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http://dx.doi.org/10.6110/KJACR.2013.25.12.660

Validity of Inter-Particle Models for the Mass-Transfer Kinetics of a Fin-Tube-Type Adsorption Bed  

Ahn, Sang Hyeok (Department of Mechanical Engineering, Sejong University)
Hong, Sang Woo (Department of Mechanical Engineering, Sejong University)
Kwon, Oh Kyung (Energy System R&D Group, Korea Institute of Industrial Technology)
Chung, Jae Dong (Department of Mechanical Engineering, Sejong University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.25, no.12, 2013 , pp. 660-667 More about this Journal
Abstract
This study presents a numerical investigation of the heat and mass transfer kinetics of a fin-tube-type adsorption bed using a two-dimensional numerical model with silica-gel and water as the adsorbent and refrigerant pair. The performance is strongly affected by the heat and mass transfer in the adsorption bed, but the details of the mass transfer kinetics remain unclear. The validity of inter-particle models used to simulate mass-transfer kinetics were examined, such as a constant pressure model and non-constant pressure model, and the valid ranges of the diffusion ratio for each model are proposed. The COP and SCP have been numerically calculated as the performance indexes according to the diffusion ratio. The constant pressure model, which is commonly used in previous research, was found to be valid only in a limited range of diffusion ratio.
Keywords
Adsorption chiller; Adsorption rate; Inter-molecular mass transfer; Constant-pressure model; Nonconstant-pressure model; Diffusion ratio;
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