| 摘要 |
A system for limiting the internal temperature of a solar thermal collector uses a spectrally selective absorber coating with a higher emissivity [greater than 0.25 in the infra-red (IR) spectrum above 2mum (micrometers)] and/or a longer (higher) critical wavelength of at least 3mum, as compared to conventional spectrally selective absorber coatings with typical emissivity in the range of 0.05 to 0.1 or a typical critical wavelength at around 2mum. |
