Compilation of data from every stage of experiment.  

This helps tell the story in a complete way and make the data all readily available.

This is for the Celani 1 Cell at the Hunt Utilities Group Research Campus in Pine River, Minnesota.

Name

Description

Data Link

Pre Calibration

Calibration runs from before the actual experiment began.  Both wires were NiChrome.  Some of this data was flawed as we learned how to do it better and better.

Wire Burnout

During an early calibration run we had a wire burn out when it got hot, sagged, and shorted out. Blog: Burned Out  A Wire

Cell1_wire_melt.xls

Formal Start

Installation of Isotan as the control

All Calibrations were done with the same 16 point voltage step program.  The pressures are indicated

Calibration Procedures Doc

Blog:

mid-calibration-data

fast-paced-progress

Cal1

He @ 3.5 Bar

Cal1_USA.csv (3.5 mb)

Cal1_USA.xls (29 mb)

Cal2

He @ 2.0 Bar

Cal2_USA.csv (3.6 mb)

Cal2_USA.xls (31.6 mb)

Cal3

He @ 0.5 Bar

Cal3_USA.csv (3.7 mb)

Cal3_USA.xls (33 mb)

Cal4a

H75%/Ar25% @ 3.5 Bar

Cal4a_USA.csv (3.8 mb)

Cal4a_USA.xls (25 mb)

Cal4b

H75%/Ar25% @ 3.5 Bar - heating with Nichrome

Cal4b_USA.csv (3.6 mb)

Cal4b_USA.xls (37 mb)

Cal4c

H75%/Ar25% @ 3.5 Bar - to compare to 4a

Cal4c_USA.csv (3.6 mb)

Cal4c_USA.xls (36.5 mb)

Cal4d

H75%/Ar25% @ 3.5 Bar - to compare to 4a

Cal4d_USA.csv (3.6 mb)

Cal4d_USA.xls (31 mb)

Cal5

H75%/Ar25% @ 2.0 Bar

Cal5_USA.csv (3.5 mb)

Cal5_USA.xls (20 mb)

Cal6

H75%/Ar25% @ 0.5 Bar

Cal6_USA.csv (3.5 mb)

Cal6_USA.xls (10.7 mb)

Cal7

H @ 3.5 Bar

Cal7_USA.csv (3.6 mb)

Cal7_USA.xls (11 mb)

Cal8

H @ 2.0 Bar

Cal8_USA.csv (3.3 mb)

Cal8_USA.xls (10.2 mb)

Cal9

H @ 0.5 Bar

Cal9_USA.csv (3.5 mb)

Cal9_USA.xls (10.6 mb)

-Installed Celani Wire-

RunHe1

He @ 3.5 Bar - Heating w/ Celani Wire

-Effectively a calibration run with the actual wire presumed unloaded and inactive

Blog: first-run-in-helium

RunHe1_USA_RawData.csv (2.5 mb)

RunHe1_USA.xls (7.6 mb)

RunHe2

He @ 0.5 Bar - Heating w/ Celani Wire

Effectively a calibration run with the actual wire presumed unloaded and inactive

RunHe2_USA_RawData.csv (2.8 mb)

RunHe2_USA.xls (8.4 mb)

Loading1

H @ 3.5 bar Heating w/ Nichrome wire

-Appeared to be successful because wire resistance dropped quickly.

Data divided into 3 data files for usability in a spreadsheet.

Blog:

hydrogen-loading-commenced,

more-loading-data

many-good-tidbits

H2Loading1st12_RawData.csv

H2Loading2nd12_RawData.csv

H2LoadingLast7.5_RawData.csv

Loading -Cool down

H @ 3.5 bar Heating w/ Nichrome wire

-After loading, it was suggested we kill the power quickly and watch how it cools down.  Didn’t notice anything remarkable

many-good-tidbits

Cell_Cool_off.xls

Cell_Cool_off.csv

Loading- Rewarming

H @ 3.5 bar Heating w/ Nichrome wire

-We stepped the power back up and saw the impedance of the wire dropping above 170C, again

running-on-the-celani-wire

rewarm_steps_desc.csv

Run 1

H75%/Ar25% @ 3.5 Bar

With great anticipation we were ready to see it go live.  We stepped the power up, but didn’t see what we were looking for.  The calibration curve was adjusted part way through to accommodate for the denser wrapping than in the calibration.  Files in 3 parts to represent 26 hours at temp.

towards-a-new-calibration-formula

updated-data-columns-and-calibration

review-of-first-11-hours

Run1_usa_1.csv

Run1_usa_2.csv

Run1_usa_3.csv

Reloading

H @ 3.5 bar Heating w/ Nichrome wire

Held at about 170C, no change in impedance

Upped to 230, slight change in impedance.

We were using a calibration based on Cal7.

experiment-steps

reloading.csv

Run He 3

Run in He @ 3.5 Bar heated by loaded Celani wire.  This is to use a very good baseline from RunHe1 to compare against.  It was suggested that the wire may generate heat in He after it was loaded with Hydrogen.

worth-trying

impedance-vs-time-in-3-helium-runs

two-curious-events

Run3He_longer.csv 

24 in 0.5 Bar H

Next it was suggested we run at lower pressures, which may make the wire hotter and limit the hydrogen re-combination and assist in loading.

The test cell was vacuumed down to 1 torr and refilled with Hydrogen at 0.5 Bar.  The calibration was based on the the RunHe1 and Run He2.

starting-the-next-run

stable-run-write-up

24h_0.5BarH_raw_1.csv

24h_0.5BarH_raw_2.csv

24h_0.5BarH_30sec.csv

Mini Sweep

18 small steps through the range of potential loading, focusing on the temps where we have seen resistance drop over time.  Still saw resistance declining at stable temp from 202 to 220C

sweep-of-loading-temps-write-up

mini_sweep_0.5BarH_raw.csv

mini_sweep_0.5BarH_30s.csv

Reloading 2

Targeting about 208 C where the resistance dropped the fastest, in order to see the extent of the possible resistance drop.  In 0.5 bar H2 we spent the afternoon watching the resistance of the wire drop.

reloading.csv

Both Wires

We decided to try to achieve higher temperatures and lower currents in the Celani

wire by running both wires simultaneously.

both-wires-on

sweep-with-both-wire-results

Nov 19

Nooner

An interesting rise is P_xs

attempted-wire-repair

Wire Repair

Noticing that the wire was looking flaky, we tried a procedure recommended by Celani

close-up-pictures-of-the-cell

attempted-wire-repair

Nov 19

Post-Fix Loading

Went through a loading while heating with the NiCr.  The impedance dropped nicely and leveled off.  

loading-complete-on-fixed-wire

Nov 20

Post-Fix Run

In 75%H/25%Ar at 3.5 Bar.  Running significantly below the baseline of the first Helium runs with the Celani wire

Then, after dropping the power, it starts a slow climb up in P_xs.