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Area of Science:

  • Materials Science
  • Nanotechnology
  • Building Physics

Background:

  • Indoor heating significantly contributes to building energy consumption in cold climates.
  • Transparent solar absorber coatings are crucial for reducing winter heating energy demands and costs.
  • Nanophotonic structures are actively researched for transparent solar absorbers, but planar multilayer structures are underexplored.

Purpose of the Study:

  • To investigate the performance of planar multilayer thin films for transparent solar absorber window coatings.
  • To explore the use of low-cost materials in designing these coatings.
  • To evaluate their potential for winter thermal management in buildings.

Main Methods:

  • Investigated planar multilayer thin film structures.
  • Utilized low-cost materials for coating design.
  • Performed simulations to predict performance metrics.

Main Results:

  • Proposed two novel planar multilayer designs for transparent solar absorber window coatings.
  • Simulation results indicate potential for surface temperature increases of 27 K and 25 K.
  • Achieved mean visible transmittance exceeding 50% with these designs.

Conclusions:

  • Planar multilayer structures show significant promise for developing effective transparent solar absorber window coatings.
  • These coatings can contribute to reduced energy consumption and fuel costs for winter heating.
  • The proposed designs offer a viable solution for winter thermal management in buildings.