Table of Contents
Team Vision for System-Level Design Phase
During the systems design phase, we planned to create multiple design options for each subsystem, so that we could develop several prototype options to be tested during the next phase. In our design development, we had to consider the feasibility of each design i.e. locally available materials and ease of construction and use. We also planned on learning more about the system by working with the graduate student to observe testing of the current model. We each set individual goals at the end of the Problem Definition phase that we intend to accomplish by the end of Systems Design.
In addition to completing our team goals and the weekly MSD assignments, we received and reviewed the existing Matlab model with Dr. Stevens to better understand the current system, and we created a Gantt chart to layout a plan for the whole semester.
Current State: Previous designs developed which are functional but not suitable for construction in Haiti.
Desired State: A robust prototype made of area-appropriate materials that is capable of drying moderate amounts of fruit in a few days.
Project Goals: Analyze current designs to identify opportunities to increase both the temperature and airflow within the oven.
The four primary concepts used in our Pugh Chart are shown below.
Although a final design has not yet been selected due to lack of testing, the final design will be constructed similarly to the image below.
Design Review Materials
Link to presentation: Systems Design Presentation
Link to review notes: System Design Review Notes
Plans for Next Phase
- Work on Matlab model to adapt it to our project.
- Heat transfer feasibility analyses on initial collector trial ideas.
- Begin testing collector ideas.
- Continue material research
- Order preliminary testing materials
- Increase air flow: research potential fan ideas for air intake
- Update the Gantt chart to reflect changes in schedule based on feedback from Subsystem Design Review
- Continue to research solar crop dryer alternatives
- Help with testing the solar collector designs
- Research and test various material types
- Determine which materials need to be purchased for testing
- Participate in preparation of subsystem testing and subsystem data collection.
- Contact region expert about availability of specific construction materials in more populated regions.
- Finalize the subsystem idea that we will pursue and begin a final design draft.
- Concept and Architecture Development- Look at Steven’s models
- Look at heat transfer properties for the materials we have in mind.
- Figure out a way to create mechanical seal
- Heat transfer analysis of solar collector concepts
- After analysis, test feasible concepts
- Continued research of available materials in Haiti
- Look into wind powered fan concepts to increase air flow within system