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Bi-Directional Flow Control Valve

Bi-Directional Flow Control Valve. Team 9 Dale Bernier Judy Biddle Timothy Brown Christopher "Robby" Freeborn-Scott 8 April 2010. Brief Overview. Background Problem/Objective Design Selection Specifications/Cost Calculations Manufacturing Testing. Introduction & Background.

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Bi-Directional Flow Control Valve

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  1. Bi-Directional Flow Control Valve Team 9 Dale Bernier Judy Biddle Timothy Brown Christopher "Robby" Freeborn-Scott 8 April 2010

  2. Brief Overview • Background • Problem/Objective • Design Selection • Specifications/Cost • Calculations • Manufacturing • Testing

  3. Introduction & Background September 11, 2001 Pentagon Attack http://upload.wikimedia.org

  4. Wet Pipe Sprinkler System Hangers Cross Main Riser Waterflow Alarm Branch Lines Check Valve Automatic Sprinkler Heads Fire Department Connection Alarm Valve Post Indicator Valve Main Control Valve Main Drain Inspector’s Test Valve Distribution Main

  5. Problem • Currently, only one-directional mechanical flow valves are available on the market

  6. Objective Design and prototype a purely mechanical bi-directional flow control valve

  7. Single Riser Schematic Fire Area -only the sprinkler heads affected by the fire will activate Riser

  8. Double Riser Schematic Valve to be installed in a looped sprinkler system. Riser Riser

  9. Bi-Directional Flow Control Valve Schematic Sprinkler Head Bi-Directional Flow Control Valve Spacing of control valve determined by sprinkler system designer

  10. Design Concepts 5 Design concepts originally developed Chosen Design

  11. Design Selection

  12. Assumptions • Gravitational effect neglected • Spring constants same • Initial velocity is zero

  13. Calculations Sample Calculation for Required Spring Constants the spring rate required for 60 gpm flow Also solved for 70, 80, 90, & 100 gpm

  14. Calculations

  15. Free Body Diagram Valve Open

  16. Free Body Diagram Valve Pressures

  17. CFD Modeling Computational Fluid Dynamics www.comsol.com

  18. Pressure Profile at Instant of Break

  19. Velocity Profile at Instant of Break

  20. Cost Analysis Total Spent on parts: $290.77

  21. Parts Ordered E-Clips O Rings Shafts/casing Springs Rubber

  22. Cost Analysis Original Parts Cost Estimate: $141.70 Initial Purchase Parts Actual Cost: $165.73 Additional Parts Ordered: $125.04 Total Cost: $290.77 Budget: $1000.00 - $290.77 (Parts Ordered) - $250.00 (Machining Cost)Budget Remaining: $459.23 Does not include testing apparatus (fire pump, flow meters, and valves)

  23. Cost Benefit • Sprinkler system cost between $1-5 million • With valve: $2000-$10,000 additional cost to sprinkler system installation • Without bi-directional flow control valve • Same protection is to install duplicate system

  24. Machined Parts

  25. Machining • Shaft-Holders machined using Water Jet

  26. CNC LatheComputer Numerical Controlled • Specialized machining done by others www.sj-mc.com

  27. Testing Apparatus Test water supplied by Fire Hydrant CU’s used to quickly flip the flow fuse GV1 used to throttle the system BV – Ball Valve FM – Flow Meter PI – Pressure Gage CU – Union GV – Gate Valve test room location Fire Hydrant 100gpm. 110psi PI PI 2 1 3” hose 1 ¾ ” hose Test Valve BV 1 FM 1 CU 1 CU 2 GV 1 Fire Department Gate Valve Materials for test apparatus supplied by sponsor

  28. Test Apparatus Assembly

  29. Testing

  30. Testing Results • Several test sessions conducted • Valve is working • however not at desired flow rates • Pressure drop found to be 20 psi at 39 gpm • Shaft holder broke • Remanufactured out of stainless steel • Stronger springs ordered • Additional testing planned

  31. Valve Installed in System

  32. Conclusion Discussed: • Background • Problem/Objective • Design Concept • Cost/Budget • Calculations • Testing

  33. Special Thanks • Dr. Steven Van Sciver • Dr. Daudi Waryoba • Mr. Vaughn Williams • Mr. Keith Larson • Cody Epperson • Tallahassee Fire Training Center

  34. References • McMaster.com • Fundamentals of Thermal-Fluid Science (3rd edition). By Robert Rizza, Prentice Hall, Inc., 2004 • http://upload.wikimedia.org/wikipedia/commons/d/d2/The_Pentagon_US_Department_of_Defense_building.jpg • www.comsol.com • www.sj-mc.com

  35. Questions?

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