Optical, structural and thermal performances of black nickel selective coatings for solar thermal collectors

Kaflé, Bhim Prasad; Basnet, Bijaya; Timalsina, Bikash; Deo, Akash; Malla, Tek Narsingh; Acharya, Nayan; Adhikari, Anish

doi:10.1016/j.solener.2022.01.042

Cited by 19 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As presented in Table 1, many of the materials reported [10,28,[30][31][32][33][34][35][36][37][38][39] as SSACs have not been evaluated in scale-up tests, avoiding establishing their real potential for a specific solar collection process. With this in mind, this work is focused on developing selective coatings based on spinel-type nickel-cobalt mixed oxides and evaluating their performance under operating conditions in a domestic-type flat collector for water heating.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Performance of Nickel–Cobalt Oxides as Selective Coatings for Flat-Plate Solar Thermal Collector Applications

Bacelis-Martínez,

Herrera-Zamora,

Ávila Santos

et al. 2023

Coatings

View full text Add to dashboard Cite

Solar thermal collectors represent a practical option to capture energy from the sun, providing low-cost domestic and industrial heating and decreasing the dependency on fossil fuels. Spinel-type metal oxides show interesting physicochemical properties and so can be used as active materials for converting solar energy to electrical, chemical, and heat energy. We report the synthesis and characterization of nickel–cobalt mixed metal oxides used as an active phase in selective paints for solar absorber coatings applied to a domestic flat collector. The nickel–cobalt mixed oxides crystallized in the cubic phase related to the spinel structure, exhibiting good thermal stability and reproducibility. These mixed oxides presented oxidation states (2+ and 3+) for both nickel and cobalt. The coatings fabricated from the selective paints based on nickel–cobalt mixed oxides showed a solar absorptance value of 94%, while for the commercial paint Solkote®, the value was 93%. A representative coating based on the NiCo2O4 composition was evaluated for the first time in a domestic-type flat solar collector for water heating under real operating conditions, achieving an outstanding performance that competes with that of commercial collectors. The potential application of nickel–cobalt mixed oxides in solar collectors opens up new opportunities for future innovations and developments in functional absorber coatings.

show abstract