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Electro-Osmotic Drag Observations: Current Sweeps and Results from Princeton University Tests

This document presents a series of observations and results from electro-osmotic drag experiments conducted at Princeton University in July 2008. It details current ramps, resistance measurements, and gas flow rates of hydrogen and nitrogen under varying temperatures. Key data include resistance before and after current hold, mass transfer limitations, and voltage versus time profiles during current holding steps. The findings provide insight into the dynamic behavior of electro-osmotic systems, essential for understanding fluid transport mechanisms.

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Electro-Osmotic Drag Observations: Current Sweeps and Results from Princeton University Tests

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  1. Benziger Group Electro-osmotic Drag Observations and Results Monday, July 7 2008 PrincetonUniversity

  2. 06/27/08 – IV Sweep # 1 – T(FC) = 50°C • First ARBIN test with H2 • Current ramp (CR) to 1.8A, followed by current hold (CH): Rint (before CR) = 0.390 Ω :: Rint (after CH) = 0.256 Ω H2 = 410 mL/min :: N2 = 200 mL/min PrincetonUniversity

  3. 06/30/08 – IV Sweep # 1 – T(FC) = 50.8°C • Current ramp to 1.8A, followed by current hold: Rint (before CR) = 0.608 Ω :: Rint (after CH) = 0.359 Ω H2 = 410 mL/min :: N2 = 200 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

  4. 06/30/08 – IV Sweep # 1 – T(FC) = 50.8°C Rint (before CR) = 0.608 Ω :: Rint (after CH) = 0.359 Ω H2 = 410 mL/min :: N2 = 200 mL/min Voltage vs. Time during 1.8 A Current Hold step PrincetonUniversity

  5. 06/30/08 – IV Sweep #2 – T(FC) = 52.1°C • Current ramp to 1.9A, followed by current hold: Rint (before CR) = 0.807 Ω :: Rint (after CH) = 0.367 Ω H2 = 410 mL/min :: N2 = 200 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

  6. 06/30/08 – IV Sweep #2 – T(FC) = 52.1°C Rint (before CR) = 0.807 Ω :: Rint (after CH) = 0.367 Ω H2 = 410 mL/min :: N2 = 200 mL/min Voltage vs. Time during 1.9 A Current Hold step PrincetonUniversity

  7. 06/30/08 – IV Sweep #3 – T(FC) = 51.2°C • Current ramp to 1.9A, followed by current hold: Rint (before CR) = 0.463 Ω :: Rint (after CH) = 1.82 Ω H2 = 410 mL/min :: N2 = 100 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

  8. 06/30/08 – IV Sweep #3 – T(FC) = 51.2°C Rint (before CR) = 0.463 Ω :: Rint (after CH) = 1.82 Ω H2 = 410 mL/min :: N2 = 100 mL/min Voltage vs. Time during Current Hold step PrincetonUniversity

  9. 06/30/08 – IV Sweep #4 – T(FC) = 80°C • Current ramp to 1.2A, followed by current hold: Rint (before CR) = 0.455 Ω :: Rint (after CH) = 0.750 Ω H2 = 410 mL/min :: N2 = 100 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

  10. 06/30/08 – IV Sweep #4 – T(FC) = 80°C Rint (before CR) = 0.455 Ω :: Rint (after CH) = 0.750 Ω H2 = 410 mL/min :: N2 = 100 mL/min Voltage vs. Time during 1.2A Current Hold step PrincetonUniversity

  11. 06/30/08 – IV Sweep #5 – T(FC) = 80°C • Current ramp to 1.9A, followed by current hold: Rint (before CR) = 0.715 Ω :: Rint (after CH) = 1.32 Ω H2 = 410 mL/min :: N2 = 100 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

  12. 06/30/08 – IV Sweep #5 – T(FC) = 80°C Rint (before CR) = 0.715 Ω :: Rint (after CH) = 1.32 Ω H2 = 410 mL/min :: N2 = 100 mL/min Voltage vs. Time during 1.9A short Current Hold step PrincetonUniversity

  13. 07/01/08 – IV Sweep #1 – T(FC) = 78.6°C • Current ramp to 0.6A, followed by current hold: Rint (before CR) = 3.67 Ω :: Rint (after CH) = 0.858 Ω H2 = 410 mL/min :: N2 = 100 mL/min PrincetonUniversity

  14. 07/01/08 – IV Sweep #5 – T(FC) = 78.6°C Rint (before CR) = 3.67 Ω :: Rint (after CH) = 0.858 Ω H2 = 410 mL/min :: N2 = 100 mL/min Voltage vs. Time during Current Hold step PrincetonUniversity

  15. 07/01/08 – RH[C] Temp vs. Time – T(FC) = 78.6°C PrincetonUniversity

  16. 07/01/08 – %RH[C] vs. Time – T(FC) = 78.6°C PrincetonUniversity

  17. 07/01/08 – %RH[C] vs. Time – T(FC) = 78.6°C PrincetonUniversity

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