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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]).