Shandong Longpu Solar Energy Co., Ltd.
Enamel hot water storage tank manufacturer
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Glass evacuated tubes are the key component of the solar collectors. Each evacuated tube consists of two glass tubes. The outer tube is made of extremely strong transparent borosilicate glass, that is able to resist impact from hail up to 25mm in diameter. The inner tube is also made of borosilicate glass tube, but coated with a special selective coating which features excellent solar heat absorption and minimal heat reflection properties. The air is withdrawn (evacuated) from the space between the two glass tubes to form a vacuum, which eliminates conductive and convective heat loss.
In order to maintain the vacuum between the two glass layers, a barium getter is used (the same as in television tubes). During manufature this getter is exposed to high temperatures which causes the bottom of the evacuated tube to be coated with a pure layer of barium. This barium layer actively absorbs any CO, CO2, N2, O2, H2O and H2 outgassed from the tube during storage and operation, thus helping to maintaining the vacuum. The barium layer also provides a clear visual indicator of the vacuum status. The silver coloured barium layer will turn white if ever the vacuum is lost. This makes it easy to determine whether or not a tube is operating correctly.
l Structure:Three target
l Outer Diameter of tube : 125mm,137mm
l Inner Diameter of tube :111mm,121mm
l Thickness of tube:3.0mm
l Length of tube :566/600/700/850/1860/2160mm (from 566mm to 2160mm)
l Material of tube:Borosilicate Glass 3.3
l Material of coating:Copper, Aluminum, Stainless Steel
l Application:solar cooker,solar water heater ,solar collector
We can provide solar vacuum tube with (Φ125mm,137mm)Diameter x (566mm-2160mm)Length.The size can be customized according to the different needs of customers.Our solar vacuum tube can be used for solar cooker,solar barbecue oven,solar heating ,solar refrigeration,solar energy without tank and solar collector.
| Technical parameter of Three target solar vacuum tube | ||||
| Outer tube diameter(mm) | 125 | 125 | 137 | 137 |
| Inner tube diameter(mm) | 111 | 111 | 121 | 121 |
| Tube Thickness(mm) | 3 | |||
| Tubes length(mm) | 566/600/700/850/1860/2160mm (from 566mm to 2160mm) | |||
| Structure | Three Target | |||
| Material | Borosilicate Glass 3.3 | |||
| Material of coating | Copper, Aluminum, Stainless Steel | |||
| Absorptance | ≥0.92 | |||
| Emittance | ≤0.06 | |||
| Vacuum | < 3×10-3 Pa | |||
| Transmittance of Outer Tube | 0.92 | |||
| Stagnation temperature (height) | >200℃ | |||
| Solar radiance exposure(MJ/m2) | ≤3.6 | |||
| Heat-loss coefficient(w/ (m2*℃) | < 0.5 | |||
| Pressure-endure ability | 1 MPa | |||
| Application | solar cooker,solar water heater ,solar collector | |||
Longpu's solar thermal vacuum tube is a high-tech product that captures and converts solar energy into useful heat energy, especially for Solar Cooker, Solar Water Heater and Solar Collector. It is made from premium Borosilicate Glass 3.3, with the model number of 137mm, origin from China, and packaged in Cartons. Its inner diameter is 121mm, and the thickness of the tube is 3.0mm. The high-efficiency solar vacuum tube is designed to absorb the maximum amount of solar energy and transfer it to heat energy quickly and effectively.
The Longpu Solar Evacuated Tube is an excellent choice for those who are looking for an energy-efficient and cost-saving solution for their Solar Cooker, Solar Water Heater and Solar Collector. It is also easy to install and maintain, and can provide long-lasting service with its superior quality and craftsmanship. With its advanced technology and excellent performance, the Longpu Solar Vacuum Tube can help to reduce energy costs and maximize the benefits of solar energy.
For air shipment,cartons are mostly used .
For sea shipment,only cartons are used if it's a full container. If it's a FCL ,we will use cartons+ wooden case according to the order.
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