TU Darmstadt / ULB / TUbiblio

Finite element modeling of borehole heat exchanger systems: Part 2. Numerical simulation

Diersch, H.-J. G. and Bauer, D. and Heidemann, W. and Rühaak, W. and Schätzl, P. (2011):
Finite element modeling of borehole heat exchanger systems: Part 2. Numerical simulation.
In: Computers & Geosciences, pp. 1136-1147, 37, (8), [Online-Edition: http://www.sciencedirect.com/science/article/B6V7D-51H1DM5-1...],
[Article]

Abstract

Single borehole heat exchanger (BHE) and arrays of BHE are modeled by using the finite element method. Applying BHE in regional discretizations optimal conditions of mesh spacing around singular BHE nodes are derived. Optimal meshes have shown superior to such discretizations which are either too fine or too coarse. The numerical methods are benchmarked against analytical and numerical reference solutions. Practical application to a borehole thermal energy store (BTES) consisting of 80 BHE is given for the real-site BTES Crailsheim, Germany. The simulations are controlled by the specifically developed FEFLOW-TRNSYS coupling module. Scenarios indicate the effect of the groundwater flow regime on efficiency and reliability of the subsurface heat storage system.

Item Type: Article
Erschienen: 2011
Creators: Diersch, H.-J. G. and Bauer, D. and Heidemann, W. and Rühaak, W. and Schätzl, P.
Title: Finite element modeling of borehole heat exchanger systems: Part 2. Numerical simulation
Language: English
Abstract:

Single borehole heat exchanger (BHE) and arrays of BHE are modeled by using the finite element method. Applying BHE in regional discretizations optimal conditions of mesh spacing around singular BHE nodes are derived. Optimal meshes have shown superior to such discretizations which are either too fine or too coarse. The numerical methods are benchmarked against analytical and numerical reference solutions. Practical application to a borehole thermal energy store (BTES) consisting of 80 BHE is given for the real-site BTES Crailsheim, Germany. The simulations are controlled by the specifically developed FEFLOW-TRNSYS coupling module. Scenarios indicate the effect of the groundwater flow regime on efficiency and reliability of the subsurface heat storage system.

Journal or Publication Title: Computers & Geosciences
Volume: 37
Number: 8
Uncontrolled Keywords: Borehole heat exchanger;FEFLOW;TRNSYS;Borehole thermal energy store
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geothermal Science and Technology
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences
Date Deposited: 06 Nov 2014 13:29
Official URL: http://www.sciencedirect.com/science/article/B6V7D-51H1DM5-1...
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item