Study on the influence of adsorbent particle size and heat exchanger aspect ratio on dynamic adsorption characteristics

Mitra, Sourav; Muttakin, Mahbubul; Thu, Kyaw; Saha, Bidyut Baran

doi:10.1016/j.applthermaleng.2018.01.015

Cited by 56 publications

(17 citation statements)

References 50 publications

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“…This performance is also relevant to the reported performance for activated carbon-ethanol pair in other studies previously. The specific cooling capacity for activated-carbon ethanol pair considering two different particle size and three different domains has been reported between the range of 424 and 710 W/kg ac by Sourav et al [24]. Besides, the performance of activated carbon fiber-ethanol based adsorption cooling system was found 200 W/kg for SCP and 0.65 for COP previously [17].…”

Section: Performance Investigationmentioning

confidence: 89%

Numerical Investigation of Small-Scale Adsorption Cooling System Performance Employing Activated Carbon-Ethanol Pair

et al. 2018

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Adsorber heat exchanger design has great importance in increasing the performance of the adsorption-based cooling system. In this study, a transient two-dimensional axisymmetric Computational Fluid Dynamics (CFD) model has been developed for the performance investigation of finned tube type adsorber using activated carbon and ethanol as the working pair. The operating conditions of the cooling system were 15, 20 and 80 for evaporation, cooling and heating temperatures, respectively. The simulated temperature profiles for different adsorbent thicknesses were validated with those from experimental data measured in our laboratory. Moreover, the error in mass and energy balance were 3% and 7.88%, respectively. Besides, the performance investigation has been performed for cycle time ranging from 600 s to 1400 s. The optimum cycle time was 800 s and the corresponding evaluated specific cooling power (SCP) and coefficient of performance (COP) were found to be 488 W/kg and 0.61, respectively. The developed CFD model will be used for fin height and fin pitch optimization and can be extended to other adsorbent-adsorbate based adsorption cooling system.

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Section: Performance Investigationmentioning

confidence: 89%

Numerical Investigation of Small-Scale Adsorption Cooling System Performance Employing Activated Carbon-Ethanol Pair

et al. 2018

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“…Solving the intra-particle mass balance equations is often timeconsuming. To avoid this problem, in practice often a lumped approach is followed as an approximation, which has proven to be physically consistent [14,46]. The reaction term in Eq.…”

Section: Reaction Kineticsmentioning

confidence: 99%

Performance analysis of a K2CO3-based thermochemical energy storage system using a honeycomb structured heat exchanger

Kant

Shukla

Smeulders

et al. 2021

Journal of Energy Storage

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“…In contrast to the LPM, the present model includes the effects of geometric features (fin height, fin spacing, tube diameter, and thickness) and considers the contact resistance between the sorbent material and metallic finned tube, which affirmatively enhances the accuracy of the analysis. There were a lot of studies on geometric optimization in adsorption beds [4,13,[25][26][27]. Also, recent coating technology has made it possible to reduce contact resistance and tremendously enhance performance (Rezk [28], Girnik and Aristov [29]).…”

Section: Effect Of Bed Modelmentioning

confidence: 99%

Effects of Evaporator and Condenser in the Analysis of Adsorption Chillers

et al. 2020

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In a survey of the literature from the last 20 years, 20% of the numerical models used to analyze the performance of adsorption chillers assumed the evaporator and condenser were ideal, with a fixed evaporation temperature and condenser temperature, and ignored interactions between the adsorption bed and evaporator/condenser. Even when the interaction with the evaporator and condenser was included, the other 80% of studies modeled the adsorption bed based on the LPM (lumped parameter method), which ignores the geometry effect and contact resistance of the bed, and thus reduces the accuracy of the analysis. As a consequence, these earlier numerical studies overestimated the system performance of the adsorption chiller. In this study, we conducted a refined numerical approach which avoids these limitations, producing estimates in close agreement with experimental results. Compared with our approach, the models with ideal treatment of evaporator and condenser overestimated COP (coefficient of performance) and SCP (specific cooling power) by as much as 16.12% and 24.64%, respectively. The models based on LPM overestimated COP and SCP by 22.82% and 11.28%, compared to our approach.

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Study on the influence of adsorbent particle size and heat exchanger aspect ratio on dynamic adsorption characteristics

Cited by 56 publications

References 50 publications

Numerical Investigation of Small-Scale Adsorption Cooling System Performance Employing Activated Carbon-Ethanol Pair

Numerical Investigation of Small-Scale Adsorption Cooling System Performance Employing Activated Carbon-Ethanol Pair

Performance analysis of a K2CO3-based thermochemical energy storage system using a honeycomb structured heat exchanger

Effects of Evaporator and Condenser in the Analysis of Adsorption Chillers

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