کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1672548 | 1008935 | 2009 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Fabrication and optimisation of highly efficient cermet-based spectrally selective coatings for high operating temperature Fabrication and optimisation of highly efficient cermet-based spectrally selective coatings for high operating temperature](/preview/png/1672548.png)
In terms of both high photo-thermal efficiency and high stability, multi-layer structures based on metal-dielectric composites (cermet) can be considered the most attractive selective solar absorbers for receiver tubes operating at medium-high temperatures in the field of solar thermodynamic plants. The double cermet layer approach represents a very simple fabrication method and can give high performances in terms of high solar absorptance and low hemispherical emittance. Optimised solar coatings based on cermet layers were fabricated in our laboratories by sputtering technique following the double layer approach. The joined employment of ellipsometric measurements and optical simulation is proposed as an effective method to optimise and fabricate coatings showing the best performances at a fixed operating temperature of the receiver tube. Interesting results concerning an optimised spectrally selective coating are shown. Solar absorptance higher than 0.94 and hemispherical emittance at 580 °C lower than 0.13 were obtained.
Journal: Thin Solid Films - Volume 517, Issue 21, 1 September 2009, Pages 6000–6006