P07402: UV-Tube Water Disinfection Project
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Generate Product Concepts

Table of Contents

Functional Diagram

A functional diagram was developed to show material and energy input/output. Also through this process, three sub-functions were identified:
Water Input / Filtration
Tube Cavity
Power Systems
public/functionaldiagram.jpg

Initial Concept Development

The team participated in initial concept development, focusing on the three subfunctions identified above. Through branstorming and group discussion, the following ideas were initially developed/considered:
Water Input/Filtration
Tube Cavity
Power Systems

Concept Development Refined

These concepts were further discussed and refined to develop several specific concepts, as shown below categorized by subfunction.

Water Input/Filtration

Both batch and continuous flow were considered for water filtration. Five main concepts were developed:
Terracotta Pot with Sand
Reservoir/Filter
Fast Filtering Mesh
Purchased Bag Filters
Commercial In-Line Filters

Tube Cavity

The driving idea behind the tube cavity concepts was to create a design which facilitates the construction and maintenance of the device. Material selection was also considered. There were two main concepts developed:
Tube with Removable Lid
Frame Support With Cover

Power Systems

There are two sources of power for the device. It may be connected to the grid (in a very similar manner to the current design), or powered from an alternative source. The alternative sources considered are solar and human powered DC generator input.
Power Diagram - Grid
Power Diagram - Alternative

The DC Generator power concept necessitates a mechanical system to transmit mechanical power into the motor/generator. Several concepts were developed, and are listed below.

DC Generator Power Inputs
Fan Turbine
Flywheel - Handcrank
Bike Pedal