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Tab 1. - Overview of CO 2
testing

trix Test and one Hot Matrix Test scenarios were re the data of the Warm and the Hot -Matrix Test
performed: scenarios, the tests were performed similar, fol-
• 100 °C housing temperature lowing the shown principle (Table 2):
• 210 °C housing temperature
• 250°C housing temperature
After static testing, dynamic tests have been per- DGS test results
formed until steady state temperatures, were Plot 1 presents on the next page, that all the
achieved for each test step. steady state temperatures were reached at the
speeds of 27.000 rpm, 28.350 rpm and a 29768
For all tests, the seal gas was heated up to 130 °C, rpm. The seal leakage was low and stable at
measured at both cavity injection ports. To compa- each speed and shows the typical increase in

Static test conditions
• SOP pressure 130 / 114 Barg
• Seal gas injection temperature 130 °C
Dynamic test conditions
• Pressure reduced from SOP to dyn. operating 85 Barg
• Seal gas injection temperature 130 °C
• Operating cavity temperature 100 / 210 °C
• Cavity design temperature 250 °C
Dynamic test sections
Each speed was hold until reaching steady state
temperatures
• Hot start-up simulation up to normal speed 0 ➜ 27.000 rpm
Step 1 0 ➜ 9.000 rpm
• Multiple Start/Stops, with 3 steps Step 2 9.000 ➜ 18.000 rpm
Step 3 18.000 ➜ 27.000 rpm
• Multiple Start/Stops, without steps 0 ➜ 27.000 rpm
• Dynamic test at maximum continuous speed 28.350 rpm
• Dynamic test at trip speed 29.768 rpm Table 2

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