Results 61 to 70 of about 467 (182)

Porosity and Permeability of Very Young Oceanic Crust: Implications for Hydrothermal Circulation at Mid‐Ocean Ridges

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract Porosity and permeability are crucial factors influencing hydrothermal flow in the oceanic crust. This paper provides a comprehensive overview of measurements and estimates of porosity and permeability. Although scientific drilling projects have yielded direct measurements of these properties, available data remain limited, particularly for ...
Weihao Lyu, Michele Paulatto, Carl Jacquemyn, Matthew D. Jackson, Yanghua Wang   +4 more
wiley   +1 more source

Numerical Simulation of Nanofluid Suspensions in a Geothermal Heat Exchanger

Energies, 2018
It has been shown that using nanofluids as heat carrier fluids enhances the conductive and convective heat transfer of geothermal heat exchangers. In this paper, we study the stability of nanofluids in a geothermal exchanger by numerically simulating ...
Xiao-Hui Sun, Hongbin Yan, Mehrdad Massoudi, Zhi-Hua Chen, Wei-Tao Wu   +4 more
doaj   +1 more source

Retrogressive Thaw Slump Morphology and Dynamics in Saline Permafrost in Northeast Greenland

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 7, July 2026.
Abstract Saline permafrost occupies a significant portion of permafrost in the Northern Hemisphere and extends several kilometers inland from the present Arctic coastline. However, its thermal conditions, mechanical degradation and geomorphological impacts are poorly understood.
S. Eppinger, T. H. Lorentzen, M. Angelopoulos, T. Ingeman‐Nielsen, D. A. Rudd, M. Marcer, M. Krautblatter   +6 more
wiley   +1 more source

Stable Water Isotopes Improve Calibration and Flow Path Identification in Integrated Hydrological Models

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract Hydrological models often exhibit equifinality, where different parameter sets produce similar hydrometric outputs but alter internal catchment processes and partitioning. Incorporating new information amongst calibration targets helps narrow the range of viable models.
Omar Ashraf Nimr, Hannu Marttila, Anna Autio, Pertti Ala‐Aho   +3 more
wiley   +1 more source

Multiphysics Monitoring of Capillary, Electrical, and Elastic Responses During Drainage and Imbibition at Reservoir Conditions

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract Capillary pressure‐saturation relationships are crucial for geo‐energy recovery, and increasingly, for environmental applications. However, for reservoir‐relevant pressure and temperature conditions, only limited data sets are available from special core analysis in laboratory (SCAL) studies.
Juliane Kummerow, Erik Spangenberg, Ronny Giese   +2 more
wiley   +1 more source

IMPACT OF GEOTHERMAL GRADIENT ON GROUND SOURCE HEAT PUMP SYSTEM MODELING

Rudarsko-geološko-naftni Zbornik, 2014
ndisturbed ground temperature is one of the most crucial thermogeological parameters needed for shallow geothermal resources assessment. Energy considered to be geothermal is energy stored in the ground at depths where solar radiation has no effect.
Tomislav Kurevija, Domagoj Vulin, Marija Macenić   +2 more
doaj  

Heat Calculation of Borehole Heat Exchangers

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2013
The paper considers a heat calculation method of borehole heat exchangers (BHE) which can be used for designing and optimization of their design values and included in a comprehensive mathematical model of heat supply system with a heat pump based on utilization of low-grade heat from the ground.The developed method of calculation is based on the ...
openaire   +1 more source

Calibration and Uncertainty Quantification for Single-Ended Raman-Based Distributed Temperature Sensing: Case Study in a 800 m Deep Coaxial Borehole Heat Exchanger. [PDF]

Sensors (Basel), 2023
Mazzotti Pallard W, Lazzarotto A, Acuña J, Palm B.   +3 more
europepmc   +1 more source

Optimal sizing of borehole heat exchangers

Strojarstvo : časopis za teoriju i praksu u strojarstvu, 2009
The heat pumps coupled to the borehole heat exchangers (BHE) can serve for heating and/or cooling of buildings. Optimal sizing of BHE is important because of high drilling costs and importance of matching borehole thermal capacity with the capacity of the heat pump.
Ruševljan, Miroslav, Ćurko, Tonko
openaire   +1 more source

A semi-analytical temperature solution for multi-segment deep coaxial borehole heat exchangers

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
A semi-analytical and a finite-difference scheme are presented for the simulation of temperature and the heat transfer in a multi-segment coaxial borehole heat exchanger.
Magnus Wangen
doaj   +1 more source