Improving the performance of adsorption heat exchangers using a finned structure

Experimental Investigation of the Adsorption and Desorption Kinetics on an Open-Structured Asymmetric Plate Heat Exchanger; Matching Between Small-Scale and Full-Scale Results

“…Several communications addressed the optimization of the distance between the fins and fin geometry, thickness, and height (Li et al, 2004;Niazmand and Dabzadeh, 2012;Çaǧlar, 2016)However, the effect of the thermal resistance at the fin-root-surface interface on the overall heat transfer coefficient is usually ignored, which should not be the case. Many studies demonstrated that, this interfacial heat transfer resistance governs the heat transfer in the Ad-HEx and, hence, its performance (Hajji & Khalloufi, 1996;Waszkiewicz et al, 2009;Gordeeva et al, 2014;Golparvar et al, 2018). Ilis et al (2019) investigated numerically the performance of an innovative star-shaped finned tube Ad-HEx.…”

Experimental investigation on the performance of packed tower for regeneration of liquid desiccant

“…It can be achieved by either cooling or absorption/adsorption of moisture by solid or liquid desiccants. The liquid desiccant air-conditioning system has been proposed as an alternative to the conventional vapor compression cooling systems to control air humidity, especially in hot and humid areas, due to its advantage in removing the latent load as well as the potential to remove number of pollutants from the air stream [1][2][3][4][5][6][7][8][9][10][11]. Liquid desiccant generally has a lower water vapor partial pressure than air at the same temperature, as a result of this; desiccants can absorb moisture from air when they are brought into contact.…”

A calorimetric test of adsorbent-coated fins

“…Finned designs have been employed for heat recovery from engine exhaust; selection of zeolite-13 X as adsorbent has permitted bed temperatures of up to 240°C during regeneration [8]. Proposed mathematical models of adsorbent heat exchangers [9] [10] covering intra-grain mass and heat transfer, the two dimensional temperature patterns in the sorbent layer, the thermal coupling to the substrate, and measured adsorption rates and adsorption capacities. (The adsorption capacities for small samples of adsorbent might well be assessed gravimetrically, nowadays by magnetic levitation balance [11] [12] .)…”