Modelling and experimental analyzes on air-fluidised silica gel-water adsorption and desorption

Rogala, Zbigniew; Kolasiński, Piotr; Gnutek, Z.

doi:10.1016/j.applthermaleng.2017.07.122

Cited by 25 publications

(17 citation statements)

References 16 publications

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“…On the other hand, thermal COP increases with the increase in the switching time. This results from the phenomena reported in [7]. Firstly, the cooling/heating provided to the bed with the air stream is spent on the change of desiccant temperature and then on adsorption/desorption (see, Figure 8a).…”

Section: The Effect Of Switching Timementioning

confidence: 82%

“…Then, the hot air enters the fluidised bed, where, as a result of the high temperature of the air, the desorption of water from the desiccant proceeds. At last, the regenerated air flows through the recovery heat exchanger (7).…”

Section: Modellingmentioning

confidence: 99%

“…The modelling of the above described FDC was carried out using our original, experimentally validated model, which is comprehensively described by Rogala et al [7]. The modelling is based on energy and conservation equations, which are used to calculate the temperature and humidity of the air at the outlet of the fluidised bed and the temperature of the desiccant.…”

Section: Modellingmentioning

confidence: 99%

“…This paper presents a modelling analysis of the influence of operating parameters on the performance of FDC, as well as on air desiccation (adsorption) and desiccant regeneration (desorption). The modelling was conducted using the model that was developed by the authors, which was comprehensively presented in the work of Rogala et al [7]. The operating parameters that were analyzed are the desiccant particle diameter, bed switching time (t sw ), superficial air velocities during adsorption (U ads ) and desorption (U des ), and desiccant filling height (H d ).…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Operating Parameters on Adsorption/Desorption Characteristics and Performance of the Fluidised Desiccant Cooler

2018

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This paper concerns the issue of the proper selection of the operating parameters of the fluidised desiccant cooler. Despite the fact that fluidised desiccant cooling technology is being reported in the literature as an efficient way to provide cooling for the purposes of airconditioning , the improper control of its operation can lead to a significantly worse performance than expected. The objective of the presented theoretical study is to provide guidelines on the proper selection of such operating parameters of a fluidized desiccant cooler, such as superficial air velocity, desiccant particle diameter, bed switching time, and desiccant filling height. The influence of the chosen operating parameters on the performance of fluidised desiccant cooling technology is investigated based on their impact on electric and thermal coefficients of performance (COP) and specific cooling power (SCP). Moreover, the influence of the outlet air temperature, humidity, and desiccant water uptake on the adsorption/desorption characteristics was investigated, contributing to better understanding of sorption processes.

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Section: The Effect Of Switching Timementioning

confidence: 82%

Section: Modellingmentioning

confidence: 99%

Section: Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Influence of Operating Parameters on Adsorption/Desorption Characteristics and Performance of the Fluidised Desiccant Cooler

2018

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“…An inclined-fluidized bed in the adsorption and desorption operations was carried out by Hamed [19]. Rogala et al considered air-fluidized systems developing a method for the prediction of silica gel-water adsorption [20].…”

Section: Introductionmentioning

confidence: 99%

Heat transfer in fluidized and fixed beds of adsorption chillers

et al. 2019

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An innovative idea, shown in the paper constitutes in the use of the fluidized bed of sorbent, instead of the conventional, fixed-bed, commonly used in the adsorption chillers. Bed–to–wall heat transfer coefficients for fixed and fluidized beds of adsorbent are determined. Sorbent particles diameters and velocities of fluidizing gas are discussed in the study. The calculations confirmed, that the bed–to–wall heat transfer coefficient in the fluidized bed of adsorbent is muchhigher than that in a conventional bed.

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