Enhanced thermal conductivity of metallic nanoparticle packed bed by sintering treatment

Lin, Zizhen; Huang, Congliang; Zhen, Wen-Kai; Huang, Zhifeng

doi:10.1016/j.applthermaleng.2017.03.087

Cited by 35 publications

(10 citation statements)

References 21 publications

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“…The IR camera (FLUKE ti200) was used to capture the temperature distributions at the top of C‐PS/WF by infrared images. The thermal conductivity was measured at the temperature of 20°C by the hot wire method …”

Section: Methodsmentioning

confidence: 99%

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Solar vapor generation optimization of a carbon‐black/wood‐flour system with strength enhanced by polystyrene

Huang

Liu

et al. 2020

Int J Energy Res

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Summary A solar vapor generation system with a high evaporation efficiency and also a high mechanical strength is still attractive, while most previous works only focused on efficiency. Herein, we firstly prepared a carbon‐black/wood‐flour system with strength enhanced by polystyrene. Then, we investigated the effects of porosity, polystyrene content, and thermal insulation on the evaporation performance of the system. Experimental results indicate that the porosity of system can significantly affect the evaporation efficiency. With the increase of porosity, there exists an optimal porosity to obtain a high evaporation efficiency. A higher content of polystyrene, which could cause a lower thermal conductivity of the system, always gives a higher evaporation efficiency when the porosity is fixed. For polystyrene content of 60 wt% and system porosity of 36%, under a 1‐sun irradiation, there is an optimal evaporation efficiency of about 80.4%. Additionally, the fracture stresses of the system in dry and wet states could be as high as 2.18 and 2.03 MPa, respectively, which ensures the system strength. Considering the high efficiency, high mechanical strength, low cost, and easy preparation, this system has a good potential to be used in practical applications.

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Section: Methodsmentioning

confidence: 99%

“…The thermal conductivity was measured at the temperature of 20 C by the hot wire method. [46][47][48] The evaporation efficiency (η) is a critical index to assess the evaporation performance, which is calculated by…”

Section: Evaluation and Characterization Methodsmentioning

confidence: 99%

Solar vapor generation optimization of a carbon‐black/wood‐flour system with strength enhanced by polystyrene

Huang

Liu

et al. 2020

Int J Energy Res

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“…After obtaining the temperature–time curve, as shown in Figure 1c, the thermal conductivities of samples can easily be calculated by [37,38] k=q4πlnt2−lnt1T2−T1 where q is the electric heating power per unit length, and T1 and T2 are the temperatures at times t1 and t2, respectively. The instrumental error was less than 3%, and more details about this method can be found in our previous works [39,40,41].…”

Section: Methodsmentioning

confidence: 99%

Utilization of SiC and Cu Particles to Enhance Thermal and Mechanical Properties of Al Matrix Composites

Huang

Wang

et al. 2019

Materials

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In this work, SiC and Cu particles were utilized to enhance the thermal and mechanical properties of Al matrix composites. The ball-milling and cold-compact methods were applied to prepare Al matrix composites, and the uniform distribution of SiC and Cu particles in the composite confirms the validity of our preparation method. After characterizing the thermal conductivity and the compressibility of the prepared composites, results show that small particles have a higher potential to improve compressibility than large particles, which is attributed to the size effect of elastic modulus. The addition of SiC to the Al matrix will improve the compressibility behavior of Al matrix composites, and the compressibility can be enhanced by 100% when SiC content is increased from 0 to 30%. However, the addition of SiC particles has a negative effect on thermal conductivity because of the low thermal conductivity of SiC particles. The addition of Cu particles to Al-SiC MMCs could further slightly improve the compressibility behavior of Al-SiC/Cu MMCs, while the thermal conductivity could be enhanced by about 100% when the Cu content was increased from 0 to 30%. To meet the need for low density and high thermal conductivity in applications, it is more desirable to enhance the specific thermal conductivity by enlarging the preparation pressure and/or sintering temperature. This work is expected to supply some information for preparing Al matrix composites with low density but high thermal conductivity and high compressibility.

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“…To probe the capacity of the wood to maintain heat, the dry-wood and wet-wood thermal conductivities were both measured. [34][35][36][37][38] The dry-wood thermal conductivity is about 0.37 W·m −1 ·K −1 measured by hot-wire method, [39][40][41][42] much smaller than the one of water which is about 0.60 W·m −1 ·K −1 . [43][44][45][46] The low thermal conductivity can inhibit heat transporting into the bulk water.…”

Section: Bottom-layer Woodmentioning

confidence: 99%

High performance of carbon-particle/bulk-wood bi-layer system for solar steam generation

et al. 2018

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Summary To relieve the fresh water shortage, bi‐layer systems have been widely applied to give high efficiencies of solar steam generation. In current work, a bi‐layer system (C‐wood) is obtained with the low‐cost carbon particles as the light absorbing layer and the boxwood as the supporting layer. The application of wood could lead to both good water transportation and good local heat management in the system, and carbon particles could supply a high light absorptivity at a broad optical absorption wave bands (mostly larger than 98%), which results from the complex three‐dimensional porous structure formed by the wide‐size‐distribution carbon particles. Because simultaneously possessing a high light absorptivity, good water transportation, and good local heat management, the C‐wood system gives a 65% evaporation efficiency under an illumination power of 1 sun. This system is also durable for a future industry applications. Comparing the energy loss of the C‐wood system in the evaporation process with the ones of other systems prepared in this work, we conclude that a low top‐surface reflection of light of the C‐wood system should be responsible for the high evaporation efficiency. It demonstrates that the carbon particle is a promising material for an application in solar steam generation systems for easily accessible resources, low cost, and effective light absorptivity.

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Enhanced thermal conductivity of metallic nanoparticle packed bed by sintering treatment

Cited by 35 publications

References 21 publications

Solar vapor generation optimization of a carbon‐black/wood‐flour system with strength enhanced by polystyrene

Solar vapor generation optimization of a carbon‐black/wood‐flour system with strength enhanced by polystyrene

Utilization of SiC and Cu Particles to Enhance Thermal and Mechanical Properties of Al Matrix Composites

High performance of carbon-particle/bulk-wood bi-layer system for solar steam generation

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