Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Friction-drive rotary pump system
Status: assembled and tested
Results: one pump achieves 4 GPM, second pump dysfunctional
Crank diaphragm pump system
Status: assembled and tested
Results: 3.2 GPM with ideal pumping conditions at max stroke length
Potential improvements: belt on belt-drive
Power generation system
Status: assembled and tested
Results:
motor must operate above 597.015 rad/s (5701.073 RPM) to charge the 12V battery
operating bike at minimum deliverable travel speed 5.4m/s (12mph) will generate above 12V to charge battery
Accomplishments from Previous Week
Friction-drive rotary pump system
Made and tested new adapter -> failed
Came up with another adapter (sleeve solution)
CAD and machining
Crank diaphragm pump system
Finished CAD
Machined components
Finished assembling system
Cut mounting plate down to size and painted it
Tested for system performance
Power generation system
Machined friction wheel
Machined mounting plates
Assembled system
Tested and verified ability of system to charge battery
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Finish report and webpage-Team
Update poster based on comments-Team
Run test to estimate how long it will take biking at minimum deliverable speed to charge 12V battery-Kyle, Jamie
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Next meeting 6/6
Demo all 3 systems for sponsor
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Meeting 5/31 in person
Friction-drive rotary pump system
Test each rotary pump individually because low flowrate does not make sense
Action: tested each pump individually and believe pump is not being engaged properly to turn vane--> going to adjust mounting plate setup to engage pump better
Crank diaphragm pump system
Make crank wheel out of steel to improve thread strength (aluminum acceptable for prototype)
Action: made steel threading insert
Retaining clip and washer to tighten components on shaft
Action: adjusted set screw for tighter fit
Mounting plate could be made out of lighter material than steel
For future reference, order more than one of components in case of breakage
Power generation system
Test voltage generated by motor when pedaling bike at max speed to make sure it is not on the order of 20V because the charge controller may assume 24V to charge the battery
Action: tested system and verified that pedaling at maximum speed does not generate 20V
Document ALL analysis
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
N/A
Risks and Areas of Concern
Running all 3 systems on the same $30 bike
Will bike hold up for multiple demonstrations Week 10 and poster session?
Resources or Information Required but not Available
Schedule
Meet with instructors for demos-Mon
Present demos to sponsor-Tues
Finish webpage-Fri
Finish report-Fri
Finish poster-Fri
Budget (list amount spent and amount remaining)
Spent: $808.30
Remaining: $1,691.70
Progress on Report and Webpage
Report - 90%
Webpage - 80%