Figure 15.
The line graph plots pressure from 1.50 to 2.20 megapascals against time from 0 to 100 minutes. C H 1, C H 3, C H 4 and C H 5 rise rapidly from about 1.60 megapascals to approximately 2.05 to 2.14 megapascals during phase A, initial pressurisation. During phase B, sealing performance, pressures remain nearly steady, with C H 5 near 2.12 megapascals, C H 3 near 2.10 megapascals, C H 1 near 2.05 megapascals and C H 4 near 2.02 megapascals. During phase C, acceleration phase, all pressures rise. During phase D, steady-state spinning, C H 5 remains near 2.16 megapascals, C H 3 near 2.13 megapascals, C H 1 near 2.11 megapascals and C H 4 near 2.06 megapascals. During phase E, controlled production, the pressures decrease, then partially recover. Phase F follows, with pressures decreasing towards approximately 2.10, 2.08 and 2.00 megapascals for the visible series.Evolution of pressure within the GeoTriax during the commissioning test