论文标题
具有高温不敏感的光谱选择性太阳能吸收剂
Spectrally Selective Solar Absorbers with High-temperature Insensitivity
论文作者
论文摘要
将光谱选择性技术纳入太阳热工程，尤其是在高运行温度下，这是很重要的。这项工作展示了由多层钨，二氧化硅和氧化铝薄膜制成的频谱选择性太阳能吸收器，它们是角度不敏感且无偏振的薄膜。在太阳辐照度波长下的总体吸收率为88.1％，红外热波长的低发射率低7.0％，高太阳能到高效率为79.9％。此外，它显示退火样品在至少600 c的太阳辐射方案中保持极高的吸收，而在800 C下进行热退火后的太阳能吸收剂在CSP系统中仍然可以很好地工作，其均匀浓度均超过100。
It is of significance to incorporate spectral selectivity technology into solar thermal engineering, especially at high operational temperatures. This work demonstrates spectrally selective solar absorbers made of multilayer tungsten, silica, and alumina thin films that are angular insensitive and polarization-independent. An overall absorptance of 88.1% at solar irradiance wavelength, a low emittance of 7.0% at infrared thermal wavelength, and a high solar to heat efficiency of 79.9% are identified. Additionally, it shows the annealed samples maintain an extremely high absorption in solar radiation regime over at least 600 C and the solar absorbers after thermal annealing at 800 C still work well in a CSP system with an even high concentration factor of over 100.
