2. Objective is to create a field deployable automated CO2 and N2O gas trapping device
Trapping events occur every four hours
Traps replaced after one month
Components
Flux Chamber
Two Sub-chambers
Desiccant Trap
CO2 Chemical Trap
N2O Molecular Sieve Trap
CO2 Molecular Sieve Trap
Rain-water Drop System

4. Valves
Manual
Solenoid
Pump
Flow Rate: 130 mL/min

5. Servo Mechanism
Motor
Fan

6. Outer Casing and Sub-chambers Desiccant Trap CO2 Chemical Trap
Materials in contact with the gases must be chemically inert and gas impermeable
Outer Casing and Sub-chambers
White PVC – avoiding the greenhouse effect
Desiccant Trap
Nafion Tubing
CO2 Chemical Trap
304 Stainless Steel Tubing
Carbosorb
CO2 and N2O Traps
Molecular Sieve 5A
Tubing
PEEK

7. Assembly Criteria – small profile, sturdy, and easy to use
Airtight System
Fittings and Adapters
CAD Drawings
Machined in the ME Shop

9. Control of servos, solenoids, circulation fans, pumps
State machine pertaining phases of device operation
Error checking
Sensors provide information about device functionality
Allows for quick repair, operation during non critical failure
Governed by microcontroller

10. Programmable System on Chip (PSoC)
CY3214-PSoCEvalUSB
Programmable System on Chip (PSoC)
Visual, code-free embedded design
C language base
Manually edit code

11. Operates unattended for weeks
Demands of system
Operates unattended for weeks
Hours between samples
Microcontroller very demanding
The external timer
Battery decision
All-Battery.com

12. 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?