Austin Frazer Eileen Kobal Ana Maria Maldonado Marie Rohrbaugh Moog Gas Evacuation Systems Design Review

The Team  Austin Frazer  Role: Lead Engineer - Analysis  Major: Mechanical Engineering  Eileen Kobal  Role: Lead Engineer – Mixtures of Gas Fluids  Major: Chemical Engineering  Ana Maria Maldonado  Role: Team Manager  Major: Industrial Engineering  Marie Rohrbaugh  Role: Project Manager  Major: Mechanical Engineering

Problem Statement To mass spectrometer UUT High pressure helium Fixturing/leakage similar to other side Fixtures interface between AGT can and UUT Fixture leakage UUT leakage

Current Procedure Our process needs to minimize leakage from fixtures Oring Leakage Diagram

VOC to VOE customer rating Mate with the current software system No extra procedure is required to make the system run The system starts when the test starts Nitrogen moves when the system is told to start <5 sec between start of test and equilibrium Reduce the leakage into the can to 1% of original value No adjustment made to original design <100scc/min of Nitrogen used Maintenance plans provided Training materials provided cost of system is <$10,000 time between maintenance cycles is >30 days FMEA performed training takes <30 min provide accurate test data 10 *** Preserve Vacuum 1 * Reduce delay caused by false failures 7 * * minimize increased cycle time 8 ***** * user safety 12 ** operator understands process 3 * ** system is controlled transparently by the existing software 9 ** minimize cost by balancing initial cost, maintenance cost, and consumable materials 6 ***** * sturdy and robust system 11 ** maximize time between maintenance cycles 4 ** maintenance plans 5 * maintenance can be accomplished with minimal money and time 2 * **

Voice of the Engineer

Design Constraints  Safety  Contamination  Class 10,000 clean room.  All products should comply to a strict cleanliness certification  Existing Fixture  Cannot modify inside of can  Must be attachable to can  Gas Flow  Nitrogen gas at 120psia available  Vacuum at 1psia available

Function Tree

Concept Generation

Pugh Diagram- Move/ Evacuate the Gas Comparison Concept ABCD small centrifugal pump to draw out test gas heating / cooling a reservoir of inert gas to draw out test gas additional mass spectrometer at the vent draws out test gas small vacuum pump alternating drawing down the test gas and pumping with a flush gas Criteria Weight Application elsewhere at Moog10100 Availability of resources Contamination possibility Cost Durability (everyday use) Effectiveness Fits timeline Long term benefits Maintainable Meets space limitations Safety Works transparently with current system

Pugh Diagram- Access the Gas Comparison ConceptABC larger cavity for gas collection modify vent geometry fill vent with a viscous fluid to prevent He from entering have a different o-ring material so that the He doesn't go through CriteriaWeight Application elsewhere at Moog1001 Availability of resources700-7 Contamination possibility900-9 Cost70-77 Durability (everyday use) Effectiveness Fits timeline Long term benefits Maintainable Meets space limitations80088 Safety Works transparently with current system

Block Diagram

Flexline to Nitrogen Source Flexline to Vacuum Source To vent To large o-ring X2 Relief Valve AN Fitting 2-way 2-position solonoid valve

Flexline to Nitrogen Source Flexline to Vacuum Source To vent To large o-ring X2 Relief Valve 3-way 2-position solonoid valve AN Fitting 2-way 2-position solonoid valve

Analysis Performed – Simscape Model

 Case 1)

Analysis Performed – Simscape Model  Case 2)

Analysis Performed – Simscape Parameters  Model Orings as Orifices 1 2

Diffusion Diffusion Coefficient for 2 gasses Diffusion Flux: Movement due to Diffusion across an area

Gantt Diagram

Risk Assessment

Questions??