Dynamics of Water Adsorption on SAPO-34: Comparison of Three Adsorbent Bed Configurations of Adsorption Chillers Full article
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Applied Thermal Engineering
ISSN: 1359-4311 , E-ISSN: 1873-5606 |
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| Output data | Year: 2024, Volume: 256, Article number : 124058, Pages count : 10 DOI: 10.1016/j.applthermaleng.2024.124058 | ||
| Tags | Water adsorption dynamics; Adsorption chiller; SAPO-34; Adsorbent coating; Loose beads; Binder | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | FWUR-2024-0036 |
Abstract:
Intensification of the adsorption dynamics is a strategic way to make adsorption chillers and heat pumps more competitive with conventional vapour compression systems. This can be achieved by consolidating the adsorbent bed with a heat exchanger to enhance heat transfer. This work investigates the dynamics of water adsorption on a commercial adsorbent SAPO-34 for three bed configurations, namely, a reference bed consisting of a monolayer of loose beads located on an aluminium plate, and two consolidated beds – a monolayer of beads glued to the plate, and a homogeneous coating of the plate prepared with binder. The morphology and texture of the prepared beds were studied by optical and scanning electron microscope techniques as well as by low temperature nitrogen adsorption. Six binders involved, both organic (hydroxyethyl cellulose, polyvinylpyrrolidone, polyaniline) and inorganic (heat-conductive compound CPTD, bentonite clay, colloidal silica sol), produced varying effects. It was found that the most preferred configuration involves SAPO beads glued to the plate with bentonite for which the heat transfer was enhanced by a factor of 1.2–1.7 while maintaining sufficient mass transfer. The effective heat transfer coefficient was measured for the most promising binders and selected configurations, and varied between 120 and 248 W/(m2 K). The heat transfer acceleration permitted the specific cooling power (at a conversion of 0.8) to increase from 2.7 kW/kg for loose beads of 0.8–0.9 mm size to 3.5 kW/kg for the same beads bound with bentonite. Thus, gluing pre-made commercial adsorbent beads with heat-exchanger with suitable binders presents a simple and promising method to enhance the adsorption dynamics, resulting in a more compact design of adsorption chillers.
Cite:
Strelova S.V.
, Solovyeva M.V.
, Gordeeva L.G.
, Aristov Y.I.
Dynamics of Water Adsorption on SAPO-34: Comparison of Three Adsorbent Bed Configurations of Adsorption Chillers
Applied Thermal Engineering. 2024. V.256. 124058 :1-10. DOI: 10.1016/j.applthermaleng.2024.124058 WOS Scopus AN OpenAlex
Dynamics of Water Adsorption on SAPO-34: Comparison of Three Adsorbent Bed Configurations of Adsorption Chillers
Applied Thermal Engineering. 2024. V.256. 124058 :1-10. DOI: 10.1016/j.applthermaleng.2024.124058 WOS Scopus AN OpenAlex
Dates:
| Submitted: | Mar 20, 2024 |
| Accepted: | Jul 26, 2024 |
| Published online: | Jul 27, 2024 |
| Published print: | Nov 1, 2024 |
Identifiers:
| Web of science: | WOS:001290179700001 |
| Scopus: | 2-s2.0-85200518794 |
| Chemical Abstracts: | 2024:1711654 |
| OpenAlex: | W4401043737 |