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Article
Green & Sustainable Science & Technology
Bin Zhao et al.
Summary: The investigation of harvesting energy from the sun and the universe has gained attention due to its clean utilization. A broadband selective absorber/emitter (BS-A/E) has been designed and fabricated for the hybrid utilization of solar thermal and radiative cooling. Outdoor experiments have demonstrated its considerable solar thermal and radiative cooling performance, making it suitable for applications such as all-day thermoelectric power generation and thermal storage-based space heating/cooling.
Article
Chemistry, Multidisciplinary
Meiling Liu et al.
Summary: We propose a spectrally self-adaptive broadband absorber/emitter based on vanadium dioxide (VO2) to achieve continuous energy harvesting via collecting solar thermal energy during the day and obtaining cool energy in wide-band radiative cooling mode at night. The device shows a broadband infrared emissivity modulation and high efficiency in energy collection. The proposed VO2 smart coatings also have potential applications in thermal management of spacecraft, infrared camouflage, and adaptive optical devices.
Article
Thermodynamics
Zhao-Hui Ruan et al.
Summary: Due to the lack of optical property data of alkali chlorides, it is difficult to consider radiative heat transfer, hindering its further application. In this paper, a theoretical approach is developed to estimate the temperature-dependent optical property of molten salts. The temperature-dependent optical properties of KCl and NaCl are estimated as an example, showing extremely similar patterns due to the similarity of K and Na.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Review
Chemistry, Physical
Jihong Pu et al.
Summary: In the past decades, spectrally selective windows have been widely studied and developed for building energy-saving purposes. This review focuses on ion-based and nanoparticle-based NIR absorbing glazings, discussing their spectral selectivity mechanisms, application status, and comparative evaluation of their performance. The challenges and future directions for bridging the gap between lab research and large-scale practical applications are also discussed.
Article
Nanoscience & Nanotechnology
Xinping Zhang et al.
Summary: Passive daytime radiative cooling (PDRC) is a zero-energy cooling technology that aims to reduce global fossil energy consumption and has gained significant interest. However, balancing the pursuit of ultrahigh dual-band optical properties and compatibility with multiple functional requirements remains a major challenge for PDRC.
Article
Energy & Fuels
Cun-Hai Wang et al.
Summary: In this paper, a passive thermoelectric system that produces continuous electric power during a full 24-hour day is proposed. The system utilizes radiative cooling and solar heating to maintain and amplify the thermoelectric output. The effects of various factors on system performance are studied, and the system's seasonal and locational performance in China is evaluated.
Article
Energy & Fuels
Yan Dong et al.
Summary: The idea of introducing a masking layer to prepare a water-based double-layer PDRC coating with high optical performance and thin thickness is proposed in this study. The PDRC coating achieved high solar reflectance and atmospheric transparent spectrum window emittance, with only 40% of the thickness and 60% of the cost compared to existing water-based PDRC coating. The coating demonstrated efficient cooling performance in large-scale outdoor applications and energy savings in container rooftops, providing compelling evidence for its ability to mitigate carbon emissions and address global climate change.
Article
Energy & Fuels
Mingke Hu et al.
Summary: By utilizing outer space as the heat sink, a terrestrial body can cool itself to sub-ambient temperatures through radiative sky cooling technology. A hybrid solar photothermic and radiative cooling collector has been proposed to flexibly switch between modes to meet specific energy demands in various scenarios.
Article
Energy & Fuels
Yuanting Zhang et al.
Summary: This study presents the design and evaluation of a solar receiver using liquid tin as the heat transfer fluid. The receiver demonstrates safe and efficient solar energy capture at high temperatures, but challenges arise at higher temperatures and incident power levels.
Article
Chemistry, Multidisciplinary
Dongyang Miao et al.
Summary: Personal cooling textiles provide a promising energy-free solution to tackle heat-related public health threats and improve industrial worker productivity. This study demonstrates a hierarchically designed polyurethane/silicon nitride fibrous membrane with Janus wettability, which shows excellent all-day cooling performance and can be applied in smart textiles, energy-saving, and personal cooling applications.
Article
Thermodynamics
Zhao-Hui Ruan et al.
Summary: This study adopts a theoretical approach to predict the radiation properties of molten solar salt and identifies the main absorption region and refractive index peaks at its working temperature. Furthermore, the study determines the simulation size suitable for calculating related thermodynamic quantities.
Article
Chemistry, Multidisciplinary
Yun Zhang et al.
Summary: Atmospheric water harvesting (AWH) has attracted significant attention due to population growth, limited freshwater resources, and water pollution. By developing efficient, flexible, and lightweight AWH materials and utilizing radiative cooling technology, low-cost and efficient large-scale AWH applications can be achieved.
Article
Green & Sustainable Science & Technology
Mingke Hu et al.
Summary: This paper provides a comprehensive review of the history and recent advancements in the application of radiative cooling in various types of solar energy systems. It also discusses the challenges and opportunities in combining solar energy harvesting and radiative cooling.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Green & Sustainable Science & Technology
Yan Dong et al.
Summary: In this study, a PDRC coating with high solar reflectance and excellent cooling performance was prepared using the spectral band complementarity method. It has the potential for large-scale commercial production with a simple and low-cost manufacturing process.
Article
Green & Sustainable Science & Technology
Bin Zhao et al.
Summary: A silica micro-grating photonic cooler is proposed and demonstrated to radiatively cool solar cells, showing improved thermal emissivity and anti-reflection effect. The outdoor experiment shows that the proposed cooler can passively reduce the temperature of commercial silicon cell, enhancing the cooling potential and light trapping effect.
Review
Chemistry, Physical
Huatian Zhai et al.
Summary: This review provides an overview of the latest technological advances and prospects in the field of dynamic radiation regulations (DRR). It presents the fundamental principles of DRR, introduces emerging materials and strategies that adapt to different environments, and discusses the applications of DRR in energy-efficient green buildings and personal thermal management.
Article
Chemistry, Multidisciplinary
Shixiong Yu et al.
Summary: Developing colored radiative cooling materials is of great significance but remains challenging. This study presents a flexible colored radiative cooler based on interferometric retroreflection-induced structural color, which achieves subambient cooling even under strong sunlight. This finding could potentially replace commercial paint in practical applications, leading to reduced carbon emissions and energy consumption.
Article
Energy & Fuels
S. H. Jin et al.
Summary: This study proposes a design for colorful radiative cooling coatings using metallic nanoparticles and Y2O3 submicron particles. Through considering the scattering effects among particles and the localized surface plasmon resonance of metallic nanoparticles, these coatings can achieve a variety of colors and effective cooling effects.
Article
Energy & Fuels
Li Yu et al.
Summary: The integration of thermoelectrical power generator and passive daytime radiative cooling coating enables continuous power generation throughout the day with high output power density. By utilizing selective solar absorber and outer space cooling, electricity can be generated without the need for an artificial heat source.
Article
Thermodynamics
Meijie Chen et al.
Summary: Passive daytime radiative cooling is a promising alternative to compression-based cooling systems. A bilayer coating design is proposed to achieve colored passive daytime radiative cooling with optimized performance.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Zhang Aoyu et al.
Summary: Spectral radiative transfer between particles of dispersed particulate medium involves dependent scattering effects, but traditional criteria have limitations. To address this, a multi-particle averaging clearance method is proposed to reduce errors and extend the range of dependent scattering criteria.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Multidisciplinary
Xinping Zhang et al.
Summary: This study proposes the concept of utilizing biomimetic beetle cuticle structure for efficient radiative regulation and presents a low-cost biomimetic radiative cooling glass. The glass achieves multi-band spectral regulation, high transparency, esthetics, and energy conservation.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Multidisciplinary
ZiMing Cheng et al.
Summary: The study proposes a single-layer radiative cooling coating with a mixture of TiO2 and SiO2 particles and shows that it can achieve better performance in terms of reflectivity and emissivity compared to a double-layer coating. This numerical research provides theoretical guidance for the design and optimization of single-layer radiative cooling coatings containing mixed nanoparticles.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Review
Chemistry, Physical
Keng-Te Lin et al.
Summary: This review article provides a comprehensive understanding of radiative cooling technology and their applications, with a focus on the integration of radiative coolers with devices. It discusses the fundamental mechanism, characteristics, atmospheric influences, and photothermal manipulation of radiative cooling, as well as their impact on cooling performance. The challenges and future trends in this field are also highlighted, aiming to guide academic researchers and engineers in integrating radiative coolers with functional devices.
Article
Chemistry, Multidisciplinary
Kai Zhou et al.
Summary: The development of a nanoporous polymer matrix composite has enabled efficient subambient cooling under direct sunlight, showing potential for cost reduction and rapid production. This work holds promise for making radiative cooling technologies more viable in building cooling applications.
Article
Chemistry, Multidisciplinary
Meijie Chen et al.
Summary: Passive daytime radiative cooling (PDRC) is gaining attention for its ability to cool without electricity. Porous polymers are attractive due to their excellent performance and scalability. This study explores how PDRC performance is affected by pore properties, such as size and porosity, through optical simulations. The results show that mixed nanopores have higher solar reflectance than single-sized pores, and under a semi-humid atmospheric condition, using an AI substrate can significantly increase thermal emittance and net cooling power. These findings provide guidance for designing high-performance porous coatings for PDRC applications.
Article
Multidisciplinary Sciences
Shancheng Wang et al.
Summary: Researches have developed scalable smart windows that can automatically regulate radiative cooling capacity while maintaining transparency and modulating performance, suitable for self-adapting applications in different climate zones.
Article
Multidisciplinary Sciences
Kechao Tang et al.
Summary: This study focuses on developing a mechanically flexible coating that can adjust its thermal emittance at different ambient temperatures to improve energy efficiency. The temperature-adaptive radiative coating optimizes solar energy absorption and automatically switches thermal emittance based on ambient temperatures, outperforming existing roof coatings for energy saving in most climates.
Article
Energy & Fuels
Yongfeng Gao et al.
Summary: The study introduces a new porous polymer coating as a passive radiative cooler and evaluates its cooling performance under various conditions. Testing the radiative cooling performance in Shanghai for a whole year, the results show that the cooler can maintain excellent cooling effects throughout all seasons.
Article
Chemistry, Physical
Ziming Cheng et al.
Summary: This study proposes a novel approach using biomimetic wrinkle structure combined with optimized particles to achieve efficient optical property regulation in radiative cooling materials. The large-scale radiative cooling coating demonstrated high reflectance of solar irradiance and high emissivity in the atmospheric window band. Outdoor-building tests confirmed significant reductions in indoor air temperature and energy-saving rates exceeding 50% when using the coating.
Review
Chemistry, Physical
Xinxian Yu et al.
Summary: Researchers gathered information on 55 radiative cooling materials and grouped them into four categories based on selection criteria. Using an objective evaluation of their cooling performance and commercialization potential, they found that polymer-based porous structure and randomly distributed particle structure without reflective metal layer are more promising for commercialization.
Article
Chemistry, Physical
Shancheng Wang et al.
Summary: Researchers have proposed an ideal smart window design with switchable LWIR emissivity and solar modulation ability to cater to seasonal thermal performance requirements and energy-saving demands. They have fabricated a smart window with large tunability and proven its significantly enhanced energy-saving performance globally.
Article
Green & Sustainable Science & Technology
Abdul Samad Farooq et al.
Summary: This research introduces the working principle of radiative sky coolers and their importance in various applications, with a focus on the impact of advancements in nanotechnology and metamaterials on their performance improvement. Additionally, a detailed study on the structural characteristics of radiative sky coolers, the latest advancements in radiative materials, and emerging applications is conducted.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Nanoscience & Nanotechnology
Zhen Fang et al.
Summary: Thermal homeostasis maintains body temperature and ensures normal life activities, but current systems consume electricity. A novel program using thermochromic hydrogel's sunlight-scattering behaviors is proposed to achieve thermal homeostasis without external energy input, showing potential as a way towards zero-energy building.
Proceedings Paper
Materials Science, Multidisciplinary
Maneesh Reddy Venumbaka et al.
Summary: The study focuses on the enhancement patterns and resonances of SPP and BPP electric fields, proposing optimum structural parameters for enhancing materials like Ag, Au, and Cu in nanoparticle form through 3D FDTD simulations. Specific enhancements for nanoparticles of around 20 nm are discussed, along with the impact of coupling effects on Plasmonic Enhancements.
MATERIALS TODAY-PROCEEDINGS
(2021)
Article
Thermodynamics
Liang Huaxu et al.
Article
Nanoscience & Nanotechnology
Zhilin Xia et al.
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Materials Science, Multidisciplinary
Yun Ma et al.
ADVANCED OPTICAL MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Huaixia Zhao et al.
ADVANCED MATERIALS
(2020)
Article
Multidisciplinary Sciences
Haiwen Zhang et al.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Energy & Fuels
Cheng Ziming et al.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2020)
Article
Multidisciplinary Sciences
Xiuqiang Li et al.
NATURE COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Jyotirmoy Mandal et al.
ADVANCED FUNCTIONAL MATERIALS
(2018)
Article
Optics
Masashi Ono et al.
