Article
Green & Sustainable Science & Technology
Maira Bruck, Peter Sandborn
Summary: Various policies and regulations govern the buying and selling of energy worldwide, with the United States implementing State-specific Renewable Portfolio Standards requiring specific percentages of renewable energy consumption. Power Purchase Agreements and Renewable Energy Credits typically use Levelized Cost of Energy calculations to determine prices but do not account for cash flow asymmetry.
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
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
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
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
Engineering, Marine
Yibo Liang, Yu Ma, Haibin Wang, Ana Mesbahi, Byongug Jeong, Peilin Zhou
Summary: A comprehensive numerical model was developed to predict the LCOE for offshore wind farms, with a case study in the offshore area of New York State. Specific local limitations in the United States were considered, leading to the identification of an optimal site and the introduction of the concept of WFED.
Article
Energy & Fuels
Giovanni Rinaldi, Anna Garcia-Teruel, Henry Jeffrey, Philipp R. Thies, Lars Johanning
Summary: This paper presents a methodology to calculate the capital and operational indicators of a floating wind farm, reducing uncertainties in the estimation of technical and economic parameters and emphasizing the importance of using detailed operation and maintenance models.
Article
Thermodynamics
Luiz Filipe de Assis Tavares, Milad Shadman, Luiz Paulo de Freitas Assad, Segen F. Estefen
Summary: This study examines the influence of different atmospheric reanalyses and models on offshore wind resource potential and cost estimation, focusing on the coastline of Rio de Janeiro state in Brazil. Significant differences in energy production and cost estimation were found, especially near the coastline, affecting project planning.
Article
Environmental Sciences
Yan Xu, Kun Yang, Jiahai Yuan
Summary: This paper evaluates the economic viability of offshore wind power projects in China and examines the LCOE values of projects in six typical provinces. The results indicate that offshore wind power projects in China are profitable and the grid parity era is on the horizon.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Thermodynamics
Nacef Tazi, Fatemeh Safaei, Faicel Hnaien
Summary: This paper provides a stochastic model of the levelized cost of energy (LCOE) to study the influences of various parameters on LCOE in renewable, non-renewable, and energy saving systems. It proposes a continuous optimization model to calculate the optimal LCOE under constraints of main expenditures, capturing parameters’ influences on this metric. Afterwards, a sensitivity analysis is conducted to assess the parameters' impacts on the LCOE.
Article
Green & Sustainable Science & Technology
Zhixue Yang, Zhouyang Ren, Zhenwen Li, Yan Xu, Hui Li, Wenyuan Li, Xiuqiong Hu
Summary: This paper proposes a comprehensive analysis method for levelized costs of energy (LCOE) in tidal current power generation farms (TCPGFs). The method takes into account the detailed investment and operation costs, as well as emission reduction benefits, and considers factors such as wake effects, reliability, and tidal current velocity characteristics in the evaluation.
Article
Green & Sustainable Science & Technology
Guozhou Zhang, Weihao Hu, Di Cao, Dao Zhou, Qi Huang, Zhe Chen, Frede Blaabjerg
Summary: This study proposes a coordinated dispatch method for wind farms considering uncertainty, and trains an agent using deep reinforcement learning algorithm to solve the problem. Simulation results demonstrate the effectiveness of the proposed method.
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
Economics
Artur Santa Catarina
Summary: This study analyzed 758 Brazilian wind power projects based on energy auctions data from 2009 to 2019 and examined their investment and scale using the Levelized Cost of Energy (LCOE). It found that the projects have seen improvements in capacity factors, total investment, and LCOE. Most projects have a capacity below 31 MW, with those above this threshold having lower LCOE. The study also compared LCOE values calculated using two taxation methods in Brazil and raised concerns about the economic situation of these projects in relation to the auction prices.
Article
Energy & Fuels
L. Barelli, G. Bidini, D. A. Ciupageanu, D. Pelosi
Summary: The fast-growing demand for renewable energy due to new stringent environmental policies necessitates the integration of energy storage systems to renewable generators. Hybrid storage systems, combining flywheel and battery technologies, can significantly reduce power profile fluctuations at the point of interface to the grid. Studies show that the use of hybrid storage systems can be economically competitive and beneficial for wind energy production.
JOURNAL OF ENERGY STORAGE
(2021)
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.