Is a solar water heater better with a blue crystal tube or an amethyst tube

Amethyst tube is better than ordinary tube (blue crystal tube) absorption performance, but ** will also be a little higher, for ordinary users, blue crystal tube is enough, cost-effective, so blue crystal tube is a little more affordable, if you are a local tyrant, then choose amethyst tube or black crystal tube, three target tubes, etc.

It doesn't matter if it's good or bad.

Both Zijin tube and blue crystal tube adopt the coating technology of Professor Yin Zhiqiang of Tsinghua University.

In the entire Chinese solar industry, all the coating technologies of glass tubes and metal materials are taught by Yin Zhiqiang.

However, Zijin tube has a disadvantage, that is, because of the difference in the particle matter of its coating composition, it is easy to cause discoloration when exposed to the air for a long time. The color changed from red and golden to slightly grayish.

Such a change will reduce the thermal efficiency of the vacuum pipe.

Now there are three high purple gold tubes on the market.

There are also three-high blue crystal tubes.

Both of these tubes, no matter which one they are, work well.

And as long as the coating is done and the vacuum is pumped well, it will not cause discoloration due to empty drying or long-term exposure.

Finally, it should be noted that no matter what kind of tube, in the end, it is produced by people, and it depends on the production process.

There are several companies that have done well in China, including Huangming, Spectrum, and Xu Neng.

Whether it is a purple gold tube or an azulite tube, as long as it is three high, it can be used.

"Three highs" refers to high temperature resistance, cold resistance, and efficient absorption, and generally refers to the vacuum tube (generally a gradient membrane) made by the three-target interference membrane process

The coating of the general three executives is three layers, one layer of copper, one layer of stainless steel aluminum nitride, and one layer of aluminum nitrogen aluminum; There is only one material of coating for gradient film, which is aluminum, nitrogen and aluminum, and the performance of the three executives is relatively higher than that of gradient film. The coating of the three executives is very close to the nozzle, about 1 cm. The vacuum is as high as 10 minus 4 power.

The material of the solar ordinary tube, the three executives, and the tube in the tube should be made of high borosilicate glass according to the national standards. In fact, the coating technology of ordinary tubes is the same as that of tube-in-tube, which is the traditional crushing film technology, and the film layer is thicker. The difference between ordinary tube and tube-in-tube is that there is one more tube in the tube, which is closed at both ends and inserted into the vacuum tube.

The heat absorption effect of the three executives can be increased by 14%, and it is resistant to high temperature and cold.

Zijin tube is good. Blue gold tubes are ordinary tubes.

The Zijin tube is a type of vacuum tube used in solar energy. Using PEPAC multi-target interference membrane technology and adding purple gold coating, under the same conditions, it heats up more than 12% faster than ordinary three-star executives, and heats up faster. In the use of new coating materials and production technology, in the temperature rise, heat collection, life of the three major technical parameters have been maximized, the solar absorption ratio of Zijin tube is 11 percentage points higher than the national industry standard, heat collection technology has approached the theoretical limit of vacuum tube heat collection performance, reflecting the highest level of the local solar energy industry.

To the naked eye, the appearance of the ordinary tube and the three executives is dark blue, and the appearance of the purple gold tube is dark black (without light) from the inside of the tube, the ordinary tube is blue, and the three executives are red, and the purple gold tube is very red, and the purple gold tube is the kind of gold in the sun.