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Question:

Solar vacuum tube can not be used to cover the summer

The summer sun long time, can not use hot water, vacuum tube can not be covered with water, this water tank will be much smaller. But then cover cloth often friction vacuum tubes, will not damage the vacuum tube?

Answer:

Does not damage the vacuum tube. Because now the vacuum tube is made of 3.3 borosilicate glass, not ordinary household glass, can resist the diameter of 3cm hail. So the friction of the cloth can be ignored. The water temperature can be used to cover small summer to live. This is the right thing to do.
Good idea. Solar energy is too high is not a good thing. He will shorten the life of hot water pipes. And the mixing valve pad etc.,Absolutely no problem with clothing. But we're all covered with a sunscreen. This can reduce wind resistance.
Summer is the need to cover up! Vacuum tube is not inclined, you can step on the ~ ~ ~ ~

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