scholarly journals Measurement of the Solar Absorptance and the Thermal Emittance of Lunar Simulants

2010 ◽  
Author(s):  
James Gaier ◽  
Kenneth Street ◽  
Robert Gustafson
Keyword(s):  
Solar Absorptance ◽  
Thermal Emittance ◽  
Lunar Simulants

scholarly journals Thermal emittance and solar absorptance measurement comparison on receiver tube absorber samples

2020 ◽  
Author(s):  
Fabienne Sallaberry ◽  
Javier Barriga ◽  
Alberto García de Jalón ◽  
Francisco Goñi ◽  
Raquel Erice ◽  
...  
Keyword(s):  
Solar Absorptance ◽  
Thermal Emittance

Temperature Dependence of the Solar Absorptance and Thermal Emittance of Copper, Gold, Nickel, and Silver

1964 ◽  
Vol 3 (12) ◽  
pp. 1411 ◽  
Author(s):  
William J. Thaler ◽  
Edward J. Finn ◽  
Paul A. Treado ◽  
Jamil Nakhleh
Keyword(s):  
Temperature Dependence ◽  
Solar Absorptance ◽  
Thermal Emittance ◽  
Copper Gold

Solar absorptance and thermal emittance of cermets with large particles

2000 ◽  
Vol 33 (19) ◽  
pp. 2489-2496 ◽  
Author(s):  
C A Arancibia-Bulnes ◽  
C A Estrada ◽  
J C Ruiz-Suárez
Keyword(s):  
Solar Absorptance ◽  
Thermal Emittance ◽  
Large Particles

High Thermal Stability of Mo/Si3N4/Mo/Si3N4/SiO2 Multilayer Solar Selective Coatings

2015 ◽  
Vol 1102 ◽  
pp. 67-71 ◽  
Author(s):  
Rui Hua Yang ◽  
Jin Yang Liu ◽  
Li Mei Lin ◽  
Fa Chun Lai ◽  
Yan Qu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Multilayer Structure ◽  
High Thermal Stability ◽  
Solar Absorptance ◽  
Selective Coating ◽  
Thermal Emittance ◽  
Quartz Substrates ◽  
Thermal Stability Of

In terms of good optical properties and high thermal stability, Mo/Si3N4/Mo/Si3N4/SiO2 coatings based on metal/dielectric multilayer structure were adapted to the solar selective coating at high operating temperatures. The coatings exhibited high solar absorptance in the range of 0.924 ~ 0.936 and low thermal emittance of 0.114 ~ 0.118. The coatings deposited on quartz substrates were thermally stable up to 625 °C in air for 2 h, while they were degraded at 650 °C from the characterization of the absorptance and emittance. The degradation of the coatings was mainly due to the oxidation of molybdenum in air, which was confirmed by Raman spectroscopy. Compared with the thermal stability in air, the coatings were much more stable in vacuum under high temperature. The remarkable thermal stability of the Mo/Si3N4/Mo/Si3N4/SiO2 coatings in air and in vacuum makes them suitable to be applied at high temperature applications.

Characterization of Pyromark 2500 Paint for High-Temperature Solar Receivers

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Clifford K. Ho ◽  
A. Roderick Mahoney ◽  
Andrea Ambrosini ◽  
Marlene Bencomo ◽  
Aaron Hall ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Elevated Temperatures ◽  
Normal Incidence ◽  
Radiative Properties ◽  
Solar Absorptance ◽  
Thermal Emittance ◽  
Percentage Points ◽  
Original Coating

Pyromark 2500 is a silicone-based high-temperature paint that has been used on central receivers to increase solar absorptance. The radiative properties, aging, and selective absorber efficiency of Pyromark 2500 are presented in this paper for use as a baseline for comparison to high-temperature solar selective absorber coatings currently being developed. The solar absorptance ranged from ∼0.97 at near-normal incidence angles to ∼0.8 at glancing (80°) incidence angles, and the thermal emittance ranged from ∼0.8 at 100 °C to ∼0.9 at 1000 °C. After thermal aging at temperatures of ∼750 °C or higher, the solar absorptance decreased by several percentage points within a few days. It was postulated that the substrate may have contributed to a change in the crystal structure of the original coating at elevated temperatures.

scholarly journals Reduced Graphene Oxide–Based Spectrally Selective Absorber with an Extremely Low Thermal Emittance and High Solar Absorptance

2020 ◽  
Vol 7 (8) ◽  
pp. 1903125 ◽  
Author(s):  
Qihua Liao ◽  
Panpan Zhang ◽  
Houze Yao ◽  
Huhu Cheng ◽  
Chun Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Solar Absorptance ◽  
Thermal Emittance ◽  
Spectrally Selective ◽  
Reduced Graphene

Analysis of Tungsten-Alumina Nanocomposite Thin Films on SS304 Substrate

2021 ◽  
Vol 903 ◽  
pp. 125-132
Author(s):  
T.R. Mohan Kumar ◽  
P.V. Srihari ◽  
Sahas ◽  
M.S. Krupashankara
Keyword(s):  
Thin Films ◽  
Process Parameters ◽  
Gas Flow ◽  
Composite Coatings ◽  
Research Work ◽  
Substrate Material ◽  
Key Factors ◽  
Solar Absorptance ◽  
Thermal Emittance ◽  
Deposition Parameters

Higher solar absorptance and lower thermal emittance are the key factors for solar collectors. The use of thin films that are having mechanically resistant coatings are common practice in industries. The primary motivation of carrying this research work is to lower thermal emittance and maximize solar absorptance on SS304 substrate material. W-Al2O3 composite coatings are developed using magnetron sputtering process by considering the process parameters. The experimental plan is achieved based on Taguchi L9 orthogonal under various levels for deposition parameters. The tungsten and alumina thin films deposited using a co-sputtering were characterized using 410 - solar instrument for measuring solar absorptance and ET 100 Emissometer for measuring thermal emittance. The optimization for process parameters on thermal emittance and absorptance were carried out. It was found that for deposition parameters of DC power 750W, RF power 1050W and Argon gas flow rate of 250 sccm, absorptance of 0.758 with thermal emittance of 0.061 is observed with deposition was carried out on SS304 substrates.

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