“UV Tube” Water Disinfection P07402 Project Review 23 February 2007 Sponsored by Dr. Andres Carrano and Dr. Brian Thorn of the KGCOE ISE Department

KGCOE Multidisciplinary Sr. Design 2 P07402: UV Water Disinfection Project Anna Murray Project Management (ME) Miguel Bazan Design for Manufacture (ISE) Micah Brewer Material Selection, CAD (ME) Manaal EisaLife Cycle Assessment (ISE) Gregory Hupp Product Testing, CAD (ME) Robert NorquestFluids Analysis (ME) Brendan Richard Electrical Design (EE)

KGCOE Multidisciplinary Sr. Design 3 Project Motivation 1 in 6 people in the world lack access to “improved” drinking water source Water borne illness claims the lives of 1.7 million people annually (World Health Organization)

KGCOE Multidisciplinary Sr. Design 4 Project Description Point-of use device used to disinfect water using exposure to UV radiation –Target user: residents rural areas of developing countries (Venezuela) Building upon a current design

KGCOE Multidisciplinary Sr. Design 5 Issues of Current Design Accessibility of bulb for repair Difficult to manufacture –Rolling/drilling stainless steel Leakage Water turbidity No safety design

KGCOE Multidisciplinary Sr. Design 6 High Level Customer Needs / Specifications –Safe and effective –Built by the users with local materials –Easier to service –Compatible with a variety of regionally available power and water sources –Inexpensive to manufacture –UV dose > 400 J/m 2 –User not exposed to UV light –Time to disassemble < 10 minutes –AC and optional alternative power source Less than $100 The intent is to enhance a proven concept and make it: - Built with basic tools

KGCOE Multidisciplinary Sr. Design 7 Functional Diagram energy materials infected water sediment Grid (AC) Alternative Power UV Bulb Disinfect water Disinfected Water Filter water Sediment, dirt Water input sources Water flow through cavity

KGCOE Multidisciplinary Sr. Design 8 Selected Design Concept Stainless steel channel with removable wooden lid sand pre-filter Bag filter in reservoir DC Generator to 12 volt battery

KGCOE Multidisciplinary Sr. Design 9 Design Concept: Tube Detail

KGCOE Multidisciplinary Sr. Design 10 Technical Risks / Early Prototyping Material workability –mitigation: constructed prototypes with different configurations for tube cavity Effectiveness of sand filter –mitigation: preliminary tests with different cloths and depths of sand prove that it reduces turbidity Alternative power source –further researched, and decided to pursue solar panels instead of DC Generator

KGCOE Multidisciplinary Sr. Design 11 Current State of Design (AC System) Filter system Safety switch / valve Water input Water output Open-top stainless steel tube

KGCOE Multidisciplinary Sr. Design 12 Current State of Design Filter system: sand pre-filter and bag filter in reservoir UV Bulb Electrical ballast

KGCOE Multidisciplinary Sr. Design 13 Design Review Summary Design IssueProposed Mitigation

KGCOE Multidisciplinary Sr. Design 14 Summary of Design Improvements Tube removable lid Safety switch Filter system Alternative power source

KGCOE Multidisciplinary Sr. Design 15 Current Phase of Product Development Process Planning System Level Design Detailed Design Testing and Refinement We Are Here Phase 0 Phase 1 Phase 2 Phase 3 Concept Development x Phase 4

KGCOE Multidisciplinary Sr. Design 16 Current State of Design Design meets all customer needs Design meets engineering specifications for system except material cost ($126) –Mitigations: test for alternative tube materials (aluminum), re-evaluate wooden structure On target to meet project budget of $2000

KGCOE Multidisciplinary Sr. Design 17 Testing Plans Water turbidity / Filter effectiveness Water Testing –Aluminum/UV interaction –Pathogen removal Flow rate determination Electrical testing –Solar collection –AC and DC input power

KGCOE Multidisciplinary Sr. Design 18 Schedule Milestones for Senior Design II March 2: Test set-up for aluminum samples w/UV March 23: Finalize system design, order parts Technical Review March 30: Construct alpha prototype April 6: Draft product manuals (assembly, use, repair) April 13: Complete preliminary product testing April 27: Build Beta prototype with design improvements and test as necessary May 11: Complete design history file, conference paper, project poster Design Review May 18: Project Review Presentation

KGCOE Multidisciplinary Sr. Design 19 Budget

Questions? Photos courtesy of Sarah Brownell