Results 51 to 60 of about 210,641 (265)

The Art of Reception: Field Visits as Microcosms for Development Interventions of Non‐Governmental Organisations in Uganda

Journal of International Development, EarlyView.
ABSTRACT Field visits are common phenomena with non‐governmental organisations in Uganda. During these visits, Ugandan national staff guide visitors on series of meetings and interactions in the field. Following an actor‐oriented approach and drawing on ethnographic data on 14 field visits, this paper understands the field visit as a microcosm for the ...
Caspar Edward Swinkels
wiley   +1 more source

Formulation of a 1D finite element of heat exchanger for accurate modelling of the grouting behaviour: Application to cyclic thermal loading [PDF]

, 2016
This paper presents a comprehensive formulation of a finite element for the modelling of borehole heat exchangers. This work focuses on the accurate modelling of the grouting and the field of temperature near a single borehole.
Al-Khoury, Al-Khoury, Al-Khoury, Al-Khoury, Al-Khoury, Anbergen, B. Cerfontaine, Bathe, Bauer, Bauer, Bayer, Bayer, Beier, Beier, Brooks, Collin, Collin, Courant, Cui, Dai, de Paly, Diao, Diersch, Diersch, Erol, Erol, Erol, Eskilson, F. Collin, Florides, Fossa, G. Radioti, Hecht-Méndez, Hein, Heinrich, Hellström, Hähnlein, Ingersoll, Kummert, Laloui, Lamarche, Lazzari, Lee, Lund, Marcotte, Ozudogru, Ozudogru, Partenay, Philippe, R. Charlier, Rees, Rees, Rybach, Signorelli, Wood, Wooszyn, Yang, Yavuzturk, Zienkiewicz, Zienkiewicz   +59 more
core   +3 more sources

The Glacial Legacy of the Geneva Basin: Morphology and implications of an intricate tunnel valley system revealed from 3D seismic data

Journal of Quaternary Science, EarlyView.
ABSTRACT Like other perialpine basins and glaciated margins, the Geneva Basin in SW Switzerland is characterised by buried tunnel valleys, which are elongated incisions widely attributed to subglacial meltwater erosion beneath continental ice sheets. However, an inclusive understanding of the geological control on the evolution of the glacial landscape
Ovie Emmanuel Eruteya, Emna Meftah, Andrea Moscariello   +2 more
wiley   +1 more source

Numerical Analysis of Inlet–Outlet Leg Barriers in Vertical Borehole Heat Exchangers: A Strategy to Mitigate the Thermal Resistance

Geotechnics
The efficiency of heat transfer through borehole heat exchangers is influenced by the thermal resistances of both the borehole and the surrounding soil. Optimizing these resistances can improve the heat transfer performance and reduce system costs.
Asfia Nishat, Hossam Abuel-Naga
doaj   +1 more source

Assessment of Design Procedures for Vertical Borehole Heat Exchangers [PDF]

, 2015
The use of ground source energy systems is a well-established method to provide low cost heating to buildings, diversify the energy mix and help meeting increasingly stricter sustainability targets.
Keirstead, J, Sailer, E, Taborda, DMG
core  

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

Permafrost and Periglacial Processes, EarlyView.
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

Global sensitivity analysis and uncertainty quantification for design parameters of shallow geothermal systems

Geothermal Energy
To improve the design process of geothermal systems, it is important to know which design parameters particularly affect the performance of the system. This article presents investigations on design parameters for borehole heat exchangers in the shallow ...
Simon Richter, Katrin Lubashevsky, Jakob Randow, Steve Henker, Jörg Buchwald, Anke Bucher   +5 more
doaj   +1 more source

Modeling and Experimental Validation of a Transient Direct Expansion Heat Pump [PDF]

, 2017
Geothermal heat pump technology is currently one of the most interesting technologies used to heat buildings. There are two designs used in the industry: geothermal heat pump using a secondary ground loop and Direct Expansion (DX) ground source heat pump.
Fannou, J. C. (Jean-Louis), Kajl, S. (Stanislaw), Lamarche, L. (Louis), Rousseau, C. (Clément)   +3 more
core   +1 more source

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

Permafrost and Periglacial Processes, EarlyView.
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

Explicit Multipole Formulas for Calculating Thermal Resistance of Single U-Tube Ground Heat Exchangers

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
doaj   +1 more source