Bought a solar energy today, on-site installation, buy the tube, but the installation when I asked him this is what he said is the tube, the core tube (or purple purple tube is not clear is this pipe) he said purple core tube than the tube in tube well. At that time, anxious to engage in other did not think. It feels strange now. It is to buy the tube in the tube, we help a tube which good?
Tube in tube cost far more than a single vacuum tube is much higher, then water production effect, take the purple purple core compared with the core pipe pipe, purple core tube is product of the common three executives of the upgrade, high temperature, cold and fever, at the same time, the vacuum tube also has the characteristics of high strength. Can withstand 2 cm of ice watch does not break bud
The purple core tube than the single purple core tube is much better than its high temperature resistance, high strength and alpine water production effect is better, just like your winter clothes, wear a sweater, you will feel cold, two sweaters will be warm, in fact the vacuum tube is the same, you should now know the answer!
It depends on the tube you are at the time of the tube is an ordinary tube, or a three pipe in the tube, then the top three executives in the tube (that is, in the tube), if the latter is certainly fooled,
