid

Subject: Engineering, Chemical Engineering Keywords: photocatalytic water splitting; photoelectrochemical cell; dye solar cell; tandem solar cell; hydrogen

Online: 29 September 2023 (08:05:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0706.v1

Solar Business in an Oil-Rich Country? A Socio-technical Investigation of Solar PV Businesses in Iran

Leila Aghlimoghadam

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: solar business; solar PV; social acceptance; energy transition; oil-rich country; Iran

Online: 21 April 2023 (09:49:31 CEST)

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Taking a socio-technical perspective, I focus on solar businesses (niche market actors) in Iran. As one of the key stakeholder groups whose business prosperity is tied to the development of solar PV, they play a crucial role in accelerating the energy transition. Given the incumbent fossil-based electricity sector in Iran and the least enabling policies, I am first interested to find (i) the main drivers and barriers of solar businesses; and (ii) the roles these solar businesses play in bringing solar PV deployment forward in Iran. I collected the data via 20 semi-structured interviews with solar businesses in Golestan, Guilan, Tehran, Khorasan Razavi, and Eastern Azerbaijan Provinces in Iran. Taking an inductive approach, I considered sustainability transition and social acceptance theories as sensitising concepts to investigate common and specific points of solar business acceptance in Iran. I find ecological awareness, belief in intergenerational justice, and willingness to innovate, as the main intrinsic drivers and socioeconomic opportunity and tackling the energy imbalance as extrinsic drivers; while the lack of a common vision with the energy governors, and the low knowledge of solar PV among the customers, escalating prices, and challenges to accessing good quality solar equipment are the most prior obstacles. Moreover, I understand educating people, driving the innovative deployment of solar PV, and facilitating the diffusion of it, as the major roles of solar businesses in Iran. I find that the sustainability transition literature overlooked the key role of solar businesses specially in fossil-based and developing economies. My findings suggest that the positive intrinsic mechanisms among the solar businesses, in combination with better-enabling policy frameworks and external factors, like lifting the sanctions and joining the global energy market, climate change mitigation commitments and standards, can help solar businesspeople to lead and accelerate solar PV development in Iran.

Preprint ARTICLE | doi:10.20944/preprints202409.1955.v1

Honeycomb Cell Structures Formed in Drop-Casting CNT Films for Highly Efficient Solar Absorber Applications

Saiful Islam, Hiroshi Furuta

Subject: Physical Sciences, Applied Physics Keywords: solar absorber; spectral selectivity; Honeycomb structure; drop casting technique; CNTs; solar radiation intensity

Online: 25 September 2024 (11:45:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1635.v1

Monitoring and Remote Control of Solar Tracker Using MQTT Technologies

Tomás Inglés Muñoz, Antonio Guerrero-González, Francisco Lloret Abrisqueta

Subject: Engineering, Energy And Fuel Technology Keywords: Dual-axis solar tracker; 4.0 technologies; IoT; SCADA; energy efficiency; Photovoltaic solar energy

Online: 23 September 2024 (10:10:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1134.v1

The Mother's Day Solar Storm of 11 May 2024 and Its Effect on Earth's Radiation Belts

Viviane Pierrard, Alexandre Winant, Edith Botek, Maximilien Péters de Bonhome

Subject: Physical Sciences, Space Science Keywords: geomagnetic storm; solar energetic particles; solar event; radiation belts; energetic protons; relativistic electrons

Online: 14 September 2024 (10:38:34 CEST)

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Preprint REVIEW | doi:10.20944/preprints202408.1025.v1

Solar Energy Resource and Power Generation in Morocco: Current Situation, Potentials and Future Perspective

Rania Benbba, Majd Barhdadi, Antonio Ficarella, Giovanni Manente, Maria Pia Romano, Nizar El Hachemi, Abdelfettah Barhdadi, Ahmed Al-Salaymeh, Abdelkader Outzourhit

Subject: Engineering, Energy And Fuel Technology Keywords: Solar Energy; Photovoltaic; CSP; solar thermal; Morocco; Renewable Energy; sustainable development; strategic investment

Online: 14 August 2024 (16:51:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0138.v1

Design and Optimization of Electrical Parameters of Perovskites-based Thin Film Solar Cell

Muhammad Muneeb Khan, Sadiq Ahmad, Ali Hassan, And Furqan Shaukat

Subject: Engineering, Energy And Fuel Technology Keywords: Electrical Parameters; Perovskite; Optimization; Renewable Power; SCAPS-1D; PVSyst; Solar Module; Solar Cell

Online: 2 April 2024 (09:25:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.1854.v1

SISA: The First Extreme-Ultraviolet Solar Integral Field Spectrograph Using Slicers

Ariadna Calcines Rosario, Hamish Andrew Sinclair Reid, Sarah Matthews, Frédéric Auchère, Alain Jody Corso, Giulio Del Zanna, Jaroslav Dudik, Samuel Gissot, Laura Hayes, Graham Stewart Kerr, Christian Kintziger, Sophie Musset, Vanessa Polito, Daniel F. Ryan, David Orozco Suárez

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: EUV Spectroscopy; solar IFS; EUV slicers; image slicers; solar space mission; particle acceleration

Online: 29 November 2023 (10:56:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202111.0572.v1

Synthesis and Characterization of Al-doped NiO Nanostructured Thin Films Elaborated by Solar Spray Pyrolysis Technique, for Photovoltaic Cells

Abdelbaki NID, Lilia ZIGHED, Yacine AOUN, Bedreddine MAAOUI

Subject: Physical Sciences, Applied Physics Keywords: Nickel oxide; Thin films; Al doping ratio; Solar spray pyrolysis; Solar heater; Furnace.

Online: 30 November 2021 (13:29:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints201902.0074.v1

Solar Green Roofs: A Unified Outlook Twenty Years On

Rosaria Ciriminna, Francesco Meneguzzo, Mario Pecoraino, Mario Pagliaro

Subject: Biology And Life Sciences, Ecology, Evolution, Behavior And Systematics Keywords: solar energy; solar green roof; energy transition; biosolar roof; green roof; air pollution

Online: 7 February 2019 (13:02:10 CET)

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Preprint ARTICLE | doi:10.20944/preprints202204.0187.v1

Gravity-Assist Might be a Solution to Save Earth from Global Warming

Sohrab Rahvar

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: Dynamics; Solar System; Global Warming

Online: 20 April 2022 (08:53:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202003.0162.v1

A Publicly Available Cost Simulation of Sustainable Construction Options for Residential Houses

Lawrence Fulton, Bradley Beauvauis, Matthew Brooks, Scott Kruse, Kim Lee

Subject: Engineering, Architecture, Building And Construction Keywords: construction; rainwater harvesting; simulation; solar

Online: 10 March 2020 (10:26:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints201810.0452.v1

Solar Neutrinos Spectroscopy with Borexino Phase-II

Lino Miramonti, M. Agostini, K. Altenmueller, S. Appel, V. Atroshchenko, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, D. Bick, I. Bolognino, G. Bonfini, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, S. Caprioli, M. Carlini, P. Cavalcante, F. Cavanna, A. Chepurnov, K. Choi, L. Collica, S. Davini, A. Derbin, X.F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, K. Fomenko, A. Formozov, D. Franco, F. Gabriele, C. Galbiati, M. Gschwender, C. Ghiano, M. Giammarchi, A. Goretti, M. Gromov, D. Guffanti, C. Hagner, T. Houdy, E. Hungerford, Aldo Ianni, Andrea Ianni, A. Jany, D. Jeschke, V. Kobychev, D. Korablev, G. Korga, T. Lachenmaier, M. Laubenstein, E. Litvinovich, F. Lombardi, P. Lombardi, L. Ludhova, G. Lukyanchenko, L. Lukyanchenko, I. Machulin, G. Manuzio, S. Marcocci, J. Maricic, J. Martyn, E. Meroni, M. Meyer, M. Misiaszek, L. Papp, O. Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, A. Porcelli, G. Raikov, G. Ranucci, A. Razeto, A. Re, M. Redchuk, A. Romani, N. Rossi, S. Rottenanger, S. Schönert, D. Semenov, M. Skorokhvatov, O. Smirnov, A. Sotnikov, L.F.F. Stokes, Y. Suvorov, R. Tartaglia, G. Testera, J. Thurn, M. Toropova, E. Unzhakov, A. Vishneva, R.B. Vogelaar, F. von Feilitzsch, S. Weinz, M. Wojcik, M. Wurm, Z. Yokley, O. Zaimidoroga, S. Zavatarelli, K. Zuber, G. Zuzel

Subject: Physical Sciences, Particle And Field Physics Keywords: solar neutrinos; neutrino oscillation; Borexino

Online: 19 October 2018 (11:49:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202410.0375.v1

Daily Estimates of Global Radiation in the Brazilian Amazon by Simplified Models

Charles Campoe Martim, Rhavel Salviano Dias Paulista, Daniela Castagna, Daniela Roberta Borella, Frederico Terra de Almeida, João Gabriel Ribeiro Damian, Adilson Pacheco de Souza

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: solar radiation; solar energy; minimum meteorological data; empirical estimation models; statistical indicators; Amazon biome

Online: 7 October 2024 (09:43:44 CEST)

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Preprint REVIEW | doi:10.20944/preprints202307.0803.v1

The Trend of Solar Energy Utilization and Its Offshore Assessment in Nigeria

Wasiu Olalekan Idris, Mohd Zamri Ibrahim, Aliashim Alibani

Subject: Engineering, Energy And Fuel Technology Keywords: solar PV system; renewable energy system; solar radiation; net present value; cost of electricity

Online: 12 July 2023 (11:44:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0397.v1

Effect Of The Aerosol Vertical Distribution On The Modelling Of Solar Radiation

Ilias Fountoulakis, Kyriakoula Papachristopoulou, Emmanouil Proestakis, Vassilis Amiridis, Charalampos Kontoes, Stelios Kazadzis

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: aerosol profile; aerosol extinction coefficient; aerosol radiative effects; spectral solar radiation; solar radiation profile

Online: 26 January 2022 (12:52:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints202008.0162.v2

Efficiency of Selective Solar Absorber in High Vacuum Flat Solar Thermal Panels: The Role of Emissivity

Davide De Maio, Carmine D'Alessandro, Antonio Caldarelli, Marilena Musto, Daniela De Luca, Emiliano Di Gennaro, Roberto Russo

Subject: Engineering, Energy And Fuel Technology Keywords: thermal emittance; conversion efficiency; selective solar absorber; thermal energy; evacuated flat panel; solar energy

Online: 20 October 2020 (12:18:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201804.0318.v2

Techno-Economic Feasibility of Hybrid Solar Photovoltaic and Battery Energy Storage Power System for a Soshanguve Mobile Cellular Base Station in South Africa

Banjo Ayoade Aderemi, SP Daniel Chowdhury, Thomas O. Olwal, Adnan M. Abu-Mahfouz

Subject: Engineering, Electrical And Electronic Engineering Keywords: Solar PV, Green Energy, Hybrid Power Source, Mobile Cellular Base Station, OPEX, Solar Irradiance

Online: 25 July 2018 (14:30:45 CEST)

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Over the years, sustainability, impact on the environment, as well as the operation expenditure have been a major concern to the deployment of mobile cellular base stations worldwide. This is because the mobile cellular base stations are known to consume a high percentage of power within the mobile cellular network. Such energy consumption contributes to the emission of Greenhouse Gases (GHG) through the use of conventional diesel generating a set. As a result, the mobile cellular operators are faced with the dilemma of minimising the power consumption, GHG emission, and the operation cost, while improving the Quality of Service of the networks. In attempting to find a solution, this study presents the feasibility and simulation of a solar photovoltaic (PV) with battery hybrid power system (HPS) as a predominant source of power for a specific mobile cellular base station site situated in Soshanguve area of the city of Pretoria, South Africa. It also presents the technical development, showed the environmental advantage and cost benefits of using a solar PV-battery HPS to power a base station site of a 24 hrs daily load of 241.10 kWh/d and the peak load of 20.31 kW as compared to using the HPS of solar PV-diesel generating set-battery. The solar resource pattern for the city of Pretoria was collected from The National Aeronautics and Space Administration and modelled statistically. Thus, the statistical modelling done using solar radiation resource exposure characteristic patterns of Pretoria, South Africa, revealed an average annual daily solar radiation of 5.4645 Wh/m2/d and 0.605 clearness index. The simulation and the design were done using the Hybrid Optimization Model for Electric Renewables and Matlab/Simulink software. The simulation finding shows that the HPS of solar PV-battery combination has about 59.62 % saving on Net Present Cost, Levelized Cost of Energy, and 80.87% saving on Operating cost as against conventional BS powered with Gen Set-Battery.

Preprint ARTICLE | doi:10.20944/preprints202409.1447.v1

Photothermal Conversion Performance of Fe3O4/ATO Hybrid Nanofluid for Direct Absorption Solar Collector

Jeonggyun Ham, Hyemin Kim, Honghyun Cho

Subject: Engineering, Mechanical Engineering Keywords: hybrid nanofluid; optical properties; solar weight absorption coefficient; photothermal conversion coefficient; direct absorption solar collector

Online: 19 September 2024 (07:48:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.1520.v1

Formulation of an Efficiency Model Valid for High Vacuum Flat Plate Collectors

Eliana Gaudino, Antonio Caldarelli, Roberto Russo, Marilena Musto

Subject: Engineering, Energy And Fuel Technology Keywords: solar energy; High Vacuum Flat Plate Collectors; HVFP; Thermal efficiency model; Solar collector performance evaluation

Online: 24 October 2023 (13:05:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0174.v1

Open-source Photovoltaic - Electrical Vehicle Carport Designs

Nicholas Vandewetering, Koami Soulemane Hayibo, Joshua M. Pearce

Subject: Engineering, Civil Engineering Keywords: open-source; photovoltaic; mechanical design; electric vehicle; solar energy; solar carport; electric vehicle charging station

Online: 13 September 2022 (10:41:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1516.v1

Optimal Sizing, Energy Balance, Load Management and Performance Analysis of a Hybrid Renewable Energy System

Kelvin Nkalo Ukoima, Okoro Ogbonnaya, Patrick Ifeanyi Obi, Akuru Bola, Innocent Ewaen

Subject: Engineering, Electrical And Electronic Engineering Keywords: Feasibility; Hybrid; Power; Homer; Solar; Wind

Online: 20 September 2024 (10:42:04 CEST)

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Preprint CONCEPT PAPER | doi:10.20944/preprints202405.1294.v2

Panel Surface Area Maximization for Increasing PV Performance

Moses Oyaro Okello

Subject: Computer Science And Mathematics, Geometry And Topology Keywords: geometry; shape optimisation; photovoltaic; solar energy; renewable energy; system advisor model

Online: 5 September 2024 (10:13:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.1346.v1

A Study on the Recovery of Valuable Metals from Solar Cells Using Acid Leaching and Substitution Reactions

Kim Hyun Jong, Erdenebold Urtnasan, Jei-Pil Wang

Subject: Engineering, Metallurgy And Metallurgical Engineering Keywords: solar cell; recovery; silicon; silver; leaching

Online: 21 November 2023 (14:24:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0730.v1

Synergistic Zinc(II) and Formate Doping of alpha-FAPbI₃ Perovskite: Thermal Stabilization and Enhanced Photoluminescence Lifetime

Merk M. Hoeksma, René M. Williams

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: solar cells; formamidinium; lead; iodide; alloys

Online: 13 November 2023 (10:03:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints202307.1858.v2

Thermospheric Density Response to the Solar Activity and QBO

Bo Li, Ruifei Cui, Libin Weng, Jianfang Fei

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: thermospheric density; GAMDM; QBO; solar activity

Online: 31 July 2023 (11:23:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0055.v1

A Feasibility Analysis of a Solar Power Plant with Direct Steam Generation System in Sonora, Mexico

Ernesto Enciso Contreras, Juan Gabriel Barbosa-Saldaña, Jesus de la Cruz Alejo, Claudia Del C. Gutiérrez-Torres, Jose Alfredo Jimenez Bernal, Maria Belem Arce Vazquez

Subject: Engineering, Mechanical Engineering Keywords: PTC; DSG; solar energy; power plant

Online: 3 March 2023 (03:44:17 CET)

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Preprint REVIEW | doi:10.20944/preprints202109.0508.v2

How Fast Is the Distance between Earth and the Sun Changing in the Solar System?

Jim Henry, Mesut Yurukcu, George Nnanna

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Solar System; Earth; Sun; Expansion; Universe

Online: 12 October 2021 (14:27:15 CEST)

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Working Paper ARTICLE

Mechanics of the Gyroscopic Precession and Calculation of the Galactic Mass

Jian Sun, Ting Xu, Zheng Jiao, Hui Wang

Subject: Physical Sciences, Acoustics Keywords: gyroscopic precession; solar system; galactic mass

Online: 25 May 2021 (11:16:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0138.v1

Effects of Aerosols and Clouds on the Levels of Surface Solar Radiation and Solar Energy in Cyprus

Ilias Fountoulakis, Panagiotis Kosmopoulos, Kyriakoula Papachristopoulou, Panagiotis-Ioannis Raptis, Rodanthi-Elisavet Mamouri, Argyro Nisantzi, Antonis Gkikas, Jonas Witthuhn, Sebastian Bley, Anna Moustaka, Johannes Buehl, Patric Seifert, Diofantos G. Hadjimitsis, Charalampos Kontoes, and Stelios Kazadzis

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: solar energy; dust; aerosol; clouds; Cyprus

Online: 7 May 2021 (10:36:00 CEST)

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Preprint REVIEW | doi:10.20944/preprints202103.0260.v1

Current Status, Scenario, and Prospective of Renewable Energy in Algeria: A Review

Younes Zahraoui, M. Reyasudin Basir Khan, Ibrahim Al Hamrouni, Saad Mekhilef, Mahrous Ahmed

Subject: Engineering, Automotive Engineering Keywords: Algeria; Africa; Renewable Energy; Solar; PENREE

Online: 9 March 2021 (10:50:33 CET)

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Preprint ARTICLE | doi:10.20944/preprints201912.0407.v1

Re-desiging and Fabrication of the Contact Area of a Solar Milk Pasteurizer

Enebe Vincent, Moveh Samuel

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: re-designing; fabrication; solar; milk; pasteurizer

Online: 31 December 2019 (10:22:43 CET)

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Preprint DATA DESCRIPTOR | doi:10.20944/preprints201811.0120.v2

SolarView: Georgia Solar Adoption in Context

Jacqueline Hettel Tidwell, Abraham Tidwell, Steffan Nelson, Marcus Hill

Subject: Engineering, Energy And Fuel Technology Keywords: solar; technology adoption; demographics; mixed methods

Online: 30 November 2018 (15:47:46 CET)

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Working Paper HYPOTHESIS

Hypothesis and Feasible Mechanism for Appearance of Post-Post-Fe Nuclei in Solar System

Elizabeth Pavlova-Tito, Vadim I. Pavlov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hypothesis, Fission, Heavy Post-Post-Fe Elements, Solar System

Online: 23 July 2019 (11:17:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202211.0095.v1

Solar System-Like Systems with Special Reference to Relativistic Quantum Mechanics and Weak Gravitational Field

Peter Gara

Subject: Physical Sciences, Quantum Science And Technology Keywords: Solar system-like systems; Relativistic Quantum Mechanics; Weak Gravity; Proper Time Scale of the Solar System

Online: 4 November 2022 (13:42:21 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.1097.v1

Assessing the Wind Power Potential in Naama, Algeria to Complement Solar Energy through Integrated Modeling of the Wind Resource and Turbine Wind Performance

Sekkal Mohammed Chakib, Ziani Zakarya, Mahdad Moustafa Yassine, Baghli Mohammed Haris, Bessenouci Mohammed Zakaria

Subject: Engineering, Other Keywords: Wind power; solar photovoltaics; hybrid systems; complementary generation; correlated resources; wind speed analysis; turbine simulation; evening wind patterns; solar irradiance; renewable energy integration; wind-solar system; Algeria

Online: 18 September 2023 (13:34:26 CEST)

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Preprint REVIEW | doi:10.20944/preprints202305.1534.v1

A Review of State-of-the-art and Short-Term Forecasting Models for Solar PV Power Generation

Wen-Chang Tsai, Chia-Sheng Tu, Chih-Ming Hong, Whei-Min Lin

Subject: Engineering, Energy And Fuel Technology Keywords: Predictive models; Weather research and forecasting (WRF); Solar irradiance forecasting; Solar PV power forecasting; Renewable energy sources.

Online: 23 May 2023 (02:32:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202106.0166.v1

Effects of Natural Weathering on the Performance of High Solar Reflective Index Paint Surfaces Exposed in Harsh Climatic Conditions of United Arab Emirates

Tirumala Uday Kumar Nutakki, Waqar Ullah Kazim

Subject: Engineering, Automotive Engineering Keywords: Cool materials; cool coatings; solar reflective index; solar reflectance; thermal emittance; natural weathering; green buildings; reflective paints

Online: 7 June 2021 (11:13:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.0866.v1

Solar Energy Resources in Jordan: The Current Situation, The Potentials, and a Future Perspective

Ahmed Al-Salaymeh, Antonio Ficarella, Walaa Al-Smadi, Hussein Sa'id Daoud, Bilal Al-Salaymeh, Sara Qutishat, Neofytos P. Komninos, Martin Hauer, Gianpiero Colangelo, Ali Aghazadeh Ardebili, Antonella Longo, Maria Pia Romano, Ahmad Sakhrieh

Subject: Engineering, Energy And Fuel Technology Keywords: Solar Energy; PV; PV regulation; MENA Countries

Online: 13 August 2024 (08:44:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.0002.v1

Advanced Perovskite-Silicon Tandem Solar Cells: Enhancing Efficiency and Stability

Chris Bell, Ayoolu Olukemi, Abram Gracias

Subject: Engineering, Other Keywords: Perovskite-Silicon Tandem Solar Cells; Efficiency; Stability

Online: 1 August 2024 (11:56:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0332.v1

Astromineralogy of the Nearby Exoplanetary Systems I: A Comparative Analysis of the Stellar and the Averaged Solar Mg/Si and Fe/Si Molar Ratios

Péter Futó, Arnold Gucsik, Irakli Simonia, György Kajati

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Solar System, element abundances, exoplanets, astromineralogy planets

Online: 6 June 2024 (07:47:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0514.v1

Experimental Analysis of a Polygeneration System: Assessment of the Thermal Sub-system

Andre Rodrigues, Ana Palmero-Marrero, Joao Soares, Szabolcs Varga, Armando Coelho Oliveira

Subject: Engineering, Mechanical Engineering Keywords: polygeneration; solar; ejector; thermal storage; cooling; heating

Online: 9 February 2024 (02:39:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1237.v1

Spatiotemporal Evolution of the Land Cover over Deception Island, Antarctica, Its Driving Mechanisms and Its Impact on the Shortwave Albedo

Javier F. Calleja, Rubén Muñiz, Jaime Otero, Francisco Navarro, Carleen Reijmer, Miguel Ángel De Pablo, Susana del Carmen Fernández

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: cryosphere; albedo; landscape; air temperature; solar radiation

Online: 16 January 2024 (12:36:52 CET)

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The aim of this work is to provide a full description of how air temperature and solar radiation induce changes in the land cover over an Antarctic site. We use shortwave broadband albedo (albedo integrated in the range 300-3000 nm) from a spaceborne sensor and from field surveys to calculate the monthly relative abundance of landscape units. Field albedo data were collected using a portable albedometer over seven landscape units: clean fresh snow; clean old snow; rugged landscape composed of dirty snow with disperse pyroclasts and rocky outcrops; dirty snow; stripes of bare soil and snow; shallow snow with small bare soil patches; bare soil. MODIS MCD43A3 daily albedo product was downloaded using the Google Earth Engine API from the 2000-2001 season to the 2020-2021 season. Each landscape unit was characterized by an albedo normal distribution. The monthly relative abundance of the landscape units were calculated by fitting a linear combination of the normal distributions to the histogram of the MODIS monthly mean albedo. The monthly relative abundance of the landscape unit consisting of rugged landscape composed of dirty snow, with dispersed clasts and small rocky outcrops exhibits a high linear positive correlation with the monthly mean albedo (R2=0.87) and a high linear negative correlation with the monthly mean air temperature (R2= 0.69). The increase of the solar radiation energy flux from September to December coincides with the decrease of the relative abundance of the landscape unit composed of dirty snow with dispersed clasts and small rocky outcrops. We propose a mechanism to describe the evolution of the landscape: uncovered pyroclasts act as melting centres favouring the melting of surrounding snow. Ash does not play a decisive role in the melting of the snow. The results also explain the observed decreasing of the thaw depth of the permafrost on the island in the period 2006-2014, resulting from an increase in the snow cover over the whole island.

Preprint ARTICLE | doi:10.20944/preprints202401.0061.v1

Green Hydrogen Driven by Wind and Solar- an Australian Case Study

Glen Currie, Edward Behrens, Samual Bolitho, Michael Coen, Thomas Wilson

Subject: Engineering, Energy And Fuel Technology Keywords: Australia; electrolysis; energy transition; hydrogen; solar; wind

Online: 2 January 2024 (09:38:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.0528.v1

The Protective Role of Canopy Cover against Cork Oak Decline in the Face of Climate Change

João Ribeiro, Constança Camilo-Alves, Nuno Ribeiro

Subject: Environmental And Earth Sciences, Other Keywords: mortality; management; solar radiation; diachronic; climatic resilience

Online: 7 December 2023 (12:46:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0044.v1

A Forecasting Global Solar Radiation System Using Combined Supervised- and Unsupervised-learning Models

Chih-Chiang Wei, Yen-Chen Yang

Subject: Engineering, Energy And Fuel Technology Keywords: solar radiation; prediction; cluster algorithm; neural network

Online: 1 November 2023 (09:44:39 CET)

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Preprint COMMUNICATION | doi:10.20944/preprints202308.1223.v1

Solar Disc Concentrator: Material Selection for the Receiver

Margherita Perrero, Davide Papurello

Subject: Engineering, Energy And Fuel Technology Keywords: solar concentrator; thermal stress; material selection; receiver

Online: 17 August 2023 (09:48:03 CEST)

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Preprint REVIEW | doi:10.20944/preprints202306.2237.v1

Tracking-integrated CPV technology: State-of-the-art and classification

Maria A. Ceballos, Pedro J. Pérez-Higueras, Eduardo F. Fernández, Florencia M. Almonacid

Subject: Environmental And Earth Sciences, Other Keywords: concentrator photovoltaic; solar tracker; optics; tracking-integrated

Online: 30 June 2023 (11:23:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0076.v1

Performance Improvement of PCDTBT: PC70BM Polymer Solar Cells with 1,8-diiodooctane Solvent Additive

Wenjuan Yu, Jiale Yang, Bingting Wang, Xiang Fu, Changhai Zhou, Haijun Zhou, Guoxiong Xie, Kexiu Dong, Gan Jin

Subject: Physical Sciences, Optics And Photonics Keywords: polymer solar cells; solvent additive; DIO; PCDTBT

Online: 6 May 2022 (11:44:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0163.v1

Junction Configuration Effects on the Photovoltaic Parameters of a-Si/CZTS Solar Cells

H. Bitam, B. Hadjoudja, Beddiaf Zaidi, C. Shakher, S. Gagui, Muhammad Sana Ullah

Subject: Engineering, Electrical And Electronic Engineering Keywords: CZTS; a-Si; Solar cells; SCAPS; Doping

Online: 12 January 2022 (13:30:19 CET)

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Preprint ARTICLE | doi:10.20944/preprints202007.0595.v2

Multi Criteria Decision Analysis Technique for Solar Power Sites Selection in Duhok Governorate – Iraq

Gaylan R. Faqe Ibrahim, Kamaran Wali Mahmood, Muhammad Mirza Mahmud

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Duhok Governorate; Solar Power; MCDA; AHP; Boolean

Online: 12 May 2021 (13:58:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0338.v1

Should A Good Organic Solar Cell Be A Good Organic LED?

Gregory Kozyreff, Blaise Godefroid

Subject: Physical Sciences, Applied Physics Keywords: organic solar cells; heterojunction; IQE; organic LED

Online: 15 August 2020 (05:21:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0128.v1

The Value of PV Power Forecast and the Paradox of the “Single Pricing” Scheme: The Italian Case Study

Marco Pierro, David Moser, Richard Perez, Cristina Cornaro

Subject: Engineering, Energy And Fuel Technology Keywords: photovoltaic power forecast; energy markets; solar imbalance

Online: 7 July 2020 (16:23:08 CEST)

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