Subsystem Build & Test
Table of Contents
Team Vision for Subsystem Level Build & Test PhaseWhat we planned to accomplish
- Demonstrate a well-modeled system that is theoretically functional and approved by our customer according to size, weight, containment, removal mechanisms, and cleanliness.
- Materials will be purchased, and the fabrication of the outer box will be well underway.
What we actually accomplished
- A well-modeled system was created in cooperation with our customer that meets all expectations and customer requirements.
- We reached out to vendors to fabricate our designs due to RIT's inability to weld plastic. We received quotes that exceeded the budget and decided to move forward and purchase the materials to build the system here at RIT.
Design Review Summary
- Determine size dimensions for model with Sarah
- Total feeding area 0.5m2
- Thus, feeding studies will be easily converted to 1m2
- Dimensions determined: 24"x 32.25"
- Require accessibility to the leachate draining area
- open leachate collection
- easy to clean and wipe down
- simple container collection
- Remodel digestate drawer for operational ease
- Two filter assemblies
- Walls to stop drawer from pulling all the way through
- Overflow prevention walls
- Addition of a pupae collection area
- Hole added in the wall
- Crevices added to guide pupae to the collection area
- Simple plastic bag collection
- Additional support for the filter
- Bars under filter to add stability
- Filter is in frame for re-usability
Final Design DrawingsModel of the continuous system during digestate removal:
- A concave lid for larvae containment
- Lid contains a large hole for air
- The leachate collection container sits below the leachate draining ramp
- The entire system sits firmly on a support table
- The compost collection container is below the filter
Transition to the second filter for digestate removal:
- Both sides can be utilized for filtration and digestate removal
- Both sides have identical features
- Must move the composte collection bin
Digestate removal from the front side of the system:
- Similar mechanism to the front side of the system
- The drawer has a stopper on both ends to prevent it from sliding through the system
- It also has a stopper inside the box to prevent it from sliding through the system
- The drawer has four detachable hinges creating two removable pieces
- Allows operator to remove the filtration unit that is not currently in use
- Allows operator to thoroughly clean the filter
- The digestate drawer removes 2 inches of digestate
- It has side walls with a 3 inch clearance so there is no overflow or spills on the operator
- The filter sits withing a metal frame
- The bottom of the frame offers additional support to the filter
- The frame of the filter will have a handle to easily pull the filter out of the system
Pupae collection mechanism:
- Two holes for pupae collection
- Two ramps provided for the pupae on each wall
- Ramps are integrated into the wall
- Whole System - 157.5lbs
- Box - 107.5lbs
- Full Drawer w/o Digestate - 50lbs
- Removable Drawer - 21.5lbs
- Filter - 6.42lbs
- Digestate - 29.26lbs
- Assuming digestate density of 600kg/m3
- Full Drawer w/ Digestate on 1 side - 79.26lbs
Engineering drawings of the main box structure:
Engineering drawings of the drawer structure:
Engineering drawings of the filter system:
- Filter Assembly
- Filter Frame Front
- Filter Frame Long Support
- Filter Frame Rear
- Filter Frame Short Support
- Filter Frame Side
Quotes from VendersWe reached out to multiple venders both local and not local. We received three quotes in return. These quotes are only for the fabrication of the outer box. This does not include the drawer assembly.
Quote from Miller Plastic Products, Inc:
- $5,028.00 for Clear Lexan Polycarbonate
- $1,686.00 for Grey PVC
- $1,135.00 for polypropylene
- No specified delivery time
Quote from Faro Industries, Inc in Rochester:
- $2,497.00 delivery time of 3-4 weeks
- $1,658 for acrylic with a lead time of 6-8 weeks.
Purchasing and Pricing
Link to our main body and drawer Purchasing and Pricing.
Bill of Materials (BoM)
Link to updated BoM.
Test Results Summary
During this phase we built a scale model of the system. We built this model to get an idea of the overall size and whether it could fit through a door. Our results can be seen below:
Risk and Problem Tracking
Link to updated Problem Tracking.
Link to updated Risk Management.
Link to updated Gantt Chart for Phase 3.
Team plans for next phase
Three Week Plans
- Ryan's Three Week Plan.
- Erinne's Three Week Plan.
- Taylor's Three Week Plan.
- Anton's Three Week Plan.