Theoretical and experimental analysis of multi-effect air gap membrane distillation process (ME-AGMD)

Pangarkar, Bhausaheb L.; Deshmukh, Samir K.

doi:10.1016/j.jece.2015.07.017

Cited by 50 publications

(8 citation statements)

References 35 publications

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“…The heat transfer mechanisms at the third region (cold side) of both AGMD and VA-AGMD are represented by Equations (18-23) (Table 4), as reported in recent studies (Khalifa et al, 2015;Pangarkar and Deshmukh, 2015;Swaminathan et al, 2016a;Attia et al, 2017;Hitsov et al, 2017a). The expressions from Equations (1-9) are also applicable to obtain heat transfer at the first and second regions of both AGMD and VA-AGMD.…”

Section: Heat Transport Mechanisms In MD Configurationsmentioning

confidence: 98%

“…The expressions from Equations (1-9) are also applicable to obtain heat transfer at the first and second regions of both AGMD and VA-AGMD. Khalifa et al, 2015;Pangarkar and Deshmukh, 2015;Attia et al, 2017;Hitsov et al, 2017a Heat transfer from condensate film to cooling plate Khalifa et al, 2015;Pangarkar and Deshmukh, 2015;Attia et al, 2017;Hitsov et al, 2017a Heat transfer through cooling plate Khalifa et al, 2015;Pangarkar and Deshmukh, 2015;Attia et al, 2017;Hitsov et al, 2017a Heat transfer in cooling fluid Khalifa et al, 2015;Pangarkar and Deshmukh, 2015;Attia et al, 2017;Hitsov et al, 2017a Surface temperature on feed side Pangarkar and Deshmukh, 2015;Attia et al, 2017;Hitsov et al, 2017a Condensate film temperature Pangarkar and Deshmukh, 2015;Attia et al, 2017;Hitsov et al, 2017a In Equations18-23 for AGMD modeling, Q ag , Q cd , Q cp , and Q cf (W/m 2 ) are heat fluxes through air gap, condensation film, cooling plate, and cooling fluid, respectively. As shown in Figure 3, T cd , T p1 , T p2 , and T cf are temperature of condensation film, surface temperature at condensation side of cooling plate, surface temperature at cold side of cooling plate, and temperature at the bulk cooling film, respectively.…”

Section: Heat Transport Mechanisms In MD Configurationsmentioning

confidence: 99%

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Heat and Mass Transport in Modeling Membrane Distillation Configurations: A Review

2018

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Identification and mitigation of challenges associated with membrane distillation (MD) modeling are very crucial to the applicability of MD technology in the industry. Several research studies have been carried out on direct contact membrane distillation (DCMD) modeling because of its simplicity, while other MD configurations have gained little attention. Most studies conducted on MD modeling were achieved based on uniform membrane pore size and pore size distribution assumption. This study exploits the homogeneity of these assumptions to conduct a modeling review for temperature polarization (TP) and concentration polarization (CP), as they apply to MD configurations. TP and CP phenomena have been identified as two of the main challenges to advance MD modeling for further development of MD technology. Their impact are detailed in the heat and mass transfer mechanisms discussed. Thermal conductivity of common hydrophobic commercial membrane materials at different temperatures are presented in this study. The use of optimal operating flow rates, suitable membranes, and proper module design are recommended as viable solutions to reduce the effect of TP and CP on permeate flux decay.

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Section: Heat Transport Mechanisms In MD Configurationsmentioning

confidence: 98%

Section: Heat Transport Mechanisms In MD Configurationsmentioning

confidence: 99%

Heat and Mass Transport in Modeling Membrane Distillation Configurations: A Review

2018

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“…Finally, the pressure-diffusivity product PD can be calculated as follows (Pangarkar and Deshmukh, 2015):…”

Section: Specific Equations For the Agmd Unitmentioning

confidence: 99%

Simulation of heat pumps for simultaneous heating and cooling using CO2

Diaby

Byrne

Maré

2019

International Journal of Refrigeration

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“…There are mainly two types of MD systems: gap membrane distillation (GMD) [ 21 , 22 , 23 , 24 , 25 , 26 ] and direct contact membrane distillation (DCMD) [ 27 , 28 , 29 ]. Many other MD systems are based on the two configurations [ 30 , 31 ]. They have different advantages but share a common feature that there are two liquid circulations, hot feed and liquid coolant (usually cold water), to provide a temperature gradient as the driving force to make mass transfer across the membrane.…”

Section: Introductionmentioning

confidence: 99%

Mass Transfer Analysis of Air-Cooled Membrane Distillation Configuration for Desalination

2021

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It has been proposed that the air-cooled configuration for air gap membrane distillation is an effective way to simplify the system design and energy source requirement. This offers potential for the practical applications of membrane distillation on an industrial scale. In this work, membrane distillation tests were performed using a typical water-cooled membrane distillation (WCMD) configuration and an air-cooled membrane distillation (ACMD) configuration with various condensing plates and operating conditions. To increase the permeate flux of an ACMD system, the condensing plate in the permeate side should transfer heat to the atmosphere more effectively, such as using a more thermally conductive plate, adding fins, or introducing forced convection air flow. Importantly, a practical mass transfer model was proposed to describe the ACMD performance in terms of permeate flux. This model can be simplified by introducing specific correction values to the mass transfer coefficient of a WCMD process under the same conditions. The two factors relate to the capacity (B) and the efficiency (σ), which can be considered as the characteristic factors of a membrane distillation (MD) system. The experimental results are consistent with the theoretical estimations based on this model, which can be used to describe the performance of an MD process.

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Theoretical and experimental analysis of multi-effect air gap membrane distillation process (ME-AGMD)

Cited by 50 publications

References 35 publications

Heat and Mass Transport in Modeling Membrane Distillation Configurations: A Review

Heat and Mass Transport in Modeling Membrane Distillation Configurations: A Review

Simulation of heat pumps for simultaneous heating and cooling using CO2

Mass Transfer Analysis of Air-Cooled Membrane Distillation Configuration for Desalination

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