1. Toteable, Potable Water A2 Nate Barbera Katie Kimar Ryan Reis Connie Slaboch

2. Design Status Human input: bike pedals Chain Vacuum pump Polluted water container Condensing chamber Cross-section of condensing chamber Stationary Rotating Shaft Friction disc schematic Gearing Vertical rotating shaft HEAT

3. Last Week’s Items 1. Gather vacuum and boiling data Ran two boiling experiments Ran two boiling experiments Test #1 200 mL water 150 Watts 646 mm Hg start temp = 25 C after 6 minutes, temp started increasing after 7-8 minutes, temp boiling at 94 CTest #1 200 mL water 150 Watts 646 mm Hg start temp = 25 C after 6 minutes, temp started increasing after 7-8 minutes, temp boiling at 94 C Test #2 200 mL water 100 Watts 651 mm Hg start temp = 29 C after 7 minutes, temp started increasing boiling temp = 93 C end pressure 593 mm HgTest #2 200 mL water 100 Watts 651 mm Hg start temp = 29 C after 7 minutes, temp started increasing boiling temp = 93 C end pressure 593 mm Hg

4. Last Week’s Items (continued) 2. Develop Gearing Design Talked with Dr. Stanisic Talked with Dr. Stanisic Bevel gears or twisted beltBevel gears or twisted belt Twisted belt is preferred because of fewer parts and lower cost Twisted belt is preferred because of fewer parts and lower cost Belt must be sufficiently long to twistBelt must be sufficiently long to twist Belt guides may be necessaryBelt guides may be necessary

5. 3. Create Preliminary Heat Transfer Model Talked with Dr. Meng WangTalked with Dr. Meng Wang 1-D model developed1-D model developed Mounting table, friction surfaces, and insulation all considered in model Mounting table, friction surfaces, and insulation all considered in model Assumptions and calculations made Assumptions and calculations made Began development of Pro E Mechanica model of friction disksBegan development of Pro E Mechanica model of friction disks Last Week’s Items (continued)

6. Next Week’s Action Items 1. Begin prototype building Order parts Order parts table, condenser, friction materials, spring, boiling pan, vacuum pump, bevel gears or belttable, condenser, friction materials, spring, boiling pan, vacuum pump, bevel gears or belt 2. Work on embedded intelligence Talk to Mr. Brownell Talk to Mr. Brownell Locate sensors (temperature, pressure, rotation) Locate sensors (temperature, pressure, rotation) 3. Create mounting frame design Choose materials, dimensionsChoose materials, dimensions Determine geometry and how parts will disassemble for packagingDetermine geometry and how parts will disassemble for packaging

7. Show-stoppers  Manufacturing the condensing cone  Load applied to friction surfaces makes pedaling too difficult  Water takes too long to evaporate due to inefficiencies in system

8. Schedule WE’RE ON SCHEDULE!

9. Questions?