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| Three Target Tube | |||
| Length | 1800mm/1500MM | ||
| Outer Tube Diameter | 58mm/47 | ||
| Inner Tube Diameter | 47 mm | ||
| Glass Thickness | 1.6mm | ||
| Material | High Borosilicate 3.3 glass | ||
| Absorption Coating | Cu/SS-ALN(H) / SS-ALN(L)ALN | ||
| Absorptance | as=0.93 ~ 0.96(AM1.5) | ||
| Emittance | 0.04~0.06(800C + 50C) | ||
| Vacuum | P<5.0x10-3Pa | ||
| Heat Loss | Ult=0.4~0.6W / (m2 0C) | ||
| stagnation temperature | >2700 c | ||
solar evacuated tube