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Table 1 Layer dimensions and input data of the FEFLOW model

From: Thermal effect of a borehole thermal energy store on the subsurface

Depth Layer number Layer height Hydraulic conductivity Thermal conductivity Volumetric heat capacity Porosity Stratigraphic unit
(m.b.g.s) (m) (m s−1) (W m−1 K−1) (J m−3 K−1) (%)
−2 1 1.6 6.3 × 10−9 2.1 2.2 0.01 Elevated soil
−0.4 2 0.4 6.3 × 10−9 0.8a 0.13a 1.0 × 10−6a Thermal insulation
0 3 1 6.3 × 10−9 1 3 0.02 Anthropogeneous clay
1 4 1 6.3 × 10−9 1 3 0.02
2 5 1 6.3 × 10−9 1 3 0.02
3 6 1 6.3 × 10−9 1 3 0.02
4 7 1 6.3 × 10−9 1 3 0.02 Lower Keuper
5 8 1 6.3 × 10−9 1 3 0.05
6 9 1 1.0 × 10−6 1 3 0.05
7 10 1 1.0 × 10−6 1 3 0.05
9 11 2 1.0 × 10−6 1.5 3 0.05
13 12 4 7.9 × 10−11 1.5 3 0.01
15 13 2 1.0 × 10−6 1.5 3 0.01
16 14 1 1.0 × 10−6 1.5 3 0.01
17 15 1 1.0 × 10−6 1.5 3 0.01
19 16 2 1.0 × 10−6 2.1 3 0.01
23 17 4 1.0 × 10−6 2.1 3 0.02
27 18 4 6.6 × 10−11 2.1 3 0.02 Upper Muschelkalk Künzelsau Beds (mo3)
29 19 2 6.6 × 10−11 2.1 3 0.03
30 20 1 1.0 × 10−6 1.9 2.8 0.03
31 21 1 1.0 × 10−6 2 2.8 0.03
32 22 1 1.0 × 10−6 2 2.8 0.03
33 23 1 1.0 × 10−6 1.8 2.6 0.03
34 24 1 1.0 × 10−6 2 2.6 0.03
35 25 1 1.0 × 10−6 2 2.6 0.03
36 26 1 1.0 × 10−6 1.9 2.7 0.03
37 27 1 1.0 × 10−6 1.9 2 0.03
39 28 2 1.0 × 10−6 2.1 1.6 0.01
43 29 4 1.0 × 10−6 2.1 1.6 0.01
48 30 5 4.0 × 10−11 2.1 1.7 0.02 Upper Muschlkalk Meißner Beds (mo2)
52 31 4 4.0 × 10−11 2 1.5 0.02
54 32 2 6.2 × 10−11 2 1.5 0.01
55 33 1 6.2 × 10−11 2 1.5 0.01
56 34 1 1.8 × 10−11 2.3 1.4 0.01
57 35 1 1.8 × 10−11 2.3 1.4 0.01
58 36 1 1.8 × 10−11 2.3 1.4 0.01
59 37 1 1.0 × 10−5 2 1.6 0.02 Upper Muschelkalk Bauland Beds (mo1)
60 38 1 1.0 × 10−5 2 1.6 0.02
61 39 1 1.0 × 10−5 2.3 1.4 0.02
62 40 1 1.0 × 10−5 2.3 1.4 0.02
63 41 1 1.0 × 10−5 2.3 1.4 0.02
64 42 1 1.0 × 10−5 2.3 1.4 0.02
66 43 2 2.9 × 10−11 2.3 1.4 0.02
70 44 4 2.9 × 10−11 2.3 1.4 0.02
72 45 2 1.0 × 10−4 2 2 0.02 Upper Muschelkalk Crailsheim Beds (mo1)
73 46 1 1.0 × 10−4 1.7 1.5 0.02
75 47 2 1.0 × 10−4 2 1.6 0.02
80 48 5 1.0 × 10−4 2 1.6 0.02
85 49 5 1.0 × 10−4 2 1.5 0.02
90 50 5 1.0 × 10−4 2 1.5 0.02
95 51 5 7.7 × 10−10b 2b 1.5b 0.02b Middle Muschelkalkc
100 52 5 7.7 × 10−10b 2b 1.5b 0.02b
110 53 10 7.7 × 10−10b 2b 1.5b 0.02b
120 54 10 7.7 × 10−10b 2b 1.5b 0.02b
130 55 10 7.7 × 10−10b 2b 1.5b 0.02b
140 56 10 7.7 × 10−10b 2b 1.5b 0.02b
150 57 10 7.7 × 10−10b 2b 1.5b 0.02b
  1. m.b.g.s, meter below ground surface. aOn top of the BTES only; for the remaining area, values are equal to layer 1; bfrom unpublished internal data; cno sample material, stratigraphy has been adopted from Hagdorn and Simon ([1988]).