Haining Astraea Electircal Co., Ltd.

China Manufacturer with main products: Solar Water Heater, PVC Panels, Electric Faucet

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Copper Coil Solar Collector

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Copper Coil Solar Collector / Solar Heat Collector

There are 3 forms of heat transfer.
1. Conduction
When two objects come into contact, heat transfers between the two surfaces. This is based on the type of materials and contact surface area. Copper is without question, the fastest heat conducting material. These solar water heaters use copper tubing to transmit heat from the tubes to the water manifold, which is then collected by the water and then pumped to your water tank.

2. Convection
Convective heat transfer is caused by the flow of a fluid over an object. There is convection caused when the water is pumped through the solar collectors, enabling fast heat transfer and low pumping time. What about the wind blowing over the solar collector? No worry. These are vacuum tubes. The convection must occur directly on the object to cause heat transfer. Wind cannot take any heat out of the system since the vacuum tubes have a void between the copper tubing and the outside glass.

3. Radiation
Radiation occurs all the time with any object. Heat can travel through space through radiation. There's no stopping it. The good news is that the radiation coming out of the solar collectors is extremely minimal, and the radiation coming in from the sun is extremely high due to the black shading of the vacuum tubes and aluminum inserts.

This is the highest of quality solar collector you can get. Copper, aluminum, vacuum tubes. The absorption efficiency is about 95%.
All-glass double-tube co-axial structure
Absorptive coating property
Structure Cu/SS-ALN(H)/SS-ALN(L)/ALN
Sediment method Three targets magnetron sputtering plating
Specific absorption  0.93-0.96(AM1.5)
Emission ratio  0.04-0.06(800C±50C)
Solar irradiation for obtaining a preset water temperature Φ=58  H≤4.7MJ/m²      H=3.7-4.2MJ/m²
Vacuum tightness 5.0×10¯³ Pa
Idle sunning property parameters 260-300 m².C/KW
Average heat loss coefficient ULT=0.4~0.6W/(M 2.0 C)
Heat pipe material T2 copper
Heat pipe size Top: Ø24mm*70 mm;   Body: Ø8mm* 0.7mm
Tube diameter Φ58/1800mm
Fins around heat pipe Single long Aluminum(1.68m)
Heat transfer fluid Pure water + inculating crystal
Copper powder (patented products)
Patent number:200620068576.2
Thickness of insulation(mm) 45
Density of insulation (kg/m 3 ) 90
Hydraulic Connections DN20/DN22/DN25 male thread optional
Fluid volume(L) 1.0
Maximum operation pressure(Bar) 6
Test pressure(Bar) 9
Hydraulic Connections DN20/DN22/DN25 male thread optional
Max.working temp. -30 ~250C
ΔT 35C(Radiation>=800w/m2.day)
Start-up Temperature of heat pipe <=30C
Resistant Hail ≤25mm
Useful life 15 years
Bracket: Stronger AL-alloy Bracket.(2.0mm thickness.)
Bracket angle: 22,38,45 optional, pitched roof, flat roof optional.
Fastening pieces: Made of stainless steel screw
Packing of vacuum tubes Complete foaming packages for HEAT PIPE VACUUM TUBES..

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