Solar water heater in the winter will be broken glass tube?
If the temperature of 40 degrees a day, about a day to cool down, it takes about 3 days to fall to the original temperature of the water, not to mention, the water temperature of the cold water, or some of the original temperature of the water is still around 10 degrees. So, from the three point of view, the vacuum tube will not be frozen.
First, the quality of solar vacuum tube. General solar vacuum tubes are made of borosilicate glass, mechanical strength is relatively large, in addition to the solar vacuum tube can absorb heat
No, it's a vacuum tube. It's like a hot water bottle.
