Sustainable Energy Technologies and Assessments
·
2022
·
IF 7.632
Zhenxing Fang,Yuhang Lin,Junjie Zheng,Jiefeng Yan,Wenwen Wang,Wenge Zheng,Guangsheng Pang
Solar steam generation and re-condensing into water is an effective way to lighten water scarcity caused by unreasonable waste of water. In this report, superhydrophobic, high thermal conductive aluminum and superhydrophilic glass was applied as condensing system and anti-fogging unit to ensure highly efficient process of drinkable water collection. The nanowire array of copper sulfide with nanorod array architecture guarantees strong solar absorption, which was used as photothermal conversion membrane to evaporate water. The efficiency of photothermal conversion to steam generation reached up to 81% under 1 sun illumination. Etching and surface modification was applied on high thermal conductive aluminum and glass to obtain a superhydrophobic and superhydrophilic surface nature. These three synergies of nanorod array architecture, anti-fogging glass and high-efficiency condensing system made the solar distiller a highly water collection efficiency up to 66%.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Bowen Zhang,Xinyan Lu,Haonan Feng,Youzheng Wang,Yi Liu,Yun-Hui Mei
The high-power density of silicon carbide (SiC) devices requires the development of thermal interface materials (TIM) for rapid heat dissipation between direct bond copper (DBC) substrate and heat sink. However, the insufficient oxygen in the central bonding layer prevents the complete decomposition of organic solvents in silver paste, resulting in weak thermal dissipation. In this study, the Self-Oxygenation silver paste (SO-Ag) was successfully developed to promote the complete decomposition of organic solvents in N 2 environment, with -C-O- peak energy residual of 0.35 %. The in-situ generation of silver nanoparticles effectively enhanced the necking growth and achieved a highly reliable large-area bonding of 25 × 25 mm 2 under a pressureless sintering process. Taking advantage of the dense bonding layer and uniform porosity distribution, the proposed SO-Ag paste effectively mitigates the heat accumulation and reduces the chip temperature from 314 °C to 47 °C under forced water convection conditions. Furthermore, after 1000 cycles of thermal shock test (TST), the thermal resistance of SO-Ag increased by only 28 % without heat accumulation, indicating superior thermal reliability. The results confirm the superior thermal dissipation reliability of proposed SO-Ag, which enables the long-term operation of SiC devices.
研究领域:
材料科学
·
热工学
·
电力电子
·
纳米技术
·
电子封装
✓ 已验证
产品关联
DOI
高影响因子
Materials Advances
·
2024
·
IF 5.2
Kaifen Yan,Weifeng Zhang,Xue Feng,Weiyun Zhao,Lingling Wu,Yuan Deng
Heat dissipation is critical for energy efficiency; high operating temperatures can even cause electronic device failure. Herein, a high heat dissipation strategy is proposed and applied to a passive composite heat sink (CHS) by combining a porous hydrogel with fin. The heat generated by the devices can be dissipated utilizing the evaporation latent heat of the water in the multi-scale porous hydrogel and the increased heat dissipation area of the composite finned structure. The heat transfer coefficient of the CHS can reach 60 W m−2 K−1, which is six times higher than that of natural convection and comparable to that of forced air convection. Moreover, rehydration can be achieved with zero energy consumption. The CHS is able to enhance the temperature difference of the thermoelectric generator (TEG) and improve the output performance by 4–10 times. In addition, it can lower the operating temperature of electronic devices and solar cells, which can be maintained at about 60 °C when the heat load is 10 W. As a result of excellent cooling performance and zero energy consumption properties, the CHS has potential applications in the fields of thermoelectric devices, electronic products, and solar photovoltaic power generation.
研究领域:
材料科学
·
热能工程
·
电子学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jian Xu,Xin Liu,Zikang Yu,Hongjin Zhang,Zixiang Zhang,Yun Mou,Mingxiang Chen,Yang Peng,Qing Wang
Laser-driven white lighting is believed to be a future-oriented high-brightness solid-state light (SSL) source, which is confronted with a severe challenge in developing a laser-driven color converter with efficient thermal management. Herein, a unique architecture of phosphor-in-glass film bonded with a microchannel cooling (PiGF-MC) converter was proposed to enable high luminescence saturation for high-brightness laser-driven white lighting. The PiGF consisted of yellow-emitting Y 3 Al 5 O 12 :Ce 3+ (YAG) was sintered on an alumina substrate and then soldered on a liquid-cooled microchannel radiator, which realizes outstanding heat dissipation performance of laser-driven PiGF. The PiGF-MC converter possesses luminance saturation threshold under a high laser power density of 21 W mm −2 , 2.3 times that of the traditional PiGF-alumina converter (∼9 W mm −2 ). High-brightness laser-driven white light is achieved by the PiGF-MC with a high luminous flux of 2953 lm@21 W mm −2 , and long-term stable optical performance is simultaneously realized. The working temperatures of laser-driven PiGF-MC are all lower than 200 °C under various laser powers. This finding demonstrates the broad prospect of the proposed PiGF-MC converter architecture for next-generation high-brightness laser-driven white lighting.
研究领域:
光学
·
材料科学
·
热能工程
·
照明技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）