Skip to main content

Science – Society – Technology

Geothermal Energy Cover Image

Table 2 Experiment specifications

From: Thermally driven fracture aperture variation in naturally fractured granites

Type of heating Specimen Test name \(P_{\text{co}\_\text{r}}\) (MPa) Temperature (\(^\circ\)C) Duration (h)
Step-wise heating N14 \(\#\)N14-S1 20 [25, 50, 70, 90, 110, 80, 50, 25] 115
\(\#\)N14-S2 30 [25, 50, 70, 90, 110, 80, 50, 25] 137
\(\#\)N14-S3 40 [25, 70, 110, 140] 83
Constant-rate heating N19 \(\#\)N19-C1 20 [25 \(\rightarrow\) 110 \(\rightarrow\) 25] 92
\(\#\)N19-C2 30 [25 \(\rightarrow\) 110 \(\rightarrow\) 25] 101
  1. All experiments were conducted under a constant back pressure of 15 MPa and a constant flow rate of 0.05 \(\text {cm}^{3}\)/min. \(P_{\text{co}\_\text{r}}\) stands for radial confining pressure