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Determination of the thermal conductivity of geological formations and preparation of a suitability map for the application of borehole energy extraction via probes
Book - Report
In order to stimulate the use of borehole energy storage, a first measurement campaign was carried out in 2004 to identify the necessary parameters for the design of a suitability map. For this purpose, 15 of the most common formations in Flanders were measured and mapped.
In order to further develop the insight into the subsurface in Flanders, 10 additional formations were analysed, allowing the suitability map to be further refined to include the use of vertical probes for energy production and storage.
In order to be able to measure these formations as well as possible, the following locations were selected:
- Beernem Formation of Aalter
- Eeklo Quaternary of the Flemish Valley
- Brecht Formation of Lillo
- Ranst Formation of Berchem
- Meise Formation of Lede
- Salt Lion Formation of Tienen
- Borgloon Formation of Borgloon
- Hasselt Formation of Fort-Eigenbilzen
- Bilzen Formation of Bilzen
- Bree Maasgrinden
At each of the locations in the building, a heat conductivity measurement was carried out, which
resulted in the following λ-values:
- Formation of Aalter 2.61 [W/mK].
- Quaternary of the Flemish Valley 2.41 [W/mK].
- Formation of Lillo 2,31 [W/mK]
- Formation of Berchem 1,74 [W/mK]
- Formation of Lede 2.33 [W/mK]
- Formation of Tens 1.99 [W/mK].
- Formation of Borgloon 2.33 [W/mK].
- Formation of Front-Emobiles 1.8 [W/mK].
- Formation of Bilzen 2.47 [W/mK]
- Maasgrinden 2.67 [W/mK]
These measured λ-values, combined with the results of the measurement campaign of 2004, are a good starting point for the design of a BEO-field. The higher this value, the fewer metres of ground heat exchangers are required and the better the heat conductivity is.
In order to further develop the insight into the subsurface in Flanders, 10 additional formations were analysed, allowing the suitability map to be further refined to include the use of vertical probes for energy production and storage.
In order to be able to measure these formations as well as possible, the following locations were selected:
- Beernem Formation of Aalter
- Eeklo Quaternary of the Flemish Valley
- Brecht Formation of Lillo
- Ranst Formation of Berchem
- Meise Formation of Lede
- Salt Lion Formation of Tienen
- Borgloon Formation of Borgloon
- Hasselt Formation of Fort-Eigenbilzen
- Bilzen Formation of Bilzen
- Bree Maasgrinden
At each of the locations in the building, a heat conductivity measurement was carried out, which
resulted in the following λ-values:
- Formation of Aalter 2.61 [W/mK].
- Quaternary of the Flemish Valley 2.41 [W/mK].
- Formation of Lillo 2,31 [W/mK]
- Formation of Berchem 1,74 [W/mK]
- Formation of Lede 2.33 [W/mK]
- Formation of Tens 1.99 [W/mK].
- Formation of Borgloon 2.33 [W/mK].
- Formation of Front-Emobiles 1.8 [W/mK].
- Formation of Bilzen 2.47 [W/mK]
- Maasgrinden 2.67 [W/mK]
These measured λ-values, combined with the results of the measurement campaign of 2004, are a good starting point for the design of a BEO-field. The higher this value, the fewer metres of ground heat exchangers are required and the better the heat conductivity is.
Number of pages: 55
Publication year:2011
Accessibility:Open