The pressurized water tank has no exhaust hole, therefore, it must bear the pressure came from tap water and hot water. When use, the hot water comes out because of water pressure. Vacuum tube absorbs solar energy, and conductive copper pipe transfers the heat into the pressurized water tank. In this case, the water inside the tank becomes hot. No water in the heat pipe makes the whole system could bear pressure.
Advantages of Pressurized Solar Water Heater:
- The system is pressurized.
- Keep a constant temperature of water in the tank.
- Avoid the problem came from water level controller malfunction which could cause water flow out.
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