Results 51 to 60 of about 467 (182)

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
doaj   +1 more source

Method of Averaging the Effective Thermal Conductivity Based on Thermal Response Tests of Borehole Heat Exchangers

Energies, 2020
This work concerns borehole heat exchangers and their testing using apparatus for thermal response tests. In the theoretical part of the article, an equation was derived from the known equation of heat flow, on which the interpretation of the thermal ...
Aneta Sapińska-Śliwa, Tomasz Sliwa, Kazimierz Twardowski, Krzysztof Szymski, Andrzej Gonet, Paweł Żuk   +5 more
doaj   +1 more source

Permafrost Distribution in the Canadian Rockies: Key Variables Influencing Patch‐Scale Variability

Permafrost and Periglacial Processes, Volume 37, Issue 3, Page 372-390, July/September 2026.
ABSTRACT The spatial distribution of permafrost in mountainous regions is influenced by various factors such as topography, climate, vegetation, and substrate. Despite the existence of comprehensive permafrost maps at national and global levels, they fail to accurately represent the patch‐scale (e.g., < 25 m) permafrost distribution in characteristic ...
Gerardo Zegers, Masaki Hayashi, Pablo A. Mendoza   +2 more
wiley   +1 more source

Regression Analysis on Heat Transfer of U-tube BHE in Ground Coupled Heat Pump

Zhileng xuebao, 2010
In this paper,the numerical simulation is performed on the basis of the model describing heat transfer for single U-tube BHE(Borehole Heat Exchanger),and a single regression analysis and a multiple regression analysis on the heat exchange rate are ...
Chen Xu Fan Rui Long Weiding Ma Hongquan
doaj   +2 more sources

Methods of grout quality measurement in borehole exchangers for heat pumps and their rehabilitation

Geothermal Energy
Methods and instrumentation for measuring grout quality in heat pump boreholes, including the measurement of groundwater flow through boreholes outside partly grouted borehole exchanger pipes, have been developed in the Czech Republic.
Petr Nakládal, Martin Procházka, Viktor Goliáš, Jaromíra Hrdá   +3 more
doaj   +1 more source

Transfer of Low-Potential Heat from a Deep Borehole by Means of a Heat Pipe and Heat Pump

Communications, 2012
The paper presents a design of equipment for the usage of low-potential heat collected from rock in a deep borehole by means of heat pipes (HP) and a description of its realization.
Milan Malcho, Jozef Jandacka, Martin Vantuch, Andrej Kapjor, Stanislav Gavlas   +4 more
doaj   +1 more source

Spatial Variability of Permafrost and Active Layer Thickness in a Forested Hillslope of the Taiga Shield

Permafrost and Periglacial Processes, Volume 37, Issue 3, Page 306-322, July/September 2026.
ABSTRACT Under continued climate warming, understanding present‐day permafrost distribution and the controls on ground thaw are critical for predicting permafrost thaw trajectories and associated implications. This study presents a high‐resolution investigation of permafrost extent and active layer thickness (ALT) across a coniferous forested hillslope
Alana Muenchrath, Christopher Spence, Andrew Ireson   +2 more
wiley   +1 more source

Design implications of ground properties and operating conditions for geothermal cooling in hot-humid and arid regions: A case study of Bahrain

Unconventional Resources
This study assesses the feasibility of geothermal cooling for residential buildings in hot-humid and arid regions, using Bahrain as a representative case.
Dimitrios Mathioulakis, Nikolaos Vasilikos, Christina Georgantopoulou   +2 more
doaj   +1 more source

Performance evaluation on the factors affecting the heat extraction performance of deep coaxial borehole heat exchanger [PDF]

E3S Web of Conferences
Geothermal energy has the characteristics of stability, efficiency, and abundant reserves. Fully developing and utilizing geothermal energy is of great significance for achieving the “dual carbon” goal.
Hu Jian, Mao Xiaowa, Tian Liang, Qin Haozheng, Wang Fenghao   +4 more
doaj   +1 more source

Deciphering Freeze–Thaw Dynamics In Rockwalls: A Novel Approach for High Accuracy Regional‐Scale Modeling

Permafrost and Periglacial Processes, Volume 37, Issue 3, Page 430-448, July/September 2026.
ABSTRACT Using a large and novel array of instruments on five rockwalls in northern Gaspesia, their respective surface energy balances were calculated and their thermal regimes were measured and modeled to depths exceeding the seasonal frost penetration.
Tom Birien, Francis Gauthier
wiley   +1 more source