Advances in photothermal regulation strategies: from efficient solar heating to daytime passive cooling

Zhu, Liangliang; Tian, Liang; Jiang, Siyi; Han, Lihua; Liang, Yunzheng; Li, Qing; Chen, Su

doi:10.1039/d3cs00500c

Cited by 55 publications

(11 citation statements)

References 559 publications

(735 reference statements)

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“…It is well-known that white color represents the ability to strongly reflect visible light. 79 Featuring a white exterior design, materials will minimize the passage of visible light. A three-dimensional porous cellulose acetate (3DPCA) composite film was designed as white materials for passive cooling.…”

Section: White Surface With Passive Cooling Powermentioning

confidence: 99%

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Hydrogel-Based Stimuli-Responsive Radiative and/or Evaporative Cooling Materials for Carbon Neutrality

Shang,

Zhang,

Zhang

et al. 2024

ACS Energy Lett.

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Radiative cooling cools by radiating heat toward outer space. Evaporative cooling cools by dispatching the latent heat of water via evaporation. These two types of cooling operate without additional pollutant generation. Hydrogel is the one substance that can combine the above two cooling strategies and thus holds high promise to facilitate the construction of a carbon neutral society. This review article first documents the basic principles related to passive cooling, evaporative cooling, heat transfer, and light modulation. Then, the general considerations for hydrogel-based cooling materials are summarized. Third, stimuli-responsive hydrogel-based cooling systems are systematically discussed from aspects of operation mechanisms as well as material selections. Lastly, typical applications of hydrogel-based radiative and/or evaporative cooling materials in buildings, electronic devices, and wearable devices are discussed. Challenges for further development of the hydrogel-based cooling materials are discussed as ending remarks.

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Section: White Surface With Passive Cooling Powermentioning

confidence: 99%

“…It is well-known that white color represents the ability to strongly reflect visible light . Featuring a white exterior design, materials will minimize the passage of visible light.…”

Section: General Considerations and Materials Choices For Passive Coo...mentioning

confidence: 99%

Hydrogel-Based Stimuli-Responsive Radiative and/or Evaporative Cooling Materials for Carbon Neutrality

Shang,

Zhang,

Zhang

et al. 2024

ACS Energy Lett.

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“…RC materials exchange heat with outer space efficiently due to the enormous temperature difference between outer space and the Earth’s surface (3 K vs 300 K). − Moreover, by regulating the surface spectra, RC materials can avoid heating by atmospheric irradiance and reflect most of the sunlight. − EC uses latent heat from the gas–liquid phase transformation. Hydrogen bonds are formed between adjacent hydrogen and oxygen atoms in liquid water, endowing water with the highest enthalpy of evaporation among regular-temperature liquids. , …”

Section: Introductionmentioning

confidence: 99%

Self-sustained and Insulated Radiative/Evaporative Cooler for Daytime Subambient Passive Cooling

Yu,

Huang,

Zhao

et al. 2024

ACS Appl. Mater. Interfaces

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Passive cooling technologies are one of the promising solutions to the global energy crisis due to no consumption of fossil fuels during operation. However, the existing radiative and evaporative coolers still have problems achieving daytime subambient cooling while maintaining evaporation over the long term. Here, we propose a self-sustained and insulated radiative/evaporative cooler (SIREC), which consists of a porous polyethylene film (P-PE) at the top, an air layer in the middle, and poly(vinyl alcohol) hydrogel with lithium bromide (PLH) at the bottom. In particular, the P-PE shows high solar reflectance (R̅ solar = 0.91) and long-wave infrared transmittance (τ ̅ LWIR = 0.92), which reflects sunlight while enhancing the direct radiative heat transfer between outer space and PLH (ε ̅ LWIR = 0.96) for sky radiative cooling. In addition, the desirable vapor permeability (579 s m −1 ) of the P-PE also results in good compatibility with PLH for evaporative cooling (EC). Moreover, the PLH's ability to harvest atmospheric water at night provides self-sustainment for daytime EC. The air layer between P-PE and PLH further enhances the subambient cooling performance of the SIREC. These findings indicate promising prospects for the integration of passive cooling technologies.

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“…9 A recent advancement in this realm is the development of solar-powered interfacial evaporation, showcasing attributes such as heat localization, grid independence, low maintenance and user-friendliness. 10,11 This technology is particularly well-suited for remote and off-grid areas, including ports, islands, offshore platforms and similar locations. 12–14 To further mitigate heat losses, a strategy known as “indirect contact” was devised, involving the elevation of photothermal heating interfaces above water bodies, thus facilitating the creation of three-dimensional (3D) interfacial solar steam generators (SGs).…”

Section: Introductionmentioning

confidence: 99%

Foaming photothermal inks for direct-ink writing: hierarchical design and enhanced solar-powered interfacial evaporation

Gao,

Shao,

et al. 2024

J. Mater. Chem. A

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Advances in photothermal regulation strategies: from efficient solar heating to daytime passive cooling

Abstract: This review provides a comprehensive overview of photothermal regulation strategies from fundamentals, criteria, and advanced materials to emerging applications.

Cited by 55 publications

References 559 publications

Hydrogel-Based Stimuli-Responsive Radiative and/or Evaporative Cooling Materials for Carbon Neutrality

Hydrogel-Based Stimuli-Responsive Radiative and/or Evaporative Cooling Materials for Carbon Neutrality

Self-sustained and Insulated Radiative/Evaporative Cooler for Daytime Subambient Passive Cooling

Foaming photothermal inks for direct-ink writing: hierarchical design and enhanced solar-powered interfacial evaporation

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