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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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Benziger Group Electro-osmotic Drag Observations and Results Monday, July 7 2008 PrincetonUniversity
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
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
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
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
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
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
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
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
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
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
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
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
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
07/01/08 – RH[C] Temp vs. Time – T(FC) = 78.6°C PrincetonUniversity
07/01/08 – %RH[C] vs. Time – T(FC) = 78.6°C PrincetonUniversity
07/01/08 – %RH[C] vs. Time – T(FC) = 78.6°C PrincetonUniversity
