Is there any water in the solar vacuum tube
In the North alkaline water area is easy to scale, the impact of efficiency, and even burn, and the price is relatively high. The water type is a relatively mature product, the disadvantage is the vacuum tube in water, there may have burst, frozen winter summer, to complete the control circuit to prevent the dry summer sun burst, freezing cold in winter.
The solar water heater is divided into two kinds, one is the water type, another kind of pressure, it should be said that the pressure on some of the more advanced technology, there is no water in the vacuum tube, not burst, does not freeze, especially suitable for high latitudes.
Pressure type with pressure operation, the upper and lower water pipeline pressure, circuit control is relatively simple, the flow is also relatively blunt. However, the pressure bearing has a fatal disadvantage, that is, the temperature of the hot plate inside the bucket is very high,
