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solar heat pipe vacuum tube
Solar heat pipe vacuum tube is a perfect combination of vacuum tube and copper heat pipe ,heat pipe is such a copper pipe with its inside evacuated and filled with a small quality of fluid ,the fluid medium has a very low boiling point,when the medium get heated over its boiling point the fluid vaporized ,the vapor carrying with heat energy rapidly rises to the top of inside heat pipe for heat exchanging,as heat is released to the water,the vapor cooled and condenses to form liquid and returns to the bottom of inside heat pipe to once again repeat heat exchanging process.
Because of the unique heat exchanging theory,heat pipe vacuum tube has a quick startup,high working temperature and bearing pressure and supper anti-freeze character.
Specification of solar heat pipe vacuum tube in three target coating
| Vacuum Tube Structure | All-glass double-tube co-axial structure | |||||
| Glass Material | High borosilicate 3.3 glass | |||||
| External Tube Diameter & Thickness | Φ=47±0.7mm &=1.6mm, Φ=58±0.7mm &=1.6mm, Φ=70±0.7mm &=2.0mm | |||||
| Internal Tube Diameter & Thickness | Φ=37±0.7mm &=1.6mm, Φ=47±0.7mm &=1.6mm, Φ=58±0.7mm &=1.6mm | |||||
| Pipe Length | 800mm, 1200mm, 1500mm, 1600mm, 1800mm, 1900mm, 2000mm, 2100mm | |||||
| Absorbing Coating | Structure | Cu/SS-ALN(H)/SS-ALN(L)/ALN | ||||
| Sediment Method | 3 target magnetron sputtering plating | |||||
| Specific Absorption | as=0.93~0.96(AM1.5) | |||||
| Emission Ratio | εh=0.04~0.06(80±5) | |||||
| Vacuum Tightness | P≤5.0X10-3Pa | |||||
| Idle Insolation Property | Y=260~300m2./KW | |||||
| Solar Irradiation | H=3.74~4.2MJ/m2 | |||||
| H=2.9~3.2MJ/m2 | ||||||
| Average Heat Loss Coefficient | ULT=0.4~0.6W/(m2.) | |||||
There are several heat pipe for solar heat pipe vacuum tube use.
same length of 1700mm diameter 8mm
I.condensor difference:
1.heat pipe : condensor in 14mm
2.heat pipe: condensor in 24mm
II. Nickle chromed or not
Focus on our solar heat pipe vacuum tube:
1.high quality copper material
2.alumin fins for the conduct heat to heat pipe is in one whole piece for fast heating transfer
3.fluid in heat pipe against extremly cold area reaches minus 35degree temperature.
4.solar heat pipe vacuum tube is widely applied to integrative pressurized solar water heater tank and copper flow passage manifold as a whole solar water heater set and solar collector set.
