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Published byHolly Martin Modified over 9 years ago
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Área de Instrumentación INSTITUTO DE ASTROFÍSICA DE CANARIAS J. Fuentes and D. Sosa Instituto de Astrofísica de Canarias NAHUAL THERMAL MODEL
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Área de Instrumentación J. Fuentes and D. Sosa Instituto de Astrofísica de Canarias 2 Dewar Cold Shield Dewar Electro Polished AlMLI 20 layer Qr 1 =82 W Qr 2 =96 W Qr 3 =111 W Qr 1 =27 W Qr 2 =31 W Qr 3 =36 W Qr i = Q(T i ) T 1 =271 KT 2 =281.5 K T 3 =292 K MLI Combinations without Floating Shield Text 77 K Text 77 K Cold Shield
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Área de Instrumentación J. Fuentes and D. Sosa Instituto de Astrofísica de Canarias 3 CS Dewar FS Electro Polished Al MLI 20 layer 1 2 3 4 CS Dewar FS CS Dewar FS CS Dewar FS Qr 1 =58 W Qr 2 =67 W Qr 3 =78 W Qr 1 =17 W Qr 2 =20 W Qr 3 =23 W Qr 1 =24 W Qr 2 =28 W Qr 3 =32 W Qr 1 =12 W Qr 2 =14 W Qr 3 =16 W Qr i = Q(Text i ) T ext 1 =271 K T ext 2 =281.5 K T ext 3 =292 K Text 77 K MLI Combinations with Floating Shield FS = floating shield CS = Cold Shield
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Área de Instrumentación J. Fuentes and D. Sosa Instituto de Astrofísica de Canarias 4 wirespipes window rad trusses 10 W2 W15 W 3 W 20 W Case 2 Text = Tnom = 281.5 K 20 W radiation Dewar AS CS 281.5 K 275 K 77 K LN2 Vessel for 24 hr lasting time: 27 L conduction load = 27 Wradiation load = 23 W Heat Map
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Área de Instrumentación J. Fuentes and D. Sosa Instituto de Astrofísica de Canarias 5 wirespipes window rad trusses 10 W2 W15 W 3 W 14 W Case 4 Text = Tnom = 281.5 K 14 W radiation Dewar AS CS 281.5 K 277 K 77 K LN2 Vessel for 24 hr lasting time: 24 L conduction load = 27 Wradiation load = 17 W Heat Map
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