Three Target Vacuum Tube
Advantages
1.This solar evacuated tube adopts special interference layer, so it can bear the high temperature up to 300℃
2.The solar selective coating absorbs most sunlight and suppresses the thermal emittance loss from the coating. The absorbing wavelength ranges from 0.35μm to 3.0μm
3.The three target vacuum tubes have excellent performance of absorbing and super heat preservation, especially suit to cold areas.
4.High borosilicate glass with coefficient of linear expansion 3.3×10-6/℃ complies with international ISO1776 acid proof Grade 1, ISO695 alkali proof above Grade 2. This solar evacuated tube owns high resistance of corrosion and long service life.
5.The three target vacuum tubes are aligned in parallel, the mounting angle depends upon the latitude of your location. In a North South orientation the tubes can passively track heat from the sun all day. In an East West orientation they can track the sun all year round.
6.The efficiency of an evacuated tube water heater depends on a number of factors, and the important one is the level of evacuated radiation in your region.
Description
The solar evacuated tubes are used for absorbing sun radiation and converting it into thermal energy. The three target vacuum tubes are the updated version of our normal vacuum tubes. They are usually suitable for pressurized solar water heating system, such heat pipe solar collector and U pipe solar collector.
Our solar evacuated tubes have many good advantages of reliable and stable performance as well as low manufacturing cost. So far, the vacuum tubes are popular in Germany, Australia, France, Japan Canada, China and the UK.
Structure of Solar Evacuated Tube
1. Our three target vacuum tubes are made of borosilicate glass, featuring in rigidity and excellent light transparency.
2. The wall thickness of the glass will have an influence on the strength, lifespan and also the cost. Our evacuated tubes are manufactured with a 1.6-2.2mm thick wall to guarantee excellent strength and resilience to hail impact.
3. The solar evacuated tube should pass through the test by dropping a steel ball onto the tube from different heights, so as to confirm the strength of the tubes.
4. The three target vacuum tube is the core component of the solar water heating system. Its performance relies on the actual film coating technology. Our company has adopted a new graded coating technology of Qinghua University, and tube raises the heat.
Parameters of Solar Evacuated Tube
|
Structure |
All-glass double-layer coaxial |
| Tube material |
High quality borosilicate glass 3.3 |
| Outer tube diameter and thickness |
Φ=47±0.7mm & =1.6mm
Φ=58±0.7mm & =1.6mm
Φ=70±0.7mm & =2.0mm |
| Internal tube diameter and thickness |
Φ=37±0.7mm & =1.6mm
Φ=47±0.7mm & =1.6mm
Φ=58±0.7mm & =1.6mm |
| Tube length |
500mm 800mm 1500mm 1800mm
1900mm 2000mm 2100mm |
| Absorptive coating |
Structure |
ALN/AIN-SS/CU |
| Sediment method |
Magnetron sputtering plating |
| Absorptance |
a=0.93-0.96(AM1.5) |
| Emittance ratio |
Σn:=0.04-0.06(80℃±5℃) |
| Vacuum tightness |
p ≤ 5.0 × 10-3 Pa |
| Stagnation parameter |
Y=270-300M2. ℃/kw |
| Solar irradiation under stagnation |
Φ47 H≤3.7MJ/m2, Φ58≤4.7MJ/m2 |
| Average heat loss coefficient |
ULT=0.72W(M2. ℃) |
| Lifetime |
15years |
| Hail resistance |
Φ25mm/Φ40mm |
Jinyi Solar Energy Technology Co., Ltd. is a professional three target vacuum tube manufacturer and supplier in China. We not only supply solar evacuated tubes, but also offer solar collectors, solar storage tanks as well as solar water heaters. We supply high-quality solar water heaters and evacuated tubes with reasonable price, and also offer OEM service and responsible after-sale services. If you need our solar evacuated tubes, please contact us directly.
