Effective Emittance Measurements on Multi-Layer Insulation Concepts for Space Station Freedom External Lines 932228

Effective emittance was measured for four Multi-Layer Insulation (MLI) blankets designed for Space Station fluid lines. Blanket #2 was built for a 25.4 mm line; Blankets #1, 3 and 4, were built for 12.7 mm lines. Blankets #3 and 4 minimized flap material to reduce heat loss. Blankets #1, 2, and 3 had aluminized inner surfaces; Blanket 4 had a Kapton inner surface. All measured effective emittance values were within 30% of similar Orbiter MLI. Blanket #3 effective emittance values ranged from 0.056 to 0.080 for 47 to -43°C lines, demonstrating improvement from reducing flap material.


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