Numerical investigation of membrane based heat exchanger with partially blocked channels

Sabek, S.; Tiss, F.; Chouikh, R.; Guizani, Amenallah

doi:10.1016/j.applthermaleng.2016.04.167

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…The simplest and most common configuration is cross-flow arrangement [16], modified flow configurations are quasi-counter current flow [17], Z-shaped flow [18], and mixed flow [19]. To intensify heat and mass transfer, channel structures including cross-corrugated triangle [20], partially blocked [21,22], spacer-filled [23], multichannel [24], new corrugated mesh spacer, and novel duct structures including curvature and circular [25] have been investigated. -…”

Section: Introductionmentioning

confidence: 99%

Effect of Geometric Parameters on the Performance of a Membrane‐Based Enthalpy Exchanger

et al. 2023

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A membrane‐based enthalpy exchanger (MBEE) with partial inlet is proposed. Numerical simulations were conducted to investigate the effect of Reynolds number (Re), the ratio of entrance area to channel cross‐sectional area Re−c, and channel length/width ratio Rl−w on the performance of the MBEE. Effectiveness, pressure loss, and flow patterns were evaluated for optimization. Moreover, the entransy theory was applied to analyze the mechanism of the heat transfer enhancement of the MBEE. The results indicate that the larger the Re–c, the higher the effectiveness and lesser pressure drop of the MBEE at the same volumetric flow rate. The total heat exchange rate per unit area and the pressure drop per unit length are reduced with the increasing of Rl–w .

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Section: Introductionmentioning

confidence: 99%

Effect of Geometric Parameters on the Performance of a Membrane‐Based Enthalpy Exchanger

et al. 2023

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“…These investigations were different in their natures: energy recovery or heat recovery simulation. The energy recovery process depends on the resulted energy transfer through the investigated membrane [29][30][31][32]with different flow configuration: hybrid flow [33][34][35][36], Counter [37,38], cross flow [39], parallel flow [40], two dimensional CFD model of parallel flow [41]. The heat recovery process is based on heat transfer process only [42].…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of Energy Transfer within a Membrane Heat Exchanger under Turbulent Flow

2023

jjmie

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Air-to-air fixed plate enthalpy membrane exchanger is considered one of the equipment used in energy recovery services. Thermal performance of air-to-air energy recovery ventilator is examined numerically using a 3D CFD simulation. Air flow inside the exchanger is tested using four numerical turbulence models: Standard k-ε, k-ε renormalization group (RNG), k-ε realizable and k-ω shear-stress transport (SST) models. The adopted heat and mass exchange element within the ventilator (membrane) is a thin 98 µm porous 60 gsm Kraft paper. A user defined function (UDF) has been developed to enable the CFD model to estimate amounts of mass exchanged between the two sides of the membrane. Grid dependency study is conducted and results have shown that a perpendicular distance of 50 m or less from the membrane surface would result in a negligible variation in the ERV thermal effectiveness. The validated CFD model and UDF code against experimental measurement resulted in a maximum difference in thermal effectiveness of 3.6%. Results have shown that the SST k-ω turbulence models under enhanced wall treatment showed more sensitivity to flow at all Re values when compared with the k-ε simulated models.

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“…Numerical simulations of other kinds of channels are also widely reported. Sabek et al (2016) found that the obstacles in the membrane channel could enhance the heat transfer. Sabek et al (2017) suggested that changing the geometry of the channel caused mixing in the flow and destroyed the boundary layer, which was also a means of heat transfer enhancement.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Periodically Fully-Developed Flow and Heat Transfer in Channels With Periodic Semi-Circular Tube

Zhang¹,

Yang²,

Zhang³

2019

Frontiers in Heat and Mass Transfer

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The periodically fully-developed flow and heat transfer in channels with periodic semi-circular tube is studied numerically by the direct numerical simulation (DNS), the large eddy simulation (LES), and the Reynolds stress model (RSM). When the Reynolds number is between 3000 and 25000, the Nusselt number obtained by the RSM is closer to the experimental results than the results obtained from other turbulence models. The nonlinear characteristics of flow and heat transfer is revealed based on the results of numerical simulation. When Reynolds number is high, the geometric structure and boundary conditions of the channel are symmetric, but the flow field in the channel is asymmetric. With increasing Reynolds number, the flow and heat transfer in channels experiences steady state, periodic oscillations, and finally chaos. Moreover, Nusselt number increases gradually with the decrease of tube spacing at the same Reynolds number. Among all cases considered in this paper, the maximum Nusselt number is 15.22 times of the minimum Nusselt number.

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Numerical investigation of membrane based heat exchanger with partially blocked channels

Cited by 14 publications

References 34 publications

Effect of Geometric Parameters on the Performance of a Membrane‐Based Enthalpy Exchanger

Effect of Geometric Parameters on the Performance of a Membrane‐Based Enthalpy Exchanger

CFD Simulation of Energy Transfer within a Membrane Heat Exchanger under Turbulent Flow

Numerical Study of Periodically Fully-Developed Flow and Heat Transfer in Channels With Periodic Semi-Circular Tube

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