Solar Glass Tube
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Evacuated tubes are the absorber of the solar water heater. They absorb solar energy converting it into heat for use in water heating. This type of tube is chosen for its reliability, performance and low manufacturing cost. Each evacuated tube consists of two glass tubes made from extremely strong borosilicate Glass. The outer tube is transparent allowing light rays to pass through with minimal reflection, The inner tube is coated with a special selective coating (AL-NAL) which features excellent solar radiation absorption and minimal reflection properties, The top of the two tubes are fused together and the air contained in the space between the two layer of glass is pumped out while exposing the tube to high temperatures.
Glass Evacuated Solar Collector Tube
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Our range of Glass Evacuated Solar Collector Tube is a key factor of Solar Collectors. It is designed with two glass tube each. Solar Evacuated Glass Tube is designed such that it can passively track heat from the sun depending on its orientation. The shape of the tube provides absorption when compared to flat plate collectors for various reasons. FeaturesHigh efficiency Able to be used in all climatesReliableEasy plug-in installationMaintenance freeCorrosion resistantIdeal for commercial applications ApplicationsIndustrialCommercialDomestic Technical Data 1. Material 1.1 VACUUM TUBE must be made of borosilicate glass 3.3 according to ISO 3585. 1.2 Stagnation parameterStagnation parameter : Y≥ 175moC/KwY : (ts-ta)/Gts Stagnation temperatureta Environmental temperature (8oC≤ ta ≤ 30oC)G : Solar radiations (G≥ 800 W/m2) 1.3 Solar radiance exposure for obtaining a preset water() temperature rise in an all-glass ,evacuated solar collector tube under stagnationSolar radiance exposure : H≤ 3.8MJ/M2Solar radiations : G≥ 800 W/m2Environmental Temperature : 8oC ≤ ta≤ 30oCInitial water temperaturess : ≥ environmental temperature 1.4 Coefficient of Average heat loss ULT≤ O.8w/m2oC 1.5 The air pressure of the vacuum jacket - p≤ 5 X lO2Pa 1.6 Anti thermal shock - The evacuated tube must be no damage after 3 times of thermal shock between ≤ 25oC and ≥90oC by putting the evacuated tube into water of temperature ≤ 25oC and ≥90oC by turns three times. 1.7 Anti- pressure - The inner tube of the evacuated tube must stand for pressure of 0.6 Mpa. 1.8 Anti-hail - The evacuated tubes must not be damaged by hails of0~25 mm. 1.9 Viible Quality SpecificationsThe SELECTIVE COATING is uniformly coated on the inner glass tube of the evacuated tube without scratches and desquamation.The undertone SELECTIVE COATING near the open end of the evacuated tube mustb e≤3% of the full length of the evacuated tube.The inner glass tube support must be deposited rightly without loosenessThe full length of the evacuated glass tube is the distance measured from the mouth of the open end to the point of 0= 15mm of the close end. The deviation of the full length must be ≤ ± 5mm. The deviation of the diameter must accord with I.SO 4803:1978.The bow of the evacuated tube must be ≤0.3%.The length of the sealing mouth of the vent-pipe (see "8" in Draft of Structure) S ≤ 15 mm 2. Package and Storage 2.1 The evacuated tubes must be packed into carton boxes with polystyrene cushion between them. 2.2The evacuated tubes must be stored in dry and ventilated warehouse. Specifications Dimeter of i outer/inner tube (mm) Lenth (mm)PackageSelective Coating 47/37 1200 Carton AI-N/AI 47/37 1500 Carton AI-N/AI 47/37 1800 Carton AI-N/AI 47/37 1950 Carton AI-N/AI 47/58 1200 Carton AI-N/AI 47/58 1500 Carton AI-N/AI 47/58 1800 Carton AI-N/AI 47/58 1950 Carton AI-N/AI
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Solar Glass Tube
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Solar water heaters can operate in any climate. Performance varies depending, in part, on how much solar energy is available at the site, but also on how cold the water coming into the system is. Only during rainy season you will need a conventional backup system (Electric).
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