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Thorough research of off-the-shelf orifices has not yet been completed. The Summer 2010 team investigated the use of carburetor jets as metering orifices and these results can be seen on their wiki page. Additionally, orifices can be found in many industrial applications such as paint sprayers, "line coolers" (jets of fluid used to cool parts in an assembly line) and burner jets, to name a few. These will be manufactured under more exacting standards than we could hope to replicate especially in the some of the remote areas where our plants are best suited. One manufacturer that needs further research is Bird Precision, maker of lab-grown ruby orifices. These orifices are impervious to chlorine and can be installed in virtually any style of fitting. Additionally, their orifices are fabricated by piercing a lab-grown ruby cylinder with a laser, followed by drawn wire. This results in the best surface finish possible which may help in mitigating the surface tension issues.
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Once the materials and fittings are decided upon, this information needs to be incorporated into the Automated Design Tool. The goal is for the design tool to eventually include the CDC and to have a material list and AutoCAD drawing of the installation included as part of a standard design package.
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Concluding, this sub-team must improve on the Constant Head Tank design and valve selection so that this device will "scale-up" as AguaClara plants increase in size. Additionally, this sub-team must make final decisions on the materials and fitting styles that will be used in the CDC.
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Design Upgrade of the NDC (3-6 Persons)
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