Optimal design of low-emissivity coatings
We report a comprehensive numerical study demonstrating surprisingly good photoenergetic performance of low-emissivity (low-E) coatings comprised of just 5 layers. Simulations are performed within the transfer-matrix framework in conjunction with multiobjective optimization using a genetic algorithm...
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| Published in: | Solar energy materials and solar cells Vol. 280; p. 113267 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
15.01.2025
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| ISSN: | 0927-0248 |
| Online Access: | Get full text |
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| Summary: | We report a comprehensive numerical study demonstrating surprisingly good photoenergetic performance of low-emissivity (low-E) coatings comprised of just 5 layers. Simulations are performed within the transfer-matrix framework in conjunction with multiobjective optimization using a genetic algorithm. We show that upon utilization of conventional dielectric materials with only one silver layer, all that arranged in a multilayered stack with optimal thickness, large light-to-solar gain (LSG) ratio and visible transmittance (VT) up to 2.4 and 0.72, respectively, with neutral color (a∗=−3±1 and b∗=−5±1 in CIELAB color space) can be achieved. Such an outstanding behavior of single-metal glazing is explained by the emergence of open Fabry-Pérot cavity (so-called pseudo-cavity), the unusual concept for the low-E industry centered around conventional metal-dielectric-metal Fabry-Pérot cavities. Our work highlights the importance of large-scale computational optimization for the design of efficient low-E coatings and provides a useful guide for future developments in this field.
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•Comprehensive theoretical model for estimating photoenergetic performance of low-emissivity coatings is summarized.•Large-scale optimization shows that single Ag layer with properly aligned dielectric layers emerge superior performance.•Optimally designed low-emissivity coatings are characterized with large light-to-solar gain ratio of 2.4 and neutral color.•Our results have critical importance for optimal design of low-emissivity coatings in conjunctions with solar energy control. |
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| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2024.113267 |