Table of Contents
UV-Tube Water Disinfection Project
The mission of this student team is to redesign and further develop a series of point-of-use Ultraviolet (UV) water disinfection devices suitable for use in rural areas of developing nations where other water treatment methods cannot be applied because of their cost, inconvenience, limited availability, or energy requirements. The focus is on South American countries (particularly Venezuela) where safe water and power may not be available. The intent is to enhance a proven concept and make it easier to manufacture, easier to service, more robust in operation, compatible with a variety of regionally available power sources, and more environmentally benign. The team's focus was on the design and manufacture of the device, with less emphasis placed on verification of the disinfection technology.
The need for Water
UV disinfection is a process that inactivates pathogens in the water by exposing them to radiation from ultraviolet light. Ultraviolet light consists of UVA, UVB, and UVC light, which occur at different wavelengths. In sunlight, UVC is almost entirely filtered out by the atmosphere, and it is this range that shows germicidal effectiveness. The ultraviolet light penetrates the cell walls of the organisms and disrupts the cell's genetic material, thus making it impossible for the organisms to reproduce. This makes the water safe for consumption.
UV Tube History
(Photots Courtesy of Sarah Brownell)
Roles and Responsibilities Matrix (open in Excel)
Project Schedule, MS Project file (last update 3/16/07)
Project Schedule, pdf (last update 3/16/07)
Project Budget (open in Excel, last update 3/22/07)
Product Development Process
This outline follows the general product development process presented in the textbook "Product Design and Development" by Ulrich and Eppinger, and the which was followed by the design team.
A Project Readiness Package has been prepared prior to the launch of this project. This PRP is intended to help get the team started with a first draft needs assessment and work breakdown structure.
Customer Needs and Specifications
A Concept Review presentation was given on January 19, 2007 outlining the project work done to this point.
The design process was iterative, where the team first developed an Inital Design. This was presented at the first technical design review on February 16, 2007, but was updated several times throughout the design process based on information gained through engineering analysis, prototyping, and testing.
Eventually, the team arrived at the Updated Design.
Several types of Engineering Analysis were performed on this design to ensure its effectiveness prior to the prototype phases. This analysis includes a UV irradiance model, flow rate justification, life cycle assessment, design for assembly, and solar system sizing calculations.
Prototype ConstructionSeveral prototypes were constructed to test certain building procedures and design features, as well as to be used for formal testing. There was a first generation and second generation prototype, along with another which was used for assembly testing.
Testing and Refinement
A Senior Design I Project Review presentation was given on February 23, 2007, outlining what the team had accomplished during the first quarter of Senior Design, and describing the design at a high level as it stood at that point.
A Prototype Review was conducted on May 4, 2007 to demonstrate the functionality of the prototype and recap testing results.
A Senior Design II Project Review presentation was given by the team at the completion of Senior Design II and the entire project on May 18, 2007.
[Save all files and open using MS PowerPoint.]
Final Team Documents
Device Manual - English - construction, use, maintenance, and repair.
Team MembersThe team consists of seven KGCOE students from different disciplines.
|Student Team Member||Discipline|
|Dr. Jim Taylor||Team Guidefirstname.lastname@example.org|
|Dr. Andres Carrano||Customer/Faculty Consultantemail@example.com|
|Dr. Brian Thorn||Customer/Faculty Consultantfirstname.lastname@example.org|
|Dr. Rob Stevens||Faculty Consultantemail@example.com|
These three sites describe the work done by the Renewable and Energy Appropriate Laboratory at UC Berkely to design a UV-Tube water treatment system:
Guidelines for drinking-water quality From World Health Organization
UV Disinfection Fact Sheet National Drinking Water Clearinghouse Tech Brief: A National Drinking Water Clearinghouse Factsheet, Ultraviolet Disinfection