How to identify solar vacuum tubes
. Three voices: knock, the sound is very different, good sound tube is very brittle, and sound, common tube sound pollution, no echo. Four strong: Emperor Ming of the pipe diameter ball thirty meters, from the height of a vertical drop of fifty cm if the vacuum tube is not broken, you can get to the tube has been common to try it, you will no doubt.
You see the ordinary vacuum vacuum tube and tube to look Himin is the same, but I suggest you from about four to identify the solar vacuum tube: a look at the color: ordinary vacuum tube is not black, the naked eye can see inside is very bright, it will lead to the absorption of heat and reflection back. The thermal efficiency is low, the vacuum tube, the black emperor also shiny, shiny, low reflectivity two weigh weight: the ordinary pipe and pipe Himin's words, you will find at least half a pound of Emperor Ming of the vacuum tube more than other brands of single.
Recently, the store to consult more solar energy, they are particularly concerned aboutSolar vacuum tubeAs we all know, the vacuum tube is the core component of solar energy, like a car engine, a human heart, if the thermal performance of vacuum tube is not up to, not 3 or 5 years, bought solar will become "cold water", is very painful
