NSTX TF Bundle Center Stack Curing Oven l
NSTX TF Bundle & Center Stack Curing Oven l l Mike Viola Joe Rushinski Frank Jones April 14, 2003 4/14/2003
NSTX TF Bundle & Center Stack Curing Oven l Criteria: • Fit the TF bundle with Hub Assembly • Controlled heating to 200ºC (392ºF) for epoxy curing and 465ºF for tube soldering • Oven is 4’ x 24’ long • Oven is capable of 600ºF • Uniform Heating • Easy access to bundle during curing for bolt tightening • Oven is 384 ft 3 @1000 CFM ~ 3 air changes per minute • Oven is split lengthwise with guidepins (no bolts) 4/14/2003 2
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. ) 4/14/2003 3
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: RECTANGULAR Duct Side a Dimension (in): 14 Duct Side b Dimension (in): 8 Flow Rate: 2000 SCFM Duct Length (ft): 14 Viscosity (c. P): 0. 018 Inlet Pressure (PSIG): 0 Temperature (F): 500 Duct Material: GALVANIZED METAL Duct Roughness (ft): 0. 0005 Fluid Velocity (ft/min): 5159. 32 Reynolds Number: 280907 Flow Region: Turbulent Friction Factor: 0. 0184 Density at Inlet: 0. 041 Specific Volume at Inlet: 24. 163 Specific Heat Ratio: 1. 4 Velocity Pressure (inches Water): 0. 917 Velocity High: 5159. 32 4/14/2003 Straight Duct Loss (inches Water): 0. 248 Hood Entry Type: None Elbow Aspect Ratio 1: 2. 0 Radius / Duct Diameter 1: 1. 0 Number Of Elbows 1: 2 Elbow Loss Factor 1: 0. 21 Elbow Loss 1 (inches Water): 0. 385 Duct Exit Configuration: Expansion within Duct Expansion Taper Angle (Degrees): 30 Diameter Ratio: 1. 75: 1 Loss Factor: 0. 51 Velocity Pressure Outlet (inches Water): 0. 097761953 Exit Configuration Loss (inches Water): -0. 292 Equipment Name 1: Heater Equipment 1 Pressure Drop (inches Water): 0. 05 Equipment Name 2: Heater Equipment 2 Pressure Drop (inches Water): 0. 05 Total Duct Loss (inches Water): 0. 441 4
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: ROUND Duct Diameter (in): 12 Flow Rate: 2000 SCFM Duct Length (ft): 14 Viscosity (c. P): 0. 018 Inlet Pressure (PSIG): 0 Temperature (F): 500 Duct Material: GALVANIZED METAL Duct Roughness (ft): 0. 0005 Fluid Velocity (ft/min): 4703. 58 Reynolds Number: 268213 Flow Region: Turbulent Friction Factor: 0. 0184 Density at Inlet: 0. 041 Specific Volume at Inlet: 24. 163 Specific Heat Ratio: 1. 4 Straight Duct Loss (inches Water): 0. 196 Hood Entry Type: None Elbow Type 1: 4 piece Radius / Duct Diameter 1: 1. 50 Number Of Elbows 1: 3 Elbow Sweep 1 (Degrees): 90 Elbow Loss Factor 1: 0. 27 Elbow Loss 1 (inches Water): 0. 617 Duct 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 4/14/2003 5
NSTX TF Bundle & Center Stack Curing Oven Are Velocit a y Duct Los s 12 x 14 168 3379 0. 225 0. 393 2000 14 154 3455 0. 374 0. 411 2000 12 x 12 144 3936 0. 279 0. 534 2000 8 x 14 112 5159 0. 441 0. 917 2000 12 113 4703 0. 814 0. 762 SCF M Size 2000 Pressu re Choose 12 x 12 Square Supply with 14” round return 4/14/2003 6
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: RECTANGULAR Duct Side a Dimension (in): 12 Duct Side b Dimension (in): 12 Flow Rate: 2000 SCFM Duct Length (ft): 14 Viscosity (c. P): 0. 018 Inlet Pressure (PSIG): 0 Temperature (F): 500 Duct Material: GALVANIZED METAL Duct Roughness (ft): 0. 0005 Fluid Velocity (ft/min): 3936. 01 Reynolds Number: 245354 Flow Region: Turbulent Friction Factor: 0. 0183 Density at Inlet: 0. 041 Specific Volume at Inlet: 24. 163 Specific Heat Ratio: 1. 4 Velocity Pressure (inches Water): 0. 534 4/14/2003 Straight Duct Loss (inches Water): 0. 125 Hood Entry Type: None Elbow Aspect Ratio 1: 1. 0 Radius / Duct Diameter 1: 1. 5 Number Of Elbows 1: 2 Elbow Loss Factor 1: 0. 13 Elbow Loss 1 (inches Water): 0. 139 Duct Exit Configuration: Vertical Discharge, No Loss Exit Configuration Loss (inches Water): 0 Equipment Name 1: Heater Equipment 1 Pressure Drop (inches Water): 0. 05 Equipment Name 2: Heater Equipment 2 Pressure Drop (inches Water): 0. 05 Total Duct Loss (inches Water): 0. 364 7
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: ROUND Duct Diameter (in): 14 Flow Rate: 2000 SCFM Duct Length (ft): 14 Viscosity (c. P): 0. 018 Inlet Pressure (PSIG): 0 Temperature (F): 500 Duct Material: GALVANIZED METAL Duct Roughness (ft): 0. 0005 Fluid Velocity (ft/min): 3455. 69 Reynolds Number: 229897 Flow Region: Turbulent Friction Factor: 0. 0182 Density at Inlet: 0. 041 Specific Volume at Inlet: 24. 163 Specific Heat Ratio: 1. 4 Straight Duct Loss (inches Water): 0. 09 Hood Entry Type: None Elbow Type 1: 4 piece Radius / Duct Diameter 1: 2. 50 Number Of Elbows 1: 3 Elbow Sweep 1 (Degrees): 90 Elbow Loss Factor 1: 0. 23 Elbow Loss 1 (inches Water): 0. 284 Duct Exit Configuration: Vertical Discharge, No Loss Exit Configuration Loss (inches Water): 0 Velocity Pressure (inches Water): 0. 411 Total Duct Loss (inches Water): 0. 374 4/14/2003 8
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: RECTANGULAR Duct Side a Dimension (in): 40 Duct Side b Dimension (in): 40 Flow Rate: 2000 SCFM Duct Length (ft): 24 Viscosity (c. P): 0. 018 Inlet Pressure (PSIG): 0 Temperature (F): 500 Duct Material: GALVANIZED METAL Duct Roughness (ft): 0. 0005 Fluid Velocity (ft/min): 354. 24 Reynolds Number: 73606 Flow Region: Turbulent Friction Factor: 0. 0198 Density at Inlet: 0. 041 Specific Volume at Inlet: 24. 163 Specific Heat Ratio: 1. 4 Velocity Pressure (inches Water): 0. 004 4/14/2003 Straight Duct Loss (inches Water): 0. 002 Hood Entry Type: None Duct Exit Configuration: Vertical Discharge, No Loss Exit Configuration Loss (inches Water): 0 Total Duct Loss (inches Water): 0. 002 9
NSTX TF Bundle & Center Stack Curing Oven l Heaters: • 480 3Ø • require a minimum of 6 ft/sec @ 650ºF • Heater duct is 12”x 24” ∴ min flow required is 750 CFM l Blower: l Insulation: • Radial fan to provide high flow rates @ pressure • Max Temp is 600ºF • 208 3Ø • 2” 4/14/2003 10
NSTX TF Bundle & Center Stack Curing Oven INSULATION 4/14/2003 Tem Thickness p Watts 1 106 7376 1. 5 95 5156 2 89 3977 11
NSTX TF Bundle & Center Stack Curing Oven l l l Mass: • TF Bundle 2820 lbs. • Mold 4500 lbs. • Oven 7400 lbs. Thermal units: Thermal Conductivity BTU/h (ft) ºF 227 9. 4. 018 Specific Heat BTU/(lb) ºF. 092. 12 • Copper • Steel • Air 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. 14 BTU/h • • • Initially q=(8 BTU/h (ft 2) ºF) 25 ft 2 (392 -70) = 64, 400 BTU/h = 18. 8 KW Final q=(8 BTU/h (ft 2) ºF) 25 ft 2 (400 -392) = 1, 600 BTU/h = 1 KW Plus losses through insulation: 4 KW QTot=159 KW-hours for a 9 hours rise=17. 7 KW/hour Convection heat transferred: q=h A ΔT 4/14/2003 12
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