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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/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/preprints202402.1306.v1

Validation of a 3D Local-Scale Adaptive Solar Radiation Model by Using Pyranometer Measurements and High-Resolution DEM

Eduardo Rodríguez, Judit García-Ferrero, Maria Sanchez-Aparicio, José Manuel Iglesias, Albert Oliver-Serra, María Jesus Santos Sánchez, Paula Andres-Anaya, José Manuel Cascón, GUSTAVO MONTERO, Alejandro Medina, Susana Lagüela, M.Isabel Asensio, Rafael Montenegro

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: Solar radiation; Complex orography; Shadow calculation; LiDAR data; High-resolution DEM; Adaptive mesh; Pyranometer measurement

Online: 4 March 2024 (07:09:50 CET)

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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 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/preprints201812.0164.v2

Radiation Effect Modeling for Controlling Heat Transfer in the Shape Memory Alloy

Amine Riad, Mouna Ben Zohra, Abdelilah Alhamany, Mohamed Mansouri

Subject: Engineering, Mechanical Engineering Keywords: Shape memory alloy; SMA; Smart material; Radiation effect; solar radiation effect; radiation heat

Online: 8 September 2022 (09:02:46 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 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 ARTICLE | doi:10.20944/preprints202111.0202.v1

Hybrid Machine Learning for Solar Radiation Prediction in Reduced Feature Spaces

Abdel-Rahman Hedar, Majid Almaraashi, Alaa E. Abdel-Hakim, Mahmoud Abdulrahim

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: solar energy; solar radiation prediction; hybrid machine learning; feature selection; feature extraction; classification algorithms; regression analysis; weather research and forecasting (WRF)

Online: 10 November 2021 (10:48:15 CET)

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Preprint REVIEW | doi:10.20944/preprints202312.0546.v1

Cultivation of Vitamin C-Rich Vegetables for Space Radiation Mitigation

Alireza Mortazavi, Helia Yarbaksh, B.F. Bahaaddini Baigy Zarandi, Reza Yarbakhsh, Fatemeh Ghadimi-Moghaddam, SMJ Mortazavi, Masoud Haghani, Donya Firoozi, Lembit Sihver

Subject: Physical Sciences, Radiation And Radiography Keywords: radiation, C-vitamin; solar particle event; SPE; antioxidants; radiation mitigator

Online: 7 December 2023 (19:55:54 CET)

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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 ARTICLE | doi:10.20944/preprints202404.0306.v1

Estimation of Pointing Errors of Large Radio Telescopes under Solar Radiation Based on Digital Twin

Shanxiang Wei, Deqing Kong, Binlan Wang, Lianbo Fu, Wenrong Xiao, Zongming Yin, Yongxiang Li, Zhouzhou Xiao

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: digital twin; radio telescope; pointing error; solar radiation

Online: 3 April 2024 (14:28:16 CEST)

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Preprint REVIEW | doi:10.20944/preprints202305.0232.v1

Technological Civilization and Health Impact Assessment of Non-Ionizing Radiation in Nigeria: Review

Emmanuel Ndoma, Nyakno George, Muyiwa Orosun, Ekong Nathaniel, Emmanuel Agbo, Golden Offorson

Subject: Physical Sciences, Biophysics Keywords: Non-Ionizing Radiation; Electromagnetic Radiation; Health; UV Solar radiation; Nigeria

Online: 4 May 2023 (08:20:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201806.0098.v1

Effect of Reflector Geometry in the Annual Received Radiation of Low Concentration Photovoltaic Systems

João Paulo N. Torres, Carlos A. F. Fernandes, João Gomes, Bonfiglio Luc, Carine Giovinazzo, Olle Olsson, P. J. Costa Branco

Subject: Engineering, Energy And Fuel Technology Keywords: C -PV solar systems, MaReCo, ray-tracing, reflector design, Soltrace.

Online: 6 June 2018 (14:15:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201708.0010.v1

Solar Radiation–The Estimation of the Optimum Tilt Angles for South-Facing Surfaces in Pristina

Xhevat Berisha, Arianit Zeqiri, Drilon Meha

Subject: Engineering, Mechanical Engineering Keywords: solar energy; gains; estimation; tilt angle; south-facing; surface; Pristina

Online: 3 August 2017 (10:51:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201909.0049.v1

Deriving Aerosol Absorption Properties from Solar Ultraviolet Radiation Spectral Measurements at Thessaloniki, Greece

Ilias Fountoulakis, Athanasios Natsis, Nikolaos Siomos, Theano Drosoglou, Alkiviadis F. Bais

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: solar UV radiation; aerosol absorption; SSA; AAOD; spectral measurements; aerosol optical properties

Online: 4 September 2019 (14:29:58 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 ARTICLE | doi:10.20944/preprints202406.1775.v1

On the Importance of Solar Radiation and Shading for the AAR Prediction of Concrete Arch Dams

Noemi Schclar Leitão

Subject: Engineering, Civil Engineering Keywords: Solar radiation; Shadow; Alkali-aggregate reaction; Concrete dams; Finite elements

Online: 25 June 2024 (15:13:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0363.v1

Quality Control of Solar Radiation Data within the South African Weather Service Solar Radiometric Network

Lucky Ntsangwane, Venkataraman Sivakumar, Brighton Mabasa, Nosipho Zwane, Katlego Ncongwane, Joel Botai

Subject: Physical Sciences, Applied Physics Keywords: quality control; BSRN; solar radiation; satellite-retrieve irradiance; ground stations; validation

Online: 21 August 2018 (04:23:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202202.0002.v1

15-Year Analysis of Direct Effects of Total and Dust Aerosols in Solar Radiation/Energy Over the Mediterranean Basin

Kyriakoula Papachristopoulou, Ilias Fountoulakis, Antonis Gkikas, Panagiotis G. Kosmopoulos, Panagiotis T. Nastos, Maria Hatzaki, Stelios Kazadzis

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: aerosols; dust; direct radiative effects; solar energy; Mediterranean basin

Online: 1 February 2022 (10:58:53 CET)

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Preprint TECHNICAL NOTE | doi:10.20944/preprints202007.0556.v1

Solar3D: A 3D Extension of GRASS GIS r.sun for Estimating Solar Radiation in Urban Environments

Jianming Liang, Jianhua Gong, Xiuping Xie, Jun Sun

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: Solar radiation; 3D city models; Urban environment; GRASS GIS r.sun; 3D extension

Online: 23 July 2020 (12:20:40 CEST)

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Preprint REVIEW | doi:10.20944/preprints202406.0128.v1

Solar Radiation Forecasting — State of Art and Methodological Discussion

Ewa Chodakowska, Joanicjusz Nazarko, Łukasz Nazarko, Hesham S. Rabayah

Subject: Engineering, Energy And Fuel Technology Keywords: forecasting; solar; energy; irradiance; photovoltaic; state of the art; systematic literature review (SLR); meta-review; overviews of review; bibliometric; classification; method

Online: 4 June 2024 (08:22:31 CEST)

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Effective solar forecasting has become a critical topic in the scholarly literature in recent years due to the rapid growth of photovoltaic energy production worldwide and the inherent variability of this source of energy. Due to the technological and econonomic limitations of energy storage solutions, using other, mosty conventional, sources to cover energy shortfalls and at the same time utilising solar surpluses production becomes necessary. The need to optimize energy systems, ensuring power continuity, and balancing energy supply and demand has led to the development of various forecasting methods and approaches based on meteorological data or photovoltaic plant characteristics. This article presents the results of a meta-review of the solar forecasting literature, including the current state of knowledge and methodological discussion. It presents a comprehensive set of forecasting methods, evaluates current classifications, and proposes a new synthetic typology. The article emphasizes the increasing role of artificial intelligence (AI) and machine learning (ML) techniques in improving forecast accuracy, alongside traditional statistical and physical models. It explores the challenges of hybrid and ensemble models, which combine multiple forecasting approaches to enhance performance. The paper addresses the emerging trends in solar forecasting research, such as the integration of big data and advanced computational tools. Additionally, from a methodological perspective, the article outlines a rigorous approach to the meta-review research procedure, addresses the scientific challenges associated with conducting bibliometric research, and highlights best practices and principles. This includes defining research questions, selecting eligibility criteria, literature search, data extraction, synthesis, and assessing bias and quality. The article contributes to the solar forecasting field by providing up-to-date knowledge, along with insights on the emerging trends, future research directions, and anticipating implications for the theory and practicce.

Preprint ARTICLE | doi:10.20944/preprints202407.2439.v1

Ensemble Learning Algorithms for Solar Radiation Prediction in Santo Domingo: Measurements and Evaluation

Francisco A. Ramírez-Rivera, Néstor F. Guerrero-Rodríguez

Subject: Engineering, Energy And Fuel Technology Keywords: ensemble learning; evaluation metrics; heterogeneous ensemble learning; homogeneous ensemble learning; hyperparameter; time horizon; solar radiation

Online: 30 July 2024 (13:47:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201807.0274.v1

The Non-Uniform and Asymmetric Thermal Radiation upon the Human Physiological Responses in Outdoor Environment

Yoshihito Kurazumi, Kenta Fukagawa, Tomonori Sakoi, Ariya Aruninta, Ken Yamashita

Subject: Biology And Life Sciences, Anatomy And Physiology Keywords: asymmetry; mean skin temperature; non-uniform; outdoor environment; physiological response; skin temperature; solar radiation

Online: 16 July 2018 (10:46:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202101.0545.v3

Evaluation of High-Resolution Satellite-Derived Solar Radiation Data for PV Performance Simulation in East Africa

Diane Palmer, Richard Blanchard

Subject: Engineering, Energy And Fuel Technology Keywords: Solar radiation; Satellite-derived irradiance; Global Horizontal Irradiance; Clear sky model; ground stations; validation

Online: 18 March 2021 (14:30:42 CET)

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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/preprints202310.0608.v1

Effect of the Ground Albedo on the Estimation of Solar Radiation on Tilted Flat-Plate Surfaces: The Case of Saudi Arabia

Ashraf M. Farahat, Harry D. Kambezidis, Styliani I. Kampezidou

Subject: Engineering, Energy And Fuel Technology Keywords: ground albedo; surface-reflected radiation; solar radiation on tilted surfaces; Saudi Arabia

Online: 10 October 2023 (12:18:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202301.0112.v1

Machine Learning Models for Approximating Downward Short-wave Radiation Flux over the Ocean from All-sky Optical Imagery based on DASIO Dataset

Mikhail A. Krinitskiy, Vasilisa S. Koshkina, Mikhail A. Borisov, Nikita N. Anikin, Sergey K. Gulev, Maria Artemeva

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: downward solar radiation; clouds; machine learning; deep learning; convolutional neural networks; ResNet; all-sky imagery; Random Forests; Gradient Boosting

Online: 6 January 2023 (03:16:14 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.2004.v1

System Dynamics Model of Decentralized Household Electricity Storage Implementation. Case Study of Latvia

Armands Gravelsins, Erlanda Atvare, Edgars Kudurs, Anna Kubule, Dagnija Blumberga

Subject: Engineering, Energy And Fuel Technology Keywords: battery energy storage; energy management; household consumption; solar panels; system dynamics

Online: 30 August 2023 (08:18:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0690.v1

Theoretical and Simulation Analysis of a Thin Film Temperature Sensor Error Model for In-Situ Detection in Near Space

Guoyan Wang, Chun Hu, Fei Cui, Xiaojun Yang, Dezhi Zheng

Subject: Engineering, Electrical And Electronic Engineering Keywords: near space; Joule heat; solar radiation; aerodynamic; temperature correction

Online: 21 April 2023 (08:32:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.1769.v1

Cloud Characteristics and Their Effects on Solar Irradiance According to the ICON Model, CLOUDNET and BSRN Observations

Julia Shuvalova, Natalia Chubarova, Marina Shatunova

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: cloud condensation nuclei; solar irradiance; ICON model; CLOUDNET; MODIS; BSRN

Online: 27 October 2023 (10:35:56 CEST)

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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/preprints202104.0663.v1

Everything Is A Circle: A New Universal Orbital Model

AslıPınar Tan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Solar System, Planetary System, Planet, Satellite, Sun, Earth, Moon, Topology, Circle, Ellipse, Orbit, Trajectory, Orbital Mechanics

Online: 26 April 2021 (12:14:51 CEST)

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Based on measured astronomical position data of heavenly objects in the Solar System and other planetary systems, all bodies in space seem to move in some kind of elliptical motion with respect to each other. According to Kepler’s 1^st Law, “orbit of a planet with respect to the Sun is an ellipse, with the Sun at one of the two foci.” Orbit of the Moon with respect to Earth is also distinctly elliptical, but this ellipse has a varying eccentricity as the Moon comes closer to and goes farther away from the Earth in a harmonic style along a full cycle of this ellipse. In this paper, our research results are summarized, where it is first mathematically shown that the “distance between points around any two different circles in three dimensional space” is equivalent to the “distance of points around a vector ellipse to another fixed or moving point, as in two dimensional space”. What is done is equivalent to showing that bodies moving on two different circular orbits in space vector wise behave as if moving on an elliptical path with respect to each other, and virtually seeing each other as positioned at an instantaneously stationary point in space on their relative ecliptic plane, whether they are moving with the same angular velocity, or different but fixed angular velocities, or even with different and changing angular velocities with respect to their own centers of revolution. This mathematical revelation has the potential to lead to far reaching discoveries in physics, enabling more insight into forces of nature, with a formulation of a new fundamental model regarding the motions of bodies in the Universe, including the Sun, Planets, and Satellites in the Solar System and elsewhere, as well as at particle and subatomic level. Based on the demonstrated mathematical analysis, as they exhibit almost fixed elliptic orbits relative to one another over time, the assertion is made that the Sun, the Earth, and the Moon must each be revolving in their individual circular orbits of revolution in space. With this expectation, individual orbital parameters of the Sun, the Earth, and the Moon are calculated based on observed Earth to Sun and Earth to Moon distance data, also using analytical methods developed as part of this research to an approximation. This calculation and analysis process have revealed additional results aligned with observation, and this also supports our assertion that the Sun, the Earth, and the Moon must actually be revolving in individual circular orbits.

Preprint ARTICLE | doi:10.20944/preprints202401.0349.v1

Microgrid Model for Evaluating the Operational Dynamics of Solar-Powered Hydrogen Production

Mohammed Gmal Osman, Cristian-Valentin Strejoiu, Cornel Panait, Catalina Alexandra Sima, Gheorghe Lazaroiu

Subject: Engineering, Energy And Fuel Technology Keywords: Hydrogen Technology; Hydrogen Production; Biomass; Solar; Geothermal; Carbon emissions; re-newable energy; efficiency; sustainability

Online: 4 January 2024 (07:29:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202003.0028.v2

The Outdoor Field Test and Energy Yield Model of the Four-terminal on Si Tandem PV Module

Kenji Araki, Hiroki Tawa, Hiromu Saiki, Yasuyuki Ota, Kensuke Nishioka, Masafumi Yamaguchi

Subject: Engineering, Energy And Fuel Technology Keywords: photovoltaic; solar spectrum; tandem cell; energy yield model; on-Si tandem; terminal

Online: 30 March 2020 (08:23:32 CEST)

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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/preprints202406.1773.v1

Solar Irradiance Prediction Method for PV Power Supply System of Mobile Sprinkler Machine using WAO-XGBoost Model

Dan Li, Jiwei Qu, Delan Zhu, Zheyu Qin, Qiansu Zhang

Subject: Engineering, Mechanical Engineering Keywords: agricultural irrigation; mobile sprinkler machine; solar power generation; irradiance; machine learning; prediction model

Online: 25 June 2024 (16:26:51 CEST)

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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 ARTICLE | doi:10.20944/preprints201809.0089.v1

Forecast Horizon and Solar Variability Influences on the Performances of Multiscale Hybrid Forecast Model (MHFM)

Stéphanie Monjoly, Rudy Calif, Maina André, Ted Soubdhan

Subject: Engineering, Energy And Fuel Technology Keywords: hybrid forecast model; forecast horizon; daily global solar radiation clustering; fuzzy c-means; variability characterization

Online: 5 September 2018 (06:22:35 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 ARTICLE | doi:10.20944/preprints202012.0750.v1

A Thermal-Hydraulic Model for the Stagnation of Solar Thermal Systems with Flat-Plate Collector Arrays

Ralph Eismann, Sebastian Hummel, Federico Giovannetti

Subject: Engineering, Energy And Fuel Technology Keywords: Solar thermal; flat-plate collector; stagnation; steam range; two-phase mixture model; thermal-hydraulic model.

Online: 30 December 2020 (10:02:25 CET)

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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/preprints202305.1729.v1

Optimization of Electron and Hole Transport Layer to Model A Lead-Free Inorganic Cs₃Bi₂I₉Based Perovskite Solar Cell and Investigating the Effects of Different Attributes on Device Performance

Arnob Das, Sujan Banik, Barun K. Das, Nurul Islam

Subject: Engineering, Mechanical Engineering Keywords: Perovskite solar cell; Lead-free Cs3Bi2I9; HTL; ETL; Fill factor; PCE

Online: 25 May 2023 (03:47:38 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 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/preprints202311.1968.v1

Redispatch Model for Real Time Operation with High Solar-Wind Penetration and its Adaptation to the Ancillary Services Market

Kristian Balzer, David Watts

Subject: Engineering, Energy And Fuel Technology Keywords: ancillary service; economic merit list; redispatch; real time operation; renewable generation; solar-wind generation; unit commitment

Online: 30 November 2023 (10:12:14 CET)

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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/preprints202311.1538.v1

Short-Term Solar Irradiance Prediction with a Hybrid Ensemble Model using EUMETSAT Satellite Images

Jayesh Thaker, Robert Höller, Mufaddal Kapasi

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: PV power forecasting; deterministic forecast; machine learning; deep learning; satellite forecast, ensemble models; solar; clear sky index; short-term forecast; NWP

Online: 23 November 2023 (13:39:39 CET)

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Accurate short-term solar irradiance forecasting is crucial for the efficient operation of solar energy driven photovoltaic (PV) power plants. In this research, we introduce a novel hybrid ensemble forecasting model that amalgamates the strengths of machine learning tree-based models and deep learning neuron-based models. The hybrid ensemble model integrates the interpretability of tree-based models with the capacity of neuron-based models to capture complex temporal dependencies within solar irradiance data. Furthermore, stacking and voting ensemble strategies are employed to harness the collective strengths of these models, significantly enhancing prediction accuracy. This integrated methodology is enhanced by incorporating pixels from satellite images provided by the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT). These pixels are converted into structured data arrays and employed as exogenous inputs in the algorithm. The primary objective of this study is to improve the accuracy of short-term solar irradiance predictions, spanning a forecast horizon up to 6 hours ahead. The incorporation of EUMETSAT satellite image pixels data enables the model to extract valuable spatial and temporal information, thus enhancing the overall forecasting precision. This research also includes detailed analysis of the derivation of GHI using satellite images. The study was carried out and the models tested across three distinct locations in Austria. A detailed comparative analysis was carried out for traditional Satellite (SAT) and Numerical Weather Prediction (NWP) models with hybrid models. Our findings demonstrate a higher skill score for all of the approaches compared to smart persistent model and consistently highlight the superiority of the hybrid ensemble model for short-term prediction window of 1 to 6 hours. This research underscores the potential for enhanced accuracy of the hybrid approach to advance short-term solar irradiance forecasting, emphasizing its effectiveness at understanding the intricate interplay of the meteorological variables affecting solar energy generation worldwide. The results of this investigation carry noteworthy implications for advancing solar energy systems, thereby supporting the sustainable integration of renewable energy sources into the electrical grid.

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/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 ARTICLE | doi:10.20944/preprints202406.2037.v1

Research on Multi-Step Fruit Color Prediction Model of Tomato in Solar Greenhouse Based on Time Series Data

Shufeng Liu, Yanping Zhao, Tianhua Li, Linlu Zu, Siyuan Chang

Subject: Engineering, Electrical And Electronic Engineering Keywords: ; solar greenhouse; internet of things; tomato growth model; deep learning; multi-step space-time prediction ;

Online: 1 July 2024 (04:02:41 CEST)

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Color change is the most obvious characteristic of tomato ripening stage and an important indicator of tomato ripening condition, which directly affects the commodity value of tomato. To visualize the color change of tomato fruit in mature stage, a gated recurrent unit network with an encoder-decoder structure that dynamically simulates tomato growth and development with time-dependent lines using tomato color and shape as real-time data was proposed in this paper. Firstly, the .json file was converted into a mask.png file, the tomato mask was extracted, and the tomato was separated from the complex background environment, and the tomato growth and development data set was successfully constructed. Then, a network of gated recurrent units with encoder-decoder structure was constructed to predict the future growth trend of tomato under different greenhouse temperatures. The experimental results showed that for the gated recurrent unit network of encoder-decoder structure proposed, when the hidden layer number was 1 and hidden layer number was 512, a high consistency and similarity between the model predicted image sequence and the actual growth and development image sequence would be realized, and the structural similarity index measure was 0.746. It was proved that when the average temperature was 24.93℃, the average soil temperature was 24.06℃, and the average light intensity was 11.26 Klux, the environment was the most suitable for tomato growth. The environmental data-driven tomato growth model was constructed to explore the growth status of tomato under different environmental conditions, thus to understand the growth status of tomato in time. The statement provided a theoretical foundation for determining the optimal greenhouse environmental conditions to achieve tomato maturity. And it offered recommendations for investigating the growth cycle of tomatoes, as well as technical assistance for standardized cultivation in solar greenhouses.

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 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 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/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/preprints202409.1700.v1

Ionospheric Absorption Variation Based on Ionosonde and Riometer Data and the NOAA D-RAP Model over Europe During Intense Solar Flares in September, 2017

Veronika Barta, Tamás Bozóki, Dávid Péter Süle, Daniel Kouba, Jens Mielich, Tero Raita, Attila Buzás

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: space weather; solar flare; ionosphere; ionospheric absorption; ionosonde data; HF radio wave absorption; radio fade-out; riometer; D-RAP model

Online: 23 September 2024 (12:16:33 CEST)

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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/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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