Here, we develop a millimeter-scale passive isothermal film that maintains temperature near 25 °C without relying on energy consumption solely through natural phenomena. A radiative cooling unit...
Consequently, the gradient porous film demonstrates remarkable enhancements in solar-thermal management, achieving temperature reductions of 3.0 and 4.1 °C for unheated and spontaneously heated enclosed spaces, respectively, compared to uniform porous films.
Herein, we present a hierarchically porous hybrid film as a scalable and flexible thermal insulating subambient radiative cooler via a simple and inexpensive inverse high internal phase emulsion strategy.
Clearly, the solar reflectance and LWIR thermal emittance of the TiO 2 white coating film shown in Figures S8A and S8B exhibit a regular increasing trend with an increase in the TiO 2 -to-PDMS mass ratio from 5% to 40% and reach the highest level ( = 0.87, = 0.91) at a mass ratio of more than 50%.
The passive isothermal film consists of a radiative cooling unit, incorporating polydimethylsiloxane (PDMS) with a diffraction grating and fused SiO 2 /Ti/Ag sublayers, and a water desorption-driven endothermic reaction (WD-ER) unit.
However, the significant heating load is still required to achieve 25 °C at night. The passive isothermal film demonstrates a reduction of 4.8 °C in the maximum daytime temperature compared to the radiative cooling unit, while presenting a significant increase of the nighttime temperature by 13.6 °C.
Learn more. Solar-thermal regulation concerning thermal insulation and solar modulation is pivotal for cooling textiles and smart buildings. Nevertheless, a contradiction arises in balancing the demand to prevent external heat infiltration with the efficient dissipation of excess heat from enclosed spaces.
Here, we develop a millimeter-scale passive isothermal film that maintains temperature near 25 °C without relying on energy consumption solely through natural phenomena. A radiative cooling unit...
We present the concept of a solar thermo-photovoltaic (STPV) collection system based on a large-area, nanoimprint-patterned film of plasmonic structures acting as an integrated solar absorber/narrow-band thermal emitter (SANTE). The SANTE film concept is based on integrating broad-band solar radiation absorption with selective narrow-band ...
The gradient porous film, with its thermal rectification properties, effectively reconciles the conflicting demands of diverse thermal conductivity for cooling unheated and spontaneously heated enclosed spaces. Consequently, the gradient porous film demonstrates remarkable enhancements in solar-thermal management, achieving ...
The solar photothermal performance of pure FPI and FPI/PR composite films …
The main issue limiting the performance of the solar evaporators is that water-thermal management is difficult to coordinate. Herein, we achieve integrated water-thermal management by designing ...
Integration of the Janus films with commercial TEGs allows thermal concentration onto a small thermoelectric surface, yielding an open-circuit voltage of 308 mV under 102 mW/cm 2 natural sunlight illumination. Heat losses in commercial TEGs integrated with Janus films are reduced by approximately 50% while maintaining the same ...
In this study, a dual-mode Janus film with a bonded interface to gain dual-mode functions of both highly efficient radiative cooling and solar heating for year-round thermal management is designed and prepared.
The as-prepared porous hybrid film exhibits an intrinsic combination of high solar reflectance …
Furthermore, incorporating the Janus films into a conventional STEG with carbon-based solar absorbers significantly enhances solar-thermal-electric conversion performance, achieving an output power density of 1.3 W m –2. Our design of Janus photothermal films with oriented particle-in-cavity surfaces can be extended to various solar-thermal …
To enhance the thermal performance of building envelopes and maintain comfortable indoor thermal environments during winter through clean energy sources, a novel expanded perlite-based composite phase change …
The gradient porous film, with its thermal rectification properties, effectively …
Here, we develop a millimeter-scale passive isothermal film that maintains …
crystalline silicon-based (c-Si) solar cells or thin film technologies such as amorphous-based silicon (a-Si), cadmium telluride (CdTe) and copper indium gallium selenide (CIGS). Semi-transparency can be achieved with most technologies by either spacing the opaque solar cells or making the thin film layer transparent. However,
the interaction of MOST films with light, both monochromatic and the entire solar spectrum, as well as the corresponding dynamic energy storage. The model was experimentally verified by studying the optical response of thin MOST films containing norbornadiene derivatives as a functional system. We found that the MOST films
Herein, we report the design and fabrication of a new thermochromic porous …
Herein, a scalable porous film for thermal insulation, passive radiative cooling …
Request PDF | On Aug 22, 2023, Jiuao Wang and others published Highly Stretchable Ti 3 C 2 T x MXene-Integrated Phase Change Films for Solar-Thermal Harvesting and Infrared Stealth | Find, read ...
Here, a Janus film that integrates the two opposite requirements of heating and cooling into one functional dual-mode film is fabricated. In cooling mode, the Al backing and embedded silicon dioxide (SiO 2) microparticle can achieve a high solar reflectivity (∼0.85) and high IR emissivity (∼0.95) to induce a temperature drop of ...
Herein, we report the design and fabrication of a new thermochromic porous film (TMRC) with combined temperature-adaptive SAH and PRC performance to achieve "warm in winter and cool in summer" for all-year radiative cooling and solar heating. The porous structure and embedding thermochromic particles endow the TMRC with an ...
In this study, a dual-mode Janus film with a bonded interface to gain dual-mode functions of both highly efficient radiative cooling and solar heating for year-round thermal management is designed and prepared.
Heat energy is one of the most crucial energy sources for the development of human civilization [1].However, the difficult storage of vast amounts of thermal energy, such as that found in solar energy [2], geothermal energy [3], and industrial waste heat [4], significantly lowers the efficiency of energy utilization.Phase change materials (PCMs) can maintain a …
The as-prepared porous hybrid film exhibits an intrinsic combination of high solar reflectance (0.95), strong longwave infrared thermal emittance (0.97), and low thermal conductivity (31 mW/(m K)), yielding a subambient cooling temperature of ~8.4°C during the night and ~6.5°C during the hot midday with an average cooling power of ~94 W/m 2 ...
Here, a Janus film that integrates the two opposite requirements of heating and cooling into one functional dual-mode film is fabricated. In cooling mode, the Al backing and embedded silicon dioxide (SiO 2) microparticle can …
Thermal regulation of photovoltaic façade through passive air channel provides a cost effective measure for improving solar to electrical energy conve…
The solar photothermal performance of pure FPI and FPI/PR composite films was investigated by means of an IR thermal imager under simulated solar illumination with irradiation intensities of 500, 1,000, and 1500 W m −2.
Abstract For low-cost and lightweight polymer/plastic substrates in flexible building-integrated photovoltaic (BIPV) modules, low-temperature processing is essential. Amorphous silicon (a-Si:H) requires processing at a temperature of 200–250 °C by plasma-enhanced chemical vapor deposition to obtain satisfactory optoelectronic properties, which …
Buildings with a high window-to-wall ratio tend to suffer from excessive solar gains/losses that usually result in high energy demand and discomfort for occupants. Solar control films (SCFs) are a passive solution with the potential to increase the performance of new or refurbished glazing they are applied to. This paper presents a comprehensive literature review …
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