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Assessment of the locational potential of floating offshore wind energy in South Africa Renewables Pub Date : 2024-04-03 Kubiat Umoh, Abbas Hasan, Amangeldi Kenjegaliev, Ayman Al-Qattan
Expanding floating wind into new markets could support emission reduction targets in several national contexts. It furthers the need for adequate assessments to gain a full understanding of the technology’s potential in future markets. South Africa is a prime case study as it has seen limited industry and policy developments despite its huge technical potential for floating offshore wind (FOW). This
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Investigating the role of subsistence renewables in alleviating power poverty within Nigeria’s energy-mix strategy Renewables Pub Date : 2024-04-01 David Oluseun Olayungbo, Ayodele Adekunle Faiyetole, Adenike Anike Olayungbo
Nigeria, a country rich in renewable sources still heavily relies on nonrenewable energy, of which the government’s on-grid supply remains inadequate, and generally of poor services. This study, therefore, investigated subsistence renewables by citizens able to contribute to the country’s energy-mix plan and help ameliorate power poverty challenges. Qualitative primary data were sourced using the Delphi
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Modeling, design and optimization of integrated renewable energy systems for electrification in remote communities Renewables Pub Date : 2024-03-12 Kuanrong Qiu, Evgueniy Entchev
Integrated renewable energy systems are becoming a promising option for electrification in remote communities. Integrating multiple renewable energy sources allows the communities to counteract the weaknesses of one renewable energy source with the strengths of another. This study aims to model, design and optimize integrated renewable energy systems consisting of solar photovoltaic (PV) panels, wind
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Advances in CO2 circulation hydrogen carriers and catalytic processes Renewables Pub Date : 2024-02-24 Seo Ono, Dines Chandra Santra, Ryoichi Kanega, Hajime Kawanami
Hydrogen serves as a renewable, clean energy carrier, and the critical development of technologies for safer and simpler storage and transportation is imperative for addressing global warming. There is also a growing demand for efforts to capture and utilize CO2 to tackle similar issues. Consequently, considerable attention has been drawn to carriers that chemically store hydrogen. Hydrogen can be
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Exploring the potential role of decentralised biogas plants in meeting energy needs in sub-Saharan African countries: a techno-economic systems analysis Renewables Pub Date : 2024-02-16 Thomas Robin, Ehiaze Ehimen
To achieve the Sustainable Development Goals by 2030, low-income sub-Saharan African countries urgently need to electrify. Biogas production from anaerobic digestion could make a contribution to a solution to improved electricity generation and access in these regions. This study evaluates its feasibility using Malawi as a case study. The aim is to provide households with a continuous supply of gas
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Balancing short-term costs and long-term benefits: an analysis of the impact of hydroelectric power generation on electricity prices volatility in Cameroon Renewables Pub Date : 2024-02-05 Etienne Bienvenu Akono, Vatis Christian Kemezang
This study examines the short- and long-term impacts of various factors on the volatility and price of electricity in Cameroon, including hydroelectric power generation, economic growth, energy demand, and exchange rates from 2000 to 2019. The study uses an autoregressive distributed lag model. The study found that increasing hydroelectric power generation has both positive and negative impacts on
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Examining the influence of thermal effects on solar cells: a comprehensive review Renewables Pub Date : 2024-02-04 Lina M. Shaker, Ahmed A. Al-Amiery, Mahdi M. Hanoon, Waleed K. Al-Azzawi, Abdul Amir H. Kadhum
Solar energy has emerged as a pivotal player in the transition towards sustainable and renewable power sources. However, the efficiency and longevity of solar cells, the cornerstone of harnessing this abundant energy source, are intrinsically linked to their operating temperatures. This comprehensive review delves into the intricate relationship between thermal effects and solar cell performance, elucidating
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Wind speed prediction for site selection and reliable operation of wind power plants in coastal regions using machine learning algorithm variants Renewables Pub Date : 2024-02-01 Tajrian Mollick, Galib Hashmi, Saifur Rahman Sabuj
The challenge of predicting wind speeds to facilitate site selection and the consistent operation of wind power plants in coastal regions is a global concern. The output of wind turbines is subject to fluctuations corresponding to changes in wind speed. The unpredictable characteristics of wind patterns introduce vulnerabilities to wind power facilities in wind power plants. To address this unpredictability
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Extreme weather events on energy systems: a comprehensive review on impacts, mitigation, and adaptation measures Renewables Pub Date : 2024-01-16 Ana C. R. Gonçalves, Xurxo Costoya, Raquel Nieto, Margarida L. R. Liberato
Energy systems (ES) are seriously affected by climate variability since energy demand and supply are dependent on atmospheric conditions at several time scales and by the impact of severe extreme weather events (EWEs). EWEs affect ES and can cause partial or total blackouts due to energy supply disruptions. These events significantly impact essential infrastructures and are considered one of the main
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Experimental analysis on the effects of trace metals as micronutrients in enhancing biomethane production Renewables Pub Date : 2024-01-11 C. Tintu Mary, K. Swarnalatha, S. J. Harishma
Anaerobic digestion (AD) of microbial biomass has proven to be a significant breakthrough technique in producing biogas rich in methane. The quantity of biogas obtained by anaerobic digestion processes varies significantly based on the nature and characteristics of the substrates used. This research work focuses on the use of trace metals such as Fe, Cu, Zn, Mn, Mg, Ni in proper proportions to enhance
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Analysis of solar energy potentials of five selected south-east cities in nigeria using deep learning algorithms Renewables Pub Date : 2024-01-05 Samuel Ikemba, Kim Song-hyun, Temiloluwa O Scott, Daniel R. E. Ewim, Sogo M. Abolarin, Akeeb Adepoju Fawole
This study presents a meticulous examination of the solar energy potential of five selected metropolitan cities (Abakaliki, Awka, Enugu, Owerri, and Umuahia) in Eastern part of Nigeria using deep learning algorithm, specifically the Long Short-Term Memory (LSTM) model. These cities, despite being characterized by extended rainy seasons and a high level of cloudiness, are suitable environment for solar
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Noble MXene nanofluids' impact on solar collector effectiveness enhancement: a CFD numerical evaluation Renewables Pub Date : 2024-01-04 Kaniz Farhana, Abu Shadate Faisal Mahamude, Kumaran Kadirgama, Rajan Jose
The thermal flat plate solar collector (FPSC) is a versatile solar harvesting system that may be integrated into various designs and base fluids. This study presents a novel investigation of using nanofluids to transfer thermal energy in an FPSC system. Using the governing equations in CFD simulations, the performance of an FPSC is studied numerically. The base fluid has been defined as a 60:40 blend
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Selection process of photovoltaic standalone pumping systems Renewables Pub Date : 2023-12-21 Fathy A. Syam, Osama M. Arafa
The application of a standalone photovoltaic (PV) system for water pumping has increased nowadays in remote areas of developing countries due to proven economic feasibility compared to other traditional alternatives. Pump–motor set manufacturers always give the pump characteristic at the motor's nominal speed. The traditional selection process of pumps depends simply on selecting a pump with the highest
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Predicting future global temperature and greenhouse gas emissions via LSTM model Renewables Pub Date : 2023-12-15 Ahmad Hamdan, Ahmed Al-Salaymeh, Issah M. AlHamad, Samuel Ikemba, Daniel Raphael Ejike Ewim
This work is executed to predict the variation in global temperature and greenhouse gas (GHG) emissions resulting from climate change and global warming, taking into consideration the natural climate cycle. A mathematical model was developed using a Recurrent Neural Network (RNN) with Long–Short-Term Memory (LSTM) model. Data sets of global temperature were collected from 800,000 BC to 1950 AD from
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Cost-benefit Analysis and Financial Viability of Household Biogas Plant Investment in South Ethiopia Renewables Pub Date : 2023-12-15 Tale Geddafa, Yoseph Melka, Getachew Sime
This study investigates the cost–benefit analysis and financial viability of biogas plant investment in South Ethiopia. A multi-stage sampling technique was employed to select sample households. A total of 105 adopter households were selected for household survey using a purposive sampling technique. All the households adopting biogas technology were considered. Besides, a biogas plant with 6 m3 and
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Comparison of the sensitivities and accuracies of optoelectronic transducers for solar irradiance measurement Renewables Pub Date : 2023-12-05 Olubunmi O. Onatoyinbo, Alexander A. Willoughby, Ayodele O. Soge, Oluropo F. Dairo
This paper compares the sensitivities and accuracies of four different optoelectronic transducers in measuring solar irradiance for the fabrication of portable and low-cost pyranometers. Trans-impedance conditioning circuits were designed for two phototransistors (BP103 and SFH3310) and two photodiodes (BPW21 and BPW34). The Arduino Mega 2560 was used as an interface between the analogue signal produced
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The effects of saline water preheating and heat recovery in a vapour-based multistage solar still Renewables Pub Date : 2023-11-24 Mfanafuthi Mthandeni Mkhize, Velaphi Msomi
The current study complements a broader body of research on solar distillation, including research on heat recycling capabilities and other related factors in multistage solar distillation systems. Solar stills can be used in various applications to provide safe and clean water from natural sources. This study is based on field data collected, analysed, and interpreted over ten (10) months. The solar
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A game theoretic approach to contract-based enviro-economic coordination of wood pellet supply chains for bioenergy production Renewables Pub Date : 2023-11-21 Zahra Vazifeh, Fereshteh Mafakheri, Chunjiang An, Farid Bensebaa
Wood pellets have gained global attention due to their economic availability and increasing demand for bioenergy as part of sustainable energy solutions. Management of the wood pellet supply chains, from feedstock harvesting to bioenergy conversion, is critical to ensure competitiveness in the energy markets. In this regard, wood pellets supply chain coordination can play a strategic role in enhancing
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The asymmetric effect of oil price on ecological footprint: evidence from oil-producing African countries Renewables Pub Date : 2023-11-21 Adewale Samuel Hassan, David Mhlanga
This study investigates the asymmetric impact of oil price (OP) on the ecological footprint (EF) in the major oil-producing African countries over the period 1988–2018. Results from the dynamic seemingly unrelated regression (DSUR) and the countrywise FMOLS regressions establish the asymmetric impact of OP on EF in the countries. Both GDP per capita and non-renewable energy (NRE) consumption are also
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Safety design study for energy harvesters Renewables Pub Date : 2023-10-26 Oleg Gaidai, Vladimir Yakimov, Fang Wang, Yihan Xing, Fuxi Zhang
Modern offshore and onshore green energy engineering includes energy harvesting—as a result, extensive experimental investigations, as well as safety and reliability analysis are crucial for design and engineering. For this study, several wind-tunnel experiments under realistic in situ wind speed conditions have been conducted to examine the performance of galloping energy harvester. Next, a novel
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Optimal energy scheduling method for the North Cameroonian interconnected grid in response to load shedding Renewables Pub Date : 2023-09-15 Bello-Pierre Ngoussandou, Nicodem Nisso, Dieudonné Kaoga Kidmo, E. Sreelatha, Yosef Berhan Jember, Sima Das, Kitmo
Renewable energy sources like sun and wind are intermittent, hence a hybrid system incorporating them is necessary. However, certain systems are more cost-effective and efficient than others, and they are not only more expensive but also far more harmful to the environment. To make up for the energy shortage in unconnected remote regions and urban areas with linked networks, renewable energies offer
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Large-scale energy storage system: safety and risk assessment Renewables Pub Date : 2023-09-05 Ernest Hiong Yew Moa, Yun Ii Go
The International Renewable Energy Agency predicts that with current national policies, targets and energy plans, global renewable energy shares are expected to reach 36% and 3400 GWh of stationary energy storage by 2050. However, IRENA Energy Transformation Scenario forecasts that these targets should be at 61% and 9000 GWh to achieve net zero carbon emissions by 2050 and limit the global temperature
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Commissioning and optimal load dispatch for supplying base and peak loads from Satellite Solar Power Station (SSPS) Using Microwave Wireless Power Transfer (MWPT) Renewables Pub Date : 2023-08-31 Prasad Rathod, Abdullah Al Mahamud, Utkarsh Talele
Solar power on Earth is characterized by its intermittent nature, limiting its practical application to peak loads only. However, this limitation can be overcome by implementing a concept known as Satellite Solar Power Station (SSPS), which involves deploying solar panels in space. Nevertheless, this approach poses various challenges that need to be addressed. One of the primary obstacles lies in determining
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Large-scale solar system design, optimal sizing and techno-economic-environmental assessment Renewables Pub Date : 2023-08-18 Hashwini Lalchand Thadani, Yun Ii Go
Malaysia targets to achieve an energy mix that is inclusive of at least 20% of renewable energies by the year 2025. Large-scale solar photovoltaic system (LSS-PV) emerged as the most preferable choice in Malaysia. Energy Commission (EC) Malaysia has launched competitive bidding on LSS since 2016 with a capacity of 500 MW in Peninsular Malaysia and targets to add the solar capacity in Peninsula Malaysia
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Decarbonization of the electricity generation sector and its effects on sustainability goals Renewables Pub Date : 2023-08-02 Efstathios E. Michaelides
The substitution of fossil fuels, especially coal, with renewable energy is a crucial step for the CO2 emissions reduction and the avoidance of Global Climate Change. The electric power generation industry is the first economic sector that will have to transition to renewable energy. However, wind and solar energy, the two most abundant renewable energy forms, are not dispatchable. The high penetration
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Design considerations for developing geothermal-assisted milk pasteurization equipment Renewables Pub Date : 2023-07-04 Namrata Bist, Parth Vaghela, Tanisha Kumar, Vaishnavi Pandey, Dharmesh Morabiya, Sourav Santara, Rohit Pawar, Roshni Kumari, Kriti Yadav, Anirbid Sircar
The naturally occurring heat inside the earth is renewable and sustainable and is known as geothermal energy. It is a renewable energy source that may be used in various applications, including milk pasteurization. This research focuses on the design considerations for developing geothermal-assisted milk pasteurization equipment which is first of its kind in Gujarat, India in direct application of
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A comparative study of machine learning and deep learning methods for energy balance prediction in a hybrid building-renewable energy system Renewables Pub Date : 2023-06-19 Mohammad Amin Mirjalili, Alireza Aslani, Rahim Zahedi, Mohammad Soleimani
Globally, the construction industry is experiencing an increase in energy demand, which has significant environmental and economic repercussions. To address these issues, it is now possible for buildings, vehicles, and renewable energy sources to collaborate and function as an advanced, integrated, and environmentally favorable system that meets the high energy demands of contemporary buildings. To
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Modeling and performance analysis of solar parabolic trough collectors for hybrid process heat application in Kenya’s tea industry using system advisor model Renewables Pub Date : 2023-06-01 Philip O. O. Akello, Churchil O. Saoke, Joseph N. Kamau, Jared O. H. Ndeda
Among the Concentrated Solar Collector (CSC) technologies, Parabolic Trough Collector (PTC) is the most mature and commercialized CSC technology today. Currently, solar PTC technology is mainly used for electricity generation despite its huge potential for heating, especially in industrial process heat (IPH) applications. Though the technology is well-developed and successfully used in many developed
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Effect of various parameters on the performance of solar PV power plant: a review and the experimental study Renewables Pub Date : 2023-04-10 Feroz Shaik, Syam Sundar Lingala, Punnaiah Veeraboina
One of the biggest causes of worldwide environmental pollution is conventional fossil fuel-based electricity generation. The need for cleaner and more sustainable energy sources to produce power is growing as a result of the quick depletion of fossil fuel supplies and their negative effects on the environment. Solar PV cells employ solar energy, an endless and unrestricted renewable energy source,
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Influence of Weibull parameters on the estimation of wind energy potential Renewables Pub Date : 2023-03-24 Abdoul Aziz, David Tsuanyo, Jl Nsouandele, Inouss Mamate, Ruben Mouangue, Patrice Elé Abiama
Wind potential estimation is generally evaluated using two-parameter (k, c) Weibull distribution. Root Mean Square Error (RMSE), Coefficient of Determination (R2) and Relative Error (RE) are computed in order to comparatively analyse fourteen methods of determining Weibull parameters. They are the Graphical Method, the Standard Deviation Method, the Empirical Method of Justus, the Empirical Method
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Study of wastewater treatment for freshwater production in a solar desalination unit Renewables Pub Date : 2023-02-28 Alireza Baghizade, Farshad Farahbod, Omid Alizadeh
While desalination of water is energy intensive, traditional use of fossil fuels makes it not only costly, but also unsustainable and environmentally unfriendly; utilization of solar energy for desalination is therefore highly encouraged. This paper presents a study on the technical performance of a solar desalination unit located in Tehran city. The process is modeled using standard energy equations
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Design models for small run-of-river hydropower plants: a review Renewables Pub Date : 2023-02-15 David Tsuanyo, Boris Amougou, Abdoul Aziz, Bernadette Nka Nnomo, Davide Fioriti, Joseph Kenfack
Hydropower plants are among the most efficient and reliable renewable energy systems in the world as far as electricity production is concerned. Run-of-river hydropower plants seem more attractive than conventional hydroelectric plants since they can be a cheaper and environmentally friendly alternative. However, their expected energy production pattern heavily depends on several construction variables
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Solar water heating based on Bellville weather conditions in winter Renewables Pub Date : 2023-01-31 Zamavangeli Mdletshe, Velaphi Msomi, Ouassini Nemraoui
Hot water supply is a daily necessity for various purposes ranging from industrial to domestic usage. However, the availability of hot water supply is dependent on reliable energy systems to heat the water. The load shedding plan declared the energy crisis in South Africa. Therefore, exploring alternative energy methods for hot water supply is critical, especially renewable energy resources. The use
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Fluctuations in the wind energy supply do not impair acceptance of wind farms Renewables Pub Date : 2023-01-16 Katsarava, Mariam, Gaschler, Robert
With the growing contribution of wind power to the electric energy supply, fluctuation in available wind energy might increasingly become part of public debate. Fluctuation influences energy prices and might lead to acceptance problems. As a first step to gauge potential communication strategies, we investigated in an experimental study if acceptance is influenced by being made aware of fluctuation
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Influence of operating conditions on solar energy utilization efficiency of flat plate solar collector Renewables Pub Date : 2022-09-17 Xiao, Shubo, Zhang, Ying, Xia, Kuiming, Long, Jibo
For the last 20 years, solar collectors have been developing rapidly in the use of energy in buildings. Under experimental conditions, the solar energy utilization efficiency (SEUE) of flat plate solar collectors (FPSC) can reach more than 80%, but the engineering application of SEUE is low, and even the collector heating cannot meet the design requirements. In this paper, based on the existing thermal
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Can wind and solar replace coal in Texas? Renewables Pub Date : 2022-03-14 Morse, Richard, Salvatore, Sarah, Slusarewicz, Joanna H., Cohan, Daniel S.
Texas has seen a rapid decline in coal use in recent years, but still burns more coal and emits more carbon dioxide and sulfur dioxide than any other state. Coal’s share of power generation in the Electric Reliability Council of Texas (ERCOT) system that covers most of the state fell to 20 percent in 2019, while wind grew to 20 percent and solar to 2 percent. Here, we investigate the potential for
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Techno-economic feasibility analysis of a 3-kW PV system installation in Nepal Renewables Pub Date : 2021-06-27 Ramhari Poudyal, Pavel Loskot, Ranjan Parajuli
This study investigates the techno-economic feasibility of installing a 3-kilowatt-peak (kWp) photovoltaic (PV) system in Kathmandu, Nepal. The study also analyses the importance of scaling up the share of solar energy to contribute to the country's overall energy generation mix. The technical viability of the designed PV system is assessed using PVsyst and Meteonorm simulation software. The performance
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Design of optimal hybrid power system to provide reliable supply to rural areas of Ethiopia using MATLAB and Homer Renewables Pub Date : 2021-02-05 Abraham Hizkiel Nebey
Integrating different energy resources, like solar PV, wind, and hydro is used to ensure reliable power to the rural community loads. Hybrid power system offers sufficient power supply for the rural villages by providing alternative supply for intermittent nature of renewable energy resource. Hence, intermittency of renewable energy resources is a challenge to electrify the rural community in a sustainable
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Energy storage system design for large-scale solar PV in Malaysia: techno-economic analysis Renewables Pub Date : 2021-01-22 Mahmoud Laajimi, Yun Ii Go
Large-scale solar is a non-reversible trend in the energy mix of Malaysia. Due to the mismatch between the peak of solar energy generation and the peak demand, energy storage projects are essential and crucial to optimize the use of this renewable resource. Although the technical and environmental benefits of such transition have been examined, the profitability of energy storage systems combined with
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Correction to: Wind turbine performance analysis for energy cost minimization Renewables Pub Date : 2021-01-17 Yassine Charabi, Sabah Abdul-Wahab, Hamidreza Ziaiefar
An amendment to this paper has been published and can be accessed via the original article.
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Multi-thermal performance optimization of semi-circular heat pipes integrated with various solar collector profiles Renewables Pub Date : 2021-01-07 Mohammed Yunus, Mohammad S. Alsoufi
Solar collector (SC) technology has proved promising applications in heating, desalination, refrigeration of water, etc. Thermal performance (TP) of Heat Pipe (HP) improves by combining the various profiled absorber plate with a flat-plate collector. The objective is to study HP attributes' effect (heat inputs, pipe inclinations, and mass flow rates of water) with various profiles of absorber plates
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Wind turbine performance analysis for energy cost minimization Renewables Pub Date : 2020-08-17 Yassine Charabi, Sabah Abdul-Wahab
The use of wind energy worldwide has overgrown in recent years to reduce greenhouse gas emissions. Wind power is free, but the installation and maintenance of wind turbines remain very costly. The size of the installation of the wind turbine is not only determined by wind statistics at a given location, but also by turbine infrastructure and maintenance costs. The payback time of the turbine is dependent
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Sustainability economic study of the islands of the Azores archipelago using photovoltaic panels, wind energy and storage system Renewables Pub Date : 2020-08-10 Inês Melo, João Paulo Neto Torres, Carlos Alberto Ferreira Fernandes, Ricardo A. Marques Lameirinhas
Currently, the nine islands of the Autonomous Region of the Azores have fossil fuel-fired power stations as the main source of electric power. Each island has an independent electrical system classified as an isolated micro-system, given its size and location. The aim of this paper is to analyse the best set of technologies to have nine sustainable hybrid systems. For this purpose, some factors will
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Potential assessment and experimental analysis of solar vegetable dryer: in case of northern Ethiopia Renewables Pub Date : 2020-08-08 Yihun Tefera Sintie, Gebrie Teshome Aduye
The traditional vegetable drying (open-air/sun drying) method of harvesting of tomato, potato and onion in the Fogera District in Amhara regional state, Ethiopia, leads to loss of product, reduction in the quality of product and economic loss for the poor farmers. So, this experiment aimed to show the effectiveness of solar dryer technology by increasing the quality of the product in tomato, potato
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Realizing ecosystem-safe hydropower from dams. Renewables Pub Date : 2020-06-01 Shahryar Khalique Ahmad,Faisal Hossain
For clean hydropower generation while sustaining ecosystems, minimizing harmful impacts and balancing multiple water needs is an integral component. One particularly harmful effect not managed explicitly by hydropower operations is thermal destabilization of downstream waters. To demonstrate that the thermal destabilization by hydropower dams can be managed while maximizing energy production, we modelled
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Fabrication of Ag nanoparticles adhered on RGO based on both electrodes in dye-sensitized solar cells (DSSCs) Renewables Pub Date : 2020-03-03 Kongsak Pattarith, Yonrapach Areerob
The electrode plays an important role in dye-sensitized solar cells (DSSCs). Preparation of the electrode should be simple and should result in high performance of its DSSC. We herein demonstrated high-performance and easily prepared Silver nanoparticles adhered on Reduced graphene oxide–Platinum composites (Ag–RGO/Pt) as counter electrodes (CEs) and TiO2 on RGO sheets with Ag (TiO2–RGO/Ag) as photoanode
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Application-based design of the Fresnel lens solar concentrator Renewables Pub Date : 2019-08-02 Hassan Qandil, Shuping Wang, Weihuan Zhao
A novel genetically themed hierarchical algorithm (GTHA) has been investigated to design Fresnel lens solar concentrators that match with the distinct energy input and spatial geometry of various thermal applications. Basic heat transfer analysis of each application decides its solar energy requirement. The GTHA incorporated in MATLAB® optimizes the concentrator characteristics to secure this energy
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Cost–benefit analysis for optimal DG placement in distribution systems by using elephant herding optimization algorithm Renewables Pub Date : 2019-06-26 C. Hari Prasad, K. Subbaramaiah, P. Sujatha
Distributed generations (DGs) are small generating plants which are connected to consumers in distribution systems to improve the voltage profile, stability improvement, reduction in power losses and economic benefits. The above benefits can be achieved by optimal placement of DGs. In this paper, a novel nature-inspired algorithm called elephant herding optimization algorithm is used to determine the
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Impact of solvents on the extraction and purification of vegetable dyes onto the efficiency for dye-sensitized solar cells Renewables Pub Date : 2019-06-24 Javier Ramirez-Perez, Calero Maria, Cristian P. Santacruz
Eight vegetable dyes extracted from flowers, fruits and leaves abundant in the wide biodiversity of the Andes region of South America were extracted with ethanol without purification to explore as vegetable photosensitizers in dye-sensitized solar cells (DSSCs). The absorbance spectra were measured by UV–visible spectroscopy and the photoelectrical performance of the DSSCs based on these dyes with
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Assessing solar and wind complementarity in Texas Renewables Pub Date : 2018-11-16 Joanna H. Slusarewicz, Daniel S. Cohan
As wind and solar power installations proliferate, power grids will face new challenges in ensuring consistent coverage from variable renewable resources. One option to reduce variability is to integrate the output from wind and solar facilities with dissimilar temporal profiles of output. This study measured the complementarity of wind and solar resources sited in various regions of Texas. This study
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An enhanced particle swarm optimization algorithm for improving the renewable energy penetration and small signal stability in power system Renewables Pub Date : 2018-09-21 T. K. Renuka, P. Reji, Sasidharan Sreedharan
In power systems, increasing the renewable energy penetration with small signal stability is one of the demanding and critical tasks in recent days. This research work aims to develop a multistage optimization technique, namely particle swarm optimization (PSO), for improving both the energy penetration and small signal stability. Here, the wind and solar power sources are considered, and its penetration
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Self-sufficiency of 3-D printers: utilizing stand-alone solar photovoltaic power systems Renewables Pub Date : 2018-05-31 Khalid Yousuf Khan, Lucia Gauchia, Joshua M. Pearce
A self-replicating rapid prototyper (RepRap) is a type of 3-D printer capable of printing many of its own components in addition to a wide assortment of products from high-value scientific or medical tools to household products and toys. There is some evidence that these printers could provide low-cost distributed manufacturing in underprivileged rural areas. For the most isolated communities without
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Optimal DG placement for benefit maximization in distribution networks by using Dragonfly algorithm Renewables Pub Date : 2018-05-30 M. C. V. Suresh, Edward J. Belwin
Distributed generation (DG) is small generating plants which are connected to consumers in distribution systems to improve the voltage profile, voltage regulation, stability, reduction in power losses and economic benefits. The above benefits can be achieved by optimal placement of DGs. A novel nature-inspired algorithm called Dragonfly algorithm is used to determine the optimal DG units size in this
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Low-cost virtual instrumentation of PV panel characteristics using Excel and Arduino in comparison with traditional instrumentation Renewables Pub Date : 2018-03-12 Aboubakr El Hammoumi, Saad Motahhir, Abdelilah Chalh, Abdelaziz El Ghzizal, Aziz Derouich
This paper presents a low-cost solution of virtual instrumentation to provide a new technique for real-time instrumentation of the PV panel characteristics such as voltage, current and power. The system design is based on a low-cost Arduino acquisition board. The acquisition is made through a low-cost current and voltage sensors, and data are presented in Excel by using the PLX-DAQ data acquisition
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Conditions for economic competitiveness of pumped storage hydroelectric power plants in Egypt Renewables Pub Date : 2018-03-01 Diaa Abdellatif, Rameen AbdelHady, Ahmed M. Ibrahim, Essam Abu El-Zahab
Pumped storage hydroelectric power plants are one of the most applicable energy storage technologies on large-scale capacity generation due to many technical considerations such as their maturity, frequency control and higher ramp rates, thus maintaining following loads in case of high penetration of renewables in the electrical grid. Economic viability of PSHPPs is still questionable when compared
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Use coal or invest in renewables: a real options analysis of energy investments in the Philippines Renewables Pub Date : 2018-01-25 Casper Boongaling Agaton
This paper aims to analyze the comparative attractiveness of either investing in various renewable energy sources or continue using coal for electricity generation in the Philippines. Using real options approach, this research evaluates the investment value and trigger prices of coal for switching technologies with some scenarios in coal price uncertainty and social discount rate. The results find
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An experimental study on effect of dust on power loss in solar photovoltaic module Renewables Pub Date : 2017-12-21 Athar Hussain, Ankit Batra, Rupendra Pachauri
In the present study, a detailed investigation on air dust particles effect on photovoltaic (PV) model performance has been carried out. The scanning electron microscope analysis of the collected dust samples was being carried out, and the obtained images were being analyzed in order to observe the character and topography of the dust sample particles. The data for dust samples of different weights
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Comparison between Kalman filter and incremental conductance algorithm for optimizing photovoltaic energy Renewables Pub Date : 2017-12-16 Saad Motahhir, Ayoub Aoune, Abdelaziz El Ghzizal, Souad Sebti, Aziz Derouich
The purpose of this paper is to present a performance comparison between two maximum power point tracking algorithms. These two algorithms are incremental conductance (INC) which is an improved version of the perturb and observe algorithm, and the second algorithm is the Kalman filter applied to a photovoltaic system. In this work, a photovoltaic panel is modeled in PSIM tool; a Boost converter controlled
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Autoencoder for wind power prediction Renewables Pub Date : 2017-12-16 Sumaira Tasnim, Ashfaqur Rahman, Amanullah Maung Than Oo, Md. Enamul Haque
Successful integration of renewable energy sources like wind power into smart grids largely depends on accurate prediction of power from these intermittent sources. Production of wind power cannot be controlled as the wind speed can vary based on weather conditions. Accurate prediction of wind power can assist smart grid that intelligently decides on the usage of alternative power sources based on
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Optimization of the distribution of wind speeds using convexly combined Weibull densities Renewables Pub Date : 2017-12-16 Jonas Gräbner, Johannes Jahn
This paper presents a new approach for the determination of the wind speed distribution based on wind speed data. This approach is based on the fact that, in general, wind speed distributions restricted to seasons of year or months are different. Therefore, instead of one Weibull density function, a convex combination of Weibull density functions is considered for a calendar year. This model improves