1 Toteable, Potable Water Group A2: Nate Barbera Katie Kimar Ryan Reis Connie Slaboch Critical Concept Design Review 11/28/2006

2 Today we’ll cover….  Project Overview  Initial Design  Technical Challenges  Final Design  Prototype Demonstration  Results & Lessons Learned

3 Outline  Project Overview  Initial Design  Technical Challenges  Final Design  Prototype Demonstration  Results & Lessons Learned  Project Overview

4 Project Overview  ASME Design Competition  Energy is input from a linkage or mechanism driven by human effort.  It should be small enough to be easily stored or transported for emergency use.  It should be easily assembled from its stored configuration  Collaboration  World Health Organization  FEMA, Red Cross  In-house specialists  Budget - $480

5 Project Overview (Cont’d)  Target Market  Emergency Situations  Individuals/Families  Emergency Services  Design Goals  ASME Competition  < 40 lbs  Minimize Assembly Time  Design Relevance  Cheap  Durable  Corrosion-resistant design

6 Outline  Project Overview  Initial Design  Technical Challenges  Final Design  Prototype Demonstration  Results & Lessons Learned  Initial Design

7 Initial Design  Chosen Concept  Friction heat source  Condensing Cone  Bicycle input  Vacuum  Pros  Direct heat input  Sealed, simple condensation system  Cons  Distilled water contamination  Feasibility of condensing  Feasibility of heat

8 Outline  Project Overview  Initial Design  Technical Challenges  Final Design  Prototype Demonstration  Results & Lessons Learned  Technical Challenges

9 Key Technical Issues  Friction Materials and Spring Selection  Find the appropriate combination of materials  Garolite and semi-metallic brake pads  Identify spring and required normal force  80 lbf normal force  Influence of Heat Transfer on Part Design  Determine geometries of frictional disks  Decide on usefulness and extent of insulation

10 Key Technical Issues  Condensing cone feasibility  Consider stresses; heat transfer  Lab experiment setup better able to meet needs  Vacuum Distillation Techniques  Determine appropriate type of pump  Determine vacuum strength, system temperature  Target pressure: 820 mbar  Boiling temperature of approx. 94°C

11 Key Technical Issues  Embedded Intelligence  Temperature sensor  LM35D National Semiconductor sensor  Op-amp used to provide 30 mV/°C output  Pressure transducer  Provide feedback to user to maintain designated pressure  MPX4100AS absolute pressure sensor  Miscellaneous  Driving mechanism for shaft  Drive shaft support  Bike gear mounting  Insulation

12 Outline  Project Overview  Initial Design  Technical Challenges  Final Design  Prototype Demonstration  Results & Lessons Learned  Final Design

13 Final Design

14 Final Design (cont’d)  Bike and chain  Friction Elements  Table  Condenser Glassware  Embedded Intelligence

15 Outline  Project Overview  Initial Design  Technical Challenges  Final Design  Prototype Demonstration  Results & Lessons Learned  Prototype Demonstration

16 Prototype Demonstration

17 Outline  Project Overview  Initial Design  Technical Challenges  Final Design  Prototype Demonstration  Results & Lessons Learned

18 Results & Lessons Learned  WATER WAS DISTILLED!  Boiling water temp = 72ºC  Average pressure = 75 kPa  Key: Pressure Change!  Conclusions  Feasible, but not practical  Improvements  Copper tube  Insulation  Glass  Caulk

19 THANKS Any Questions?