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Making full use of natural energy is the global permanent energy trend. The latest and most advanced series of Super Heat Conduction Metal Vacuum (SHCMV) Tube of "Guangmang" brand, developed by Wuxi Guangmang Solar Energy Technology Co., Ltd., is a totally new generation of hi-tech solar collector instead of all-glass evacuated solar collector tube. With the advantages such as high thermal efficiency, quick start-up,good anti-freezing function, excellence in resistance to cold and hot shock,all the year round operationand long lifetime, the SHCMV tube will not be broken and will seldom be effected by the variation of the climate. Its working temperature ranges from -50 ℃ ~ 420 ℃ . Guangmang series of SHCMV tube is not only the core part of the new generation solar water heater, but can also be widely used in many fields, for example, household space-heating, cooling and air-conditioning system, sea water desalination, aquiculture, material drying, swimming pool heating, etc.
The heat absorbing material for Guangmang series of SHCMV tube is the specially formed aluminum plate, on which the solar energy selective absorptive coatings are sputtered by the way of magnetic control. The SHCMV tube has solved perfectly the stress problem of medium & high temperature hot-press seal for glass-metal joint by adapting laser welding technique and the special metal connection.
The structure and name of parts are shown in illustration. |
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The new SHCMV Tube is a revolutionary breakthrough in solar thermal-collecting technology as well as the symbol of a great leap in solar thermal utilization field after the mankind's continuous researches ages and ages.
The very name of the SHCMV tube suggests that the tube is a kind of advanced solar thermal collector by the way of metal heat conduction, vacuum heat insulation, and super heat conduction by gravity. The tube is assembled with red copper pipe core of high efficiency in heat conduction, specially formed thermal absorbing aluminum plate, high-quality borosilicate glass, high temperature selective absorptive coatings sputtered by magnetic control and the medium & high temperature hot-press seal technology of the metal-glass connection. These are the most advanced usages and the perfect combination of so many technologies such as optics, thermodynamics, chemistry, metallography, electromagnetism, material science and environment-energy science inside the tube's slim body of Φ70?/span>700mm. Now, the solar thermal utilization technology has been listed in one of the major supporting projects of 2001 scientific innovation fund of China Ministry of Science and Technology.
At present, many defects are found out in all-glass evacuated solar collector tube that used in common solar water heater after 10 years of service. The new generation of Guangmang series of SHCMV tubes successfully gets rid of these defects by the following advantages:
1. Heat-pipe conduction, no water inside,thus it is successfully prevented from the defects of tube block and low power output caused by water fouling and deposits of dust and sand.
2. It prevents the tube from being easily broken caused by the volume expansion when the water in tube freezes in the frigid seasons.
3.Low thermal capacity makes the tube start up quickly. Energy inside tube can be taken out within only 2 minutes under sunshine. The insulation temperature of the heat-pipe can reach 250℃. The average heat efficiency can still be more than 50% even under -50℃.
4.High efficient selective absorptive coatings and vacuum heat insulation technology ensure the tube to get higher heat output in cloudy weather and in moist area, especially in winter. 5.Solar collecting plate is installed and sealed inside the tube of high-quality borosilicate glass with 5?/span>0-3Pa of vacuum, so it cannot be corroded even in moist area.
6. It perfectly solve the fatal defect of the common all-glass vacuum tube solar water heater, which will not run if one of the tubes is out of work.
Guangmang series of SHCMV tube is not only the leap and breakthrough in the technology of solar thermal utilization, but also the inevitable selection of the times. It really makes true so many advantages of high thermal absorbing efficiency, quick heat conduction, wide usages and long lifetime. With its excellent quality, metal heat exchanging end, crystal-like translucent borosilicate glass tube, equipped with the unique and perfect formed aluminum heat absorbing plate, Guangmang SHCMV tube stands out majestically from the others just like a famous Chinese ancient poem saying," Once you reach the top of peak, every other mountains just seems like hills."
SHCMV tube is mainly assembled with heat-pipe, borosilicate glass tube, heat-collecting plates, metal cover, getter, heat exchanging end and aluminum safety-protection cap, etc. The magnetic-control sputtering selective absorptive coatings on the heat-collecting plates has a high absorption coefficient of more than 94%, and the emission tube is more than 5?/span>10-3Pa, equipped with long effective air degassers to keep the setting vacuum degree inside the tube a constant. The structure and name of the parts are shown in illustration.
Operation principle: When sunshine and infrared ray reach the heat absorbing plate of SHCMV tube, the inner X agent of heat-pipe is vaporized at 40℃, the vapor flows to the heat exchanging end continuously, conducting the heat energy to the water in the tank or other low temperature object. Thus the vaporized X agent turns into liquid, returns to the original position and completes an operation circle.
Technique specification:
Material:borosilicate glass according to ISO3585: 1991; transmittance of borosilicate glass:≥ 0.92. Absorbance of solar selective absorptive coating:α≥0.94; Hemispherical emittance : ε≤0.08; Getter according to GB/T 9505-1998.
Start-up temperature : No more than 25 ℃ .
Start-up time: no longer than 2 minutes under normal sunshine.
Isothermal performance: The temperature tolerance between any 2 random points does not exceed 2℃after 5 minutes of working.
Low temperature resistance: No breaks at -50℃.
Air pressure: ΔP≤5?/span>10-3Pa.
Heat impact resistance: No damages after over 3 times' alternative impacts of cold water below 25℃ and hot water over 90℃.
Pressure resistance: can withstand 0.6 Mpa.
Hail resistance: no damage by the impact of ф35 mm hail.
Appearance standard: the color of the selective absorptive coatings should be even, and the coatings should have no wrinkles and peelings. The support parts inside the tube should be correct and tight.
The allowed tolerance of borosilicate glass tube's diameter should be in accordance with ISO4803: 1978.
Camber of the borosilicate glass tube should be no more than 0.3%.
The transection of the borosilicate glass tube, which is 40-60mm away from flange end, should be round. The ratio of the longest to the shortest radial dimensions of the borosilicate glass tube should be no more than 1.02.
The diameter of the heat exchanging end is ф14mm, and should be matched with the standard. |
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Email: jackchina@21cn.net |
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