Cooling performance of porous polymer radiative coating under different environmental conditions throughout all-year

Gao, Yongfeng; Song, Xihao; Farooq, Abdul Samad; Zhang, Peng

doi:10.1016/j.solener.2021.09.062

Cited by 31 publications

(12 citation statements)

References 38 publications

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“…Passive radiative cooling is a renewed cooling technology that dissipates heat into 3 K deep space by radiation, mainly via the 8 to 13 μm atmospheric window . It has gained growing attention because it can realize cooling without external energy consummation and does not produce any pollutants. , …”

Section: Introductionmentioning

confidence: 99%

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Calcium Phosphate Paints for Full-Daytime Subambient Radiative Cooling

Chen

2022

ACS Appl. Energy Mater.

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Passive radiative cooling is of great significance for energy-saving and global carbon neutrality because of its zero energy consumption, no pollution, and low cost. To achieve radiative cooling, minimum absorption in solar radiation and maximum emission in the sky window are required. In this work, we have developed an all-season full-daytime subambient radiative cooler based on Ca3(PO4)2-acrylic paint, which shows an exceptional solar reflectance of 97.6% and a high sky window emissivity of 0.96. The 5.6 eV bandwidth and 9.3 μm phonon resonance enable Ca3(PO4)2 to efficiently reflect solar flux and dissipate infrared emission through the atmospheric window. The field tests during summer indicate that the surface temperature is more than 18 °C below ambient temperatures on average, and a net cooling power of 95 W/m2 was obtained during daytime. At noon, with a summit solar radiation intensity of 900 W/m2, it remains at ∼38 °C below ambient temperature. Furthermore, during winter, the temperature of the Ca3(PO4)2 paint drops to as low as −9 °C, which is 16 °C lower than the ambient temperature, and an average cooling power of 60 W/m2 was obtained. The paint shows a standard figure of merit of 0.72, which is among the highest of radiative cooling solutions.

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Section: Introductionmentioning

confidence: 99%

“…1 It has gained growing attention because it can realize cooling without external energy consummation and does not produce any pollutants. 2,3 It is relatively simple to achieve passive radiative cooling at night as there is no solar radiation. However, passive radiative cooling materials have to face solar radiation during the daytime.…”

Section: Introductionmentioning

confidence: 99%

Calcium Phosphate Paints for Full-Daytime Subambient Radiative Cooling

Chen

2022

ACS Appl. Energy Mater.

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“… 2 , 3 Therefore, cooling technology that achieves the purpose of cooling without consuming any energy is an urgent need in today’s society. 4 , 5 …”

Section: Introductionmentioning

confidence: 99%

“…Refrigeration is becoming increasingly important to human society due to global warming and rising living standards . However, today’s cooling technology is mostly dependent on energy consumption, which is only intensifying due to the increasing heat island effect in cities. , Therefore, cooling technology that achieves the purpose of cooling without consuming any energy is an urgent need in today’s society. , …”

Section: Introductionmentioning

confidence: 99%

“…2,3 Therefore, cooling technology that achieves the purpose of cooling without consuming any energy is an urgent need in today's society. 4,5 Radiative cooling as a passive cooling strategy with zero power consumption has shown great promise in reducing cooling costs in a variety of cooling applications. 6 Radiative cooling has become an attractive concept as it aims to solve the problems associated with energy consumption and to reduce the urban heat island effect.…”

Section: ■ Introductionmentioning

confidence: 99%

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Recyclable, UV-Blocking, and Radiative Cooling Multifunctional Composite Membranes

et al. 2022

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It is well known that UV radiation can cause human health problems and that energy consumption can lead to human survival problems. Here, we prepared a composite membrane that can block UV radiation as well as reduce energy consumption. Carbon dots (CDs) and acrylates were prepared from xylose and epoxidized soybean oil as biomass feedstocks, respectively, and the composite membrane was prepared by a self-assembly strategy. The first layer of the membrane is composed of CDs and epoxy resin. Its main function is not only to weaken UV rays and the aggregation-induced quenching effect of CDs but also to reduce the absorption of UV rays by the second layer of the membrane. The second layer consists of barium sulfate (BaSO 4 ) and acrylate. Compared to TiO 2 (3.2 eV), BaSO 4 (∼6 eV) has a higher electronic band gap, which reduces the absorption of UV light by the membrane. The composite membrane exhibits excellent UV-blocking and radiative cooling performance, shielding 99% of UV rays. In addition, the membrane can reduce 4.4 °C in radiative cooling tests, achieving a good cooling effect. Finally, the recyclability of the BaSO 4 /acrylate membrane is discussed, and 95% recovery rate provides sustainable utilization of the membrane. The composite membrane is expected to be popularized and used in low latitudes and areas with high temperature and high UV radiation near the equator.

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Introducing masking layer for daytime radiative cooling coating to realize high optical performance, thin thickness, and excellent durability in long-term outdoor application

Dong,

Zou,

et al. 2023

Applied Energy

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Cooling performance of porous polymer radiative coating under different environmental conditions throughout all-year

Cited by 31 publications

References 38 publications

Calcium Phosphate Paints for Full-Daytime Subambient Radiative Cooling

Calcium Phosphate Paints for Full-Daytime Subambient Radiative Cooling

Recyclable, UV-Blocking, and Radiative Cooling Multifunctional Composite Membranes

Introducing masking layer for daytime radiative cooling coating to realize high optical performance, thin thickness, and excellent durability in long-term outdoor application

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