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
Thermodynamics
Hector Del Pozo Gonzalez, Fernando D. Bianchi, Jose Luis Dominguez-Garcia, Oriol Gomis-Bellmunt
Summary: Nowadays, offshore renewable energy, due to less space limitations and better weather conditions, is increasingly seen as an attractive alternative to onshore energy. However, the higher costs in installation and maintenance demand a continuous search for higher conversion efficiency. Co-locating wind and wave power sources might serve to reduce generation power variability and take advantage of using the same infrastructure and implementation area. The optimization and control of these co-located offshore energy conversion systems have not been extensively studied.
Article
Green & Sustainable Science & Technology
Eric Gubesch, Nataliia Y. Sergiienko, Jean-Roch Nader, Boyin Ding, Benjamin Cazzolato, Irene Penesis, Ye Li
Summary: Integrating wave energy converters with offshore wind farms can reduce costs, and experimental results show that active control of the converters can reduce loads on wind turbines.
Article
Thermodynamics
Siyu Tao, Qingshan Xu, Andres E. Feijoo-Lorenzo, Gang Zheng, Jiemin Zhou
Summary: The paper proposes an optimization model for co-located wind/tidal current farms and uses the complement of forbidden zones to determine feasible areas, solving the problem with the multi-swarm optimization algorithm. The study shows that the layout optimization of a co-located WF/TCF is an economically and technically efficient approach to harvesting marine renewable energy.
Article
Engineering, Marine
Victor Ramos, Gianmaria Giannini, Tomas Calheiros-Cabral, Mario Lopez, Paulo Rosa-Santos, Francisco Taveira-Pinto
Summary: This study aims to explore the potential benefits of co-locating CECO, a wave energy converter, with a commercial wind farm. The research found that the co-located farm would increase annual energy production by 19% and significantly reduce the average cost of energy. However, the benefits in terms of power output smoothing would be minimal due to the seasonal behavior of the wave resource.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Sara Porchetta, Domingo Munoz-Esparza, Wim Munters, Jeroen van Beeck, Nicole van Lipzig
Summary: Offshore wind energy has been steadily increasing as an ideal alternative energy source. This study shows the power production and wake lengths of 1250 offshore wind turbines in the German Bight, highlighting the significant impact of waves on wind farm power production and wake lengths in the offshore wind environment.
Article
Energy & Fuels
Fantai Meng, Nataliia Sergiienko, Boyin Ding, Binzhen Zhou, Leandro Souza Pinheiro Da Silva, Benjamin Cazzolato, Ye Li
Summary: This paper proposes a solution of combining a floating offshore wind turbine with a small wave energy converter to achieve reliable overall power production and minimize the motion of a floating platform. By controlling the hydrodynamic coupling between the wind turbine and wave energy converter via a model predictive control approach, this novel approach successfully achieves platform stability and power reliability simultaneously. This work can serve as a guidance for operating co-located wind-wave power systems.
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)
Review
Green & Sustainable Science & Technology
V. Sykes, M. Collu, A. Coraddu
Summary: The development and deployment of offshore wind farms have significantly increased in the last decade, reaching a total capacity of 743 GW globally. The adoption of floating offshore platforms is expected to further drive this growth. However, uncertainty and cost increase are the main disadvantages of offshore wind, due to complex structures and longer distances to shore. This study reviews existing cost models and compares their accuracy and assumptions.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Thermodynamics
Aitor Saenz-Aguirre, Jon Saenz, Alain Ulazia, Gabriel Ibarra-Berastegui
Summary: This paper analyzes the ability of wave energy converters to maximize hydrogen production in hybrid wind and wave far offshore farms. Through various methods and simulations, the feasibility and applicability of this technology in certain offshore areas are determined, offering a viable solution to improve efficiency and economic profit of offshore farms.
ENERGY CONVERSION AND MANAGEMENT
(2022)
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
Thermodynamics
A. Martinez, G. Iglesias
Summary: This study examines potential areas for the development of a floating offshore wind farm in the Republic of Ireland using the levelised cost of energy (LCOE). Eligible locations are determined based on the characteristics of the maritime landscape, and Irish port facilities suitable for a floating wind farm are also identified. The LCOE is computed and mapped, considering factors such as distance to the coast and port facilities, water depth, and wind climate. The analysis reveals that wind climate and distance to the coast play significant roles in the LCOE, while the distance to suitable port facilities has a relatively smaller impact.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Christopher Stoddart, Firdaus Muhammad-Sukki, Mark Anderson, Jorge Alfredo Ardila-Rey, Ahmad Syahrir Ayub, Mohd Firrdhaus Mohd Sahabuddin, Mohd Khairil Rahmat, Mohd Nabil Muhtazaruddin, Muhammad Zulkipli
Summary: Offshore wind power is rapidly developing, with subsidy free bids being introduced by governments such as the Netherlands and Germany. This paper investigates the feasibility of a subsidy free bid for the Scottish government and provides insights into the financial scenarios for implementing such bids. The study concludes that it is indeed possible to adopt a subsidy free bid under the current UK contract for difference scheme.
APPLIED SCIENCES-BASEL
(2022)
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
Green & Sustainable Science & Technology
Barry Johnston, Aoife Foley, John Doran, Timothy Littler, Michael McAleer
Summary: Offshore wind energy costs have decreased significantly, making it a more competitive low carbon energy source. This study provides a methodology for modeling the levelized cost of offshore wind, and the analysis shows a range of potential outcomes in Ireland. Understanding the financial components of these projects will help in making investment decisions and determining the necessary support for offshore wind energy.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Marine
T. Buettner, C. Perez-Collazo, J. Abanades, M. Hann, P. Harper, D. Greaves, H. Stiesdal
Summary: In this study, physical modelling was used to investigate the transport process of the de-ballasted OrthoSpar device. The results showed that the roll and pitch motions were highly dependent on the wave frequency and damping ratio. Additionally, the towing load amplitude was influenced by both the wave direction and the towing direction.
Review
Green & Sustainable Science & Technology
Danial Khojasteh, Matthew Lewis, Sasan Tavakoli, Maryam Farzadkhoo, Stefan Felder, Gregorio Iglesias, William Glamore
Summary: This study proposes a hierarchy of factors that may influence the future of estuarine tidal energy resources in the context of sea level rise induced by climate change. The existing uncertainty regarding the impact of sea level rise on tidal energy resources calls for comparative studies across different regions and estuary types to bridge knowledge gaps and provide insights for policymakers and stakeholders.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Marine
Marcos Sanchez, David Mateo Fouz, Ivan Lopez, Rodrigo Carballo, Gregorio Iglesias
Summary: This study analyzes the potential effects of tidal stream farms on residual circulation and its seasonality using a case study. The results show that regardless of the configuration and forcings considered, the general residual flow pattern does not experience significant modifications when a tidal farm operates.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
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.
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.
