Applied thermal engineering2022，Vol.21013.DOI:10.1016/j.applthermaleng.2022.118359

Adsorption of difluoromethane onto activated carbon based composites: Adsorption kinetics, heat of adsorption, cooling performance and irreversibility evaluation

Yagnamurthy, Sai Rakshit, Dibakar Jain, Sanjeev Rocky, Kaiser Ahmed Islam, Md. Amirul Saha, Bidyut Baran
Applied thermal engineering2022，Vol.21013.DOI:10.1016/j.applthermaleng.2022.118359
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  • NSTL
  • Elsevier

Adsorption of difluoromethane onto activated carbon based composites: Adsorption kinetics, heat of adsorption, cooling performance and irreversibility evaluation

Yagnamurthy, Sai 1Rakshit, Dibakar 1Jain, Sanjeev 1Rocky, Kaiser Ahmed 2Islam, Md. Amirul 2Saha, Bidyut Baran2
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作者信息

  • 1. Indian Inst Technol Delhi
  • 2. Kyushu Univ
  • 折叠

Abstract

To further the research on R32 refrigerant-based adsorption cooling applications, Maxsorb-III activated carbon composites synthesized with the additives of H25 Graphene nanoplatelets (GNP), 1-Hexyl-3-methylimidazolium bis(trifluormethylsulfonyl)imide ([HMIM][Tf2N]) ionic liquid with polyvinyl alcohol (PVA) are studied for cooling performance evaluation. Their respective kinetic characteristics and heat of adsorption assessments are carried out for this purpose in the present study. The adsorption kinetics characteristics are studied using gravimetrically for the composite samples. A first-order kinetics model is seen to fit their kinetic uptakes with regression coefficients >= 0.97. The heat of adsorption estimates of the composites for varying uptakes and temperatures are numerically evaluated, incorporating the non-ideal behavior of the refrigerant. An approach for a holistic comparison of the cooling performances of the composites containing their respective heat and mass transfer characteristics for compact heat exchanger designs is further proposed. While the composite with the highest Maxsorb-III mass fraction yields the highest specific and volumetric cooling powers, the composite with the highest thermal conductivity requires the lowest heat exchanger area with a slightly larger adsorbent volume of around 12.1% over the former. A second law thermodynamic analysis is further carried out to evaluate the composite performances for cooling applications.& nbsp;

Key words

Activated carbon/Adsorption kinetics/Cooling energy/Graphene nanoplatelets/Heat of adsorption/Ionic liquid/DYNAMICS/CHILLER/ETHANOL/PUMPS/MODEL/SIZE

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出版年

2022
Applied thermal engineering

Applied thermal engineering

EISCI
ISSN：1359-4311
被引量4
参考文献量38
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