Results 11 to 20 of about 354 (185)

Geothermal power based ULTDH for cooling and heating purposes [PDF]

E3S Web of Conferences, 2019
Ultra-low temperature district heating systems facilitate use of waste and renewable heat sources. The article presents a possible scheme of operation and optimisation of small ultra-low temperature district heating system consisting of waste heat source,
Ciapała Bartłomiej, Janowski Mirosław
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Investigation of the Heat Transfer Performance of Multi-Borehole Double-Pipe Heat Exchangers in Medium-Shallow Strata

Energies, 2022
Just as the double-pipe heat exchanger is being utilized in an increasing number of applications, its research content is also deepening. For this paper, based on the air-conditioning cold and heat source project of a building in Handan, Hebei Province ...
Wenjing Li, Wenke Zhang, Zhenxing Li, Haiqing Yao, Ping Cui, Fangfang Zhang   +5 more
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Dynamic and Static Investigation of Ground Heat Exchangers Equipped with Internal and External Fins

Applied Sciences, 2020
Using fins on the inner and outer surfaces of pipes is one method to improve the heat transfer rate of ground heat exchangers (GHEs), thereby reducing the borehole depth and construction and operation costs.
Atefeh Maleki Zanjani, Kobra Gharali, Armughan Al-Haq, Jatin Nathwani   +3 more
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Research on Fresh and Hardened Sealing Slurries with the Addition of Magnesium Regarding Thermal Conductivity for Energy Piles and Borehole Heat Exchangers

Energies, 2021
Currently, renewable energy is increasingly important in the energy sector. One of the so-called renewable energy sources is geothermal energy. The most popular solution implemented by both small and large customers is the consumption of low-temperature ...
Tomasz Sliwa, Tomasz Kowalski, Dominik Cekus, Aneta Sapińska-Śliwa   +3 more
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Drilling Deeper in Shallow Geoexchange Heat Pump Systems—Thermogeological, Energy and Hydraulic Benefits and Restraints

Energies, 2023
In the last decade, due to climate change concerns and new environmental regulations in the EU, there was a tremendous rise in installed heat pump systems in new homes and buildings.
Tomislav Kurevija, Marija Macenić, Martina Tuschl   +2 more
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The analysis of long-term borehole heat exchanger system exploitation

Computer Assisted Methods in Engineering and Science, 2017
The key issue in designing borehole heat exchangers (BHE) is the long-term performance of the ground source heat pump (GSHP) systems. The performance directly reflects economic profitability and depends on a large number of parameters including rock ...
Marek Jaszczur, Tomasz Śliwa
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An Analytical Model for Transient Heat Transfer with a Time-Dependent Boundary in Solar- and Waste-Heat-Assisted Geothermal Borehole Systems: From Single to Multiple Boreholes

Applied Sciences, 2021
With the increasing engineering applications of geothermal borehole heat exchangers (BHEs), accurate and reliable mathematical models can help advance their thermal design and operations. In this study, an analytical model with a time-dependent heat flux
Mohammed A. Hefni, Minghan Xu, Ferri Hassani, Seyed Ali Ghoreishi-Madiseh, Haitham M. Ahmed, Hussein A. Saleem, Hussin A. M. Ahmed, Gamal S. A. Hassan, Khaled I. Ahmed, Agus P. Sasmito   +9 more
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Simulation-Based Comparison Between the Thermal Behavior of Coaxial and Double U-Tube Borehole Heat Exchangers

Energies, 2019
In this study, the thermal behavior of the coaxial and double U borehole heat exchangers was investigated using numerical simulations in both the long- and short-term.
Davide Quaggiotto, Angelo Zarrella, Giuseppe Emmi, Michele De Carli, Luc Pockelé, Jacques Vercruysse, Mario Psyk, Davide Righini, Antonio Galgaro, Dimitrios Mendrinos, Adriana Bernardi   +10 more
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A New Method Based on Thermal Response Tests for Determining Effective Thermal Conductivity and Borehole Resistivity for Borehole Heat Exchangers

Energies, 2019
Research on borehole heat exchangers is described on the development of a method for the determination, based on thermal response tests, of the effective thermal conductivity and the thermal resistivity for borehole heat exchangers.
Aneta Sapińska-Sliwa, Marc A. Rosen, Andrzej Gonet, Joanna Kowalczyk, Tomasz Sliwa   +4 more
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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, WANG Ruifeng, WANG Fenghao, CAI Wanlong, ZHOU Cong, LIU Boyang   +5 more
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