Results 91 to 100 of about 4,593,729 (273)

The legacy of Ngatoroirangi: Maori customary use of geothermal resources [PDF]

open access: yes, 2000
Geothermal activity has always been regarded as a significant traditional resource among Maori communities of the Bay of Plenty, Rotorua and Taupo districts.
Stokes, Evelyn
core  

Optimization of Blasting‑Induced Roof Cutting Parameters in Key Stratum and Its Application in Gob‑Side Entry Retention Technology

open access: yesEnergy Science &Engineering, EarlyView.
This study addresses hard roof coal seam conditions by optimizing key stratum blasting‐cutting parameters through theoretical analysis, numerical simulation, and field tests. It proposes calculation methods for blast hole spacing and delay timing based on stress wave theory, controlling roadway deformation within 35 mm, thereby enhancing resource ...
Qiong Liu, Duanxiang Fu, Hongbin Li
wiley   +1 more source

Integrated evaluation and sustainable development implications of a Cambrian-Ordovician karst geothermal reservoir in the southern Fenwei Graben system, North China

open access: yesFrontiers in Earth Science
Low-to medium-temperature geothermal systems are important geological energy resources for clean heating and carbon-emission reduction, but their development in karst carbonate reservoirs is commonly limited by strong reservoir heterogeneity, uncertain ...
Zining Ma   +7 more
doaj   +1 more source

Optimal Lithium‐Ion Battery—Supercapacitor Energy Storage System Capacity for Off‐Grid Intermittent Renewable Energy Mini‐Grids

open access: yesEnergy Science &Engineering, EarlyView.
Deployment of an aging‐based controller during designing of optimal lithium‐ion battery—supercapacitor (LB‐Sc) hybrid energy storage system (HESS) capacity, in off‐grid IREMGs, improves performance of the LB and reduces its aging rate. Also, annualised cost of the LB‐Sc HESS improves by 33.15% in relation to optimal LB SESS.
Isaac Gwayi   +2 more
wiley   +1 more source

Study on Fluid Pressure in Tubing, Dynamic Stress in Reservoir, and Fracture Propagation Morphology During Variable‐Rate Hydraulic Fracturing

open access: yesEnergy Science &Engineering, EarlyView.
Variable‐rate hydraulic fracturing can induce unsteady flow in the tubing, thereby generating fluctuating fluid pressure near the bottom‐hole reservoir. Dynamic stress is generated in the reservoir under the action of fluctuating fluid pressure and propagates as stress waves.
Zhu Ge, Wang Chaojing, Li Weicheng
wiley   +1 more source

Convergence and Residual Error Analysis of Unsteady MHD Stagnation Flow Over a Cylindrical Surface With Streamline and Isotherm Visualization

open access: yesEnergy Science &Engineering, EarlyView.
The novelty of the current study is that the unsteady MHD Cross nanofluid model is, for the first time, coupled with the melting heat transfer at the stagnation point over a horizontally extended cylinder in a Darcy–Forchheimer porous medium. This work connects complex rheological behaviors and phase‐change phenomena in a unique way, with the only ...
Fahad Maqbul Alamrani   +6 more
wiley   +1 more source

Geothermal Resources Council 1989 Annual Meeting, October 1-5, 1989, Santa Rosa, California [PDF]

open access: yes, 1989
Includes memorandum, program, list of exhibitors, images (list of attendees was excluded, due to its personal information)
Geothermal Resources Council
core   +2 more sources

Effect of geothermal brine properties on silica scaling in enhanced geothermal systems

open access: yes, 2012
Silica scaling in Enhanced Geothermal Systems (EGS) is currently a concern affecting the economic viability of geothermal energy extraction. Knowledge of the effect of brine properties, such as pH and salinity, on silica scaling is essential for the ...
Kuncoro, G.   +5 more
core  

Heterogeneous Exhumation Mechanisms in Neoproterozoic Collisional Metamorphism: P–T Constraints From Pelotas and Punta del Este Terranes, Southern Brazil and Uruguay

open access: yesGeological Journal, EarlyView.
Petrography, thermobarometry, and pseudosection modelling reveal peak metamorphic conditions of 3–7.5 kbar and 520°C–800°C in Tonian‐Cryogenian orthogneisses of the Dom Feliciano Belt. Metamorphic field gradients of 27°C/km–39°C/km and variable exhumation mechanisms support correlation of these units as remnants of a Himalayan‐type Piratini Orogeny ...
Thaiane Niederauer‐Santos   +6 more
wiley   +1 more source

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