Introduction
description
Transcript of Introduction
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
System Flow Chart
Part Selection
• Valves– Manual– Solenoid
• Pump– Flow Rate: 130 mL/min
Insert Solenoid valve PIC
Part Slection
• Servo Mechanism– Motor
• Fan
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
Fabrication
Assembly Criteria – small profile, sturdy, and easy to use
Airtight System Fittings and Adapters
CAD DrawingsMachined in the ME Shop
Design Visualization
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
Programmable System on Chip (PSoC)
Visual, code-free embedded design
C language base
Manually edit code
CY3214-PSoCEvalUSB
System PowerDemands of system
Operates unattended for weeks
Hours between samples
Microcontroller very demanding
The external timer
Battery decision
All-Battery.com
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?