Article
Green & Sustainable Science & Technology
Murat Ozturk, Ibrahim Dincer
Summary: This paper develops a new integrated system using geothermal energy and conducts a comprehensive performance evaluation. Through parametric investigation and evaluation, the system efficiency and exergy destruction rates among different subsystems are obtained.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Energy & Fuels
Jian Huang, Azher M. Abed, Sayed M. Eldin, Yashar Aryanfar, Jorge Luis Garcia Alcaraz
Summary: Compared with conventional fossil fuel sources, geothermal energy is safe and sustainable, suitable for meeting heating power needs. This study proposes a combined power generation cycle using the EES software, which improves the design characteristics of the system. The proposed strategy is further optimized using the Nelder-Mead simplex method and Genetic Algorithm, resulting in increased exergy efficiency. The exergy destruction of different system components is also calculated and analyzed.
Article
Green & Sustainable Science & Technology
Gurcan Cetin, Osman Ozkaraca, Ali Kecebas
Summary: The study developed a new and optimal control strategy to maximize the exergy efficiency of a geothermal power plant system by controlling flow rate, pressure, and NCG percentage. The results showed a 25% increase in exergy efficiency and a 23% increase in power generation, demonstrating the effectiveness of the proposed strategy.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Green & Sustainable Science & Technology
Fatih Yilmaz
Summary: This research proposes a geothermal energy-supported integrated plant for versatile energy production, analyzing its thermodynamic and environmental impacts to optimize performance and reduce greenhouse gas emissions. The total energy and exergy efficiencies of the system are calculated to be 63.28% and 55.99%, with subplants achieving 22.31% and 25.18% energy efficiency. Additionally, the modeled cycle has the potential to save approximately 26421 tons of CO2 gas emissions annually compared to using coal for power generation.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Thermodynamics
Mohammad Jalili, Ata Chitsaz, Mehran Hashemian, Marc A. Rosen
Summary: Environmental and economic factors play vital roles in thermodynamic systems design, and exergoeconomic and exergoenvironmental analyses are utilized to assess energy production systems. By using the concept of emergy, this research aims to improve understanding of economic and environmental impacts. The application of emergy-based exergoeconomic and exergoenvironmental balances provides insights for a combined flash and binary geothermal system, showing the need for strategies to reduce destruction emergy.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Review
Thermodynamics
Arman Haghighi, Mohammad Reza Pakatchian, Mamdouh El Haj Assad, Vinh Nguyen Duy, Mohammad Alhuyi Nazari
Summary: Geothermal energy, as a renewable energy source, is widely used due to its independence from weather conditions. Organic Rankine cycles play a crucial role in generating power from low- or medium-temperature heat sources in geothermal power plants. The performance of geothermal-based ORCs is greatly influenced by the operating fluid, working conditions, and cycle configuration.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Yan Cao, Leonardus W. W. Mihardjo, Mahidzal Dahari, Hadi Ghaebi, Towhid Parikhani, Abdeliazim Mustafa Mohamed
Summary: An innovative double-flash binary geothermal system integrated with ejector cooling cycle was designed for cogeneration purposes. The feasibility of the system was evaluated using exergy and thermal balance relations. Parameter evaluations showed that adjusting separator 2 pressure could optimize system performance, while booster pressure ratio and evaporator temperature also had significant impacts on system efficiency.
Article
Engineering, Environmental
Farayi Musharavati, Shoaib Khanmohammadi, Rasikh Tariq
Summary: This study conducted a comparative exergy analysis, multi-objective optimization, and extended environmental analysis of a geothermal-based power and refrigeration system. Configuration 3 showed the highest net output power and energy efficiency, but also had the highest environmental footprint.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Green & Sustainable Science & Technology
Tao Hai, Masood Ashraf Ali, As 'ad Alizadeh, Hayder A. Dhahad, Sattam Fahad Almojil, Abdulaziz Ibrahim Almohana, Abdulrhman Fahmi Alali, Vishal Goyal, Babak Farhang
Summary: This paper proposes and analyzes two novel configurations for hybridization of geothermal and biomass energies. In Configuration 1, geothermal heat is used for feed water heating, while in Configuration 2, geothermal energy is used for steam generation for the low pressure steam turbine stage. The method of hybridization of geothermal and biomass resources in this paper is different from previous researches and can utilize geothermal resources with various temperature levels.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Thermodynamics
Hilal Sayhan Akci Turgut, Ibrahim Dincer
Summary: This study develops an integrated binary geothermal energy system for the production of green methanol, combining electricity and freshwater sythesis. The thermodynamic analysis and assessment of the system are carried out using energy and exergy methodologies. The results show that the developed system effectively utilizes geothermal energy to produce a significant amount of green methanol.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Biology
Shyam Marjit, Trinav Bhattacharyya, Bitanu Chatterjee, Ram Sarkar
Summary: This paper proposes a meta-heuristic approach called SAGA, which combines simulated annealing and genetic algorithm to identify informative genes from high-dimensional datasets. SAGA outperforms other algorithms by utilizing a clustering-based population generation and a score-based filter approach.
COMPUTERS IN BIOLOGY AND MEDICINE
(2023)
Article
Chemistry, Multidisciplinary
Shuo Liu, Hao Wang, Yong Cai
Summary: This study addresses the multiobjective optimization problem of irregular objects in the field of aquatic product processing by developing a simulated annealing algorithm. The algorithm's mutation strategy was optimized, and its effectiveness was demonstrated through experiments.
APPLIED SCIENCES-BASEL
(2021)
Article
Thermodynamics
Moein Shamoushaki, Daniele Fiaschi, Giampaolo Manfrida, Lorenzo Talluri
Summary: A conceptual geothermal power plant with Non-Condensable Gases (NCGs) reinjection is analyzed in terms of energy, exergy, exergo-economic, and environmental perspectives. The study evaluates the performance of the cycle under subcritical and supercritical working conditions, and performs a sensitivity analysis to assess the impact of condensing temperature, turbine inlet pressure, and NCGs amount on the system. The results show that increasing condensing temperature decreases efficiency and power, while increasing turbine inlet pressure has mixed effects. The supercritical cycle has a higher levelized cost of electricity (LCOE) compared to the subcritical cycle.
Article
Computer Science, Artificial Intelligence
E. Gangadevi, R. Shoba Rani, Rajesh Kumar Dhanaraj, Anand Nayyar
Summary: Crop diseases pose a threat to food security, and timely detection is challenging due to infrastructure limitations. This study focuses on accurately and timely identifying tomato plant diseases. A hybrid fruit fly optimization algorithm and support vector machine are used to reduce optimization problems, presenting a multi-objective identification method.
NEURAL COMPUTING & APPLICATIONS
(2023)
Article
Thermodynamics
Joel M. Zinsalo, Louis Lamarche, Jasmin Raymond
Summary: This paper presents a coupled Wellbore-Reservoir-Organic Rankine Cycle (ORC) power plant model for sustainable and efficient use of multiple-fractures Enhanced Geothermal System. A multi-objective optimization of the ORC was conducted using constrained NSGA-II technique. The results show that different working fluids have significant effects on the geofluid temperature, while the production temperature is less affected. The best performing working fluid is R1233zd(E), providing an energy efficiency of 19.2e19.32% and an exergy efficiency between 56.4% and 58.44% over the 40 years of production.
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.