How to recognize good and bad of the solar vacuum tubes
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Post time:03/15/2012
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Vacuum tube collector solar system components, such as the "heart" of the solar system is known, will impact on the lifetime and performance of solar vacuum tube collectors quality directly.
Vacuum tube collector solar system components, such as the "heart" of the solar system known, vacuum tube quality will directly affect the life and performance of solar collectors so that the quality of vacuum tube was the top priority of the majority of consumers, that after you learn different identification methods:
Identify vacuum quality of the pros and cons first look at the appearance, the appearance of high-quality vacuum tube:
A. the surface smooth, clean, no stains in the tube, no gas, no scratches, no plan membrane phenomena (this phenomenon will affect the collection efficiency and aesthetics).
2. the coating color blue, black all color. But the black does not mean, that a good quality vacuum tube, to cover up because some manufacturers, the diverse, often the movie from pure black. In fact, the vacuum tube is inevitable color error value is, affect not the separation performance of vacuum tube.
, Baked the complete mirror, smooth and translucent, black, black phenomenon to eliminate.
4, is currently on the market the best of the three tubes: high-temperature tube, efficient pipe, alpine tube. Layer of high-temperature tube than theordinary tube length (distance from the 
nozzle about 1cm), this tube high temperature, anti-attenuation is particularly strong, the requirement of 400 ° C hot air drying the film not older, not shed, do not change color. Efficient pipe position out of the nozzle by about 2.5 cm, this tube of ultra high absorption, the less heat loss, heat quickly, high thermal efficiency. While both alpine tube high efficient pipe thermal efficiency, heating benefits, less heat loss, as usual from hot water under the condition of-30 ° C quickly. The consumer can choose the various vacuum tube according to the different regions.
5. With the naked eye is that is dark red inner tube, which shows that the ground of the metal is copper, can this negative pressure in the cold,-30 ° C to work as usual from hot water.
High-quality vacuum tubes are usually more than 15 years, is directly connected to the life of the solar system, in the case of variations in the shape of most manufacturers, consumers should keep open the eyes carefully identified.
