Results 71 to 80 of about 7,265 (241)

The Role of Underground Salt Caverns in Renewable Energy Peaking: A Review

Energies
To address the inherent intermittency and instability of renewable energy, the construction of large-scale energy storage facilities is imperative. Salt caverns are internationally recognized as excellent sites for large-scale energy storage.
Si Huang, Yinping Li, Xilin Shi, Weizheng Bai, Yashuai Huang, Yang Hong, Xiaoyi Liu, Hongling Ma, Peng Li, Mingnan Xu, Tianfu Xue   +10 more
doaj   +1 more source

Eco‐Efficient in Mediterranean Olive Grove Systems: Insights From a Life Cycle Cost Analysis in Southern Portugal

Business Strategy and the Environment, EarlyView.
ABSTRACT This study assesses and compares the eco‐efficiency of six olive production systems in the Alentejo region, southern Portugal, employing a life cycle costing (LCC) approach directly integrated with a prior life cycle assessment (LCA). Although LCC has been increasingly applied to Mediterranean olive‐growing, empirical research in Portugal ...
Rachel Hermeto de Pádua Souza, Rui Fragoso, Carlos Marques, Anna Irene De Luca   +3 more
wiley   +1 more source

Energy Release Analysis of a Severe Rockburst in a Headrace Tunnel Crossing a Tectonic Stress Zone

Shock and Vibration, 2019
When tunneling in a hard and brittle rock mass within a tectonic stress zone, dynamic failure of rock mass-rockburst may occur. Considering the occurrence of rockburst is generally induced by a sudden release of storage elastic energy, a numerical ...
H. M. Tian, W. Z. Chen, C. S. Ma, D. S. Yang, X. J. Tan   +4 more
doaj   +1 more source

A Geometric Characterization of Steady Laminar Flow

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT We study the steady states of the Euler equations on the periodic channel or annulus. We show that if these flows are laminar (layered by closed non‐contractible streamlines which foliate the domain), then they must be either parallel or circular flows.
Theodore D. Drivas, Marc Nualart
wiley   +1 more source

Investigation of damage impact on stability and airtightness of lined rock caverns for compressed air energy storage

Deep Underground Science and Engineering
The lined rock cavern (LRC) compressed air energy storage (CAES) system is currently regarded as one of the most promising methods for large‐scale energy storage.
Hui Zhou, Shuo Zhao, Yang Gao, Muhammad Usman Azhar, Mingming Hu, Songhua Mei, Feng Xiao, Hongliang Tu   +7 more
doaj   +1 more source

Enhancement of the Plant‐Accessible Phosphate Fraction in Sewage Sludge Ashes by Na+ or K+ Addition Prior to Combustion

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
The addition of Na2CO3 or K2CO3 to sewage sludge prior to combustion leads to the production of ashes containing phosphate in the form of buchwaldite‐like phases (Ca(Na/K)PO4). Compared to conventional sewage sludge mono‐ashes, such Na‐ or K‐ashes show greatly increased P‐solubilities and proved to be potent P‐fertiliser materials in greenhouse ...
Lorenz Bier‐Schorr, Viktoria Gräser, Michael Scherer‐Lorenzen, Peter Hajek, Philipp Kurz   +4 more
wiley   +1 more source

Investigation of parallel joint density thresholds for granite tunnel failure based on physical model experiments and multiscale monitoring techniques

Scientific Reports
Joint density significantly influences the failure modes of hard rock caverns, yet the underlying mechanisms remain poorly understood. This study systematically investigates the impact of parallel joint density on the failure behavior of hard rock ...
Huai-Sheng Xu, Shao-Jun Li, Ding-Ping Xu, Quan Jang, Liu Liu, Min-Zong Zheng, Xu-Feng Liu   +6 more
doaj   +1 more source

Acoustic‐driven surface cleaning with millimeter‐sized bubbles at translational resonance

Droplet, EarlyView.
Time‐lapse visualization comparing bubble trajectories. The top panel (0 Hz) shows a bubble's linear path under no acoustic forcing, while the bottom panel (50 Hz) demonstrates the oscillatory motion induced by acoustic waves at a resonance mode. This mechanism holds promising potential for applications such as surface cleaning.
Yan Jun Lin, Zhengyang Liu, Sunghwan Jung   +2 more
wiley   +1 more source

Experimental Investigation on Hydraulic Fracture Propagation of Carbonate Rocks under Different Fracturing Fluids

Energies, 2018
Deep carbonate reservoirs are rich in oil and gas resources. However, due to poor pore connectivity and low permeability, it is necessary to adopt hydraulic fracturing technology for their development.
Yintong Guo, Peng Deng, Chunhe Yang, Xin Chang, Lei Wang, Jun Zhou   +5 more
doaj   +1 more source

Critical expansion points: Mechanical signs of surrounding rock instability

Deep Underground Science and Engineering, EarlyView.
This study proposes the Rock Bearing‐Expansion Model (RockBEM) with critical expansion points (CEPs) to quantify post‐peak damage stages in deep‐buried rock masses via plane strain compression test (PSCT). CEP hysteresis&interval ratios reveal bearing performance dynamics and failure severity, advancing mechanistic insights into deep underground rock ...
Jiaqi Wen, Chang Deng, Haijun Wang, Lei Tang, Jihong Yu   +4 more
wiley   +1 more source