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  • Vakuumska ploskovna izolacija : disertacija
    Nemanič, Vincenc
    In the thesis, analysis of heat transfer contributions across evacuated gap between thin metal stainless steel foils locally supported by appropriate supporting beads, is given. These must be ... optimised for minimum solid conductance, which should be realised at minimum wall thickness to safely support atmospheric pressure at minimum lateral conductance. The gap is relatively empty to enable efficient pump down to molecular state of the gas and to outgas the walls to required level. Two main problems are further analysed in details, not related in such context in previous works: To determine the lowest limit of perpendicular heat flow across the structure with all three mechanisms: solid conductance, gas transfer and radiation, regarding very limited range of suitable technical materials. To select vacuum processing which leads to stable insulation grade vacuum during the operation period of several years, which is acceptable for any practical use.
    Vrsta gradiva - disertacija
    Založništvo in izdelava - Ljubljana : [V. Nemanič], 1996
    Jezik - slovenski
    COBISS.SI-ID - 1604123

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