Experimental and numerical study on the potential of a new radiative cooling paint boosted by SiO2 microparticles for energy saving

Jiang, Kaiyu; Zhang, Kai; Shi, Zijie; Li, Haoran; Wu, Bingyang; Mahian, Omid; Zhu, Yao

doi:10.1016/j.energy.2023.128473

Cited by 20 publications

(4 citation statements)

References 46 publications

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“…Figure 6 also indicates that the fabricated FRC film can cool down the surface by up to 6.7 • C compared to the ambient temperature. Comparing the cooling performance of state-of-the-art radiative cooling materials, which achieved approximately 40-100 W/m 2 [30,[60][61][62], the FRC film is comparable. In addition, our FRC film can cool targets at a constant heat flux of 67.1 W/m 2 regardless of their curvature due to its excellent flexibility, safety, and durability.…”

Section: Cooling Powermentioning

confidence: 98%

Development of High-Performance Flexible Radiative Cooling Film Using PDMS/TiO2 Microparticles

Jung,

Yoon,

Kim

et al. 2023

Micromachines

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Radiative cooling, which cools an object below its surrounding temperature without any energy consumption, is one of the most promising techniques for zero-energy systems. In principle, the radiative cooling technique reflects incident solar energy and emits its thermal radiation energy into outer space. To achieve maximized cooling performance, it is crucial to attain high spectral reflectance in the solar spectrum (0.3–2.5 μm) and high spectral emittance in the atmospheric window (8–13 μm). Despite the development of various radiative cooling techniques such as photonic crystals and metamaterials, applying the cooling technology in practical applications remains challenging due to its low flexibility and complicated manufacturing processes. Here, we develop a high-performance radiative cooling film using PDMS/TiO2 microparticles. Specifically, the design parameters such as microparticle diameter, microparticle volume fraction, and film thickness are considered through optical analysis. Additionally, we propose a novel fabrication process using low viscosity silicone oil for practical fabrication. The fabricated film accomplishes 67.1 W/m2 of cooling power, and we also analyze the cooling performance difference depending on the fabrication process based on the measurement and optical calculation results.

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Section: Cooling Powermentioning

confidence: 98%

Development of High-Performance Flexible Radiative Cooling Film Using PDMS/TiO2 Microparticles

Jung,

Yoon,

Kim

et al. 2023

Micromachines

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“…In this work, we describe a simple one-pot method to obtain a water-based acrylic paint formulation where durable and emissive PVDF-HFP is used directly in powder form. To maintain a high porosity and a low weight, polydisperse glass bubbles − are also included, which contribute to a high scattering efficiency in the solar spectrum and further increase emittance at near-infrared wavelengths. Figure b depicts the functioning principle of the proposed paint formulation.…”

Section: Introductionmentioning

confidence: 99%

Radiative Cooling Potential of a Water-Based Paint Formulation under Realistic Application Conditions

Lio,

Werlé,

Arduini

et al. 2024

ACS Appl. Opt. Mater.

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“…Reducing carbon emissions can effectively alleviate global warming, especially carbon emissions in the building sector, which account for 30-40% of total global carbon emissions [1][2][3]. As a passive cooling technique, radiative cooling can be achieved by exchanging heat with outer space through an atmospheric window (8-13 µm) without extra energy input, which effectively reduces building carbon emissions [4,5].…”

Section: Introductionmentioning

confidence: 99%

Building Energy Efficiency Enhancement through Thermochromic Powder-Based Temperature-Adaptive Radiative Cooling Roofs

Song,

Zhang,

Xiao

et al. 2024

Buildings

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This paper proposes a temperature-adaptive radiative cooling (TARC) coating with simple preparation, cost effectiveness, and large-scale application based on a thermochromic powder. To determine the energy efficiency of the proposed TARC coating, the heat transfer on the surface of the TARC coating was analyzed. Then, a typical two-story residential building with a roof area of 258.43 m2 was modeled using EnergyPlus. Finally, the energy-saving potential and carbon emission reduction resulting from the application of the proposed TARC roof in buildings under different climates in China were discussed. The results showed that the average solar reflectivity under visible light wavelengths (0.38–0.78 μm) decreases from 0.71 to 0.37 when the TARC coating changes from cooling mode to heating mode. Furthermore, energy consumption can be reduced by approximately 17.8–43.0 MJ/m2 and 2.0–32.6 MJ/m2 for buildings with TARC roofs compared to those with asphalt shingle roofs and passive daytime radiative cooling (PDRC) roofs, respectively. This also leads to reductions in carbon emissions of 9.4–38.0 kgCO2/m2 and 1.0–28.9 kgCO2/m2 for the buildings located in the selected cities. To enhance building energy efficiency, TARC roofs and PDRC roofs are more suitable for use on buildings located in zones with high heating demands and high cooling demands, respectively.

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Experimental and numerical study on the potential of a new radiative cooling paint boosted by SiO2 microparticles for energy saving

Cited by 20 publications

References 46 publications

Development of High-Performance Flexible Radiative Cooling Film Using PDMS/TiO2 Microparticles

Development of High-Performance Flexible Radiative Cooling Film Using PDMS/TiO2 Microparticles

Radiative Cooling Potential of a Water-Based Paint Formulation under Realistic Application Conditions

Building Energy Efficiency Enhancement through Thermochromic Powder-Based Temperature-Adaptive Radiative Cooling Roofs

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