joel v. madison ebara international corporation cryodynamics division sparks, nv aiche spring...
TRANSCRIPT
![Page 1: Joel V. Madison Ebara International Corporation Cryodynamics Division Sparks, NV AIChE Spring Meeting April 26-30, 2009 Tampa, Florida](https://reader036.vdocuments.net/reader036/viewer/2022062515/56649ceb5503460f949b7119/html5/thumbnails/1.jpg)
SOLVING NEW DEMANDS IN LNG TECHNOLOGY USING
FIELD-PROVEN LNG EXPANDERS AND PUMPS
Joel V. Madison
Ebara International Corporation
Cryodynamics Division
Sparks, NV
AIChE Spring Meeting
April 26-30, 2009
Tampa, Florida
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Biography: Joel MadisonJoel Madison graduated in 1988 with a Master of Science Degree in Aerospace Engineering from the Pennsylvania State University. He joined Ebara International in 1995 after working as a research engineer in the field of hypersonic propulsion in support of NASA’s development programs . He is currently serving as Chief Executive Officer the corporation. In addition to his responsibilities related to corporate management, he is still actively participating in development of novel technologies.
![Page 3: Joel V. Madison Ebara International Corporation Cryodynamics Division Sparks, NV AIChE Spring Meeting April 26-30, 2009 Tampa, Florida](https://reader036.vdocuments.net/reader036/viewer/2022062515/56649ceb5503460f949b7119/html5/thumbnails/3.jpg)
SOLVING NEW DEMANDS IN LNG TECHNOLOGY USING
FIELD-PROVEN LNG EXPANDERS AND PUMPS
Joel V. Madison
Ebara International Corporation
Cryodynamics Division
Sparks, NV
AIChE Spring Meeting
April 26-30, 2009
Tampa, Florida
![Page 4: Joel V. Madison Ebara International Corporation Cryodynamics Division Sparks, NV AIChE Spring Meeting April 26-30, 2009 Tampa, Florida](https://reader036.vdocuments.net/reader036/viewer/2022062515/56649ceb5503460f949b7119/html5/thumbnails/4.jpg)
Overview
Compact Configurations
Tandem Expander
Integrated Expander
Cross-Flow Expander
Cross-Flow Pump
Conclusions
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Compact Pump-Expander:Design Options
Pump & expander separated by a seal
Common shaft Common
motor/generator LNG & MR streams TEM Two-phase
possibility
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Compact Pump-Expander:Design Options Continued
Separate the motor/generator and cool with another available fluid, N2
Thrust balance with third fluid
Two-phase expansion option
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Compact Expander-Expander:Design Options
2 Expanders separated by a seal
Common shaft Common generator LNG & MR streams TEM Two-phase possibility
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Compact Expander-Expander:Design Options Continued
Option to separate the generator and cool with another available fluid, N2
Thrust balance with third fluid
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Compact Designs: Advantages Thrust is minimized due to opposite flow
directions on a common shaftLess fluid is required for thrust balancingThrust balancing using MR streamHydraulic efficiency increases
Cooling motor/generator with MR stream increases process efficiencyHeat transfer to MR stream not LNG
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Compact Designs: Advantages Continued Separating the motor/generator
increases both process and hydraulic efficiencyHeat transfer is absorbed by another fluidThrust balancing achieved with third fluid
Compact Design = small footprint
Easily integrated into existing plants
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Compact Designs: Advantages Continued
Increases electrical efficiency
Construction cost and payback period reduction
Overall increase in plant efficiency
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Tandem Expander:Design Two expanders located
in one vessel Operate in series Accommodate large
head with minimal increase in diameter
Finely tune to optimal operating point
Two-phase possibility
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Tandem Expander:Advantages
Accommodate larger differential pressures without increasing diameter
Allows for multi-phase capacity and replaces both single and two-phase expansion through JT valves
Greater flexibility
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Tandem Expander:Advantages Continued
Constant adjustment to process conditions maintains the best efficiency
Small footprint
Reduction in construction costs
Reduction in machine cost
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Integrated Expander:Concept
Traditional Integrated Expander
JT Bypass Valve
7% Pipe Cooling Leakage Flow
Expander External JT Valve
0% Pipe Cooling Leakage Flow
Expander
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Integrated Expander:Design
Expander and JT operating in parallel inside one vessel
Motorized cross-flow JT valve
Two-phase possibility
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Integrated Expander:Cross-Flow Valve
Cross-flow JT Valve Cross-Flow JT Valve Operation
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Integrated Expander:Advantages
Eliminate required leakage flow to keep bypass cold
Optimize power output for both reduced and overflow conditions
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Optimizing Power Output for Reduced Flow
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Optimizing Power Output for Overflow
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Cross-Flow Expander:Design
Two expanders mounted in one vessel
Separate shafts and generators
Operate in parallel
Cross-Flow valve allows for flow control to both machines
Two-phase possibility
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Cross-Flow Pump:Design
Two pumps mounted in one vessel
Separate shafts and motors
Operate in parallel
Cross-Flow valve between pumps to control flow for both machines
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Cross-Flow Pump:Design Continued
Same design, with the addition of a smaller feeder pump
Feeder pump to increase head and account for height difference between upper and lower pumps
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Cross-Flow Expander & Pump:Advantages
Up to 50% turndown
Maintain high machine efficiency with
turndown
Higher flow capacity
Greater flexibility
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Cross-Flow Expander & Pump:Advantages
Compact footprint
Piping reduction
Minimize construction costs
Maintain reasonable machine diameter
Maintain typical machine cost
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Conclusions
New solutions using proven machinery to provide solutions to new demands in:HeadFlowEfficiencyFlexibilityCompact sizeCost effectiveRetro-fit for older plants