The Principle of thermosyphon
The main body of Sunny Solar Energy Water Heater pre-heated solar system consists of four parts: Vacuum Tubes, Heat Preservation Tank, Assistant tank and Support Frame.
The chief heat-collected part is the vacuum tubes (infrared-reflection layer, absorbance layer, anti-reflection layer), which are made up of two borosilicate glass tubes using full automatic equipment and advanced international magnetron sputtering technology.
The outside of the inner tube is coated with aluminum nitride layer or stainless aluminum nitride, which can endure a temperature up to 350℃. The coating absorbs sunlight exclusively (absorptance≥0.92, emittance≤0.09, 80℃).
The vacuum tubes absorb sunlight and convert the solar energy into power. Due to the thermo-siphon effect, the hot water in the vacuum tubes flows into the tank and the cold water enters into the vacuum tubes. The circulation repeats and the water in tank become hot. Then when you add cold water in to the copper coil, the water in the tank will heat the water in the copper coil, after the water circulate a circuit ,the water will be heated too.
The water you actually use is the water in the copper coil, it means it is the fresh water (there is no pollution in the water).
Specifications of the material
- Inner tank: stainless steel 304-2B, (food-graded), Thickness: 0.40mm
- Outer tank: stainless steel 304-BA, Thickness: 0.40mm.
- Insulating layer: 55mm high-density polyurethane foamed.
- Glass tube: three target vacuum tubes 58*1800mm, High borosilicate glass 3.3, with thickness of no less than 1.6mm. The hail resistance will reach a diameter of 30mm.
- Bracket: Aluminum(1.5mm)
Vacuum Tube
- Vacuum tube: 3.3high borosilicate glass
- The vacuum tube of our solar water heater has the high absorption rate and low emission rate,
- The absorption rate is 0.93-0.96(AM1.5)
- The emission rate is 0.04-0.06 (80C±5C)
- Vacuum tightness is P≤5.0*0.0001Pa
- Idle sunning property parameters is Y=260-300㎡.c/KW
- The average heat loss coefficient is Ult=0.4-0.6W (㎡.c)
Electric Heater |