The lifespan of solar water heaters is 15 years. As long as the supporting material is good, does not rust or deform, the thickness of the material used in the water tank is greater than 0.3, the shell has been treated with anti-rust and anti-oxidation, and The insulation layer is evenly filled, there will be no water leakage problem after 15 years, so the lifespan of the solar water heater is 15 years. When using solar energy for a long time, the water tank and vacuum tube should be cleaned, otherwise scale will form corrosion under the scale, causing the water tank to rust, rot and leak. water. In addition, the scale prevents the collector tube from transmitting temperature over time after absorbing heat, causing the coating to overheat and shorten the life of the vacuum tube, thereby affecting the performance of solar energy. Solar water tanks are conseen as structures without pressure. The overflow port and exhaust port of the water tank must not be blocked, otherwise too high water pressure in the water tank will cause the water tank to expand and cause its breakage, which will affect the lifespan of solar energy.
The lifespan of solar energy has a lot to do with the inner tank. Due to different processing methods, the shelf life may be as short as 3 years or as long as 30 years. Some brands will say that they can be used for 15 years when purchased, but they will be disposed of after 10 years of actual use, because the lifespan of the heating tube is only ten years. If it exceeds ten years, the safety factor. will be reduced and the risk of electric shock will easily occur.
Inner coating selection
1 Welding coating, whether you are doing argon arc welding, gas welding,high frequency, manual welding, mechanical welding, the service life is generally 3-5 years, some are better 5-8 years.
2? Completely seamless coating, whether inserting or tightening a rubber ring. Since the water inlet and outlet are at the bottom, the pipeline is easy to sway in the wind after insulation. also prone to problems. However, the service life is longer than that of welding. The inner tank can grow longer, about 10 to 15 years.
At present, the most advanced inner tank is also completely weld-free. However, the water inlet and outlet as well as the inlet and outlet ports are at the top of the inner tank, following the siphon principle. use solar hot water, just like a large water tank, with a lifespan of more than 30 years (the inner tank material should be 304-2B stainless steel).
In addition, there are two reasons for the short lifespan of solar energy
1 Vacuum tube
The vacuum tube is the main component of solar water heater. , and its quality directly affects the overall performance of the solar water heater. Vacuum tube performance and quality are affected by coating technology and processes such as cleaning, coating, vacuuming and sealing. Inferior vacuum tubes have low vacuum degree, poor film stability, and are prone to aging and falling, resulting in rapid attenuation of heat collection performance and inability to absorb sufficient heat.
2 Insulation layer
The thermal insulation performance of the solar water heater is determined by the quality of the insulation layer. A good insulation layer has uniform foaming, high density, low thermal conductivity, resistanceresistance to high temperatures, high thermal insulation performance and is stable and durable.