The solar water heater or geyser relies on warm water rising, a phenomenon known as natural convection, to circulate water through the evacuated glass tube collector and to the tank. Hot water storage tank is located above the absorber evacuated glass tubes. As water in the absorber heats, it becomes lighter and naturally rises into the tank above. Meanwhile, cooler water in the tank flows downwards into the absorber, thus causing circulation throughout the system.
SOLAR WATER HEATERS: HOW THEY WORK FOR YOU.
Solar water heaters provide your home or business with really hot water. But how do they do it?
Here is a brief explanation to orient you with the components of the kind of water heater we carry. We hope this guide will increase your appreciation for this remarkable piece of technology.
GENERAL OVERVIEW
General Explanation of System’s Working Principles
1. Unheated water from source with a certain pressure (eg: 3 bars) flows into the system
2. As the water gets heated up, certain pressure is built up in the main water tank (eg: 1 bar). This is due to the difference in pressure between the unheated water and the heated water and the principle of hot water rises while cold water sinks
3. As the heated water flows from the main water tank’s outlet pipe (about 3/4 inch in diameter) to the house’s pipes (about 1/2 inch in diameter), pressure is further increased to about 1 bar to 2 bars. This pressure is adequate enough for a pleasant showering experience and for use in the Jacuzzi. The better the house’s piping system, (eg: the shorter the distance from the main water tank to the house’s pipe), the higher the pressure generated in the heated water.
KEY COMPONENTS OF THE WATER HEATER.
Vacuum Tube Collector The Vacuum Tube Collector consists of the following parts:
1. Inner glass tube Borosilicate glass (Pyrex®) tube with the outside surface of the inner tube coated.
2. Selective absorbing coating Layers of aluminum-nitrogen with aluminum base coated using hit-tech magnetron splutter process.
3. Vacuum Gap Jacket between outer and inner tubes is evacuated to form the best insulation and to prevent heat loss.
4. Cover glass tube Concentric to the inner tube, the cover glass tube protects the entire glass tube.
5. Supporting component Stainless steel metal pieces acts as a support for the glass tube.
6. Remnant Gas absorbent
7. Absorbing film
