Article
Green & Sustainable Science & Technology
Adam E. Malek, Benjamin M. Adams, Edoardo Rossi, Hans O. Schiegg, Martin O. Saar
Summary: Advanced Geothermal Systems (AGS) generate electric power through conductive heat transfer from rocks using a closed-loop circuit. However, AGS is currently uneconomical due to its slow heat transfer rate compared to heat advection. The use of CO2 as the working fluid improves AGS performance, and there are optimal parameters that minimize AGS costs. Nevertheless, significant advancements in drilling technologies are necessary to make AGS cost-competitive.
Article
Green & Sustainable Science & Technology
Jundika C. Kurnia, Zulfan A. Putra, Oki Muraza, Seyed Ali Ghoreishi-Madiseh, Agus P. Sasmito
Summary: The study investigated the potential of converting abandoned oil wells into geothermal energy power plants and found that the Levelized Cost of Electricity (LCOE) for geothermal resources in Malaysia is relatively high, requiring multiple nearby abandoned oil wells or other renewable energy sources to reduce costs.
Review
Energy & Fuels
Jundika Candra Kurnia, Muhammad Syafiq Shatri, Zulfan Adi Putra, Juliana Zaini, Wahyu Caesarendra, Agus Pulung Sasmito
Summary: Retrofitting depleted oil wells for geothermal energy extraction is a promising proposal to extend the economic life of oil and gas wells. However, current studies mainly focus on technical and economic aspects, with little attention on policy. Comprehensive overview and regulations are key to the successful implementation of this initiative.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Mauro Tagliaferri, Pawel Gladysz, Pietro Ungar, Magdalena Strojny, Lorenzo Talluri, Daniele Fiaschi, Giampaolo Manfrida, Trond Andresen, Anna Sowizdzal
Summary: This study conducted a techno-economic analysis on different configurations of supercritical carbon dioxide-enhanced geothermal systems, and found that the mass flow rates and injection temperature of sCO(2) have a significant impact on the energy performance and cost estimation of the systems.
Article
Thermodynamics
Jesper Graa Andreasen, Enrico Baldasso, Martin Ryhl Kaern, Theresa Weith, Florian Heberle, Dieter Brueggemann, Fredrik Haglind
Summary: This paper evaluates the techno-economic feasibility of using zeotropic mixtures as working fluids in organic Rankine cycle power systems, finding that the mixture R1234yf/i-butane has the highest net present value. The techno-economic benefit of using mixtures is robust to variations in electricity price, working fluid cost, and equipment cost estimation models.
APPLIED THERMAL ENGINEERING
(2021)
Article
Environmental Studies
Mahelet G. Fikru, Kwame Awuah-Offei
Summary: This study presents a two-stage optimization model to explore the economics of critical minerals. The results suggest that expanding the production of critical minerals can be achieved by investing in efficient technologies and technologies with increasing returns to scale. However, mandating firms to process a certain percentage of geological input for critical mineral recovery would have unintended consequences of increasing the marginal cost of producing main minerals. The supply elasticity of critical minerals depends on the returns to scale of production.
Article
Engineering, Manufacturing
Christopher Price, Kristina Armstrong, Yarom Polsky, Annie Wang, Sachin Nimbalkar, Phillip Chesser, Brian Post, Jiann-Cherng Su
Summary: Geothermal reservoir characterization, construction, and operations are technology-intensive activities that contribute significantly to the cost of delivering renewable electricity. The low production volume of geothermal tools presents a major challenge in meeting the industry's technology needs. Advances in additive manufacturing provide opportunities to advance geothermal technology while reducing lead time and costs associated with production of low-volume, complex parts.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Environmental
Edgar Martin-Hernandez, Mariano Martin, Gerardo J. Ruiz-Mercado
Summary: Nutrient pollution of waterbodies is a global issue, and implementing sustainable phosphorus management systems has the potential to reduce phosphorus releases from livestock facilities. The developed framework allows for the evaluation and selection of nutrient recovery systems at livestock facilities, considering both environmental vulnerability and techno-economic factors.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Green & Sustainable Science & Technology
Shadi Bashiri Mousavi, Pouria Ahmadi, Ali Pourahmadiyan, Pedram Hanafizadeh
Summary: The study presents a new system integrating CAES and ORC, utilizing geothermal and solar energy as green thermal sources. Energy, exergy, and exergoeconomic analyses were applied to evaluate performance, along with parametric analysis and multi-objective optimization. Results show that the solar collector unit contributes the most to exergy destruction, with the system capable of producing power and hot water at desired efficiencies and cost rates through optimization.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Energy & Fuels
Koenraad F. Beckers, Nicolas Rangel-Jurado, Harish Chandrasekar, Adam J. Hawkins, Patrick M. Fulton, Jefferson W. Tester
Summary: Closed-loop geothermal systems, also known as advanced geothermal systems (AGS), have the potential to develop geothermal energy independent of site-specific geologic uncertainties and with limited risk of induced seismicity. This study presents a technical and economic analysis of closed-loop geothermal systems under different scenarios, evaluating the influence of various parameters on heat production and cost, including reservoir temperature, well termination depth, mass flow rate, injection temperature, fluid type, design configuration, and degree of reservoir convection.
Article
Engineering, Electrical & Electronic
Muhammad Osama Tarar, Naveed Ul Hassan, Ijaz Haider Naqvi, Michael Pecht
Summary: Electric vehicle battery swapping stations provide a suitable balance between swapping time and battery health indicators, promoting EV adoption and transport electrification. Fair and affordable prices can be determined, considering battery health and implementing appropriate pricing strategies. The battery's health and remaining useful life can be monitored during swapping, without significant increase in swapping time. The cost and feasibility of the swapping station model are compared with home and commercial charging stations, showing favorable results.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Engineering, Environmental
Sungyoon Park, Minsoo Kim, Yejee Lim, Jimin Yu, Siyu Chen, Sang Woon Woo, Sunho Yoon, Sungjun Bae, Han S. Kim
Summary: This study examined the binding characteristics of REEs within coal ash and found that the majority of REEs are strongly bound in the residual fraction, requiring the use of strong acids for extraction. Additionally, it was discovered that a significant portion of REEs can be recovered from wastewaters produced during coal ash-derived zeolite synthesis.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Ravita D. Prasad, Atul Raturi
Summary: This study conducts a feasibility study of a proposed 10 MW organic Rankine cycle geothermal power plant in Fiji, finding that it can generate a significant amount of clean energy and reduce emissions. The study also emphasizes the importance of a conducive regulatory environment and capacity building for the development of geothermal power.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Jingxuan Xie, Jiansheng Wang
Summary: Appropriate compatibility between exploitation and utilization systems is critical for geothermal electricity. This study proposes a potential enhanced geothermal system (EGS) that incorporates three typical power generation systems for electricity generation. The results indicate that the proposed system is more compatible and economical compared to other systems.
Article
Chemistry, Multidisciplinary
Nighat Afroz Chowdhury, Sidi Deng, Hongyue Jin, Denis Prodius, John W. Sutherland, Ikenna C. Nlebedim
Summary: The paper introduces an innovative technology using copper nitrate to dissolve REEs in NdFeB magnet swarf and recover them with a recovery rate of nearly 97%. The economic and environmental impacts have been quantified, showing the feasibility and benefits of adopting this acid-free dissolution technology for recycling.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Energy & Fuels
Luis Salala, Jonathan Argueta, Noel Lopez, Osmany Aparicio, Diana Martinez, Pedro Santos, Arturo Quezada, Oziel Garcia, Jose Erazo, Hiroyuki Yamagishi, Noriyoshi Tsuchiya
Summary: Geothermal systems have significant potential to replace reliance on fossil fuels. El Salvador, being tectonically active, already supplies a significant portion of its electricity demand using volcanic geothermal fields. The study compares different geothermal areas in El Salvador and highlights the controlling factors in the characteristics of geothermal reservoirs.
Article
Energy & Fuels
Lin Jia, Kewen Li, Yun Han, Chi Zhang, Lipeng Zhao
Summary: This study proposes a new approach of retrofitting abandoned oil wells into geothermal wells, and investigates the effects of different parameters on the performance using a numerical model. The results show that the enhanced fracture system significantly improves the efficiency of geothermal energy extraction, and optimal design should control the flow rate and use proppant.
Article
Energy & Fuels
K. H. Kvalsvik, H. Holmberg, R. K. Ramstad, K. Midttomme
Summary: This study proposes a new analytical equation that takes into account the advective heat in fractured rock, improving the accuracy of measuring thermal properties in borehole heat exchangers. The equation is applicable to all thermal response tests and provides a cost-effective alternative to numerical modelling.
Article
Energy & Fuels
Ronald Dipippo
Summary: This paper presents a technique of further preheating the working fluid in geothermal binary plants using extraction turbines, and evaluates the performance at various geofluid temperatures through working equations. The results indicate that this approach can be equally effective in geothermal binary plants as it is in conventional nuclear power plants.
Article
Energy & Fuels
Y. A. Popov, E. M. Chekhonin, E. G. Savelev, D. A. Ostrizhniy, A. B. Shakirov, R. A. Romushkevich, E. A. Babich, B. E. Andreyev, M. Y. Spasennykh, I. A. Sannikova
Summary: This paper describes the results of experimental geothermal studies on the formation surrounding the Savitskaya-300 well in the Volga-Ural oil and gas basin. The study found high thermal heterogeneity and anisotropy in the formation. The paper provides important data on thermal properties and heat flow variations in the well.
Article
Energy & Fuels
Viren Thakore, Hong Wang, Jy-An Wang, Yarom Polsky, Fei Ren
Summary: This paper focuses on the stability of foam-based fracturing fluid under high temperature and high pressure conditions. It is of significant importance for the development of foam fracturing fluid as an alternative to conventional water-based fracturing fluid in Enhanced Geothermal System (EGS). Experimental results show that with the appropriate selection of surfactants and stabilizing agents, stable foams can be obtained. Analytical models are developed to predict the foam stability for different foam compositions, considering the effects of temperature and pressure.
Article
Energy & Fuels
Hong Chang, Sheng Jiang, Haozhi Jiang, Yunjie Li, Zhengheng Gan, Songying Zhao
Summary: This study compared the bearing performance between phase change energy piles (GPEP) and traditional energy piles (TEP) using indoor modeling tests and theoretical formulas. The results showed that GPEP increased the ultimate bearing capacity of a single pile by about 13% compared to TEP. Additionally, the phase change materials effectively restricted the temperature-drag response of energy piles.
Article
Energy & Fuels
Qiang Zhang, Tiago Alves
Summary: This study investigates the influence of salt structures and faults on the geothermal potential in the Cleaver Bank High, Southern North Sea, using high-quality 3D seismic reflection data and bottom-hole temperature data. The results show that salt structures and faults play a significant role in the geothermal gradient, with higher gradients found on the footwalls of faults. Three potential geothermal exploration targets are identified based on the findings.
Article
Energy & Fuels
Hubert Langevin, Nicolo Giordano, Jasmin Raymond, Louis Gosselin, Martin Bourbonnais
Summary: This study evaluates the efficiency and cost of solar-assisted geothermal systems in a subarctic climate, and offers recommendations for optimizing ground heat exchanger configurations.
Article
Energy & Fuels
Lei Chen, Jinchuan Zhang, Longfei Xu, Shijing Chen, Qianchao Li, Yuhang Sun, Jie Li, Xingxu Zhao
Summary: This study assesses the geothermal water circulation process of a granite geothermal system in the Lancang area, Yunnan using water chemistry and isotope analysis techniques. The results show that the geothermal water originates from atmospheric precipitation and the granite pluton serves as the main heat source. Additionally, the fault system plays an important role in the discharge and mixing of hot and cold water.
Review
Energy & Fuels
Md Azhar, Somenath Mondal, Anh Minh Tang, Akhileshwar K. Singh
Summary: Contemporary geotechnical engineering practice involves the design and construction of structures that encounter thermal cycles. Understanding the effect of temperature on soil mechanical properties is challenging, but there have been significant contributions from numerous studies. However, to date, there is no comprehensive review that provides a holistic development of the subject and its connection to field applications.
Article
Energy & Fuels
Mark White, Yaroslav Vasyliv, Koenraad Beckers, Mario Martinez, Paolo Balestra, Carlo Parisi, Chad Augustine, Gabriela Bran-Anleu, Roland Horne, Laura Pauley, Giorgia Bettin, Theron Marshall, Anastasia Bernat
Summary: The study presents a comprehensive numerical modeling of closed-loop geothermal systems (CLGSs) and develops a publicly accessible web application for feasibility studies. The results suggest that competitive levelized cost of heat (LCOH) can be achieved, but significant reductions in drilling costs are required to achieve competitive levelized cost of electricity (LCOE). A site-based case study for multi-lateral systems and the analysis of permeable wet rock are also provided, indicating the potential for improved power production with higher reservoir permeability and temperature.
Article
Energy & Fuels
Xiaoming Tian, Oleg Volkov, Denis Voskov
Summary: In this study, an efficient and flexible adjoint-based framework is proposed for history matching and forecasting geothermal energy extraction. The framework reduces the parameter space using Principal Component Analysis and speeds up the iteration process using the adjoint method. Operator-based linearization is used for efficient calculation and matrix assembly. The framework is demonstrated to be highly efficient for a heterogeneous reservoir with multiple realizations, generating reliable history-matching results.
Article
Energy & Fuels
Asrillah Asrillah, Agus Abdullah, Klaus Bauer, Ben Norden, Charlotte M. Krawczyk
Summary: At the Gross Scho center dot nebeck geothermal research platform in the NE German Basin, the degree and direction of azimuthal velocity anisotropy caused by sub-vertical fracturing were determined through analysis of 3-D seismic reflection data. The observed anisotropy above the Zechstein salt roughly correlates to fault structures formed by an upwelling salt pillow, while below the salt, the less pronounced anisotropy and interpreted fracturing follow the trend of the regional stress field.
Article
Energy & Fuels
Kyosuke Okamoto, Yusuke Mukuhira, Dian Darisma, Hiroshi Asanuma, Hirokazu Moriya
Summary: Microseismic monitoring is crucial in geothermal development, and manual phase picking for seismic data is time-consuming. Existing deep learning phase pickers may face challenges in geothermal fields due to their unique features. This study focuses on developing a specialized deep learning model for local seismic networks in geothermal fields, allowing automatic hypocenter determinations and revealing subsurface fine structures.