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2021 | OriginalPaper | Buchkapitel

3. Latest Developments in the Desiccant-Coated Dehumidifiers

verfasst von : Vivekh Prabakaran, Kian Jon Chua

Erschienen in: Advances in Desiccant Dehumidification

Verlag: Springer International Publishing

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Abstract

The performance of desiccant-coated heat exchangers (DCHEs) strongly depends on the sorption and desorption characteristics of the employed desiccant material. While several attempts have been made to synthesize superior desiccants, the DCHE performance has not reached its highest potential due to challenges associated with the limited working capacity of the conventional pure/composite desiccants. This chapter presents two novel advanced desiccants, namely, composite superabsorbent polymers (SAPs) and metal-organic frameworks (MOFs). The composite SAPs offer superior sorption capacity, faster kinetics, and low regeneration possibility while the MOFs providing excellent hydrophilicity and tailorable structures. These desiccants are deemed to be the next generation of advanced materials in thermally driven dehumidifiers. Aside from documenting the characteristics of these new materials, a detailed list of experimental and theoretical material characterization studies is provided. Isotherms and kinetics are identified as key properties that fundamentally govern the desiccant’s performance in dehumidifiers, and relevant experimental and regression techniques to analyze them are also presented. In addition, the transient performance of the superabsorbent polymer DCHEs is compared and benchmarked against silica gel-coated heat exchangers. Lastly, results from a series of parametric experiments are presented by varying different operating parameters, and their sensitivity towards dehumidification capacity and thermal energy efficiency is estimated.

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Titel: Latest Developments in the Desiccant-Coated Dehumidifiers
verfasst von: Vivekh Prabakaran
Kian Jon Chua
Verlag: Springer International Publishing
Buch: Advances in Desiccant Dehumidification
Print ISBN: 978-3-030-80842-6

Electronic ISBN: 978-3-030-80843-3

Copyright-Jahr: 2021
DOI: https://doi.org/10.1007/978-3-030-80843-3_3

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