See larger image!
1, vacuum and direct current,
2,selective coating
3,heat pipe in it,
the tube working temperature 100-400℃
It just work for solar thermal power plants, Parabolic trough system, solar air-condition.
The dia. Has 100mm,120mm, inner dia 70-100mm, and the length has 1500mm,1800mm,2000mm,4000mm
