Solar vacuum tube burst repair?

Jiangsu Taiyangbao New Energy Co., Ltd. is a well-known (well-known) solar water heater brand, a national protected trademark, a leader in China's solar photovoltaic power generation and energy storage technology, a national standard drafting unit, and a national high-tech enterprise specializing in solar photovoltaic, thermal storage utilization, and research and development
What is the reason for the burst of the solar vacuum tube of Taiyangbao?
1. Hot and cold shock: In daily life, those who have used glass water glasses should know that pouring cold water into a cup that has just been filled with boiling water, or pouring boiling water into a cup that has just been filled with cold water, can cause the glass glass to crack. The same is true for vacuum tube solar collectors. Due to certain reasons, such as long-term exposure to the sun, adding water at noon in strong sunlight can cause the vacuum tube orifice to crack.
2. Excessive pressure: Due to improper selection of water pumps, excessive head, or the use of tap water pipe network pressure, the glass pipe is subjected to excessive pressure, resulting in pipe explosion. In addition, the one-way valve of the water inlet pipe is not well sealed, especially when the water tank is lower than the heat collector, resulting in negative pressure in the system, and it is also very easy to burst the pipe.
3. Stress: The vacuum degree of the vacuum tube is insufficient, and the thermal insulation performance is not up to standard. In winter, when the temperature is low at night, the water in the vacuum tube freezes due to the temperature drop, causing the vacuum tube to burst. In addition, the incorrect installation position of the exhaust valve in the system leads to poor exhaust, resulting in air resistance. After the system is filled with water, the maximum stress at the pipe orifice will be close to the applicable stress, which may cause pipe explosion; The installation angle of the system is incorrect, and the solar collector is not installed on the same plane, resulting in stress between the vacuum tube and the header. When the stress limit is reached, it is also easy to explode the tube.
4. Air drying: Due to pipe blockage caused by pipe connection or incorrect valve operation, water cannot flow into the vacuum pipe, resulting in pipe explosion due to air drying.
5. Scale: The temperature inside the vacuum tube can easily reach 80 to 90 degrees Celsius, which is prone to scale formation. It adheres to the surface of the header and vacuum tube. The thermal conductivity of the scale is small, and the thickening of the scale layer where it is located prevents the heat exchange between the vacuum tube heat absorber and the heat conducting fluid inside the tube, resulting in a certain temperature difference between the inside and outside of the scale. When the solar radiation is good, the outer layer of the scale has a higher temperature, which forms a large temperature difference with the inner layer, causing scale cracks, The cold liquid in the tube enters the inner wall of the glass along the crack, which is easy to cause tube explosion.
6. Quality defect of vacuum tube itself: Generally, borosilicate glass is used for vacuum tube collectors, but the expansion coefficient is greater than 3.4 × 10-6 borosilicate glass is not easy to process into vacuum tubes. Due to changes in glass composition and mechanism, sudden changes in performance occur, resulting in tube explosion, which results in tube explosion.

The above content is organized by Superb heater Company, super heater. Mainly professional production: industrial heating elements, temperature measuring elements, production equipment, accessories, and raw materials such as tubular heaters, tubular heaters, belt heaters, ceramic heaters, silicone rubber heaters, thermocouples, etc.

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