Results 21 to 30 of about 354 (185)
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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STUDY OF BOREHOLE HEAT EXCHANGER HEAT TRANSFER ENHANCEMENT PARAMETERS
Journal of Mathematics, Mechanics and Computer Science, 2022 This paper discusses the study of parameters for improving the heat transfer of a borehole heat exchanger for a ground source heat pump application. The study of efficiency parameters was carried out based on an experimental prototype of a ground source heat pump developed by the authors.
T. Amanzholov +3 more
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Numerical Analysis of Enhanced Conductive Deep Borehole Heat Exchangers [PDF]
Sustainability, 2021 Geothermal energy is a reliable and mature energy source, but it represents less than 1% of the total renewable energy mix. While the enhanced geothermal system (EGS) concept faces technical validation challenges and suffers from public acceptance issues, the development of unconventional deep-well designs can help to improve their efficiency and ...
Theo Renaud +4 more
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Study on the Influence of Borehole Heat Capacity on Deep Coaxial Borehole Heat Exchanger [PDF]
Sustainability, 2022 Based on a semi-analytical model established previously for heat transfer in coaxial borehole heat exchangers, the influences of the heat capacities of different parts of the borehole (fluid, pipes and grout) on the performance of deep coaxial borehole heat exchanger (DCBHE) are analyzed.
Changlong Wang +4 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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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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Advanced Science, EarlyView.Bacterial α‐diversity decreases, but stochasticity and community stability increase across the 15 m‐depth vertical profiles and along the degraded gradient within the active layer. The abundance and interaction of core taxa mainly control community stability in the active and permafrost layers, respectively.
Shengyun Chen +13 more
wiley +1 more source