Results 51 to 60 of about 354 (185)

The deeper the better? A thermogeological analysis of medium-deep borehole heat exchangers in low-enthalpy crystalline rocks

Geothermal Energy, 2022
The energy sector is undergoing a fundamental transformation, with a significant investment in low-carbon technologies to replace fossil-based systems. In densely populated urban areas, deep boreholes offer an alternative over shallow geothermal systems,
Kaiu Piipponen, Annu Martinkauppi, Kimmo Korhonen, Sami Vallin, Teppo Arola, Alan Bischoff, Nina Leppäharju   +6 more
doaj   +1 more source

Global Comparison of Aqueous Geochemistry and Dissolved H2/CH4 in Continental Low Temperature Serpentinization–Influenced Environments

Hydrological Processes, Volume 40, Issue 3, March 2026.
Conceptual diagram of hydrological and geochemical processes within the Santa Elena Ophiolite, Costa Rica. It highlights watershed cross‐sections, soil genesis, hyperalkaline Type II waters (pH > 11.6) with calcite crust and trapped H2/CH4 gases, seepage into surface waters, storm‐impacted stream profiles, weathered vs.
Alexandra May, Ricardo Sánchez‐Murillo, Matthew O. Schrenk, Esteban Gazel, J. Maarten de Moor, Christian Birkel, Xiaoqiang Li, Danelle Carr, María Marta Chavarría   +8 more
wiley   +1 more source

Hydrological and microbial dynamics in an Arctic wastewater infiltration system

Vadose Zone Journal, Volume 25, Issue 2, March/April 2026.
Abstract Passive wastewater treatment systems are widely used in the Arctic, but studies addressing the vadose zone dynamics that influence the operation and performance of subsurface or soil‐based infiltration systems, such as rapid infiltration basins, are rare.
Débora Boratto, Yannan Huang, Lindsay Johnston, Craig Lake, Lauren Somers, Barret Kurylyk, Rob C. Jamieson   +6 more
wiley   +1 more source

Ground Source Heat Pump in Heating System with Electronics Monitoring [PDF]

Journal of Electrical and Electronics Engineering, 2013
The monitoring system is implemented for a ground coupled heat pump in heating/ system. The borehole heat exchangers – which are 150 m long - are filled with a mixture of water and ethilene glycol calledbrine.
NEAMŢU Ovidiu, ROŞCA Marcel, BENDEA Codruţa, CODREAN Marius   +3 more
doaj  

Groundwater Temperature Processes and Patterns: Implications for Stream Thermal Regimes

WIREs Water, Volume 13, Issue 2, March/April 2026.
Shallow groundwater temperatures are controlled by ground surface temperatures and are influenced by climate change and land cover changes. Deeper groundwater temperature is constant year‐round, making it cooler (warmer) in the summer (winter) than surface water, and exhibits a lagged response to surface warming.
Barret L. Kurylyk, Christa Kelleher, Dylan J. Irvine, Hayden A. Tackley, Jason A. Leach, Bethany T. Neilson, Victor F. Bense   +6 more
wiley   +1 more source

THERMAL PERFORMANCES OF VERTICAL GROUND HEAT EXCHANGERS IN DIFFERENT CONDITIONS [PDF]

Journal of Engineering Science and Technology, 2016
This study investigates thermal performance of vertical ground heat exchangers (GHEs) with different inlet water temperatures and borehole depths. The performances of three types of GHEs namely U-tube, double-tube and multi-tube GHEs are evaluated by ...
JALALUDDIN, AKIO MIYARA
doaj  

Frozen Soil Hydrological Processes and Their Effects: A Review and Synthesis

Reviews of Geophysics, Volume 64, Issue 1, March 2026.
Abstract Frozen soils, including seasonally frozen ground and permafrost, are rapidly changing under a warming climate, with cascading effects on water, energy, and carbon cycles. We synthesize recent advances in the physics, observation, and modeling of frozen‐soil hydrology, emphasizing freeze–thaw dynamics, infiltration regimes and preferential flow,
Ying Zhao, Ce Zheng, Alexander Gelfan, Kunio Watanabe, Haojie Liu, Stephanie Wright, Xiaolong Wu, William Quinton, Yi Wang, Shuhua Yi, Yongyong Zhang, Yujie Shi, Wentao Jiao   +12 more
wiley   +1 more source

Relation Between Mean Fluid Temperature and Outlet Temperature for Single U-Tube Boreholes

Energies, 2020
Ground-coupled heat pump (GCHP) systems usually utilize buried vertical heat exchangers, named borehole heat exchangers (BHEs). The accurate design or simulation of a GCHP system requires the calculation of the time-dependent outlet temperature from the ...
Aminhossein Jahanbin, Claudia Naldi, Enzo Zanchini   +2 more
doaj   +1 more source

Borehole Thermal Recovery as a Method for Quantifying Subsurface Permeability

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract The characterization of subsurface hydrologic properties remains a challenge in hydrogeology and geo‐resource applications, especially in fractured or heterogeneous reservoirs. Here, we investigate whether thermal recovery in an open borehole following fluid circulation can serve as an in situ method to estimate permeability and the spatial ...
Ivanakbar Purwamaska, Patrick M. Fulton
wiley   +1 more source

Geochemical Analysis of Diachronous V‐Shaped Ridges and Troughs That Flank the Reykjanes Ridge South of Iceland

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract It is recognized that mantle plumes play a direct role in generating regional uplift and producing immense volumes of basaltic magmatism, both of which can influence paleoclimate. The Icelandic Plume, beneath the North Atlantic Ocean, is of particular importance due to its size and position at a significant paleoceanographic gateway.
Nicky White, Chia‐Yu Tien, Callum Pearman, John Maclennan, Bramley Murton, Expedition 395 Scientists   +5 more
wiley   +1 more source