Article
Green & Sustainable Science & Technology
Shamsan Alsubal, Wesam Salah Alaloul, Eu Lim Shawn, M. S. Liew, Pavitirakumar Palaniappan, Muhammad Ali Musarat
Summary: The Malaysian government aims to increase the usage of renewable energy to 20% by 2025, with hydropower and biomass being the main sources. Studies have shown that wind energy has economic potential in Malaysia, especially in locations like Kudat, Mersing, and Kuala Terengganu.
Article
Energy & Fuels
Lijun Zhang, Ye Li, Wenhao Xu, Zhiteng Gao, Long Fang, Rongfu Li, Boyin Ding, Bin Zhao, Jun Leng, Fenglan He
Summary: Offshore wind technology is shifting from bottom fixed to floating due to depletion of shallow water wind energy resources and maturity of Floating Offshore Wind Turbine. Detailed analysis on energy production and cost components of wind farm based on unsteady simulations provide insights for future wind farm plannings.
Article
Energy & Fuels
Lijun Zhang, Ye Li, Wenhao Xu, Zhiteng Gao, Long Fang, Rongfu Li, Boyin Ding, Bin Zhao, Jun Leng, Fenglan He
Summary: With the depletion of shallow water wind energy resources, offshore wind technology is shifting towards Floating Offshore Wind Turbines (FOWTs). In this study, we conducted a comprehensive analysis of wind farms based on simulations and cost decomposition. The study compares the performance of two FOWTs under different scenarios and discusses the impact of interaction on the levelized cost of energy. The findings suggest that a tandem layout with a distance of 9.25D is the optimal parameter choice.
Article
Energy & Fuels
Honora Driscoll, Nicholas Salmon, Rene Banares-Alcantara
Summary: The climate crisis is pushing for the transition from high-carbon ammonia to low-carbon and zero-carbon ammonia. Utilizing variable renewable energy for green ammonia production requires expensive energy storage, but tidal stream energy could be an ideal energy source due to its high availability and predictability. This paper explores the feasibility of using tidal stream energy for offshore green ammonia production through a case study on the Pentland Firth, showing promising results in reducing hydrogen storage requirement and decreasing the levelized cost of ammonia.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Chemistry, Multidisciplinary
Guangsheng Pan, Wei Gu, Qinran Hu, Jianxiao Wang, Fei Teng, Goran Strbac
Summary: This study assesses the cost and low-carbon competitiveness of electrolytic hydrogen in China, finding that implementing time-of-use electricity prices and subsidizing photovoltaics can improve cost and CO2 emissions performance. Different types and levels of subsidies should be carefully adopted based on provincial characteristics.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
Matt Shields, Philipp Beiter, William Kleiber
Summary: The study evaluates the spatial variability of LCOE caused by technology-induced cost reductions and highlights the considerable impact of technological innovations. The results suggest that prioritizing technology innovation research or funding decisions for advancing offshore wind technologies in the United States should take into account the spatial as well as temporal basis of these impacts.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Engineering, Marine
Zhan Lian, Weiye Yu, Jianting Du
Summary: The exploitation of marine renewable energy sources, such as offshore wind, wave, and tidal stream energy, is crucial for reducing carbon emissions in China. The study shows that a well-designed joint exploitation of offshore wind-wave-tidal stream energy yields better performance in terms of total power output and temporal stability in specific areas. The design principles for an efficient joint energy deployment are summarized, highlighting the importance of small wave energy output ratio for temporal stability, more tidal stream turbines for steadier output, and high potential of wave energy in increasing total power output in certain coastal areas.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Victor J. Ferreira, Gabriela Benveniste, Jose Rapha, Cristina Corchero, Jose Luis Dominguez-Garcia
Summary: This study presents a comprehensive tool to assess the economic aspects and environmental impacts of floating offshore wind farms. The tool considers various life cycle stages and provides overall and broken-down results. It aims to guide decision-makers and engineers towards sustainable floating wind technology and cost reduction strategies. Through case studies, the study generates different scenarios and calculates indicators such as LCOE values and GHG emissions.
Article
Green & Sustainable Science & Technology
Antoine Rogeau, Julien Vieubled, Matthieu de Coatpont, Pedro Affonso Nobrega, Guillaume Erbs, Robin Girard
Summary: The demand for hydrogen is expected to increase in the future, and offshore wind is a feasible option for generating hydrogen. A comprehensive study on cost modeling and geospatial analysis reveals the enormous potential of green hydrogen production in European seas. Offshore electrolysis is becoming more relevant over time, and by 2050, onshore electrolysis is only relevant for nearshore and shallow waters.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Energy & Fuels
Matt Shields, Philipp Beiter, Jake Nunemaker, Aubryn Cooperman, Patrick Duffy
Summary: Upsizing turbine capacity to 20 MW in a 2,500 MW power plant array can reduce the levelized cost of energy by over 23% compared to the global average installed in 2019, primarily due to reductions in balance-of-system and operation and maintenance costs. Improved installation vessels, optimized export systems, and novel operation and maintenance strategies are also identified as additional cost reduction opportunities. These results suggest that upsizing represents a significant cost reduction opportunity for offshore wind energy and will continue to shape the future of the sector.
Article
Green & Sustainable Science & Technology
Sung-ho Hur
Summary: A new control strategy of sharing controllers/converters for wind turbines is proposed to improve reliability and energy yield, especially for offshore wind turbines. The Matlab/Simulink model is utilized for simulation of each turbine, as well as for simulating clusters of multiple turbines.
Article
Green & Sustainable Science & Technology
Safdar Rasool, Kashem M. Muttaqi, Danny Sutanto, Mark Hemer
Summary: This paper discusses the potential of co-located offshore wind energy and wave energy systems in the renewable energy sector. It presents a multi-site analysis and energy estimation for different wind turbines and wave energy converters. The study explores the reduction in power variability through the use of the best performing converter and evaluates the effectiveness of different percentage mixes of wind and wave energy in a co-located wind-wave farm.
Article
Energy & Fuels
Garrett E. Barter, Latha Sethuraman, Pietro Bortolotti, Jonathan Keller, David A. Torrey
Summary: Leading wind turbine manufacturers are developing new generator technologies to ensure a stable supply chain of critical rare-earth magnets. Three different generator technologies, including a direct-drive permanent-magnet synchronous generator (DD-IPMSG), a medium speed gearbox coupled with a synchronous generator (MS-PMSG), and a direct-drive low-temperature superconducting generator (DD-LTSG), are evaluated for offshore wind turbines. The analysis shows that MS-PMSG has the lowest LCOE under constant operational expenditures, while DD-LTSG yields lower LCOE values for fixed-bottom turbines and turbines with a floating platform.
Article
Thermodynamics
Olayinka S. Ohunakin, Olaniran J. Matthew, Muyiwa S. Adaramola, Opemipo E. Atiba, Damola S. Adelekan, Oluwadamilare O. Aluko, Emerald U. Henry, Victor U. Ezekiel
Summary: Offshore wind power in Nigeria has the potential to alleviate the power crisis. The study analyzed wind speed and wind power data in the Gulf of Guinea, finding significant variations. Economic analysis identified deepwater areas as the most viable for wind energy exploitation.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Oceanography
Sergio Velazquez-Medina, Francisco Santana-Sarmiento
Summary: This study applied GIS-based techniques to identify priority zones for the exploitation of offshore wind farms in the Canary Islands. The method is crucial for detailed energy planning in isolated and weak electrical systems.
OCEAN & COASTAL MANAGEMENT
(2023)
Article
Thermodynamics
Danial Khojasteh, Shengyang Chen, Stefan Felder, William Glamore, M. Reza Hashemi, Gregorio Iglesias
Summary: This study examines the impact of future sea level rise on tidal stream energy resources in different types of estuaries. The findings indicate that prismatic estuaries experience a greater reduction in tidal stream energy than converging estuaries under sea level rise. This poses a challenge for the management of tidal energy generation in the future.
Article
Green & Sustainable Science & Technology
A. Martinez, G. Iglesias
Summary: This study provides a large-scale mapping of the LCOE of floating offshore wind over the European Atlantic, highlighting the influence of wind resource on the final cost of energy. The results show that areas with abundant wind resources have lower LCOE values, with distance to shore being the main variable affecting the LCOE within regions with similar wind resources.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Marine
Xingxian Bao, Zhichao Wang, Dianfu Fu, Chen Shi, Gregorio Iglesias, Hongliang Cui, Zhengyi Sun
Summary: This study presents machine learning methods for damage detection of thermoplastic composite pipes (TCPs) under noise conditions. The methods combine the random decrement technique (RDT) with random forest (RF) and long and short-term memory (LSTM) networks. Numerical and experimental studies verify the applicability and excellent performance of the proposed methods.
Article
Thermodynamics
Xingxian Bao, Fumiao Li, Huihui Sun, Gregorio Iglesias, Hongda Shi
Summary: This paper presents a multi-DOF wave energy converter (WEC) with hybrid power take-off (PTO) systems named PUWEC, which can capture more wave energy compared with a traditional single-DOF WEC. A time-domain numerical model is established to simulate the coupled dynamics and power capture performance of the PUWEC, and it is proven to be efficient in predicting the dynamic performance. The motion trajectory of the buoy's center of gravity and the actual working space of the PUWEC are also analyzed and calculated.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
A. Martinez, L. Murphy, G. Iglesias
Summary: This study investigates the impacts of climate change on offshore wind resources in Northern Europe over the 21st century, using the most up-to-date narratives of societal development and land use, the Shared Socioeconomic Pathways (SSPs). Three scenarios are considered: high-emissions (pessimistic) scenario SSP5-8.5, intermediate scenario SSP2-4.5, and low-emissions (optimistic) scenario SSP1-1.9. The results indicate an overall decline in wind power density, particularly in the high-emissions scenario and certain regions, while slight increases are projected in some areas of the Baltic Sea. Reducing emissions as advocated by current climate objectives not only weakens the declining trend but also leads to a more stable resource.
Article
Green & Sustainable Science & Technology
Sogol Moradian, Agnieszka I. Olbert, Salem Gharbia, Gregorio Iglesias
Summary: In this study, the wind resource was analyzed and its potential was estimated to determine the most suitable sites for wind farms in Ireland. Historical and future wind data were evaluated and statistical distributions were applied to post-process the outputs. Results showed a decrease in wind speed in the future period and wind power density maps were produced.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Thermodynamics
D. M. Fouz, R. Carballo, I. Lopez, X. P. Gonzalez, G. Iglesias
Summary: A novel approach to selecting the most appropriate combination of hydrokinetic energy converters (HECs) and sites within a coastal area is developed, with the accurate computation of cost-effective analysis (CEA) parameters as the cornerstone. By avoiding simplistic assumptions, the proposed approach improves on current procedures and enables developers to accurately compute any cost-effective parameter of interest.
Article
Thermodynamics
A. Martinez, G. Iglesias
Summary: The evolution of offshore wind resources in the Mediterranean Sea up to 2100 was studied under different climate-change scenarios. The results showed a decline in mean wind power density and increased variability in most scenarios, except for the low-emissions scenario. This scenario predicted strong growth in certain areas, such as around the Italian Peninsula and off Lebanon and Israel. Seasonal variability was also found to change significantly depending on the scenario and period considered. Reducing carbon emissions in line with international climate accords may help mitigate the decline in wind resources and increase in variability in the Mediterranean Sea.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Review
Oceanography
Emilio Laino, Gregorio Iglesias
Summary: The impacts of climate change on coastal cities, such as sea level rise, temperature increase, storms, and extreme weather events, can lead to coastal flooding, erosion, and other hazards. This comprehensive review analyzes scientific literature on the extreme impacts of climate change on coastal cities, identifying research gaps and proposing future directions. The analysis includes a bibliometric and scientometric analysis, revealing a wide geographical diversity with publications from 97 countries, and highlighting the need for more research from developing countries.
OCEAN & COASTAL MANAGEMENT
(2023)
Article
Engineering, Marine
Xingxian Bao, Meng Liu, Dianfu Fu, Chen Shi, Hongliang Cui, Zhengyi Sun, Zhihui Liu, Gregorio Iglesias
Summary: This study proposes a deep learning method that integrates the random decrement technique (RDT) and Transformer neural network to identify damages in jacket offshore platforms. Numerical simulations and experimental studies demonstrate the effectiveness of the proposed method in accurately locating and assessing the severity of damages.
Article
Engineering, Marine
Nerea Portillo Juan, Javier Olalde Rodriguez, Vicente Negro Valdecantos, Gregorio Iglesias
Summary: The physics-based approach is commonly used for modelling ocean engineering processes, but data-driven models are gaining popularity. However, there are limited studies on data-driven models for wave downscaling. In this paper, both approaches are developed and compared in a case study in the Mediterranean Sea. Neural networks outperform the SWAN model in predicting peak period, with a higher correlation coefficient and lower error. The data-driven approach has a clear advantage in terms of computational cost. It is concluded that data-driven models are useful in sites with a sufficient number of data samples, especially in semi-enclosed basins governed by local patterns.
Review
Engineering, Marine
Danial Khojasteh, Abbas Shamsipour, Luofeng Huang, Sasan Tavakoli, Milad Haghani, Francois Flocard, Maryam Farzadkhoo, Gregorio Iglesias, Mark Hemer, Matthew Lewis, Simon Neill, Michael M. Bernitsas, William Glamore
Summary: In the past two decades, a significant amount of academic research has been conducted on wave and tidal energy. This review uses a bibliometric method to analyze over 8000 documents published between 2003 and 2021, identifying four broad research themes and nineteen corresponding research sub-clusters. It is observed that there has been a shift in research focus towards integrating wave/tidal energy schemes into coastal/estuarine management plans.
Review
Green & Sustainable Science & Technology
Emilio Laino, Gregorio Iglesias
Summary: This review paper examines the impacts of climate change on ten European coastal cities through a participatory process involving the cities and the review of existing literature. By combining scientific literature analysis with insights from local experts, it provides a comprehensive overview of the current situation of these diverse cities in relation to multiple climate-related hazards, which can be extrapolated to other cities.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Green & Sustainable Science & Technology
Meysam Asadi, Kazem Pourhossein, Younes Noorollahi, Mousa Marzband, Gregorio Iglesias
Summary: Currently, there is global attention towards clean and sustainable energy due to its environmental benefits. This paper introduces a novel method for selecting optimal locations for wind and solar farms, utilizing GIS and AHP methods combined with a multiple linear regression model. The reliability and global evaluation of the site scoring method used in the study ensures accurate and effective results. The proposed method showed successful results in two study areas and was validated using existing wind/solar farms from different continents, suggesting its applicability in selecting optimum sites worldwide.
Article
Geosciences, Multidisciplinary
Emilio Laino, Gregorio Iglesias
Summary: This study develops a method based on Coastal City Living Labs to characterize key climate-related hazards in ten European coastal cities and categorizes these hazards based on the recommendations of the latest climate change assessment report. The main hazards identified include storms, coastal and land flooding, and coastal erosion. Significant differences are found between cities and even within the same city, emphasizing the importance of granularity in designing mitigation measures.