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Assumptions:

Assumptions:. All elements have base temperature of -226F (130K) with exception of face of cooled G-10 which is forced to remain at -321F (77K) Properties are not temperature dependent – although properties used are for G-10 @ -321F & Copper (CDA) properties are at -280F

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Assumptions:

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  1. Assumptions: • All elements have base temperature of -226F (130K) with exception of face of cooled G-10 which is forced to remain at -321F (77K) • Properties are not temperature dependent – although properties used are for G-10 @ -321F & Copper (CDA) properties are at -280F • Cryogenic properties obtained from Handbook on Super-conducting machinery (9/1984)

  2. Model: • ~2500 brick elements • Transient Thermal analysis • 300 steps @ 3 sec per step

  3. 0.350” 0.391” G-10 (0.016” THK) Cu 1 Cu 2 6” -321F See plot 1 & 2 See Plot 3

  4. Plot 2 – details of thermal run thru thickness

  5. Thermal Model

  6. Plot 1 – thru thickness

  7. Thermal analysis (double click to run)

  8. Plot 3 – thermal run along length

  9. G-10 (-321F) CDA Copper (-280F) Specific heat 27% of RT 64% of RT Thermal conductivity 52% of RT 116% of RT Notes: Material factors RT to Cryogenic

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