Results 101 to 110 of about 136,634 (354)
Energies, 2017 The design phase of ground source heat pump systems is an extremely important one as many of the decisions made at that time can affect the system’s energy performance as well as installation and operating costs.
Angelo Zarrella +13 more
doaj +1 more source
Borehole (slurry) mining of coal, uraniferous sandstone, oil sands, and phosphate ore [PDF]
"This paper reviews advances in the art of borehole (slurry) mining made by the Bureau of Mines from 1974 to 1980. The design of a prototype borehole-mining tool (bmt) developed by the Bureau of Mines is presented along with production data, reclamation ...
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Energy Science &Engineering, EarlyView.This study determines the impact critical stress early‐warning indicators for deep soft coal seams: 18 MPa (shallow holes), 20 MPa (deep holes), and 3 MPa/d daily stress change rate, via theoretical, experimental and simulation methods. ABSTRACT The accurate determination of early‐warning indicators for critical impact stress in deep soft coal seams is
Haichen Yin +8 more
wiley +1 more source
Dependence Models of Borehole Expansion on Explosive Charge in Spherical Cavity Blasting
Geosciences, 2019 In geotechnical practice, it is often necessary to improve the properties of soil and rock in which different structures are built. For this purpose, spherical cavity blasting can be applied to expand the borehole.
Denis Težak +2 more
doaj +1 more source
Energy Science &Engineering, EarlyView.Designing 3‐dimensional (3D) horizontal well trajectories is critical for enhancing drilling efficiency in shale reservoirs. This paper proposes an innovative Orthogonal‐Arc Trajectory (OAT) for 3D horizontal wells, which employs a single constant curvature in the curved section.
Jun Zhang, Boyun Guo, Sohail Nawab
wiley +1 more source
Mathematical modelling of thermal and flow processes in vertical ground heat exchangers
Chemical and Process Engineering, 2017 The main task of mathematical modelling of thermal and flow processes in vertical ground heat exchanger (BHE-Borehole Heat Exchanger) is to determine the unit of borehole depth heat flux obtainable or transferred during the operation of the installation.
Pater Sebastian +1 more
doaj +1 more source
Renewable Energies in Kazakhstan: Current Status, Potential, Challenges, and Opportunities
Energy Science &Engineering, EarlyView.Kazakhstan has strong renewable energy potential, with wind as the leading resource and solar and other sources offering additional opportunities. Key challenges include limited infrastructure, investment needs, and grid‐related technical issues. Despite these barriers, renewables can boost economic diversification, enhance energy security, create jobs,
Lyailim Taizhanova +7 more
wiley +1 more source
Temperature response functions (G-functions) for single pile heat exchangers [PDF]
, 2013 Foundation piles used as heat exchangers as part of a ground energy system have the potential to reduce energy use and carbon dioxide emissions from new buildings. However, current design approaches for pile heat exchangers are based on methods developed
Loveridge, F.A. +3 more
core +1 more source
Energy Science &Engineering, EarlyView.Flow characteristics and pressure loss mechanisms of a reverse circulation converter in dual‐wall drill pipes are systematically investigated using CFD and response surface methodology. The results reveal the dominant role of inertial dissipation and provide a predictive framework for optimizing converter design and operational parameters. ABSTRACT The
Mingming Geng +8 more
wiley +1 more source
Laggan : borehole drilling and testing [PDF]
, 2005 A borehole for potential public water supply was drilled at Laggan Bridge in August 2004. The borehole was commissioned by Scottish Water. The project was managed by Mott MacDonald.
O Dochartaigh, B.E.
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