Radiative cooling: Fundamental physics, atmospheric influences, materials and structural engineering, applications and beyond

Lin, Keng‐Te; Han, Jihong; Li, Ké; Guo, Chunsheng; Lin, Han; Jia, Baohua

doi:10.1016/j.nanoen.2020.105517

Cited by 94 publications

(63 citation statements)

References 122 publications

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“…Passive radiative cooling efficiency is essentially affected by the weather conditions including solar intensity, wind speed, and atmospheric transmittance which are determined by relative humidity (RH), degree of cloudiness, air quality, and so on. 38 As shown in Fig. 3c-f, under different weather conditions (listed in Supplementary Table S2) like sunny, sunny with haze (RH of ~46% and PM2.5 of 105, O3 of 101), clear to cloudy (RH of ~47%), and overcast (RH of ~58%), the coatings can achieve a ∆𝑇𝑇 𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐 of ~8.4, ~4.9, ~4.0, and ~4.2 °C at noontime, respectively.…”

Section: Passive All-day Radiative Cooling Performance Of Poly(tmpta-vtes) Coatingmentioning

confidence: 95%

UV-cured coatings for highly efficient passive all-day radiative cooling

Luo¹,

Yang

Guo³

et al. 2022

Preprint

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Passive radiative cooling provides a promising way to reduce energy consumption for cooling. However, it always requires stringent materials designs or manipulations, which are neither cost-effective nor widely adaptable. Here, we report a fast, inexpensive, and scalable UV-curing method to fabricate porous polymer coatings via photopolymerization-induced phase separation. This coating with hierarchical pore structure, has a superior long-wave infrared emittance of 0.98 and strong solar reflectance of 0.96, resulting in sub-ambient temperature drops of ~9.8°C during the night and ~5.7°C under solar intensity of ~960 W m−2 in the metropolitan area in summer. Moreover, the UV-cured coating is highly crosslinked and superhydrophobic without any treatment, showing excellent durability after long-term UV irradiation, thermal aging, or immersion in corrosive chemicals. The paint-like simplicity and remarkable weather resistance are vital for promoting practical applications of cooling coatings.

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Section: Passive All-day Radiative Cooling Performance Of Poly(tmpta-vtes) Coatingmentioning

confidence: 95%

UV-cured coatings for highly efficient passive all-day radiative cooling

Luo¹,

Yang

Guo³

et al. 2022

Preprint

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“…Compression-based cooling systems not only consume a large amount of electrical energy but the resultant heating effect and greenhouse gas emissions lead to various environmental issues such as the urban heat island effect and thermal pollution. [1][2][3][4] Hence, developing alternative cooling technologies with low energy consumption and high efficiency that can alleviate energy demand and environmental problems is becoming urgent. [5][6][7][8] Passive daytime radiative cooling (PDRC) which refers to a ubiquitous process of losing heat through thermal radiation 2 has attracted much attention recently due to it being electricityfree and environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

Sustainable and self-cleaning bilayer coatings for high-efficiency daytime radiative cooling

2022

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“…The control of the surface temperature is often ignored in the research of controlling the surface emittance. To control the surface temperature, thermal insulators, [20] radiative cooling, and [21][22][23] phase-change materials [24,25] have been applied in the field of IR camouflage. Thermal insulators can effectively control the surface temperature of an object by blocking heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Design of a Hybrid Structure for Controlling Infrared Characteristic Based on Photonic Crystals with Active Thermal Management

Song

Xie

2022

Physica Status Solidi (a)

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Control technology for infrared characteristic has been a hot topic for decades. Herein, a hybrid structure for controlling infrared characteristic combining a wavelength‐selective emitter, microchannel heat exchanger, and thermal barrier coatings (TBC) is proposed to tune the surface infrared signature. First, the optimization algorithm is used to optimize the design to realize the spectral selective emission of the surface. The optimized 1D photonic crystal (PC) has high emittance in the 5–8 μm nonatmospheric window (ε 5−8 = 0.723) for radiative cooling and low emittance in the 3–5 and 8–14 μm atmospheric window (ε 3−5 = 0.480 and ε 8−14 = 0.067) for infrared camouflage. Further control of surface temperature is achieved by combining the nanofluid‐cooled microchannel heat exchanger and TBCs. When the Reynolds number is 1000 and the wall heating temperature is 1473.15 K, the IR signal intensity can be reduced by 35.3 dB. This scheme may provide a new idea for infrared characteristic signal control.

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Radiative cooling: Fundamental physics, atmospheric influences, materials and structural engineering, applications and beyond

Cited by 94 publications

References 122 publications

UV-cured coatings for highly efficient passive all-day radiative cooling

UV-cured coatings for highly efficient passive all-day radiative cooling

Sustainable and self-cleaning bilayer coatings for high-efficiency daytime radiative cooling

Design of a Hybrid Structure for Controlling Infrared Characteristic Based on Photonic Crystals with Active Thermal Management

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