Solar water heater open system 200 liters pressure-free BERG NSF200

Solar water heater open system 200 liters without pressure BERG NSF200 represents a solar system of open type with a capacity of 200 liters. It includes mounting elements and silicone rings, an inlet for the heater, and a supplementary tank with a stainless steel float with a volume of 5 liters. The system features 20 borosilicate glass tubes.

• Solar system - open type
• Capacity - 200 liters
• Mounting elements and silicone rings
• Heater inlet - 1 piece
• Supplementary tank with stainless steel float - 5 liters
• Borosilicate glass tubes - 20 pieces

Material:

• High-quality stainless steel SUS304-2B, thickness 0.31–0.5 mm
• Outer tank made of high-quality stainless steel, thickness 0.31–0.5 mm
• Insulation: 50–55 mm polyurethane foam
• Vacuum tube: CU/SS-AL/N – 20 pieces
• Frame: stainless steel/aluminum alloy, thickness 1.2–2 mm
• Filling tank: 3L/5L stainless steel
• Reflector: stainless steel/aluminum alloy (optional)
• Available accessories: filling tank, solar controller, electric heater, magnetic rod, thermostatic mixing valve

Solar systems of this type capture up to 95% of sunlight thanks to the high-efficiency coating of the vacuum tubes. They operate effectively even in less sunny weather, as the vacuum tubes have strong absorbing properties.

Operating principle:

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

This system quickly and efficiently transfers the absorbed thermal energy through the vacuum tubes to the collector core. The liquid boils at the base of the tube and rises in a gaseous state. After releasing heat in the main copper pipe, it condenses and returns to the base, with the process continuously repeating.

The vacuum tubes are energy absorbers for solar water heaters that convert solar energy into heat for hot water use. This type of tube is preferred due to its reliability, high efficiency, performance, and low production costs.

Tank – heat exchanger

For optimal operation of the system, the tank should be positioned above the collector. In the absence of a suitable height difference, temperature loss occurs at night due to backflow, where the hot liquid returns to the collector and cools down. The tank is designed to operate without pressure, making it safe during operation.

The water temperature in the system can reach 90–95 °C, so the outer and inner walls of the tank are made of stainless steel with a thickness of 0.5 mm, type SUS304, certified for toxin-free use. Insulation is provided by 50 mm polyurethane foam, which effectively retains heat.

Stainless steel is a corrosion-resistant material used for manufacturing tanks. It is processed with an advanced casting process that eliminates the risk of rusting.

• Independence from rising electricity prices
• Operates without the need for pumps, pipes, and additional devices
• Year-round use, including winter with sufficient sunlight
• The materials of the stand and water container are made of stainless steel, which eliminates corrosion
• The temperature in the vacuum tube reaches 250 °C, and the water in it – up to 100 °C in about 3 hours
• The system operates without pressure and is completely safe
• The construction withstands hail up to 25 mm in size
• The absorbing surface absorbs about 93–94% of solar rays
• Operates even if one of the tubes breaks, as long as it is sealed
• Low costs when connecting to the water system
• Minimal temperature losses due to vacuum insulation and water transport tubes
• The collector design provides good wind resistance
• Effective operation at orientations other than 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