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\begin_layout Title
HFDC
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\begin_layout Standard
Skills required: Fluid Mechanics
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\begin_layout Standard
The HFDC team created a dose controller / flow measurement device that is
 appropriate for higher flow rates than were preciously possible with existing
 AguaClara technologies.
 There are some outstanding analysis and design work for this device before
 it is ready to be fully implemented.
 
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\begin_layout Enumerate
The Type 323 Meter Ball valve has been analyzed and modeled, however, the
 losses within the HFDC tubing and fittings have not been included in the
 model.
 The point where major and minor losses would dominate the flow characteristics
 of the dose controller should be determined before the plumbing can be
 designed.
 After this analysis, minimum tubing sizes and maximum lengths can be recommende
d along with appropriate fittings.
 Once completed, the model can be updated to reflect these constraints.
 The failure point of the valve has yet to be determined.
 If plant head loss is designed for 20 cm, then at 50% capacity, the valve
 will only have 5cm of head available.
 Recording how the valve behaves under this condition is an important considerat
ion.
 In fact, only preliminary data exists on the valve.
 Once the plumbing is decided upon, it will be worthwhile to test the valve
 under a wide variety of “operating conditions.”
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\begin_layout Enumerate
Head loss analysis for the plumbing and further valve validation could be
 an appropriate project for 2 summer interns with some, but not necessarily
 extensive, experience with AguaClara.
 
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\begin_layout Enumerate
Design Team The HFOM design algorithms do not increment to actual National
 Pipe Thread (NPT) sizes.
 This will need to be corrected.
 HFOM length, orifice sizing/spacing need to be determined.
 Because these are constrained by entrance tank dimensions, this would be
 an appropriate project for a sub-team within the Design Team.
 The HFOM has not been coded for the Automated Design Tool.
 
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\begin_layout Standard

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