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Showing posts from September, 2024

Design and development of a biomimetic solar tree for sustainable cogeneration: an energy and exergy assessment

HIGHLIGHTS What: Firstlaw analysis and second-law analysis were carried out to determine exergy losses during the photovoltaic conversion process of solar trees. The aims of this study are: a) To design and develop a portable solar tree, assess the thermodynamic performance based on heat transfer, and identify exergy losses. b) To suggest various methods to enhance the efficiency of solar trees. This investigation focuses on the thermodynamic efficiency of a large-scale photovoltaic (PV) system, explicitly emphasizing the analysis of thermal losses and electrical output exclusively from the PV array. Who: Mohanaravi Kumaresen et al. from the Centre for Research in Advanced Fluid and Process, University Malaysia Pahang Al-Sultan have published the article: Design and Development of a Biomimetic Solar Tree for Sustainable Cogeneration: An Energy and Exergy Assessment, in the Journal: (JOURNAL) Future: Future work can benefit from the strategy outlined in this research. Futur...

Photovoltaic power injection control based on a virtual synchronous machine strategy

HIGHLIGHTS What: In this paper a photovoltaic injection system is designed with a virtual synchronous machine control strategy to provide voltage and frequency support to the grid. Unlike the work mentioned above, it is intended to apply frequency support without considering a constant DC source or energy storage as batteries. Who: Miguel Albornoz and colleagues from the Department of Electrical Engineering, Universidad de Concepción, Concepción, Chile have published the paper: Photovoltaic Power Injection Control Based on a Virtual Synchronous Machine Strategy, in the Journal: Sensors 2024, 24, 4039. of /2024/ How: The results showed that the static synchronous compensator (STATCOM) is one of the best devices for compensating voltage and improving the power capacity of a transmission line. In the simulations of a grid and a synchronverter with a PV array as the DC source were studied and the results showed that the PV power injection was enhanced using the synchronverter....

Research on short-term photovoltaic power generation forecasting model based on multi-strategy improved squirrel search algorithm and support vector machine

HIGHLIGHTS What: At the same time, after analyzing its principle and optimization process, in this paper, a strategic method to improve the shortcomings of SSA is proposed. For the effectiveness of the experiment, two typical data sets were used from the months of June and December. | Vol:.(1234567890) 14:14348 | The prediction results of the other four models are poor and there is a certain gap between the curve fitting and the prediction results of the model proposed in this paper. Who: Ruijin Zhu from the (UNIVERSITY) have published the Article: Research on short-term photovoltaic power generation forecasting model based on multi-strategy improved squirrel search algorithm and support vector machine, in the Journal: Scientific Reports Scientific Reports of 11/01/2024 How: Based on the sigmoid function this paper proposes a | Vol.(1234567890) 1414348 | f (x)=1 + e-x Chaotic based dynamic opposition‑based learning Aiming at the squirrel population iteration`s tendency to ...

Reactive dc sputtered tio2 electron transport layers for cadmium‐free sb2se3 solar cells

HIGHLIGHTS What: These previous reports, along with the present study, suggest the barrier to electron transport can be mediated by optimized TiO2 processing, provided sufficiently high electron conductivities and low interfacial defect densities can be obtained. The authors report a simple, scalable, reproducible method of preparing highly crystalline wide bandgap anataseTiO2 thin films for application as the ETL in Sb2 Se3 solar cells. Who: Christopher H. Don and colleagues from the JE. N. Swallow Department of Materials University of Oxford Parks Road, Oxford , PH, UK L. Bowen Department of Physics University of Durham Durham , LE, UK D. F. Fernandes, T. Kubart Department of Electrical Engineering Division of Solid-State Electronics The Ångström Laboratory Uppsala University , Uppsala, Sweden D. Biswas, P. K. Thakur, T.-L. Lee Diamond Light Source Ltd, Diamond House Harwell Science and Innovation Campus Didcot, Oxfordshire , DE, UK have published the research: Reactive DC...

Self-filtering based on the fault ride-through technique using a robust model predictive control for wind turbine rotor current

HIGHLIGHTS What: This strategy works on fault mode which depends on fault ride-through technology, with the primary goal of protecting the WF from external influences stemming from the electrical grid (voltage drop).. The aim of this research is to introduce a novel model designed to mitigate electrical grid distortions arising from nonlinear loads, which, in turn, lead to mechanical fatigue in electric generators. The aim involves transmitting the Ps and Qs reference values to each WT. Validation and discussion This section of the research paper serves to confirm the validity and efficiency of the designed management technique. Who: Abdelkader Achar from the Department Liabes University, Istanbul, Turkey have published the research work: Self-filtering based on the fault ride-through technique using a robust model predictive control for wind turbine rotor current, in the Journal: Scientific Reports Scientific Reports How: This paper introduces a management and control app...

Feasibility and performance analysis of utilizing spent mushroom substrate as biomass fuel

HIGHLIGHTS What: This study investigated the effect of evaporation temperature and pre-drying moisture content on system performance. Who: Liao Chen-hao and Hsieh Jui-Ching from the National Chin-Yi University of Technology, Department of Mechanical Engineering, Taichung City, Taiwan have published the paper: Feasibility and performance analysis of utilizing spent mushroom substrate as biomass fuel, in the Journal: (JOURNAL) SUMMARY As global finite fossil fuel resources are gradually depleting, the development and research of biomass energy present a solution to mitigate the impacts of climate change. Typically, SMS has a high moisture content, making the process of drying for biomass fuel energy-intensive. The efficiency correlation is as outlined below: 𝜂𝑡ℎ= 𝑊𝑒𝑙𝑒 +𝑄𝑝𝑟𝑒𝑑𝑟𝑦 +𝑄𝑑𝑟𝑦𝑒𝑟 -𝑊𝑓𝑎𝑛 𝑄𝑏𝑜𝑙𝑖𝑒𝑟 where 𝜂𝑡ℎ represents the biomass system thermal efficiency, 𝑊𝑒𝑙𝑒 is the system`s electrical output power, 𝑄𝑑𝑟𝑦𝑒𝑟 is the drying heat, 𝑄...

Positive effects of physical activity on insulin signaling

HIGHLIGHTS What: A meta-analysis was conducted to evaluate the efficacy of structured exercise intervention programs for insulin resistance in T2DM. Who: Paulina Małkowska from the Institute of Physical Culture Sciences, University of Szczecin, Szczecin, Poland have published the article: Positive Effects of Physical Activity on Insulin Signaling, in the Journal: (JOURNAL) SUMMARY Typically, insulin facilitates the uptake of carbohydrates in vital locations for storage and utilization, like adipose_tissue and skeletal muscle, where they are converted into lipids alongside proteins. In white adipose_tissue (WAT), insulin suppresses lipolysis while promoting glucose transport and lipogenesis. In adiposetotissue, insulin and resistance lipolysis acids intoand the protein bloodstream, which contributes dyslipidemia ectopicpromotes fat deposition (breakdown of fats), leading to increased release of free is fatty_acids intowith the bloodstream, in non-adipose_tissues. Insulin ...

Study of the location for the installation of a photovoltaic plant for the generation of electric power in puerto rico

HIGHLIGHTS What: As a result of this study a plot of land spanning 131.56 hectares in the Juana Díaz sector 1.59 kilometers from the electrical interconnected system was identified as a suitable location impacting only five easements. OBJ Model: This model provides three-dimensional (3D) terrain information through the Autodesk Online viewer. Who: Luffi from the Universidad Simón Bolívar have published the Article: Athenea Journal Vol.5, Issue 15, (pp. 16-28), in the Journal: (JOURNAL) of August/24,/2020 How: B. Case Study Puerto Rico`s Renewable Energy Ambitions This paper presents a case study examining Puerto Rico`s ambitious plans for renewable energy integration. SUMMARY Maldonado L et_al Study of the location for the installation of a photovoltaic plant for the generation of electric power in Puerto Rico Athenea Journal Vol. The paper is structured into the following sections: Introduction, the 30 MW Generation Project for 25 Years, Management of the Photovoltaic...

Global maximum power point tracking of photovoltaic module arrays based on an improved intelligent bat algorithm

HIGHLIGHTS What: In this paper, two types of improved bat algorithms (IBA) are proposed. In this paper, MATLAB/Simulink was utilized to build the MPPT system for a PVMA, so the tracking results of the MPPT method proposed could be simulated. Who: Kuei-Hsiang Chao and Thi Thanh Truc Bau from the Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung, Taiwan have published the research work: Global Maximum Power Point Tracking of Photovoltaic Module Arrays Based on an Improved Intelligent Bat Algorithm, in the Journal: Electronics 2024, 1207 of /2024/ How: In this paper a method based on an improved intelligent bat algorithm (IIBA) in cooperation with a voltage and current sensor was applied in maximum power point tracking (MPPT) for a photovoltaic module array (PVMA) where the power generation performance of a PVMA was enhanced. In light of this in this study traditional bat algorithms are applied to the photovoltaic array to carry out max...

Magnet-free electromagnetic nonreciprocity in two-dimensional materials

HIGHLIGHTS What: To this purpose, the authors provide a general conductivity model to describe gyrotropic metasurfaces that exhibit nonreciprocity through different physical mechanisms enabled by 2D materials, including optical pumping, drifting electrons, ferromagnetic monolayers, mechanical strain, and spatiotemporal modulation. Even though this approach has been demonstrated from microwaves43 to optical frequencies41 and leads to high isolation levels, it usually operates with high intensity signals and requires excitation from only one port at a time. This approach is intensity-independent and provides great design flexibility, as it can be implemented with varactors or switches at microwave and millimeter wave frequencies,48,51,54,58 modulating the properties of optical materials,50 or through mechanical modes.53 A large number of nonreciprocal devices has been demonstrated based on spatiotemporal modulation, ranging from RF circulators and isolators48,51,58,65,68,69 to f...

India`s commitment to hydrogen: strategic initiatives and goals for climate change mitigation

HIGHLIGHTS What: As a part of these endeavours the GOI has launched the National Hydrogen Energy Mission with the primary goal of creating a comprehensive roadmap for hydrogen production storage and utilization. By exploring these dimensions the authors aim to provide a comprehensive understanding of how Green Hydrogen can drive India`s transition to a sustainable and resilient future. Lower Electrolyser system costs are anticipated to be the main focus for cost reduction efforts through 2030. Who: Madhubanti Dutta from the (IAR), Gandhinagar, Gujarat, India have published the Article: International Journal for Multidisciplinary Research (IJFMR), in the Journal: (JOURNAL) Future: It provides a baseline for comparison with future projections. SUMMARY The Institute of Advanced Research (IAR), Gandhinagar, Gujarat, India IJFMR240425204 Volume 6, Issue 4, July-August 2024 by 2070, the authors recognise the critical role of Green Hydrogen. India, with its vast renewable ene...