Nanditha's Individual Contribution Page

Fall 2009 Contributions

This semester, I am continuing as a member of the Design Team. The project I have been working on this semester is designing control pieces to shut off flow from the inlet chimneys into the sedimentation tank. The first part of this involved reviewing the coupling script in the MathCAD file "coupling" and fixing the code written to draw the socket diameters.

Once this was changed, I moved on to drawing the piece that would fit into this coupling and stop water from flowing into it. This piece consists of a PVC pipe, a cap to cover the top of the PVC pipe, and a tube extending out of the cap to allow for easy handling and for air to escape. To draw the pipe and the long tube, I used existing information in the pipe database to determine the appropriate inner and outer diameters based on the pipe schedules. The algorithm to draw the cap, however, required a lot of research. I spent a lot of time looking into different types of PVC caps online via McMaster and other resources. I ran into trouble in finding information on the thickness of the cap walls and the inner height of the caps because McMaster would not provide me with the information and was finally able to get the information from Spears Manufacturing. I merged this information into the Pipe Database so that a nominal pipe size now has a cap height and cap diameter associated with it that can be called by the functions CapHeight(NominalPipeSize) and CapDiameter(NominalPipeSize). Now, caps can be drawn at accurate sizes for any pipe size.

The completed script for the control piece in the MathCAD file "ChimneyStops" is now debugged and ready to be reviewed so it can be merged into the general Final Designs\AutoCAD scripts. My next step is designing the caps to control flow between the launder pipe and the exit channel using the Orifice equation.Inlet Chimney stops, system to drain Sed Tank

Summer 2009 Contributions

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