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U Collectors Northeast
U Collector Southwest
U Collector Front View
U Pipe Collector Right View
U Pipe Collectors Northwest
U Pipe Collector Southeast
U Type Collectors Left View
U Type Collectors Rear View

U Pipe Solar Collector

U pipe solar collector working principle:
Each vacuum tube has a direct flow U pipe that is connected to the header pipe inside manifold. Each U pipe is seamed in an aluminum heat transfer fin inside of vacuum tube that transmits the heat from the inner tube to the U pipe. The liquid (usually a glycol-water antifreeze mixture) inside of the copper U pipe is heated, then conducts the heat energy to the water inside of storage tank through plate exchanger or internal spiral coil.

U pipe solar collector characteristic:
● Solar Keymark(EN12975) certified,  click here.
● Higher efficiency η0 = 0.79 (aperture area).
● Low temperature resistance, even can be work under -50℃ ambient, so can be used all year round in cold climate area.
● Passive tracks the sun: the round absorber surface of vacuum tubes passively track the sun throughout the day.
● Available in 8,10, 12, 15, 18 and 20 tubes model, flexible combination. 
● No water inside vacuum tube, so vacuum tube will not break in the winter frozen weather. 
● In the event of a tube damaged, the whole system will still keep working, just remove and replace, low cost. 
● Combined with building perfectly, installation angle from 0° to 90°, ideal for slope roof or flat roof installation.
● It can be combined with existing water heating device easily.
● Tube can be replaced without draining solar fluid; 
● Significant advantages over flat plate.
● Low maintenance!
 
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U Pipe Solar Collector Key Components
U Pipe Solar Collector Key Components

U pipe solar collector specification: 
1. Vacuum tube: Borosilicate glass 3.3, ALN/AIN-SS/CU coating, Φ58×1800mm. 
2. Manifold casing: Aluminium alloy (Color: silver and black).
3. Header pipe: Red copper.
4. U pipe: Red copper.
5. Insulation layer: Compressed rock wool. 
6. Heat transfer fin: Integrated aluminium sheet.
7. Frame: Aluminium alloy.
8. Inlet/outlet: Φ22mm(3/4 and 1inch).
9. Working pressure: 0.6MPa.
 
U Pipe Solar Collector Thermal Performance Test tm - ta  [k] Global Irradiance G
G=400W/m2 G=700W/m2 G=1000W/m2
0k 600W 1050W 1478W
10k 569W 1019W 1450W
30k 495W 945W  1380W
50k 405W 855W 1290W

U pipe solar collectors application:
1) Domestic water heating, such as shower, kitchen washing.etc.
2) Room heating, such as under floor and radiator heating.
3) Old heating equipment/system retrofit.
4) Large scale commercial solar water heating system, such as hotel, apartment, school, hospital.etc.

Sun Morning Midday Afternoon Incident Angle Reference area Aperture area Gross area
η0 0.79 0.455
a1W/(m2k) 1.35 0.778
a2 W/(m2k) 0.013 0.008

Parameter table:
Model Heat pipe vacuum tube Header pipe / U pipe (mm) Power output (W) L/W/H (mm) Loading Qty. (set)
Dia. (mm) Len. (mm) Qty. (pcs)  20GP 40GP 40HQ
JUC-5818-8 58 1800 8 Φ22 / Φ8 591 1960 x775 x 138 83 179 208
JUC-5818-10 58 1800 10 Φ22 / Φ8 739 1960 x925 x 138 70 150 175
JUC-5818-12 58 1800 12 Φ22 / Φ8 887 1960 x1075 x 138 60 129 150
JUC-5818-15 58 1800 15 Φ22 / Φ8 1108 1960 x1300 x 138 50 108 125
JUC-5818-18 58 1800 18 Φ22 / Φ8 1330 1960 x1525 x 138 41 88 103
JUC-5818-20 58 1800 20 Φ22 / Φ8 1478 1960 x1675 x 138 38 81 94

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