Activated carbon and graphene nanoplatelets based novel composite for performance enhancement of adsorption cooling cycle

Animesh Pal, Kutub Uddin, Kyaw Thu, Bidyut Baran Saha

    研究成果: ジャーナルへの寄稿学術誌査読

    47 被引用数 (Scopus)

    抄録

    Adsorption cooling systems powered by low-grade thermal or renewable energy are considered as a potential alternative to the vapor compression systems. To improve the performance and compactness of the system, this study focuses on the synthesis and characterization of activated carbon (AC) composite employing graphene nanoplatelets (GNPs) namely H-grade and C-grade, and polyvinyl alcohol. The influence of GNPs on the porous properties, thermal conductivity, and ethanol adsorption characteristics of composites have been experimentally investigated. Porous properties results show that the studied composites possess high surface area and pore volume with microporous nature. The C-grade contained composite shows the higher porous properties compared to H-grade, however, thermal conductivity for the later one is the highest. The highest thermal conductivity is found to be 1.55 W m−1 K−1 for H-grade (40 wt%) contained composite which is 23.5 times higher than that of powder AC. Ethanol adsorption characteristics on studied composites are conducted gravimetrically at adsorption temperatures 30–70 °C. Experimental data are also fitted with Tóth and Dubinin-Astakhov (D-A) isotherm models within ±5% RMSD and found 23% improvement of effective volumetric uptake for H25 (20 wt%) composite compared to parent AC. The instantaneous ethanol adsorption uptake onto composites has also been presented for adsorption temperature 30 °C and evaporator pressure at 1.8 kPa.

    本文言語英語
    ページ(範囲)134-148
    ページ数15
    ジャーナルEnergy Conversion and Management
    180
    DOI
    出版ステータス出版済み - 1月 15 2019

    All Science Journal Classification (ASJC) codes

    • 再生可能エネルギー、持続可能性、環境
    • 原子力エネルギーおよび原子力工学
    • 燃料技術
    • エネルギー工学および電力技術

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