EVACUATED TUBE COLLECTOR

ETC ( Evacuated Tube collector ) Solar tubes are the absorber of the solar water heater.They absorb solar energy converting it into heat for use in water heating. Solar tubes are also referred to as evacuated tubes, as the space between the two glass layers is evacuated to form a vacuum.Solar tubes have already been used for years in Germany, Canada, China and the UK. "Twin-glass tube" technology is chosen for its reliability, performance and low manufacturing cost.Each solar tube consists of two glass tubes made from extremely strong borosilicate glass. The outer tube is transparent allowing light rays to pass through with minimal reflection. The inner tube is coated with a special selective coating (Al-N/Al) which features excellent solar radiation absorption and minimal reflection properties. The system is highly efficient with excellent absorption (>93%) and minimum emittance (<6%).The average temperature attained is around 50 degrees during the cold months Installation procedure is very simple and is relatively maintenance free. It is affordable with only one time cost.How does a Sun-Wize Solar water heater work?Sun-Wize Solar water heaters use state-of-the-art technology based on evacuated glass tubes and highly efficient heat transfer techniques.Flat plate solar water heaters are only at their maximum efficiency in the middle of the day. A great deal of the Sun's energy is simply reflected off the flat glass panels, especially in the morning and afternoon.Because the evacuated tubes in Solar water heater are cylindrical, they are always facing the Sun and can absorb more of the Sun's energy.In fact, an ETC Solar collector will absorb up to 40% more of the Sun's energy that a comparably sized flat plate solar collector.The tubes consist of 2 layers of toughened glass with a vacuum between these 2 layers. This evacuated layer in the tubes acts much like a thermos flask retaining about 97% of the energy absorbed from the Sun. This helps increase the efficiency of the collector and also protects it from the effects of cold air.As a result, an evacuated tube solar collector is the perfect system for very cold areas being frost protected down to minus 40 degrees Celsius.The Sun's energy that is absorbed by the tubes is then transferred to your water via each tube. This water is turned to increase temperature by the Sun, which are inserted into a heat transfer manifold located on your roof. Water is then pumped through this manifold absorbing the heat and stored in a water storage tank located below.The result is an incredibly efficient system to harness the heat of the Sun even in extremely cold areas. Because the system is so efficient it does not require full sun and can work in cloudy or even rainy days.