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Jesse Schofield Masters of Engineering in Mechanical Engineering April 2010 RPI Hartford

Jesse Schofield Masters of Engineering in Mechanical Engineering April 2010 RPI Hartford. Design for Heat Exchanger of Sensible Heat Transfer of Gas Flows for Pebble Bed Reactor Applications. Refresher. Pebble Bed Modular Reactor (PBMR) Application

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Jesse Schofield Masters of Engineering in Mechanical Engineering April 2010 RPI Hartford

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  1. Jesse Schofield Masters of Engineering in Mechanical Engineering April 2010 RPI Hartford Design for Heat Exchanger of Sensible Heat Transfer of Gas Flows for Pebble Bed Reactor Applications

  2. Refresher • Pebble Bed Modular Reactor (PBMR) Application • Helium-Helium High Temperature Heat Exchanger (HTHX) • Turbine stream isolation to prevent possible contamination • Modular design to allow HTHX series with ability to bypass and replacement without losing cooling ability (Achieve transfer with part of the flow).

  3. Methodology Evaluation of Equations and relationships Apply Researched design limits (fluid properties, expected Reynolds numbers, transfer coefficients, fouling compensation) Preliminary Design Creation Narrowing and Verification of Successful Design

  4. Revision of Scope • Previous goal was for a Optimized Design Method • Revision will be for single or multiple design/s for specific transfers or property ranges • Reason: Optimized Design Method requires an extensive iteration process to result in a singular best practice exchanger • Iteration work is a deep research field using novel genetic algorithms or unique computer software • Project will represent and analytical test case, rather than an encompassing method for any PBMR application

  5. PBMR Application Limits

  6. Equations and Standards IHX System: LMTD NTU-e Tubeside: Seider-Tate Eq VDI-Mean Nusselt Method Shellside: Bell-Delaware Method Kern Method Stream Analysis

  7. Method to Design

  8. Assumptions • Laminar Flow considerations • Helium-Helium • Simple flow network for fouling considerations • Material Properties for those deemed within limits (metal alloys, SiC) • Modular design with 5 IHX for full flow

  9. Remaining Work • Narrowing of Equation Focus • Establishing Clear calculation walkthrough • Identification of IHX characteristics • Research on certain properties for conservative assumptions (fouling rate, appropriate design margin, wall thicknesses for design pressures)

  10. Questions? • Please see personal webpage for updated references

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