TY - JOUR
T1 - Highly Selective Solar Thermal Sprayable Coating Based on Carbon Nanotubes
AU - Bera, Raj Kumar
AU - Binyamin, Yaniv
AU - Mhaisalkar, Subodh G.
AU - Magdassi, Shlomo
AU - Mandler, Daniel
N1 - Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/9/1
Y1 - 2017/9/1
N2 - A key component in solar thermal energy conversion system is the light collector that is coated with an absorbing material. Optimal performance is accomplished by high absorptance and low emittance. The best collectors are fabricated by vacuum deposition processes, which are limited to small size and flat objects. Here, the formation and performance of a new three-layer solar selective coating, which is formed by a simple wet-deposition process is reported. The solar absorbing layer is based on carbon nanotubes, which are considered the most absorbing material. This layer is coated by a second layer of ITO, which functions as an IR reflecting layer, followed by an AlOOH anti-reflective layer. The resulting CNT/ITO/AlOOH coating exhibited the best-reported spectral selectivity by wet deposition process, with high absorptance of 0.941 ± 0.004 and low emittance of 0.13 ± 0.02 at room temperature. Furthermore, the multilayer sprayable coating is stable at elevated temperature for a prolong time and therefore, shows promise for application in large scale and on-site solar thermal facilities.
AB - A key component in solar thermal energy conversion system is the light collector that is coated with an absorbing material. Optimal performance is accomplished by high absorptance and low emittance. The best collectors are fabricated by vacuum deposition processes, which are limited to small size and flat objects. Here, the formation and performance of a new three-layer solar selective coating, which is formed by a simple wet-deposition process is reported. The solar absorbing layer is based on carbon nanotubes, which are considered the most absorbing material. This layer is coated by a second layer of ITO, which functions as an IR reflecting layer, followed by an AlOOH anti-reflective layer. The resulting CNT/ITO/AlOOH coating exhibited the best-reported spectral selectivity by wet deposition process, with high absorptance of 0.941 ± 0.004 and low emittance of 0.13 ± 0.02 at room temperature. Furthermore, the multilayer sprayable coating is stable at elevated temperature for a prolong time and therefore, shows promise for application in large scale and on-site solar thermal facilities.
KW - carbon nanotubes
KW - selective coatings
KW - solar thermal
KW - wet-deposition
UR - http://www.scopus.com/inward/record.url?scp=85062878095&partnerID=8YFLogxK
U2 - 10.1002/solr.201700080
DO - 10.1002/solr.201700080
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AN - SCOPUS:85062878095
SN - 2367-198X
VL - 1
JO - Solar RRL
JF - Solar RRL
IS - 9
M1 - 1700080
ER -
