Feasibility investigation on using silver nanorods in energy saving windows for light/heat decoupling

Pu, Jihong; Shen, Chao; Yang, Siqi; Zhang, Chunxiao; Chwieduk, Dorota; Kalogirou, Soteris A.

doi:10.1016/j.energy.2022.123289

Cited by 53 publications

(7 citation statements)

References 43 publications

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“…In contrast, the low‐emission SPPA, with an emissivity of 41.3%, was selected as the radiation insulation material. [ 36,37 ]…”

Section: Resultsmentioning

confidence: 99%

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Asymmetrical Emissivity and Wettability in Stitching Treble Weave Metafabric for Synchronous Personal Thermal‐Moisture Management

Fan

et al. 2023

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Developing textiles with passive thermal management is an effective strategy to maintain the human body healthy as well as decrease energy consumption. Personal thermal management (PTM) textiles with engineered constituent element and fabric structure have been developed, however the comfortability and robustness of these textiles remains a challenge due to the complexity of passive thermal‐moisture management. Here a metafabric with asymmetrical stitching treble weave based on woven structure design and yarn functionalization is developed, in which the thermal radiation regulation and moisture‐wicking can be achieved simultaneously throughout the dual‐mode metafabric due to its optically regulated property, multi‐branched through‐porous structure and surface wetting difference. With simply flipping, the metafabric enables high solar reflectivity (87.6%) and IR emissivity (94%) in the cooling mode, and a low IR emissivity of 41.3% in the heating mode. When overheating and sweating, the cooling capacity reaches to ≈9 °C owing to the synergistic effect of radiation and evaporation. Moreover, the tensile strengths of the metafabric are 46.18 MPa (warp direction) and 37.59 MPa (weft direction), respectively. This work provides a facile strategy to fabricate multi‐functional integrated metafabrics with much flexibility and thus has great potential for thermal management applications and sustainable energy.

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“…In contrast, the low‐emission SPPA, with an emissivity of 41.3%, was selected as the radiation insulation material. [ 36,37 ]…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, the low-emission SPPA, with an emissivity of 41.3%, was selected as the radiation insulation material. [36,37] Perspiration evaporation plays a major role in human body heat dissipation during sweating. Our design integrates surface energy gradients and multiscale interconnected pores subtly.…”

Section: Resultsmentioning

confidence: 99%

Asymmetrical Emissivity and Wettability in Stitching Treble Weave Metafabric for Synchronous Personal Thermal‐Moisture Management

Fan

et al. 2023

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“…Measurements using an atomic absorption spectrophotometer with the spectral range of 200 nm–3000 nm light yielded a transmission rate of 83.5% for 253.7 nm UV for quartz glass and 0% for acrylic sheets. Therefore, quartz glass was used as the experimental one in this study and organic glass (acrylic sheets), which has a lower transmittance, 32 was used as the comparative group.…”

Section: Methodsmentioning

confidence: 99%

Effect of environmental factors on the concentration distribution of bioaerosols with different particle sizes in an enclosed space

Duan

Shen

Chen

et al. 2022

Indoor and Built Environment

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COVID-19 has alerted us about the need to quantify the effect of different environmental factors on the concentration distribution of bioaerosols. An experimental investigation was carried out to evaluate the effect of environmental factors, including air temperature, relative humidity, airflow speed and ultraviolet (UV) radiation, on the potential dispersion risk of bioaerosols in an enclosed space by tracking the Serratia marcescens as the tiny organisms. Research results indicated that the concentration of bioaerosols is the highest at the indoor air temperature of 25°C among the tested conditions (20°C, 25°C, 30°C and 35°C). The particle size of bioaerosols can be influenced by temperature, resulting in changes in the amount of settling. Increasing relative humidity from 50% to 80% and airflow speed from 1.5 m/s to 2.2 m/s have a negative impact on the dispersion of bioaerosols as the amount of particle settlement increases accordingly. As for the UV radiation parameters, a better disinfection efficiency was achieved at a radiation distance of 40 cm in the tested range of 20–50 cm and a radiation exposure time of 30 min in the tested range of 10–50 min. This study delivered novel data for the concentration distribution of bioaerosol under different environmental factors for creating a safe indoor environment.

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“…There is little research on spectrally selective transparent radiative cooling films based on doped nanoparticles, and most research on optical films capable of blocking NIR light is confined to the solar spectrum (0.3 μm < 𝜆 <2.5 μm). [29][30][31] By doping cesium-doped tungsten trioxide (CWO) nanoparticles with NIR shielding ability into poly(methyl methacrylate) (PMMA) and adjusting the mass fraction of nanoparticles, the nanocomposite has high visible light transmittance (>70%) and excellent NIR shielding ability (above 90%). [30] Since silver nanorods have a tunable plasma resonance band from the visible to the NIR wavelength, doping nanoparticles with different aspect ratios into PMMA can achieve excellent luminous transmittance and NIR radiation shielding performance.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Thermal Management Radiative Cooling Smart Window with Perfect Near‐Infrared Shielding

Hu,

Wang,

Zhu

et al. 2024

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The architectural window with spectrally selective features and radiative cooling is an effective way to save building energy consumption. However, architectural windows that combine both functions are currently based on micro‐nano photonic structures, which undoubtedly hinder their commercial application due to the complexity of manufacture. Herein, a novel tunable visible light transmittance radiative cooling smart window (TTRC smart window) with perfect near‐infrared (NIR) shielding ability is manufactured via a mass‐producible scraping method. TTRC smart window presents high luminous transmittance (Tlum = 56.8%), perfect NIR shielding (TNIR = 3.4%), bidirectional transparency adjustment ability unavailable in other transparent radiative coolers based on photonic structures (ΔTlum = 54.2%), and high emittance in the atmospheric window (over 94%). Outdoor measurements confirm that smart window can reduce 8.2 and 6.6 °C, respectively, compared to ordinary glass and indium tin oxide (ITO) glass. Moreover, TTRC smart window can save over 20% of annual energy in the tropics compared to ITO and ordinary glass. The simple preparation method employed in this work and the superior optical properties of the smart window have significantly broadened the scope of application of architectural windows and advanced the commercialization of architectural windows.

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Feasibility investigation on using silver nanorods in energy saving windows for light/heat decoupling

Cited by 53 publications

References 43 publications

Asymmetrical Emissivity and Wettability in Stitching Treble Weave Metafabric for Synchronous Personal Thermal‐Moisture Management

Asymmetrical Emissivity and Wettability in Stitching Treble Weave Metafabric for Synchronous Personal Thermal‐Moisture Management

Effect of environmental factors on the concentration distribution of bioaerosols with different particle sizes in an enclosed space

Adaptive Thermal Management Radiative Cooling Smart Window with Perfect Near‐Infrared Shielding

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