Solar water heater closed system 200 liters pressure BERG Z-PS5820

Solar water heater closed system 200 liters under pressure BERG Z-PS5820 is a closed-type solar system operating under pressure with a capacity of 200 liters. The system includes 20 borosilicate glass tubes and has an inlet for a heater.

• Tank material: stainless steel SUS304-2B with a thickness of 0.31–0.5 mm
• Outer tank: high-quality stainless steel with a thickness of 0.31–0.5 mm
• Insulation: polyurethane foam with a thickness of 50–55 mm
• Vacuum tubes: CU/SS-AL/N, 20 pieces, length 1.8 m, diameter 58 mm
• Frame: stainless steel with a thickness of 1.2–2 mm
• Working pressure: 0.6 Mpa
• Available accessories: solar controller, electric heater 1500W

The system captures up to 95% of sunlight thanks to the high-efficiency coating of the vacuum tubes. Even in less sunny weather, the vacuum tubes ensure effective operation of the heater.

Operating principle:

• Solar absorption: thermal energy is absorbed in the vacuum tubes and converted into concentrated heat.
• Solar heat transfer: copper tubes filled with heat transfer gas carry the heat to the main copper pipe.
• Solar heat storage: the thermal expansion of the gas transfers the solution (water or other liquid) to the main copper pipe, raising the temperature by 5–10 °C.

Thermal energy is transferred through a cyclic process of evaporation and condensation in the heat pipes, ensuring continuous heat transfer to the tank.

The vacuum tubes are the main energy absorbers in the system, converting sunlight into thermal energy for domestic hot water. These types of tubes are characterized by reliability, high efficiency, and low production costs.

Tank - heat exchanger

For optimal operation, the tank should be positioned above the collector to avoid backflow and heat loss at night. The tank operates without pressure, ensuring safety during operation.

The outer and inner walls of the tank are made of stainless steel with a thickness of 0.5 mm, type SUS304, certified for non-toxic use. The insulation layer of polyurethane foam with a thickness of 50 mm provides good thermal retention.

Stainless steel is a corrosion-resistant material processed through an advanced casting process that eliminates the risk of rusting.

• Independence from rising electricity prices
• Operation without the need for pumps, pipes, and additional devices
• Year-round use, including in winter with sufficient sunlight
• The materials of the stand and water container are made of stainless steel, preventing corrosion
• Temperature in the vacuum tube reaches up to 250 °C, and water is heated to 100 °C in about 3 hours
• The system operates without pressure and is completely safe
• The structure withstands hail up to 25 mm in size
• The absorbing surface of the collector absorbs about 93–94% of the solar rays
• The system continues to operate even if one of the tubes breaks, as long as it is sealed
• Low costs for connecting to the water system
• Minimal temperature losses due to the insulation of the vacuum environment and water-carrying pipes
• The design of the collector provides good wind resistance
• Effective operation at orientations other than the optimal south, due to the round shape of the tubes
• Up to twice as effective during the winter period compared to flat collectors
• Does not retain snow and dust

Instructions