Nowadays on the market, there are so many kinds of solar water heaters. If you are not an expert of it, the election of it will be very difficult. So the article here would introduce some methods.
Facing numerous brands of solar water heater on the market, customers are usually confused which one to choose. According to the solar thermal collector, it could be divided into vacuum tube type and slab ones. In the light of structure, solar water heater could fall into one piece construction. On the basis of craftsmanship, it could be divided as pressure-bearing style and non pressure-bearing. Recently, the most common one on the market is the non pressure-bearing vacuum tube style. Well, the brief introduction of solar water heater above may also confuse you, the following would emphasis on goods purchasing.
1. Brands: Customers should choose the foods produced from manufacturers with specialized production system. In this way, the goods you choose could have good quality and excellent after-sale service system.
2. Vacuum tube quality: Vacuum tube is the key part of the heater. Under the same external condition, the water temperature depends on the heat that vacuum tube gets. So when you are purchasing, be careful for the coating on the glass tube which inside the vacuum tube. The general colors are black, dark blue or dark grey. The high quality coating is usually with uniform color and no scratches.
3. Material selection and technical skills of insulating layer and inner container: Among the water tank and inner container, there is a layer of thermal insulation material which plays a very important effect to keep the water warm. The heat insulator made of polyurethane could be used more than 15 years.
4. Design of mounting: The solar stand should be with enough intensity and stiffness, otherwise the whole equipment would be easily fallen down.
5. Design of reflector: When customers are choosing the products, they should attention that whether the whole design makes the utmost of absorbing surface on the vacuum tube.
6. Technical matters: Firstly, different color of vacuum tube has different effect because of the absorbed layer. Secondly, most manufacturers do not put reflector to use as after a period using time, it could only become as a decoration there. Too much dirt retention leads no effects. And from the perspective of wind avoiding, we should better not use it. Then the insulating layer of water container is not the thicker the better. When it reaches to the critical thickness, the thicker one is useless.
In conclusion, solar energy products are getting more and more popular nowadays. They are not only environment friendly, but also energy-saving.
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