SLIDE 1
Solar Dehydrator
Sponsored by:
Advisor and sponsor
- Joseph Greene Ph.D.
- Greg Kallio Ph.D.
- Lee Altier Ph.D.,
- College of Agriculture
Solar Dehydrator Sponsored by: Advisor and Sponsor Advisor and - - PowerPoint PPT Presentation
Solar Dehydrator Sponsored by: Advisor and Sponsor Advisor and - - PowerPoint PPT Presentation
Solar Dehydrator Sponsored by: Advisor and Sponsor Advisor and sponsor Joseph Greene Ph.D. Greg Kallio Ph.D. Lee Altier Ph.D., College of Agriculture Team Team 1 William Enos Mechanical Engineering Kris Gilmour
SLIDE 2
SLIDE 3
Team 1
- William Enos
- Mechanical Engineering
Team
- Kris Gilmour
- Mechatronic Engineering
SLIDE 4
Team 2
- Sou Yang
- Mechanical Engineering
Team
- Cortlin St. Pierre
- Mechanical Engineering
SLIDE 5
Background
- 25% of produce wasted
- Extend product shelf life
- Solar convection and resistance heater
- California Food Safety Standards
Background
SLIDE 6
Background Design Changes
SLIDE 7
Background
- Hybrid Design
Design Solution
SLIDE 8
Background
- Moisture Resistant Strip Heater
- User Interface
– Simple to use
Design Solution
SLIDE 9
Background
- CFD
– Fan locations
CFD Analysis
SLIDE 10
Background Drying Analysis
- Fick’s Second Law of Diffusivity
- Diffusivity Assumption (Fall Rate Drying Period)
SLIDE 11
Background Drying Analysis
- Allowable thickness for 30°C, 0.5 m/s
- 5-6 mm
- Drying time for 40°C
- 7.5 hours
SLIDE 12
Background Drying Analysis
2000 4000 6000 8000 10000 12000 14000 0.2 0.4 0.6 0.8 1 1.2
Required Watts Air Velocity [m/s]
Heat vs Air Velocity
40°C Temperature Change 30°C Temperature Change 20°C Temperature Change
- Heater = 1100 [W]
- Solar collector box = 1000 [W]
- Target Temperature = 30°C
- Target Thickness = 5-6 [mm]
SLIDE 13
Team 2 Frame Fabrication
SLIDE 14
Completed Fabrication
SLIDE 15
Design Change
SLIDE 16
Finished Project
SLIDE 17
Background Testing
- Quantitative Specifications
Specifications Target Actual Drying Time < 12 Hours < 12 Hours Temperature Difference Spatially Inside Drying Chamber ±5°F ±5°F Volumetric Flow Rate of Air 530 CFM 400 CFM Batch Weight 50 lbs wet weight sliced tomatoes a day 50 lbs/batch
SLIDE 18
Background Final Budget
$88,566.00 $1,663.18 $2,379.70 $178.12
Engineering Cost Raw Material Purchased Parts Unused Budget
SLIDE 19
Background Sponsors
- College of Agriculture
- Student Learning Fee
- Carriere Family Farm
- Enos Family
- Fleming Services
- Hiway Truck & Trailer Parts
- Willows, CA
SLIDE 20
Reflection
- Merits of the design solution
○ Efficient heat collector ○ Ample drying capacity ○ Horizontal and vertical airflow operation
- Unique problems encountered
○ Project transportation
SLIDE 21
Solutions Achieved
- Axle and hitch implementation
- Modular drying cabinet plate
- Duct
SLIDE 22
Suggestions for the Future
- Non-detachable heat collector
- Hitch location moved to the front
- Two axles
- Weight reduction
- Increased airflow
- Decreased height of the drying cabinet
- Higher output heater
- Durable coating
- Louver-oriented system for the fans
SLIDE 23
Conclusion Conclusion
SLIDE 24