Non-pressure solar water heater
This is a kind of solar water heating system that solar collector and storage are connected together with the cylinder storage on the top and collector panel on the bottom. There is no need of pump to push the fluid and no need of pipeline between the collector and storage. It is a simple and safe solution to get heat power from the sun.
Compact solar water heaters rely on the natural circulation of water between the collector and the tank or heat exchanger. In this type of installation, the tank must be located above the collector. As water in the vacuum tubes is heated it becomes lighter and naturally rises into the tank, meanwhile, cooler water in the tank flows down to the bottom of the vacuum tubes, causing circulation throughout the system. This non- pressure solar system relies on a natural principle –”Thermo siphon”. As the sun’s rays hit the evacuated solar collector tubes , the temperature of the water in the tubes rise to certain heat levels, making the water less dense or lighter. The hot water naturally moves up to the top of collector and through out evacuated collector tubes converting to the storage tank. The colder water in water tank, then moves down to the bottom of the collector. This process is continuous thermal processing, and 100% natural in heating water from the sun with evacuated specially designed vacuum tubes.
|Water tank||Inner tank||SUS304-2B / SUS316L|
|Outer tank||SUS201,SUS304-2B or galvanized steel|
|Insulation||Polyurethane foam (50/55/60mm)|
|Evacuated tube||High Borosilicate-silicon 3.3|
|Absorber Coating||Aluminum,stainless steel,copper|
|Frame||Frame material||SUS201 or SUS304 or Aluminium or galvanized steel|
|Maximum operation pressure||0.6 Bar|