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During the Fall 2010 semester the CDC team has focused on redesigning the mounting and arrangement of the dose controller in order to make it more accessible and aesthetically pleasing. Instead of being positioned directly above the entrance tank, the team envisions the system's components being mounted on a plywood board on the wall of the plant. The lever arm of the dose controller would then be connected to the float in the entrance tank by a simple pulley system in order to couple the elevations of the orifice and the entrance tank water level. The team has selected parts for the design and constructed a prototype in the lab.
Figure 1. The new CDC will be mounted on a plywood board to make it visually accessible. Note that this schematic does not show the details of the slider assembly or the flow measurement column.
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The majority of the team's time was focused on selecting parts for the proposed CDC arrangement design and constructing a prototype. Our. Details of the design process as well as listings of part details and McMaster-Carr item numbers for all of the relevant components can be found here.
Pre-semester Context and Goals
The Summer 2010 CDC team provided a detailed discussion of the goals of the Fall 2010 semester. The page also provides background and context for the new design features.
Fall 2010
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Task List and Reports
A Detailed Task List was created to lay out the planned research for the CDC team for Fall 2010.
Reflection Report I Report I provides a detailed description of the planned research and what we think is the game plan in order to scale the apparatus.
Reflection Report II Report II provides a sketch of what the improved CDC apparatus will look like (using two chemicals and pulleys to control the entrance tank float)
The Final Report details the design process including specific components used, contains the results of the flow test run with the new orifice cap, and makes suggestions for future work.