The current national standard for evacuated solar collector tubes is 1.8 meters, which provides good versatility and is easy to maintain. The 2.1 meter length is usually produced by manufacturers to meet market demand. Increasing the length means increasing the heat collection area. , under the same lighting conditions, the 2.1 produces more hot water and has a higher water temperature. However, the 2.1 has low versatility and the maintenance cost is higher than that of the 1.8 meters.
Seventh stage solar tubes. to the third stage Length
The optimal length of the vacuum tube is generally based on the optimal ratio of the water capacity of the inner tube to the heat absorption area of the film layer. It can heat it. Water into the vacuum tube in the shortest time and carry out heat exchange timely. The heated water in the vacuum tube is transferredto the water tank. At present, those with a length of 1.8 meters are mainly used in the market, there are also ones with a length of 2.1 meters, and there are also ones with a length of 1.6 meters (relatively few many). were eliminated. If the vacuum tube is inserted vertically, the 2.1 meter long one will heat up quickly and exchange a large amount of hot water. Because the heat exchange between hot water and cold water in the vacuum tube is based on the natural siphon principle, hot water floats and cold water sinks. The vacuum tube is inserted vertically. The longer the vacuum tube, the more obvious the cold and hot. the stratification of the water is greater and the more hot water is exchanged.
7.5 meters. The floor height of a general community house is 3 meters, and if it reaches the top of the 7th floor, it will need a length of 7.5 meters. The size of solar hot water pipes is generally: 1.6 meters 47 or 58,6 feet 47 or 58. Normally 20 gauge pipe is used. It depends on where the solar water heater is placed on the 6th floor. If it is far away, it must be at least 10 meters, and the upper and lower water pipes are the same. Solar tubes and vacuum tubes of solar water heaters are the essential components of solar water heaters and are known as the "heart" of solar water heaters. The quality of vacuum tubes directly affects the lifespan and performance of solar water heaters. the solar industry has also stimulated the development of vacuum tube companies.