کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
761075 | 1462897 | 2013 | 7 صفحه PDF | دانلود رایگان |

The alternate and reverse periodic plating techniques were used to prepare the selective absorber samples. The glazed type-flat plate collector was used for photothermal testing. The calculated absorptivity of the selective absorbers (before degradation) falls in the range 92.0–97.0% and after degradation falls in the range 88.3–92.2%; while emissivity (before degradation) falls in the range 11.0–22.5% and after degradation falls in the range 11.6–23.4%. The maximum calculated net collective flux (before degradation) is in the range 590–699 W/m−2 and after degradation is in the range 566.4–664.1 W/m−2. The conversion efficiency (before degradation) is in the range 0.73–0.78 and after degradation falls in the range 0.70–0.74. Degradation testing carried out in air at different temperatures: 100 °C, 200 °C, 250 °C, and 300 °C. The degradation process leads to a decrease in the solar absorptivity and increase in the thermal emissivity of the films especially at 300 °C. Different parameters are discussed concerning the photothermal and the degradation testing.
► Photothermal testing was done before and after degradation by using flat plate collector.
► AC and reverse periodic plating techniques are used to prepare the selective absorber samples.
► Absorptivity, emissivity, collective flux and conversion efficiency before and after degradation were calculated.
► Degradation testing carried out in air at different temperatures: 100, 200, 250 and 300 °C.
► Degradation process leads to a decrease in the solar absorptance and increase in the thermal emittance of the films.
Journal: Energy Conversion and Management - Volume 65, January 2013, Pages 770–776