Introduction
description
Transcript of Introduction
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IntroductionObjective is to create a field deployable automated CO2 and N2O gas trapping deviceTrapping events occur every four hoursTraps replaced after one monthComponents
Flux ChamberMultiple Sub-chambersDesiccant TrapCO2 Chemical Trap
N2O Molecular Sieve Trap
CO2 Molecular Sieve Trap
Rain-water Drop System
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System Flow Chart
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Part Selection
• Valves– Manual– Solenoid
• Pump– Flow Rate: 130 mL/min
Insert Solenoid valve PIC
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Part Slection
• Servo Mechanism– Motor
• Fan
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Material SelectionMaterials in contact with the gases must be chemically inert and gas impermeable
Outer Casing and Sub-chambersWhite PVC – avoiding the greenhouse effect
Desiccant TrapNafion Tubing
CO2 Chemical Trap304 Stainless Steel TubingCarbosorb
CO2 and N2O Traps 304 Stainless Steel TubingMolecular Sieve 5A
TubingPEEK
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Fabrication
Assembly Criteria – small profile, sturdy, and easy to use
Airtight System Fittings and Adapters
CAD DrawingsMachined in the ME Shop
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Design Visualization
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Electrical control system
o Control of servos, solenoids, circulation fans, pumps
o State machine pertaining phases of device operation operation
o Error checkingo Sensors provide information
about device functionalityo Allows for quick repair,
operation during non critical failures
o Governed by Microcontroller
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Programmable System on Chip (PSoC)
Visual, code-free embedded design
C language base
Manually edit code
CY3214-PSoCEvalUSB
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System PowerDemands of system
Operates unattended for weeks
Hours between samples
Microcontroller very demanding
The external timer
Battery decision
All-Battery.com
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Summary• CO2 and N2O levels will be used
to determine impact of farming• This will facilitate carbon credit
trading on global scale• Profitable to farmers• Reduces waste• Cost of end product is low• Will promote ecologically friendly
farming practices• Questions?