1 / 16

NSTX TF Bundle & Center Stack Curing Oven

Mike Viola Joe Rushinski Frank Jones April 14, 2003. NSTX TF Bundle & Center Stack Curing Oven. NSTX TF Bundle & Center Stack Curing Oven. Criteria: Fit the TF bundle with Hub Assembly Oven is 4’ x 4’ x 24’ long

erv
Download Presentation

NSTX TF Bundle & Center Stack Curing Oven

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mike Viola Joe Rushinski Frank Jones April 14, 2003 NSTX TF Bundle & Center Stack Curing Oven

  2. NSTX TF Bundle & Center Stack Curing Oven • Criteria: • Fit the TF bundle with Hub Assembly • Oven is 4’ x 4’ x 24’ long • Controlled heating to 200ºC (392ºF) for epoxy curing and 465ºF for tube soldering • Oven is capable of 600ºF • Uniform Heating • Oven is 384 ft3 @1000 CFM ~ 3 air changes per minute • Easy access to bundle during curing for bolt tightening • Oven is split lengthwise with guidepins (no bolts)

  3. NSTX TF Bundle & Center Stack Curing Oven • Reduced size for future storage & handling • Oven is built in three 8’ sections • Feedthroughs for 12 thermocouples • Windows for viewing potential problems • 4 windows provided (2 at each end) • Parts available to the NCSX Autoclave • Heaters (2 @ 12 KW) • Blower (2000 CFM @ 5 in.; 4000 CFM @ 2 in.)

  4. NSTX TF Bundle & Center Stack Curing Oven Duct Pressure Loss and Velocity Pressure Results Job Number:  TF Bundle Oven Line Number:  Oven Supply  Fluid:  Air Duct Type:  RECTANGULARDuct Side a Dimension (in):  14Duct Side b Dimension (in):  8Flow Rate:  2000 SCFM Duct Length (ft):   14Viscosity (cP):  0.018Inlet Pressure (PSIG):  0Temperature (F):  500Duct Material:  GALVANIZED METAL Duct Roughness (ft):  0.0005Fluid Velocity (ft/min):5159.32Reynolds Number:  280907Flow Region:  TurbulentFriction Factor:  0.0184Density at Inlet:  0.041Specific Volume at Inlet:  24.163Specific Heat Ratio:  1.4 Straight Duct Loss (inches Water):  0.248Hood Entry Type:  NoneElbow Aspect Ratio 1:  2.0Radius / Duct Diameter 1:  1.0Number Of Elbows 1:  2Elbow Loss Factor 1:  0.21Elbow Loss 1 (inches Water):  0.385Duct Exit Configuration:  Expansion within Duct Expansion Taper Angle (Degrees):  30Diameter Ratio:  1.75:1Loss Factor:  0.51Velocity Pressure Outlet (inches Water):  0.097761953Exit Configuration Loss (inches Water):  -0.292Equipment Name 1:  HeaterEquipment 1 Pressure Drop (inches Water):  0.05Equipment Name 2:  HeaterEquipment 2 Pressure Drop (inches Water):  0.05 Velocity Pressure (inches Water):  0.917 Total Duct Loss (inches Water):  0.441 Velocity High: 5159.32

  5. NSTX TF Bundle & Center Stack Curing Oven Duct Pressure Loss and Velocity Pressure Results Job Number:  TF Bundle Oven Line Number:  Oven Return  Fluid:  Air   Duct Type:  ROUNDDuct Diameter (in):  12Flow Rate:  2000 SCFM Duct Length (ft):   14Viscosity (cP):  0.018Inlet Pressure (PSIG):  0Temperature (F):  500Duct Material:  GALVANIZED METAL Duct Roughness (ft):  0.0005Fluid Velocity (ft/min):  4703.58Reynolds Number:  268213Flow Region:  TurbulentFriction Factor:  0.0184Density at Inlet:  0.041Specific Volume at Inlet:  24.163Specific Heat Ratio:  1.4 Straight Duct Loss (inches Water):  0.196Hood Entry Type:  NoneElbow Type 1:  4 piece Radius / Duct Diameter 1:  1.50Number Of Elbows 1:  3Elbow Sweep 1 (Degrees):  90Elbow Loss Factor 1:  0.27Elbow Loss 1 (inches Water):  0.617Duct Exit Configuration:  Vertical Discharge, No Loss Exit Configuration Loss (inches Water):  0 Velocity Pressure (inches Water):  0.762 Total Duct Loss (inches Water):  0.814

  6. NSTX TF Bundle & Center Stack Curing Oven Choose 12x12 Square Supply with 14” round return

  7. NSTX TF Bundle & Center Stack Curing Oven Duct Pressure Loss and Velocity Pressure Results Job Number:  TF Bundle Oven Line Number:  Oven Supply 12” x 12” Square Fluid:  Air Duct Type:  RECTANGULARDuct Side a Dimension (in):  12Duct Side b Dimension (in):  12Flow Rate:  2000 SCFM Duct Length (ft):   14Viscosity (cP):  0.018Inlet Pressure (PSIG):  0Temperature (F):  500Duct Material:  GALVANIZED METAL Duct Roughness (ft):  0.0005Fluid Velocity (ft/min):  3936.01Reynolds Number:  245354Flow Region:  TurbulentFriction Factor:  0.0183Density at Inlet:  0.041Specific Volume at Inlet:  24.163Specific Heat Ratio:  1.4 Straight Duct Loss (inches Water):  0.125Hood Entry Type:  NoneElbow Aspect Ratio 1:  1.0Radius / Duct Diameter 1:  1.5Number Of Elbows 1:  2Elbow Loss Factor 1:  0.13Elbow Loss 1 (inches Water):  0.139Duct Exit Configuration:  Vertical Discharge, No Loss Exit Configuration Loss (inches Water):  0Equipment Name 1:  HeaterEquipment 1 Pressure Drop (inches Water):  0.05Equipment Name 2:  HeaterEquipment 2 Pressure Drop (inches Water):  0.05 Total Duct Loss (inches Water):  0.364 Velocity Pressure (inches Water):  0.534

  8. NSTX TF Bundle & Center Stack Curing Oven Duct Pressure Loss and Velocity Pressure Results Job Number:  TF Bundle Oven Line Number: Oven Return 14” Round Fluid:  Air Duct Type:  ROUNDDuct Diameter (in):  14Flow Rate:  2000 SCFM Duct Length (ft):   14Viscosity (cP):  0.018Inlet Pressure (PSIG):  0Temperature (F):  500Duct Material:  GALVANIZED METAL Duct Roughness (ft):  0.0005Fluid Velocity (ft/min):  3455.69Reynolds Number:  229897Flow Region:  TurbulentFriction Factor:  0.0182Density at Inlet:  0.041Specific Volume at Inlet:  24.163Specific Heat Ratio:  1.4 Straight Duct Loss (inches Water):  0.09Hood Entry Type:  NoneElbow Type 1:  4 piece Radius / Duct Diameter 1:  2.50Number Of Elbows 1:  3Elbow Sweep 1 (Degrees):  90Elbow Loss Factor 1:  0.23Elbow Loss 1 (inches Water):  0.284Duct Exit Configuration:  Vertical Discharge, No Loss Exit Configuration Loss (inches Water):  0 Total Duct Loss (inches Water):  0.374 Velocity Pressure (inches Water):  0.411

  9. NSTX TF Bundle & Center Stack Curing Oven Duct Pressure Loss and Velocity Pressure Results Job Number:  TF Bundle Oven Line Number:  Oven Body  Fluid:  Air Duct Type:  RECTANGULARDuct Side a Dimension (in):  40Duct Side b Dimension (in):  40Flow Rate:  2000 SCFM Duct Length (ft):   24Viscosity (cP):  0.018Inlet Pressure (PSIG):  0Temperature (F):  500Duct Material:  GALVANIZED METAL Duct Roughness (ft):  0.0005Fluid Velocity (ft/min):  354.24Reynolds Number:  73606Flow Region:  TurbulentFriction Factor:  0.0198Density at Inlet:  0.041Specific Volume at Inlet:  24.163Specific Heat Ratio:  1.4 Straight Duct Loss (inches Water):  0.002Hood Entry Type:  NoneDuct Exit Configuration:  Vertical Discharge, No Loss Exit Configuration Loss (inches Water):  0 Velocity Pressure (inches Water):  0.004 Total Duct Loss (inches Water):  0.002

  10. NSTX TF Bundle & Center Stack Curing Oven • Heaters: • 480 3Ø • require a minimum of 6 ft/sec @ 650ºF • Heater duct is 12”x24” ∴ min flow required is 750 CFM • Blower: • Radial fan to provide high flow rates @ pressure • Max Temp is 600ºF • 208 3Ø • Insulation: • 2”

  11. NSTX TF Bundle & Center Stack Curing Oven INSULATION

  12. NSTX TF Bundle & Center Stack Curing Oven • Mass: • TF Bundle 2820 lbs. • Mold 4500 lbs. • Oven 7400 lbs. • Thermal units: Thermal Conductivity Specific Heat • BTU/h (ft) ºF BTU/(lb) ºF • Copper 227 .092 • Steel 9.4 .12 • Air .018 • Heat needed: Q=m Cp ΔT=lb (BTU/lb ºF) ºF • QCopper=2820 (.092) (392-70)=83,540 BTU • QSteel=11900 (.12) (392-70)=459,816 BTU • QTotal=543,356 BTU • 1 KW=3412.14BTU/h • QTot=159 KW-hours for a 9 hours rise=17.7 KW/hour • Convection heat transferred: q=h A ΔT • Initially q=(8 BTU/h (ft2) ºF) 25 ft2 (392-70) = 64,400 BTU/h = 18.8 KW • Final q=(8 BTU/h (ft2) ºF) 25 ft2 (400-392) = 1,600 BTU/h = 1 KW • Plus losses through insulation: 4 KW

  13. NSTX TF Bundle & Center Stack Curing Oven

  14. NSTX TF Bundle & Center Stack Curing Oven

  15. NSTX TF Bundle & Center Stack Curing Oven

  16. NSTX TF Bundle & Center Stack Curing Oven

More Related