Sangle Solar Antifreeze should set a temperature of around 50 degrees.
The collector is an important element of the solar water heating system which must be exposed to the outside. If you directly choose a collector with anti-freeze function, you can avoid the risk of the collector freezing in the event of high temperatures. winter. Heat pipe vacuum tube collectors and all-glass vacuum tube collectors with internal tubes are all collectors with anti-freeze function.
Since the heated water does not directly enter the vacuum tube, the glass cover of the vacuum tube does not come into contact with the water and the working fluid capacity of the heat pipe itself is very small, so even in an environment of tens of degrees below zero, the vacuum tube will not freeze at high temperatures. Another type of sensor with freeze protection is the heat pipe planar sensor.
Detailed information:
The difference between ordinary flat sensors is that the heat pipes are used in the position of the heat absorption plate. Instead, a medium with a low boiling point and a low freezing point is used as the working fluid of the heat pipe, so the heat absorption plate will not freeze. However, due to the technical and economic performance of heat. The flat plate and pipe collector is not as good as the vacuum tube collector mentioned above, its application is not common yet.
A heat exchanger is installed in the solar hot water system. The heat collector and the hot side of the heat exchanger form the first cycle (or first loop), and low-freezing antifreeze is useful.designed for heat transfer. working fluid to get the antifreeze out of the system. The dual circulation system can be used in both natural circulation and forced circulation solar water heating systems.
Ifeng.com - Solar water heater
Ifeng.com - Solar energy frozen during prolonged cold days
Water heater wall mounted solar when not plugged in It can be used in rainy days, but on rainy days you can only have cold water.
Solar water heater is a device that converts solar energy into thermal energy, heating water from low temperature to high temperature to meet people's use of hot water in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat panel solar water heaters based on their structural shapes. Vacuum tube solar water heaters are mainly used, accounting for 95%from the domestic market. Household evacuated tube solar water heaters are composed of heat collecting tubes, water storage tanks, brackets and other related parts. The conversion of solar energy into thermal energy mainly relies on vacuum heat collecting tubes which use the principle of hot water floating. and cold water flows to cause microcirculation in the water.