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