Open solid desiccant cooling air systems: A review and comparative study

Zouaoui, Ahlem; Zili-Ghedira, Leila; Nasrallah, Sassi Ben

doi:10.1016/j.rser.2015.10.055

Cited by 50 publications

(7 citation statements)

References 77 publications

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“…Desiccant evaporative cooling cycles can significantly contribute to develop Heating, Ventilating and Air Conditioning (HVAC) systems characterized by high energy efficiency and low environmental impact [1,2]. At present, attention is given to the development of new sorption compounds, in particular aimed at reducing the regeneration temperature [3].…”

Section: Introductionmentioning

confidence: 99%

Composite silicone-SAPO-34 foams: experimental characterization for open cycle applications

et al. 2019

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In this work, novel composite silicone-SAPO-34 foams have been prepared and experimentally characterized for application in desiccant open cycles. Water adsorption isotherms of several samples have been measured by a gravimetric dynamic vapour sorption analyser at 30°C and 70°C up to the relative humidity RH= 75%, representing typical process and regeneration air conditions in desiccant evaporative cooling cycles. Adsorbent foams manufactured with 20%, 40% and 60% weight fraction of SAPO-34 have been compared with the pure SAPO-34 powder. Results highlighted that the prepared foams adsorb a significant amount of water, according to the initial mass fraction of zeolite used in the compound. Moreover, the tested foams exhibited sufficiently fast water sorption rate for practical application in a desiccant open cycle system.

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Section: Introductionmentioning

confidence: 99%

Composite silicone-SAPO-34 foams: experimental characterization for open cycle applications

et al. 2019

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“…A major research topic in the field of adsorption systems for solar thermal energy storage, air-conditioning and dehumidification processes involves the development of new or modified adsorbent materials with enhanced adsorption and thermo-physical properties, low cost, high stability, and low regeneration temperature [1][2][3][4][5]. Possible adsorbent classes are zeolites, silica gels, activated carbons, metal organic frameworks (MOFs), and composite adsorbents made of a sorbent matrix embedding a hygroscopic salt [6].…”

Section: Introductionmentioning

confidence: 99%

Modified Silicone-SAPO34 Composite Materials for Adsorption Thermal Energy Storage Systems

et al. 2020

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In this work, novel silicone-SAPO34 composite materials are proposed for application in adsorption thermal energy storage systems. The innovative composite materials were obtained through a mold foaming process activated by a dehydrogenative coupling reaction between properly selected siloxane compounds. Morphology analysis by optical microscopy and measurement of the mechanical properties of the foamed materials at varying zeolite content demonstrated a quite homogeneous open-cell structure and good structural stability of the foam. Water adsorption isotherms of the adsorbent foams expanded in free space and inside paperboard were measured by a gravimetric adsorption apparatus, demonstrating that the presence of the polymeric fraction does not affect the adsorption capacity of the SAPO34 fraction added in the composite foam. Finally, main adsorption and thermodynamic properties of the proposed foam have been compared with those of other adsorbent materials, confirming the possible use of these new composite foams as adsorbent materials for adsorption thermal energy storage systems.

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Section: Introductionmentioning

confidence: 99%

“…Zouaoui et al [1] mentioned that dehumidification by adsorption is a physical process resulting from the pressure difference of water vapor between the desiccant surface and the surrounding air. Silica gel is one of the common adsorbents because of its numerous advantages such as larger pores, larger surface area, and excellent dehumidification capability [1]. In fact, desiccant devices using silica gel as an absorbent have been widely used for dehumidification in many industrial areas [2] in addition to its use in air conditioning systems coupling with a heat source [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Desiccant Dehumidifier with a Heat Recovery Unit

Yang

Wang²,

Wu³

et al. 2017

Energies

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Abstract:In order to effectively increase the drying rate and reduce the energy consumption, a dryer which reduces the air humidity at the dryer inlet using desiccant and regenerates the desiccant by recovering waste heat using a heat pipe heat exchanger was developed in this study. Both the adsorption rate and desorption rate of the dryer were measured at several ambient temperatures ranging from 15 • C to 35 • C, relative humidity levels of air ranging from 20% to 85%, and airflow rates ranging from 30 m 3 /h to 150 m 3 /h. The results showed that the adsorption rate in an environment of high relative humidity of air was 4.89 times higher than that of low relative humidity of air at 15 • C. Moreover, the difference in adsorption rate between two given relative humidity of air increased as the ambient temperature decreased. The specific energy consumption estimated with both energy consumption during desorption and the desorption rate indicated that the energy consumption was 8.27 kJ/g H 2 O without using recovered heat, while the energy consumption was 4.77 kJ/g H 2 O using recovered heat at 130 • C.

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Open solid desiccant cooling air systems: A review and comparative study

Cited by 50 publications

References 77 publications

Composite silicone-SAPO-34 foams: experimental characterization for open cycle applications

Composite silicone-SAPO-34 foams: experimental characterization for open cycle applications

Modified Silicone-SAPO34 Composite Materials for Adsorption Thermal Energy Storage Systems

Performance Evaluation of a Desiccant Dehumidifier with a Heat Recovery Unit

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