SFU
The working principle of U-type solar collector:
The fluid passes through the U-shaped copper pipe which inserted inside the vacuum tube (evacuated tube) and when warmed up, it returns up to the header pipe. An aluminum fin conducts heat from the entire inner surface of the evacuated tube and transfers it to the solar fluid inside the copper pipe. The fin touches precisely to the inner glass tube and embraces tightly the U copper pipe. Specification of U- type solar collector is shown below:
Specifications:
| Manifold (interior): | Red copper |
| Manifold (exterior): | Aluminum alloy |
| Pipe: | U type |
| Dimensions of glass tube: | ø58mm x 1800mm / ø47mm x 1500mm |
| Heat preservation: | 72 hrs |
| Hail resistance: | 25mm |
| Max pressure: | 6 bar |
| Coating of vacuum tube: | SS-C/CU & AL/N (three target) |
| Heat pipe: | anti-freezing > -35 degree |
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