Three-target vacuum tube

Group Solar Vacuum Tube
PriceUS $2.3-6 / set
Min. Order 1000 set
Terms of Payment Western Union, T/T
Update Time 2018-11-27
Item specifics
TypeNon-Pressure
ApplicationWater Heater
Pipe MaterialGlass
Size58*1800mm
Description

Three-target vacuum tube Technical Parameters

 

  Structure

  All-glass double-tube co-axial structure

  Glass material

  High borosilicate 3.3 glass

  External pipe diameter and  thickness

  Φ=47±0.7mm  &=1.6mm,  Φ=58±0.7mm  &=1.6mm,
  Φ=70±0.7mm &=2.0mm

  Internal pipe diameter and 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 property

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 sunning property parameters

  Y=260~300m2./KW

  Solar irradiation   for obtaining a   preset water   temperature

  H≤3.7MJ/m2(Φ47)

  H=3.74~4.2MJ/m2

  H≤4.7MJ/m2(Φ58)

  H=2.9~3.2MJ/m2

  Average heat loss coefficient

  ULT=0.4~0.6W/(m2.)

 

Three-target vacuum tube Working Principle:

Tri-target solar vacuum tube, connecting with water tank or manifold, when it works, cold water flows down into the vacuum tube, and there it is heated with solar energy absorbed by the coating outside of inner vacuum tube, the solar will be absorbed efficiently by the coating with little loss of heat because of the vacuum between the inner and outer glass tubes, and when cold water becomes hot, hot water will rise up to water tank or manifold because of the larger proportion to cold water, cold water again flows into solar vacuum tube for another heating process.

 

Three-target vacuum tube

 

Three-target vacuum tube