Results 131 to 140 of about 467 (182)

Integrated coupled assessment of geostorage and geothermal prospects in the oil fields of Upper Assam Basin. [PDF]

Sci Rep
Dutta AJ, Gogoi N, Hussain FZ, Kulkarni SD.   +3 more
europepmc   +1 more source

Performance investigation of a solar-driven cascaded phase change heat storage cross-seasonal heating system for plateau applications. [PDF]

Sci Rep
Gao T, Han X, Shi L, Geng Y, Zhang H, Song T.   +5 more
europepmc   +1 more source

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Borehole heat exchanger with nanofluids as heat carrier

Geothermics, 2018
Abstract This paper presents numerical study on the use of nanofluids to replace conventional ethylene glycol/water mixture as heat carrier in a BoreHole Heat Exchanger. Nanofluids contain suspended metallic nanoparticles: increasing their concentration, in comparison to the base fluid, the thermal conductivity increases and the volumetric heat ...
Carlo Roselli, Maurizio Sasso, Giuseppe Diglio   +2 more
exaly   +2 more sources

Transient heat transfer in a coaxial borehole heat exchanger

Geothermics, 2014
Ground-source heat pumps often use vertical boreholes to exchange heat with the ground. A transient heat transfer model has been developed for a thermal response test on a pipe-in-pipe coaxial borehole heat exchanger. The analytical model calculates the vertical temperature profiles in the fluid flowing through the pipes, which are coupled to the ...
Richard Beier
exaly   +2 more sources

An analysis of heat flow through a borehole heat exchanger validated model

Applied Energy, 2012
Abstract Earth heat exchangers are essential parts of the ground-source heat pumps and the accurate prediction of their performance is of fundamental importance. This paper presents the development and validation of a numerical model for the simulation of energy flows and temperature changes in and around a borehole heat exchanger when a fluid ...
Georgios Florides, Panayiotis Pouloupatis, Paul Christodoulides   +2 more
exaly   +3 more sources

Efficient numerical modeling of borehole heat exchangers

Computers & Geosciences, 2010
This paper presents a finite element modeling technique for double U-tube borehole heat exchangers (BHE) and the surrounding soil mass. Focus is placed on presenting numerical analyses describing the capability of a BHE model, previously reported, to simulate three-dimensional heat transfer processes in multiple borehole heat exchangers embedded in a ...
Rafid Al-Khoury, T. Kölbel, R. Schramedei   +2 more
openaire   +1 more source

Modeling insulated borehole heat exchangers

Environmental Earth Sciences, 2016
In the heating sector, borehole heat exchangers have become popular for supplying renewable energy. They tap into the subsurface to extract geothermal energy for heating purposes. For advanced applications, borehole heat exchangers require insulation in the upper part of the borehole either to meet legal requirements or to improve their performance.
Daniel Otto Schulte, Bastian Welsch, Anke Boockmeyer, Wolfram Rühaak, Kristian Bär, Sebastian Bauer, Ingo Sass   +6 more
openaire   +1 more source

Theoretical Model of Borehole Heat Exchanger

Journal of Energy Resources Technology, 2004
The paper deals with the possible use of existing oil wells for geothermal energy production. A mathematical model, describing the process of exploitation of a borehole heat exchanger, has been worked out. It was used for determining energy efficiency, employing the main parameter, i.e., flow of produced heat energy.
Tomasz Śliwa, Andrzej Gonet
openaire   +1 more source

Heat exchange of a borehole with frozen rock

Journal of Engineering Physics and Thermophysics, 1998
We present a method for calculating the heat exchange of a borehole with the surrounding frozen rock in the presence of solid deposits on the inner walls of the raising column of the borehole.
N. G. Musakaev, V. Sh. Shagapov
openaire   +1 more source

Geotechnical considerations in the design of borehole heat exchangers

Canadian Geotechnical Journal, 2021
The use of ground source heat pumps to transfer heat to and from the ground via borehole heat exchangers (BHEs) is among the most energy efficient techniques for space heating and cooling. Broader applications in urban environments require more careful evaluation of hydro-mechanical behavior of soil to ensure their reliable long-term performance and ...
Zymnis, Despina Maria, Whittle, Andrew J.   +1 more
openaire   +1 more source