What is a double vacuum superconductor?
Metal heat pipe vacuum tubeA heat pipe is arranged in the middle part of the heat collecting wing, and the metal heat pipe type vacuum tube has the advantages of low heat capacity and quick start by the gravity closed circulation medium. However, the tube still has a lot of disadvantages: such as metal cover heat sealing joints due to two kinds of material thermal expansion coefficient different from the glass tube, easy to leak, the life is very short, the manufacturing cost is high.
Double vacuum tube""Double vacuum tube" is in the glass vacuum tube on the basis of the addition of a glass condensation end, successfully overcome the various types of heat pipe has many disadvantages. To avoid the pipe explosion, cracking at the same time, the formation of high temperature accumulation region is conducive to the heat transfer medium evaporation and accelerated molecular motion, give full play to its latent heat, so as to further improve the transformation efficiency of the media. With all glass vacuum tube to improve the thermal efficiency of up to 25%, give full play to its efficiency.
Pseudo heat pipeThe utility model relates to a heat pipe which is inserted into a metal heat conducting pipe in the whole glass vacuum tube cavity. The main problem is the low thermal efficiency: the heat transfer from the inner wall of the pipe to the metal heat pipe is achieved by the thermal radiation, because of the general trend of heat conduction resistance will lead to low thermal efficiency and aging film. On the other hand, the short life and high cost of the metal heat pipe is not conducive to the development of the tube.
Principle of various heat collecting tubesAll glass vacuum tubeAt present, a large number of solar water heater market glass vacuum tube, mainly because of its simple processing, low cost. However, all glass vacuum tube or there are many unsatisfactory areas: direct water lumen rely on natural circulation heat, has large heat capacity, slow start, water tank empty after the lumen of the hot water can not make full use of waste, North Water in the vacuum tube is easy to cause the ice volume expanding lumen. Due to the relationship between the gravity deposition of the lumen is full of red rust water, black sludge, colloidal suspension is a large number of bacteria breeding ground, the nitrite produced on the human health is extremely unfavorable, does not meet the health requirements. The wall fouling not only unsanitary, lumen filled with solid dirt is not natural circulation, therefore, all glass vacuum tube natural circulation with the accumulation of effective length increased more with more short, the thermal effect is getting worse, all glass vacuum tube facing elimination.
