Designing and Optimizing a Multistage Hydrogen Pump
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Transcript of Designing and Optimizing a Multistage Hydrogen Pump
Designing and Optimizing a Multistage Hydrogen Pump
Stephanie NobleAdvisor: Professor Benziger
REU Partner: Chelsea Bonetti
Goals and MotivationOptimizing a Hydrogen Pump to Conserve Energy
1. Obtain un-polluted fuel (H2) and pure waste (CO2)2. Prove theoretical high energy efficiencies with multi-
stage design.
WHAT:
WHY:
1. Confirm theoretical performance of previous Multi-Stage Pump.
2. Design and optimize our own Multi-Stage Pump.i. Efficient/Effectiveii. Portableiii. Minimal Energy Loss
Process• Gases Enter
• Hydrogen/Carbon Mix
• Protons Cross Membrane• Electrochemical Pumping Process
• Leftover Gas Exits• In a Multi-Stage pump, these
pass to the next stage.• New CO2/H2 Ratio.
How a Hydrogen Pump WorksA Chemical Perspective
• Single-Stage• Advantages
• High Degree of Separation• Low Temperature
Operation• Acts as a Pump
• Disadvantages• Lower Efficiency• Serpentine flow
• (previous models)
HYDROGEN PUMP
Why a Hydrogen Pump?A Comparison with the Conventional System
It’s Customizable!
0102030405060708090
100
Efficiency of Operation of Hydrogen Pump
Hydrogen Recovery (%)Energy Efficiency (%)
Perc
ent(
%)
• BUT!... Multi-Stage• Same Advantages• Higher Theoretical Efficiency
Assembly of a Hydrogen PumpBrief Procedure
Linear Hydrogen PumpDesign Challenges and Final Product
STRENGTHS:• Durable
• Thorough Mixing• Ease-of-use
WEAKNESSES:• Difficult Screw Insulators
• Weak Luer Locks•Uneven Pressure
Distribution
More efficient than Commercial
Current @ 0.8 V and Pure H2:Our Design: 1.31 ACommercial: ~0.7 A
Our Design: EfficiencyEfficiency, Extent of Separation vs. Voltage
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.90
0.10.20.30.40.50.60.70.80.9
1
00.10.20.30.40.50.60.70.80.91C/H = 0 (Pure H2)
Extent of Sep'nEffi-ciency
Voltage
Exte
nt o
f Se
para
tion
Effici
ency
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.90
0.10.20.30.40.50.60.70.80.9
1
00.10.20.30.40.50.60.70.80.91C/H = 1
Voltage
Exte
nt o
f Se
para
tion
Effici
ency
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.90
0.10.20.30.40.50.60.70.80.9
1
00.10.20.30.40.50.60.70.80.91
CH = 2
Voltage
Exte
nt o
f Se
p'n
Effici
ency
0.35 0.45 0.55 0.65 0.75 0.85 0.950
0.10.20.30.40.50.60.70.80.9
1
00.10.20.30.40.50.60.70.80.91
Commercial (CH = 2)
EfficiencyExtent of Sep'n
Voltage
Exte
nt o
f Se
p'n
Effici
ency
Optimization ParametersCustomizing a Single Unit
Why is there an optimum voltage?• Hydrogen can only cross the membrane so fast
• Limiting diffusion to and across the membrane
What controls where the optimum occurs?• Rate at which Hydrogen contacts the Membrane
• Feed: C/H Ratio, Flow rate
Current vs. Voltage
(Different C/H Ratios)
Data AnalysisAnalytical Program
Set Parameter
s
Set Optimum Values of
Each Stage
Analyze Data
Data AnalysisOptimization Program
• Prepare Program Parameters • Determine desired trends.
• Feed Condition Optimal Voltage• Fit with parameters determined experimentally.
• Design Program• Report Optimal Voltage from Trend• Alter Feed Conditions based on Previous Stages
ConclusionSeparate-Stage Design
• Increased effectiveness, durability, and ease-of use
Program for Multi-Stage Analysis• Observe efficiency/operation of both individual stages and Overall
Process• Separate Program for Optimizing a Single Stage
Confirmation of Theoretical Process
• Observed similar trends• However, more Conclusive Results TBD
• Our Design and Program facilitate future Confirmation
What’s next?
Multi-Stage Hydrogen Pump:The Future of Green Energy
Production
Special Thanks to:Professor Jay Benziger
May Jean CheahEric GauthierXuemei Wu
PRISM/PCCMPEI Grand Challenges
Program