unpressurized solar water heater

Inner tank: Pressurized food grade SUS304/2B stainless steel with optional 0.31mm, 0.35mm,0.40mm,0.50mm thickness;

Outer tank: First choice: Aluminum zinc painted steel cover with button inside (silver, white) , strong and anticorrosion effectively welded by argon arc; Second choice: SUS304-2B stainless steel with optional 0.31mm, 0.35mm,0.40mm,0.50mm thickness;

Capacity: 90/108/120/135/1144/162/180/216/270/288/306/324L;

Vacuum tube: 3.3 Pyrex glass, magnetron sputtering ammonia- aluminum dual absorption coating with a thickness of 1.6mm, diameter 47or 58mm and length 1500or 1800mm, resisting 28mm hail;

Tube quantity : 15,18,20,24,30,32 and 36PCS;

Heat insulating layer: improved polyurethane integral foaming with thickness 50-65mm;

Frame: First choice, coated galvanized steel with 1.50mm thickness; second choice, stainless steel SUS304/2B with optional 0.31mm, 0.55mm,0.88mm,1.10mm thickness;

Fasteners: stainless steel screws

Seal: imported silicone rubber polymer ringing to connect and seal them;

Temperature: 45-95 degree Celsius, temperature is over than 40-54 degree in the winter

Pressure: 0Pa

Heat preservation: 72hrs

Hail resistance: 28mm

Non-pressurized solar water heater principle

The non-pressurized solar water heater thermo-siphon system, its storage tank and evacuated tubes are installed as one unit on building roof. The storage tank is connected with the solar water heater, and many all glass evacuated tubes are inclined insert into the tank. The heat gathered by the evacuated tubes heats the water inward the storage tanks. Hot water goes into the storage tanks cause hot water rise up high. And cold water will go down into the evacuated tube to be heated again. Run by natural circulation, the system can work without electricity. The circulation heats the water in the tanks continually. The hot water flow rate of this kind mainly depends on height difference between the water tank and the hot water shower head.

Principle of thermosyphon system

Because of the larger proportion of hot water than cold water, cold water flows downward and hot water goes upward. The water will be heated continuously between water tank and vacuum tube. In other wards, hot water always floats on cold water. The hot-water flows to the water tank from the vacuum tubes. Because of the proportion, cold water flows to vacuum tubes from the water tank. The cold water is heated in vacuum tubes. After it becomes hot water, it flows to water tank again. The water circulates constantly between water tank and vacuum tubes; the cold water in water tank will be hotter and hotter. Finally, all cold water will be heated to be hot water. This is the heating course of cold water.