Rühaak, W. ; Schätzl, P. ; Diersch, H.-J. G. ; Renz, A. (2008)
A new method for modelling geothermal heat exchangers in shallow aquifer systems.
In: Numerische Grund-Wasser-Modellierung: Konzeption, komplexe Anwendung, Entscheidungsgrundlage, June, 24-25, Graz, Austria
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
A new finite-element algorithm has been implemented in the commercial simulation code FEFLOW®. Borehole Heat Exchanger (BHE) systems are modelled by a set of one-dimensional finite-element representations. BHE form a closed loop system. Therefore, the thermal interaction between the heat pipes to the grout of the borehole and to the surrounding aquifer can be computed by using thermal resistances. The method, which has been published before, is further modified and generalized. Instead of using an iterative/sequential approach we developed a fast non-sequential (non-iterative) method based on a substructure finite-element method, which has been shown superior and robust. It allows the computation of single BHE or arrays of BHE of different sizes and types (single U-shape, double U-shape, coaxial) in a highly efficient and accurate manner. Different model validations are presented showing a good agreement.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2008 |
| Autor(en): | Rühaak, W. ; Schätzl, P. ; Diersch, H.-J. G. ; Renz, A. |
| Art des Eintrags: | Bibliographie |
| Titel: | A new method for modelling geothermal heat exchangers in shallow aquifer systems |
| Sprache: | Englisch |
| Publikationsjahr: | Juni 2008 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Numerische Grund-Wasser-Modellierung: Konzeption, komplexe Anwendung, Entscheidungsgrundlage, June, 24-25, Graz, Austria |
| URL / URN: | http://www.lysimeter.com/tagung2008/Tagungsband_GWM08.pdf |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | A new finite-element algorithm has been implemented in the commercial simulation code FEFLOW®. Borehole Heat Exchanger (BHE) systems are modelled by a set of one-dimensional finite-element representations. BHE form a closed loop system. Therefore, the thermal interaction between the heat pipes to the grout of the borehole and to the surrounding aquifer can be computed by using thermal resistances. The method, which has been published before, is further modified and generalized. Instead of using an iterative/sequential approach we developed a fast non-sequential (non-iterative) method based on a substructure finite-element method, which has been shown superior and robust. It allows the computation of single BHE or arrays of BHE of different sizes and types (single U-shape, double U-shape, coaxial) in a highly efficient and accurate manner. Different model validations are presented showing a good agreement. |
| Zusätzliche Informationen: | Date: June 2008, 24-25, City: Graz, Nation: Austria |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Angewandte Geothermie |
| Hinterlegungsdatum: | 16 Nov 2015 08:59 |
| Letzte Änderung: | 03 Jun 2018 21:26 |
| PPN: | |
| Sponsoren: | UniGraz, Das Land Steiermark, competence pool water, Joanneum Research |
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