| 摘要 |
Vacuum solar thermal panel comprising a vacuum envelope (30) defining a sealed volume, able to withstand the atmospheric pressure when evacuated, at least one heat absorber (12) being disposed inside the vacuum envelope (30), a pipe (13) entering and exiting the envelope (30) and being in contact with the heat absorber (12), said vacuum envelope (30) comprising at least a first plate (1; 101) made of glass, and a frame (3) for supporting at least said first glass plate (1; 101), wherein said panel comprises on the inner side of the at least one glass plate (1, 2) an infra red low emitting coating (1C, 2C) and that said coating is chosen in such a way: that the reflectivity for wavelengths comprised between 4 and 6 micron is more than 0,9 and that the transmission for wavelengths comprised between 0,25 and 1 micron is more than 0,7. |
