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Spacing of Cu clamp = 10” Clamp plate width = 2.5”, thickness = 0.375” Thickness of conductor insulation = 0.03” Thickness of coil ground wrap = 0.03”

Published byNora Mathews Modified over 8 years ago

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Presentation on theme: "Spacing of Cu clamp = 10” Clamp plate width = 2.5”, thickness = 0.375” Thickness of conductor insulation = 0.03” Thickness of coil ground wrap = 0.03”"— Presentation transcript:

1 Spacing of Cu clamp = 10” Clamp plate width = 2.5”, thickness = 0.375” Thickness of conductor insulation = 0.03” Thickness of coil ground wrap = 0.03” Copper sheet width = 7.5”, thickness = 0.085” Copper mesh width = 7.5”, thickness = 0.0394” Modular Coil Cooling Option #7 – Cooling Tubes Along the Perimeter of the Clamp Conductor cable: 75% copper 25% epoxy Temperature constraint = 80K Copper clamp Copper sheet Copper mesh Copper sheet

2 FEA Model Initial Temperature = 85K Thermal conductivity of Cu mesh is 50% of Cu All surfaces are fully contacted Temperature-dependent material Properties Gap Copper mesh Copper sheet

3 Cryogenics Material Properties Specific Heat (J/kg-K) 80K100K150K200K Cable171.4212.3270.1 300.7 Cooling plate 205.1255.3324.1359.0 Insulation348.9413.7537.0626.8 Shell & T-beam 215.3275.5362.1416.4 Thermal Conductivity (W/m-K) 80K 100K150K200K Cable397.0346.2313.7305.2 Cooling plate 529.3461.5418.1407.0 Outer Insulation0.2360.2630.3090.337 Inner Insulation0.2160.2400.2810.305 Shell & T-beam 8.1149.22411.17 12.63 Coil Currents and Ohmic Heating Current profile from web address: http://www.pppl.gov/me/NCSX_Engineering/Technical_Data/MOD00/Inputs_1.7T.htm

4 Temperature Plots at The End of 1 st Heating Cycle -- Based on Kapton and CTD101K as Conductor Insulation -- Interior 20% Kapton, Exterior 10% Kapton Thermal conductivity Kapton CTD-101K 80 K0.128 W/m-K 0.260 W/m-K 100 K0.142 W/m-K 0.290 W/m-K 150 K0.163 W/m-K 0.343 W/m-K 200 K0.175 W/m-K 0.375 W/m-K 10% Kapton 20% Kapton 80 K0.236 W/m-K 0.216 W/m-K 100 K0.263 W/m-K 0.240 W/m-K 150 K0.309 W/m-K 0.281 W/m-K 200 K0.337 W/m-K 0.305 W/m-K Equivalent thermal conductivity: L e /K e = L 1 /K 1 + L 2 /K 2 10% Kapton20% Kapton

5 Temperature Plots at The End of 1 st Cooling Cycle -- Based on Kapton and CTD101K as Conductor Insulation -- Interior 20% Kapton, Exterior 10% Kapton

6 Conductor Temperature at The End of 1 st Cooling Cycle -- Based on Kapton and CTD101K as Conductor Insulation -- Interior 20% Kapton, Exterior 10% Kapton Equivalent thermal conductivity: L e /K e = L 1 /K 1 + L 2 /K 2 10% Kapton20% Kapton

7 Temperature Plots at The End of 1 st Cooling Cycle for Various Widths of Cu Sheet and Cu Mesh 25% 50%75% 100%

8 Maximum Temperatures on Modular Coil Components Maximum Temperature Data (K)

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