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Table 11 Key results when varying annulus with original radii dimensions to 3.s.f

From: Modelling an unconventional closed-loop deep borehole heat exchanger (DBHE): sensitivity analysis on the Newberry volcanic setting

Key results

Original

Case1

Case2

Case3

\({T}_{\text{i}}\;(^{\circ } {\text{C}})\)

11.1

10.9

11.2

11.8

\({T}_{\text{o}}\; (^{\circ } {\text{C}})\)

50.0

48.5

51.8

49.6

\({\Delta} {T}\; (^{\circ } {\text{C}})\)

38.9

37.6

40.6

37.8

\({P}_{\text{i}}\) (MPa)

4.97

5.90

4.87

1.35

\({P}_{\text{o}}\) (MPa)

0.302

0.302

0.302

0.300

\({u}_{{\text{F}}}\) (m/s)

2.48

2.48

2.48

1.41

\({q}_{\text{Th}}\)(MW)

1.46

1.43

1.50

1.45

\({\sigma }_{{A}}\; ({\text{m}}^{2})\)

0.0137

0.00621

0.0291

0.0112

\({\sigma }_{\text{T}}\; ({\text{m}}^{2})\)

0.00201

0.00201

0.00201

0.00354

\({\sigma }_{\text{A}}/{\sigma}_{\text{T}}\)

6.83

3.09

14.5

3.16