*Features:

Kaidun All-glass Vacuum Tube is made of dual borosilicate glass tubes, the space between the two tubes is evacuated. The AL/N/AL selective coating on the outer wall of the inner tube absorbs sunshine and transforms it into heat which in turn heats the cold water in the inner tube. When the water in the tube is heated, its density will decrease and will go upward into the tank; meanwhile the cold water in the tank will flow down into the tube due to its greater density. Thus, the circulation and heat-exchanging in the system is completed. The color of the inner tube is black-grey. This vacuum tube has a high heat-efficiency and low price. It is suitable in areas with winter temperature above–20°C.

 

*Specification of All-glass Vacuum Tube

A) Structure: all glass concentric dual layer tube

B) Glass material: borosilicate

C) Absorptance: >0.90

D) Emittance: <0.08 (80℃)

E) Vacuum: <5x10-5 Pa

F) Stagnation: >230 ㎡.℃/KW

G) Average Heat Loss: <0.8 w/ ㎡.℃

H) Service life: more than 15 years

*Features:

Kaidun Highly-absorptive Vacuum Tube is made of borosilicate glass, which applies the advanced 12-layer of spattering deposition technology of gradual change of ALN/AIN-SS/CU selective absorptive coating. This makes the vacuum tubes highly absorptive and highly durable to high temperature and low temperature. Meanwhile the vacuum tube features a low reflection ratio. The interlayer gives the tube a unique effect of thermo, and the surface temperature could be as high as 380℃. It is the key part of the solar water heater and decides the performance of the heating system.

   

                                             Chart of Specifications

 
 

*Specification of Highly-absorptive Vacuum Tube

 

A) Structure: all glass concentric dual layer tube

B) Glass material: borosilicate

C) Absorptance: >0.92

D) Emittance: <0.08 (80℃)

E) Vacuum: <5*10-3 Pa

F) Stagnation: >230 ㎡.℃/KW

G) Average Heat Loss: <0.8 w/ ㎡.℃

H) Service life: more than 15 years

 

 

Technical Data of Highly-absorptive Vacuum Tube

 

 

*Size： 58 x 1800 mm      

               

*Features:

A) A perfect combination of the vacuum tube and the heat pipe.

B) Higher heating efficiency, advanced heat transferring mode of the heat pipe, excellent selective absorptive coating and perfect heat preservation.

C) Wide application range. Started up quickly even in cloudy days to collect heat effectively. As there is no water in the vacuum tube, it can effectively prevent the decreasing of heating efficiency due to frozen cracking or scaling. It can work normally   

     even at the temperature of -30 ℃.

D) Independent tube makes the system reliable. As each individual tube can work independently, and the whole machine can still work if some of the tubes are damaged.

E) Service life: more than 15 years.

F) The unique connection between the heat pipe and the vacuum tube ensures sealing effect.

G) The replacing of damaged vacuum tube is very easy.

             

    ALN/AIN-SS/CU              AL/N/AL

 

 

 
       Heat Pipe（Φ58mmX1800mm）           Metal Heat Pipe（Φ70mmX1900mm）

*Size：A) 70 x 1700 mm   

           B) 70 x 1900 mm   

 

*Features:

A) The ALN/AIN-SS/CU selective coating is sputtered on a slice of aluminum fin instead of on the wall of glass tube, this greatly increases the effective heat-absorbing area. The heat is conducted via the medium liquid in the heat pipe between the double layers of the aluminum fins, the vacuum tube works mainly as an insulation to preserve the heat.

B) Higher heating efficiency, advanced heat transferring mode of the heat pipe, excellent selective absorptive coating and perfect heat preservation.

C) Wide application range. Started up quickly even in cloudy days to collect heat effectively. As there is no water in the vacuum tube, it can effectively prevent the decreasing of heating efficiency due to frozen cracking or scaling. It can work normally even at the temperature of -50 ℃.

D) Independent tube makes the system reliable. As each individual tube can work independently, and the whole machine can still work if some of the tubes are damaged.

E) The replacing of damaged vacuum tube is very easy.

F) The unique connection between the heat pipe and the vacuum tube ensures sealing effect.

G) Service life: more than 15 years.