Article
Green & Sustainable Science & Technology
Shoutu Li, Qin Chen, Ye Li, Stefan Probsting, Congxin Yang, Xiaobo Zheng, Yannian Yang, Weijun Zhu, Wenzhong Shen, Faming Wu, Deshun Li, Tongguang Wang, Shitang Ke
Summary: With the rapid increase in global wind power installation, noise pollution from wind turbines, especially in urban environments, has been attracting significant attention. Researchers conducted systematic experimental tests in an anechoic wind tunnel to enhance understanding of noise pollution caused by vertical axis wind turbines in urban areas. The results showed that low-frequency noise becomes more prominent as wind speed increases, and the blade-passing frequency plays a major role in generating low-frequency noise. Different designs were analyzed according to national standards from various countries, and an optimal design of a vertical axis wind turbine suitable for urban environments with minimal noise impact was identified.
Article
Engineering, Electrical & Electronic
Stanislav Piriienko, Wenwei Victor Wang, Martin Neuburger, Duleepa J. Thrimawithana, Alexander Balakhontsev
Summary: This article proposes a novel yaw inductive power transfer system for small-scale wind turbines, aiming to mitigate their main disadvantages. The system utilizes low-voltage mosfets in multilevel boost-series resonant topology combined with zero-voltage switching techniques to maximize efficiency. The peak power transfer efficiency of the proposed solution reaches 92.5%, converting generator voltage from 60 V dc to grid compatible 400 V dc.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Green & Sustainable Science & Technology
Shaohai Zhang, Xiaoxia Gao, Wanli Ma, Hongkun Lu, Tao Lv, Shinai Xu, Xiaoxun Zhu, Haiying Sun, Yu Wang
Summary: This study aims to establish a multi-dimensional analysis wake model that can perfectly describe the wake region of multiple wind turbines and analyze its three-dimensional spatial distribution characteristics. By considering the influence of wind shear, a three-dimensional wake model is derived and its accuracy is verified through wind field experiments. The results show that the model can better predict the three-dimensional distribution characteristics of the wake region after a single wind turbine and multiple wind turbines.
Article
Multidisciplinary Sciences
Linyue Gao, Hui Hu
Summary: A field campaign was conducted to investigate ice accretion features on large turbine blades and assess power output losses induced by ice accretion. The research found that during icing events, wind turbines experienced up to 80% power output losses.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geography
Vera Sadovska, Fredrik Fernqvist, Henrik Barth
Summary: This work presents empirical data on business model transformation in the agrifood sector, highlighting the driving factors and outcomes of sustainable value creation. The study reveals that factors such as the mindset of owner-managers, sustainability experiences, and market pressures play a significant role in driving transformation. Additionally, animal welfare principles and sustainable solutions for distribution and transport are essential for all firms. However, integrating sustainability into core business operations remains challenging due to a lack of knowledge and systemic approach. The study suggests six directions for future research in sustainable value creation through business model transformation.
JOURNAL OF RURAL STUDIES
(2023)
Article
Green & Sustainable Science & Technology
Alireza Arabgolarcheh, Amirhossein Rouhollahi, Ernesto Benini
Summary: Understanding the unsteady characteristics of the mid-to-far wake and comprehension of the aerodynamic performance of floating offshore wind turbines is essential for the further development of offshore wind farms. In this perspective, a developed Actuator line model is utilized to analyze an offshore turbine on four different platforms. The model reliability was examined through three sets of validations involving turbine output in fixed and floating conditions and wake expansion in terms of size and rate.
Article
Energy & Fuels
Mohamed Elnaggar, Hala J. El-Khozondar, Mohammed J. K. Bashir, Wael A. Salah, Mohammed Al-Agha, Mohammed Abudaqqa, Abdullah El-mabhouh
Summary: This study focuses on the potential of wind energy as a renewable and clean source of energy in Gaza for sustainable economy and environmental conservation. It found that different rotor diameters of wind turbines have varying effects on the turbine's performance and energy production. Using wind energy in Gaza can lead to significant annual energy savings and reduction in CO2 emissions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Aurelien Carre, Pierre Gasnier, Emile Roux, Laurent Tabourot
Summary: This paper presents the design and fabrication of a small-size propeller inspired by maple samaras and its experimental testing with an electromagnetic generator. The propeller optimizes aerodynamics at low Reynolds numbers and is one of the smallest wind turbines reported in the literature. The wind turbine's performance is tested under different wind speeds, and it demonstrates high efficiency and power density compared to other miniature wind turbines.
Article
Mechanics
Pedro K. Suzuki, Flavio D. Marques, Daniel A. Pereira
Summary: Electric energy is essential worldwide, but current energy matrices may not always be adequate. Wind energy is a viable source, although its use is limited. Centimeter-Scale Wind Turbines (CSWTs) offer a potential solution, but their design lacks a systematic procedure. This study proposes a modified approach to calculate power curves for CSWTs without the need for experimental tests. Three CSWTs were fabricated using a 3D printer and evaluated using wind tunnel testing. Results show that the modified method is well-suited for CSWT analysis, with better outcomes for turbines with more blades.
Article
Chemistry, Physical
Guannan He, Jeremy Michalek, Soummya Kar, Qixin Chen, Da Zhang, Jay F. Whitacre
Summary: Battery storage is constrained in the power grid by its economic feasibility, but can be made portable through trucking to enhance its value through various on-demand services. In California, mobile utility-scale energy storage can increase life-cycle revenues and improve renewable energy integration by alleviating local transmission congestion, with some areas able to fully offset costs through spatiotemporal arbitrage.
Article
Thermodynamics
Ernesto Arteaga-Lopez, Cesar Angeles-Camacho
Summary: This research introduces a new wind energy evaluation approach by integrating CFD studies for optimal placement of small wind turbines, which is more cost-effective than conventional methods. By simulating multidirectional flows and characterizing wind resources as a virtual computational domain (VCD), the VCD implementation allows for more accurate simulations and improved micrositing of wind turbines compared to traditional CFD studies.
Article
Energy & Fuels
Ander Zarketa-Astigarraga, Markel Penalba, Alain Martin-Mayor, Manex Martinez-Agirre
Summary: Small-scale horizontal axis wind-turbines (SHAWTs) are gaining importance in the wind industry's regulatory policies for achieving net-zero emissions and reducing visual and environmental impact through distributed grids. This study examines the combined effect of turbulence and roughness on the performance of a NACA0021 airfoil through wind tunnel experiments. The results show that the combined effects result in larger drops in lift and efficiency values compared to considering the perturbing agents individually, highlighting the importance of considering the joint effect of turbulence and roughness in experimental measurements and performance evaluation of wind turbines.
Article
Engineering, Electrical & Electronic
Jiayi Nie, Nianwen Xiang, Kejie Li, Weijiang Chen
Summary: In this study, a method for assessing lightning attractiveness in mountain wind farms is proposed. A full-size wind turbine model considering terrain topography is established, and the lightning collection area of the wind turbines is calculated using the self-consistent leader inception and propagation model. The relationship between terrain structure and the lightning collection area is obtained, and a shielding model is incorporated for differentiated lightning attractiveness assessment. The simulation results of lightning attractiveness for mountain wind farms are in good agreement with actual observation results in flat and mountainous areas, indicating the effectiveness of the proposed model in identifying weaknesses in lightning protection.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Review
Environmental Studies
N. Aravindhan, M. P. Natarajan, S. Ponnuvel, P. K. Devan
Summary: This research investigates the potential productivity of wind turbine installations in urban areas, considering turbulence and other environmental factors. Due to the unique conditions and uncertainties in urban environments, small-scale wind turbines perform less effectively compared to large-scale turbines. The findings of this study provide insights for the use of small and medium turbines in community homes.
ENERGY & ENVIRONMENT
(2023)
Review
Green & Sustainable Science & Technology
H. A. Porto, C. A. Fortulan, A. J. Porto
Summary: This study numerically compares the mechanical power performance of four horizontal-axis small wind turbines with different design characteristics. The results showed that the turbine designed for improved starting performed better in low average wind speeds, while the five-bladed turbine had a significant gain in power performance in all wind conditions.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Review
Green & Sustainable Science & Technology
Patrick Bujok, Frans Bjorn-Thygesen, George Xydis
Summary: This study investigates the energy management system of Midtjyllands Airport and proposes a sustainable energy strategy to reduce energy consumption and greenhouse gas emissions. The study sets specific objectives and an action plan to achieve them.
INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION
(2023)
Article
Green & Sustainable Science & Technology
Anders Hoffmann, Evanthia Nanaki, Peter Enevoldsen, George Xydis
Summary: This article discusses the issues of resource scarcity and overpopulation and explores the implementation and promotion of sustainable solutions. Through a Danish experiment, it is found that changing attitudes and promoting sustainable initiatives can significantly reduce fuel consumption. The article also emphasizes the importance of a modern society building on habits that propel citizens towards their goals and understanding the barriers posed by certain habits to achieve desired outcomes.
INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION
(2023)
Review
Engineering, Electrical & Electronic
Alexander Matathia, George Xydis
Summary: This paper discusses the benefits of an offshore wind transmission backbone grid for the east coast of the United States. It explains that following an individualistic approach like Europe has done so far is more costly and time-consuming, while a collectivistic approach and implementing a backbone grid can reduce costs and save time.
INTERNATIONAL JOURNAL OF EMERGING ELECTRIC POWER SYSTEMS
(2023)
Article
Green & Sustainable Science & Technology
Ryan Martini, George Xydis
Summary: Wind energy is gaining popularity as a low-cost and carbon-free technology, but the end-of-life strategies for wind turbine components, particularly the blades, pose challenges. This study discusses the current literature on blade reuse and recycling, proposing suggestions for applications and policy support. The estimates show a need for repurposing and recycling of 2.4 million metric tons of wind blades by 2043-2050, based only on the development zones on the East Coast.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Review
Environmental Sciences
Zinovia Spezakis, George Xydis
Summary: The USA plans to deploy 30 GW of offshore wind power by 2030 and is considering using existing oil and gas pipelines in the Gulf of Mexico to transport the wind power. This study examines the hydrogen market, retrofitting pipelines for hydrogen transportation, cost analysis, and potential policy support.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Katie Jost, George Xydis
Summary: There is a growing interest in the United States to take on a more significant role in offshore wind power development. The Biden administration aims to achieve close to 30 GW of offshore wind potential by investing in clean renewables and technology. However, achieving this goal is subject to various limiting factors, and a detailed analysis is necessary to progress the licensing process.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-ENERGY
(2023)
Article
Energy & Fuels
Ioannis Vardopoulos, Ioannis Vannas, George Xydis, Constantinos Vassiliades
Summary: Growing concerns over environmental issues and sustainable living have led to an increased interest in renewable energy and energy efficiency measures among homeowners in the real estate market. This study investigates homeowners' level of interest in investing in renewable energy sources and energy efficiency measures and how it relates to their perception of the market value of green buildings. Results indicate that the majority of homeowners surveyed are interested in investing in renewable energy sources and energy efficiency measures, and this interest is positively associated with their perception of the market value of green buildings. Furthermore, homeowners with higher income and education levels tend to be more interested in investing in renewable energy sources and energy efficiency measures and perceive green buildings as having higher market value.
Review
Engineering, Electrical & Electronic
Farangmeher Ghadiali, George Xydis
Summary: The integration of wind turbines and wind farms into the power grid presents challenges related to the variability of wind power, efficient power transmission, and advanced control and monitoring systems. Recent advances in technology have improved integration through the use of variable speed generators, power electronics, and advanced control algorithms. Communication systems have also been integrated for real-time monitoring and control, enhancing performance and the provision of ancillary services.
INTERNATIONAL JOURNAL OF EMERGING ELECTRIC POWER SYSTEMS
(2023)
Article
Environmental Sciences
Pedro Gomez Hernandez, Thomas Leopold Berg, George Xydis
Summary: The operation of the electricity grid can be severely disrupted by unexpected weather events, leading to emergencies and extensive outages. Finland has areas where weather impacts are particularly harsh, thus a study was conducted to assess the feasibility of a high-temperature proton-exchange membrane fuel cell backup power system for installation in these affected municipalities and regions.
Editorial Material
Energy & Fuels
George Xydis, Evanthia Nanaki
Article
Environmental Studies
Marko Lucic, George Xydis
Summary: This article investigates the effectiveness of a statistical model called Autoregressive Integrated Moving Average with Explanatory Variables in predicting volume-weighted average electricity prices. The model is tested on the intraday market of the Denmark-West bidding area over a two-year period. Results show that the model outperforms other commonly used forecasting methods, with an average mean absolute percentage error of 1.5%. The developed model proves useful for energy traders and market players in making informed decisions in the intraday market.
ENERGY & ENVIRONMENT
(2023)
Review
Engineering, Electrical & Electronic
Geoffrey Niswander, George Xydis
Summary: California's electric grid is facing challenges such as aging transmission infrastructure causing fires, obsolete power production sources, and slow penetration of new sources of power generation and energy storage into the energy marketplace.
INTERNATIONAL JOURNAL OF EMERGING ELECTRIC POWER SYSTEMS
(2023)
Article
Environmental Sciences
Kristian Svane, Peter Enevoldsen, George Xydis
Summary: The industrial cold stores can store thermal energy as passive thermal energy. They can contribute with flexible consumption by cooling further in periods of low-cost electricity. To fulfill the potential, data measurement is necessary to control the cold stores and ensure food safety. A case study showed that cooling further in periods of low-cost electricity could result in 30% savings, which could reach up to 40% with proper price forecasting. The full capacity of cold stores in Denmark can potentially use 2% of the average wind electricity production for thermal energy storage.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Agriculture, Multidisciplinary
Shuang Ning, George Xydis
Summary: The Chinese vertical farming industry has great market potential and opportunities, but it is still in the initial stage of development. The main challenges include high investment and operational costs, lagging technology development, inadequate government support, and low consumer awareness of vertical farming.
AIMS AGRICULTURE AND FOOD
(2023)
Article
Agriculture, Multidisciplinary
Jonas Sohn, Martynas Liulys, Dafni Despoina Avgoustaki, George Xydis
Summary: This study focuses on optimizing airflow uniformity in a vertical farm. Four different air distribution systems were simulated and evaluated using computational fluid dynamics analysis. The results indicate that providing air inlets along the layer length contributes to better airflow uniformity, and additional outlets can further improve uniformity.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2023)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)