Results 21 to 30 of about 369 (185)
Influence of sustainable load imbalance ratio of heat exchanger of medium-shallow borehole
Youqicang pingjia yu kaifa, 2022 The heat exchanger of medium-shallow borehole which have a deeper depth than the traditional ground source heat pump system and can sustain a notable load imbalance ratio and widen the application scope of geothermal energy.
ZHANG Tian'an +5 more
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Energies, 2021 The objective of this work is to analyze a gas injection borehole heat exchanger coupled with a desiccant assisted air conditioning system during cooling and heating operation.
Finn Richter +4 more
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A Model for a Borehole Heat Exchanger Working with CO2
Energy Procedia, 2014 AbstractGround source heat pumps are a valid technology for heating and cooling in residential application, since they allow to have a stable temperature of the heat source/sink by means of ground heat exchangers, generally named as Boreholes. In particular, U- pipe heat exchangers are interesting when working with two-phase fluids, especially during ...
R. MASTRULLO +3 more
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Energies, 2018 Borehole thermal resistance is both an important design parameter and a key performance characteristic of a ground heat exchanger. Another quantity that is particularly important for ground heat exchangers is the internal thermal resistance between the ...
Johan Claesson, Saqib Javed
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Energy Reports, 2022 Developing shallow geothermal energy with borehole heat exchangers helps energy supply and CO2 emission reduction. This paper comprehensively investigates the influencing factors on heat transfer efficiency of a single borehole heat exchanger based on ...
Zongjun Gao +7 more
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Pipe materials for borehole heat exchangers
European Geothermal Congress 2016, 2016 This paper investigates and evaluates alternative options of higher thermal conductivity as borehole heat exchanger (BHE) piping materials, such as mild steel, galvanized steel, various coating options, stainless steel, copper and its alloys, aluminum, titanium, as well as reinforced polymers and other plastic materials including thermally enhanced ...
Mendrinos, Dimitrios +2 more
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Rudarsko-geološko-naftni Zbornik, 2018 Ground temperature at shallow depth (< 50 m) is not stable, nor in space, neither in time, and its behaviour is the result of superimposition of effects of heat pulses of different origin: solar, geothermal and anthropic. The correct assessment of ground
Francesco Tinti +6 more
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Performance of a hybrid ground source heat pump system with open-loop and closed-loop ground heat exchangers [PDF]
E3S Web of ConferencesGround source heat pump (GSHP) systems have gained attention as high-efficiency heat sources because they utilize relatively stable ground temperatures through ground heat exchangers (GHX).
Choi Minyoung +4 more
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Thermal stresses in borehole heat exchangers
International Journal for Numerical and Analytical Methods in Geomechanics, 2015 SummaryThe backfilling materials of borehole heat exchangers (BHE), particularly the grout material, must provide a suitable thermal contact and ensure durability to the induced thermal stresses because of the heat loading. In this paper, the thermal stresses that occurred in BHEs because of heat injection or extraction is investigated with an ...
Erol, Selcuk, François, Bertrand
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Deep Underground Science and Engineering, EarlyView.The graphical abstract illustrates a reconstructed in situ thermo‐hydro‐mechanical (THM) framework in which porosity serves as the central variable linking stress, pore pressure, and temperature to evolving mechanical properties of rocks. Under burial conditions, in situ stress, pore pressure, and temperature jointly govern volumetric strain and ...
Mingyuan Lu +5 more
wiley +1 more source