A tandem radiative/evaporative cooler for weather-insensitive and high-performance daytime passive cooling

Li, Jinlei; Wang, Xueyang; Dong, Liu; Xu, Ning; Zhu, Bin; Li, Wei; Zhu, Jing; Jiang, Yi; Min, Xinzhe; Huang, Zhengzong; Zhu, Shining; Fan, Shanhui

doi:10.1126/sciadv.abq0411

Cited by 100 publications

(67 citation statements)

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“…In this section, the established optical model and thermodynamics model were validated based on the recent work by Li et al [ 24 ]. They developed a tandem radiative/evaporative (TRE) cooling system to demonstrate the superimposed cooling performance.…”

Section: Resultsmentioning

confidence: 99%

“… Validation of the optical model ( A ) and the thermodynamics model ( B ). The experimental data were obtained from Li et al [ 24 ]. …”

Section: Figurementioning

confidence: 99%

“…During the day, the evaporation and infrared radiation synergies, leading to a temperature reduction of 10.8 °C. By replacing the hundreds-microns-thick radiative cooling layer with a few-millimeter-thick cellulose acetate fibrous network, a tandem radiative/evaporative (TRE) cooling system was proposed by Li et al [ 24 ]. They experimentally demonstrated a cooling power above ~300 W m −2 in different climate regions.…”

Section: Introductionmentioning

confidence: 99%

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Boosting Evaporative Cooling Performance with Microporous Aerogel

Tang

Guo

et al. 2023

Micromachines

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Hydrogel-based evaporative cooling with a low carbon footprint is regarded as a promising technology for thermal regulation. Yet, the efficiency of hydrogel regeneration at night generally mismatches with vapor evaporation during the day, resulting in a limited cooling time span, especially in arid regions. In this work, we propose an efficient approach to improve hydrogel cooling performance, especially the cooling time span, with a bilayer structure, which comprises a bottom hydrogel layer and an upper aerogel layer. The microporous aerogel layer can reduce the saturation vapor density at the hydrogel surface by employing daytime radiative cooling, together with increased convective heat transfer resistance by thermal insulation, thus boosting the duration of evaporative cooling. Specifically, the microstructure of porous aerogel for efficient radiative cooling and vapor transfer is synergistically optimized with a cooling performance model. Results reveal that the proposed structure with a 2-mm-thick SiO2 aerogel can reduce the temperature by 1.4 °C, meanwhile extending the evaporative cooling time span by 11 times compared to a single hydrogel layer.

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Section: Resultsmentioning

confidence: 99%

“… Validation of the optical model ( A ) and the thermodynamics model ( B ). The experimental data were obtained from Li et al [ 24 ]. …”

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Boosting Evaporative Cooling Performance with Microporous Aerogel

Tang

Guo

et al. 2023

Micromachines

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“…However, this system is limited by intense solar radiation. Furthermore, a tandem passive cooling of evaporation and radiation exhibits excellent cooling performance under various conditions of weather/climate [ 74 , 75 ]. Therefore, by combining radiative cooling techniques with passive cooling techniques such as salinity difference systems and evaporative cooling, the implementation of energy-saving strategies in space cooling and human thermal management systems is expected to extend future application scenarios.…”

Section: Discussionmentioning

confidence: 99%

Radiative cooling for passive thermal management towards sustainable carbon neutrality

Liang

Guo

et al. 2022

National Science Review

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Photonic structures at the wavelength scale offer innovative energy solutions for a wide range of applications, from high-efficiency photovoltaics to passive cooling, thus reshaping the global energy landscape. Radiative cooling based on structural and material design presents new opportunities for sustainable carbon neutrality as a zero-energy, ecologically friendly cooling strategy. In this review, in addition to introducing the fundamentals of the basic theory of radiative cooling technology, typical radiative cooling materials alongside their cooling effects over recent years are summarized, and the current research status of radiative cooling materials is outlined and discussed. Furthermore, technical challenges and potential advancements for radiative cooling are forecast with an outline of future application scenarios and development trends. In the future, radiative cooling is expected to make a significant contribution to global energy saving and emission reduction.

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“…4 In recent years, as a promising technology, personal thermal management materials have provided human thermal comfort, while reducing the energy consumption of buildings. [5][6][7][8][9][10][11] Unlike the energy consumption of humans, some animals living in extreme environments have evolved unique thermal management strategies, such as Saharan silver ants and polar bears. Saharan silver ants inhabit environments with nearly the most sunshine and hottest temperatures on the earth (Fig.…”

mentioning

confidence: 99%