Creep Property Characterization of Potential Brayton Cycle ...
Design and manufacturing of a brayton cycle for space application
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Transcript of Design and manufacturing of a brayton cycle for space application
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DESIGN AND MANUFACTURING OF A BRAYTON CYCLE FOR
SPACE APPLICATIONRed Rover
Members:Lee Fuller
Justin MendoncaTrever Pope
Erik SterbentzNathan Bartel
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Presentation OutlineSystem ArchitectureComponent Details
Component Loss Analysis
Tentative Fall Timeline
Discussion Questions
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SYSTEM ARCHITECTURE
One system with valves to compare open to closed systems with or without regeneration.
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Turbine/compressor• A turbine is needed to
convert the fluid’s energy into rotational energy
• For this design, the turbine and compressor share a common shaft
• Blades will be interchangeable allowing for multiple test configurations
• Compressor is required to create a high pressure reservoir
• Both impulse and boundary layer effect type blades will be available for test configurations
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Blade designsBOUNDARY LAYER DRIVEN IMPULSE DRIVEN
• Tesla bladeless turbine utilized the boundary layer effect
• High RPM range• Theoretical High efficiency• Testing of device
• Paddle style impulse turbine
• Effective with moderate efficiency
• Moderate RPM range• Standard small
compressor design
Component Details
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Heat Exchanger• A heat exchanger is required
in a closed cycle to provide a low temperature reservoir
• Open cycle Brayton systems do not require a heat exchanger
• The test apparatus includes both open and close cycles to gather data on each cycle performance
• The annular pipe heat exchanger is one design under development
• Submerging the compressor side cross fitting in an ice bath is another design concept
• Current heat exchanger designs are ideal for bench testing and do not reflect the final design concept
Component Details
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Heater• Heat input is provided to
the test system through a 1000 W heating element
• The heating element is contained within the housing shown to the right
• This drives the heat engine and provides the necessary input energy to extract work from the cycle
Component Details
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Regenerator• The regenerator is an
unnecessary component that increases the efficiency of the cycle
• Currently designs include an annular pipe concept show above, and a single pass shell in tube concept shown below
• Due to the systems low efficiency, the component may be necessary to meet project goals
• When active, turbine exhaust gas is diverted to preheat the compressor exhaust
• After the regenerator, the hot gas enters the heat exchanger or exhausts to the atmosphere
Component Details
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System Integration• To minimize the system’s
complexity, standardized components will be used
• Each pipe fitting will have 1” NPT threads
• Each temperature/pressure tap will have ½” NPT threads
• A common flange piece above will be used in every available location
• Additionally, the turbine and compressor share many common dimensions
Component Details
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Component Analysis• Head loss through each component• Heat loss in each component• Performance of heat exchanger• Efficiency of turbine, compressor and
electric generator.
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Every Tuesday meet with advisorsEvery Thursday team meeting
August 22 - Fall semester beginsSeptember 5 - End detailed design/fabricationSeptember 6 - Begin testingSeptember 30 - Have all purchasing completedDecember 16 - Present final results and report
TENTATIVE FALL TIMELINE
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Discussion Questions• Performance Testing Components:
• Temperature• Pressure• Pressure gauges for high temperature application
• Flow velocity• Volumetric flow rate gauge
• Material Selection• Piping• Heat exchangers• Turbine blade material