Fall Final Presentation
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Transcript of Fall Final Presentation
Auto ACENGR-4020Presenters:
Seth Bowman, Carson Camp, Elizabeth Clarke, Nicholas Tate
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Project Faculty
Dr. O. Hayden GriffinProject SponsorFaculty Advisor
Additional Assistance Provided ByDr. Tarek Abdel-Salam - ReferenceEast Carolina University - Funding
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What is the problem with Auto AC?
Problem Statement:
Current automotive air conditioners are
complicated and take up space within the car.
Description:
This project will produce a new automotive
air conditioner that reduces complexity and
does not use an engine run compressor.
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Key EDS Factors
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Functional PerformanceRemove 18000 BTU’s of heat
Human FactorsAll moving parts self-contained within unit to mitigate dangers
EconomicShould match estimated market price of $1,500
Maintenance, Repair, and RetirementNo less than 25% professionally replaceable/repairable partsAble to be disposed of without special handling needs
PollutionWill not exceed GWP of 1430
Decision Matrix
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Thermoelectric Materials
Governed by the Peltier Effect Typically Made of Bismuth Telluride and CopperUtilize N and P Type Semiconductors
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Small Scale Lab Model
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Thermoelectric Testing
Procedure:3 minute test of Current
Results:60 Watts75 BTU of heat removal
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Car Testing
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Test Vehicle: 2012 Chevy Sonic
Test Software: HPTuners VCMScanner
Test Procedure:
2x 3 minute idle tests
2x 3 minute driving tests
Car Testing - Data
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Comparison of Data
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Assumptions:• Compressor Power Increases Linearly with
RPM• Fuel to electric conversion efficiency of 21%
(engine 40%, belt 98%, alternator 55%)• Manufacturer specified 72W max power
consumption for thermoelectric
Data Comparison - Compressor vs TE
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Development of System
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Design Philosophy- Minimize cost and complexity by reusing existing components wherever possible.
Thermoelectric Implementation
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Components:
1x Aluminum mounting block
2x Tellurex SL1210 TE Units(170 BTU, 120W)
1x Stainless Cooling Pipe
Thermoelectric Assembly
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System Plumbing
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Heater Core Inlet
Heater Core OutletComponents
TE Assembly (1)
1 Quart Reservoir (2)
Electric Fluid Pump (3)
Cooling fluid (Water or
Water/Glycol)(1)
(2)
(3)
System Wiring
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Vehicle Switched 12V
Components
TE Assembly (1)
Switch (2)
Electric Fluid Pump (3)
Fuse Block (4)
2x 15 amp for TE
1x 10 amp for
pump
1x 2 amp for
switch
(1)
(2)
(3)
Vehicle 12V from Relay
Relay
(4)
Economic Analysis
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Recommendations
Install the system in a car currently lacking AC Use the bill of materials and provided drawingsNot recommended to replace compressors
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Conclusions
Good alternative for cars without an air conditioning systemThermoelectrics suitable for mild coolingToo large for most vehiclesCould have more applications as technology advances
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Questions?
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