Article
Geochemistry & Geophysics
Enjiang Wang, Jose M. Carcione, Fabio Cavallini, Marco Botelho, Jing Ba
Summary: The study extends the thermoelasticity wave equation to porous media, including the LS and GL theories with relaxation times. It predicts multiple propagation modes and attenuation characteristics. This research contributes to a better understanding of wave propagation in high-temperature high-pressure fields.
SURVEYS IN GEOPHYSICS
(2021)
Article
Green & Sustainable Science & Technology
Guofeng Song, Xianzhi Song, Fuqiang Xu, Gensheng Li, Yu Shi, Jiayan Ji
Summary: This research aims to quantify the contributions of mechanical and chemical behaviors to reservoir feature variation during geothermal production, and a fully coupled THMC model is developed. The findings show that the mechanical effect plays a major role near the injection well and in a short term, while the chemical effect is dominated far from the injection well.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Geological
Xin Cui, Louis Ngai Yuen Wong
Summary: Enhanced geothermal systems (EGS) are currently the most efficient method to extract heat from hot dry rock (HDR) reservoirs. This study developed a novel 3D thermo-hydro-mechanical coupling model to predict the long-term performance of EGS. The simulation results showed that while EGS maintains high productivity during early injection stages, it degrades rapidly once thermal drawdown occurs.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Energy & Fuels
Tianwei Sun, Qingdong Zeng, Huilin Xing
Summary: The study presents a coupled thermo-hydro-mechanical model to simulate multiple hydraulic fracture propagation. It is found that non-uniform fracture spacings and increasing spacing away from the wellbore heel promote uniform growth of multiple fractures. Single-wing fracturing greatly improves the uniform growth of multiple hydraulic fractures.
Article
Mathematics, Applied
Yuxiang Chen, Zhihao Ge
Summary: In this paper, a multiphysics finite element method is proposed for the quasi-static thermoporoelasticity model with small Peclet number. The method is proved to have existence, uniqueness, stability and optimal convergence order. Numerical examples are provided to verify the theoretical results.
JOURNAL OF SCIENTIFIC COMPUTING
(2022)
Article
Construction & Building Technology
Tongqiang Xiong, Jianlin Li, Lehua Wang, Huafeng Deng, Xiaoliang Xu
Summary: This paper discusses the impact of ice-snow melting on accumulation bank slope and presents a coupling algorithm and numerical simulation results.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Ziyuan Cong, Yuwei Li, Yu Liu, Yonghui Xiao
Summary: This study proposed a stress numerical search method based on the maximum circumferential stress criterion to predict the fracture propagation angle in hydraulic fracturing. The method was found to be more consistent with real conditions and could be used to predict fracture propagation trajectories with different rock and construction parameters.
COMPUTERS AND GEOTECHNICS
(2021)
Review
Geochemistry & Geophysics
Shemin Ge, Martin O. Saar
Summary: This article provides a concise review of the triggering mechanisms of induced earthquakes, focusing on hydro-mechanical processes. Four mechanisms are reviewed: pore-fluid pressure diffusion, poroelastic stress, Coulomb static stress transfer, and aseismic slip. Several outstanding questions are discussed, and conclusions are drawn based on the review.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Energy & Fuels
Mohammad Ebrahimi, Mohammad Javad Ameri, Younes Alizadeh Vaghasloo, Mohammad Sabah
Summary: Assessing, predicting, and controlling injection-induced seismicity in enhanced geothermal systems is challenging due to the complex THM processes. This study developed a fully coupled numerical model to assess the behavior of low permeable matrix-fracture during non-isothermal fluid injection. Numerical simulations showed a fully coupled relation between matrix dilation, shrinkage, and non-linear fracture deformation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
L. J. Oestringer, C. Proppe
Summary: In this paper, influence functions for fully coupled quasi-static thermoelasticity are introduced. They provide a means to calculate displacements, stresses, and temperature distributions within a halfspace for various shaped and time-dependent heat sources or pressure distributions on the surface. The potential theory is utilized to solve the underlying equations for a mechanically or thermally loaded rectangular element on the surface. The results are validated and can be easily applied to the theory of poroelasticity, which shares the same underlying equations. Example calculations for different pressure and temperature fields are conducted, and the simulation results are discussed in comparison with the uncoupled case. Estimations are made regarding the extent to which the Gough-Joule effect and its consequences can be neglected.
MECHANICS OF MATERIALS
(2023)
Article
Geochemistry & Geophysics
Lei Jin
Summary: This study presents a new approach to model fluid-induced seismicity in fractured poroelastic media, by modeling hydro-mechanical triggering and seismological modeling. It analyzes the effects of fractures and full coupling on stress, overpressure, and seismicity.
Article
Computer Science, Interdisciplinary Applications
A. A. Jameei, S. Pietruszczak
Summary: This study investigates the evolution and coalescence of localized damage zones in sparsely fractured crystalline rocks. A novel approach is proposed that incorporates a constitutive law with embedded discontinuity and accounts for the hydromechanical interaction in the regions intercepted by discontinuities. The results are verified through benchmark problems and further analyses are conducted to examine the hydromechanical response in the presence of multiple fractures.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Multidisciplinary
M. D. Iqbal, C. Birk, E. T. Ooi, H. Gravenkamp
Summary: This study presents the development of the scaled boundary finite element method for modeling discrete crack propagation induced by thermal loads. The SBFEM excels in accurately modeling stress singularities at sharp crack tips. The formulation for steady-state thermal stress analysis is presented, with consideration for initial strains due to temperature in subsequent stress analysis. Several numerical examples are provided to validate the technique and illustrate its features.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Mathematics, Applied
Juan E. Santos, Jose M. Carcione, Jing Ba
Summary: The study demonstrates the existence of a unique solution for wave propagation in linear thermo-poroelastic isotropic media, showing regularity in both space and time variables.
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
(2021)
Article
Computer Science, Interdisciplinary Applications
Zhan Yu, Jianfu Shao, Gilles Duveau, Minh-Ngoc Vu, Gilles Armand
Summary: This study focuses on numerical modeling of hydromechanical response and induced damage zones around an experimental gallery at the underground research laboratory in France, using a new phase-field method that considers two independent damage fields to describe both tensile and shear cracks. The method is extended to saturated porous media by incorporating the effect of fluid pressure, and is able to well describe the main features of hydromechanical responses and damage processes.
COMPUTERS AND GEOTECHNICS
(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.