State-of-the-art in liquid-to-air membrane energy exchangers (LAMEEs): A comprehensive review

Abdel-Salam, Mohamed R.H.; Ge, Gaoming; Fauchoux, Melanie; Besant, Robert W.; Simonson, Carey J.

doi:10.1016/j.rser.2014.07.022

Cited by 84 publications

(20 citation statements)

References 143 publications

(177 reference statements)

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“…(3) Other forces such as friction should be ignored, the amount of gas turbulence is calculated according to the free vortex, and dust particle tangential velocity is equal to gas flow, average values of flow rate; density of gas flow is used, and the pressure lose along the pipe is negligible. The film temperature and pipe wall temperature can be regarded the same [15]. (4) The particle diameter remains constant and is the average value, and the system is adiabatic, i.e., loss of heat to the exterior is insignificant.…”

Section: Integrated Technology and Model Hypothesismentioning

confidence: 99%

Modeling of the Flue Gas Condensation for the PM2.5 Removal Efficiency of a Integrated Technology

Liu

Cheng

2015

Arab J Sci Eng

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A combined pseudo-homogeneous and fractal geometry model was developed to simulate the process of a integrated technology. The technology was proposed to replace heat pipes and WFGD, which is based on the theory that liquid membrane and droplets grow in size by vapor heterogeneous condensation with they acting as nucleation centers and then the grown droplets are removed efficiently by using integrated diverse combinations of condenser pipes and a highly efficient scrubber. The model has been approached useful for both analyzing results and aiding in design of the technology by conducting a twodimensional steady-state model by means of infinitesimal analysis, incorporating with the models of whole fine particles absorption efficiency of a regularly arranged liquid membrane and droplets column group, and the models of geometric classifications for liquid and solid based on the fractal dimension identified by different structural of radius of gyration of liquid-solid interface transition zone. The predicted values were also compared with the experimental results, and they are in excellent agreement. The results showed that: When the fractal dimension d f is 0.3, the calculation result is the most closer to actual experiment parameter. The PM 2.5 diffusion volume flux value V w ranges from 22 and 45 mm/s. List of SymbolsAbbreviations R e Reynolds number of flow gas P r Prandtl number of flow gas S c Schmidt number of water vapor S h Sherwood number F Fanning friction factor K th Thermophoretic coefficient ∇T Temperature gradient of the fluid symbols K th Thermophoresis coefficient C Constant number, C = 0.75, or, C = 0.5 α, γ , p, q Fractal ratio (%) β Blockage, % ε fiber porosity (%) r Circular radius of heat exchange tube (m) W j The width of a single liquid dropletss column (m) r f , The vertical axle line distance of two droplets (m) l Characteristic length of channel (m) d Qualitative dimension size of the channel (m) D f Diameter of PM 2.5 separation of droplets (m) δ Thickness of the temperature boundary layer (m) δ t Vapor concentration boundary layer (m) δ c PM 2.5 concentration boundary layer, respectively (m) δ p Boundary layer thickness of PM 2.5 concentration (m) k Flow gas thermal conductivity [w/(m k)] k w Convective mass transfer coefficient of water vapor (m/s) u Particulate axial velocity (m/s) u j Average air velocity corresponding with W j (m/s) 123 Arab J Sci Eng V w Vapor diffusion volume flux of boundary layer (m/s) V d Particulate migration velocity (m/s) v th Thermophoretic velocity, respectively (m/s) v θ Horizontal direction of gas flow velocity (m/s) v r Perpendicular direction of gas flow velocity (m/s) v d Dust particle velocity (m/s) v p Droplets velocity (m/s) υ g Gas kinematic viscosity (m 2 /s) μ g PM 2.5 dynamic viscosity (m 2 /s) D M Virtual membrane mass transfer coefficient (m 2 /s) D p PM 2.5 diffusion coefficient (m 2 /s) D w Water vapor-air diffusion coefficient, respectively (m 2 /s) n w Water vapor condensation mass flux (kg/(m 2 s)) c p Mass concentration of PM 2.5 compone...

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Section: Integrated Technology and Model Hypothesismentioning

confidence: 99%

Modeling of the Flue Gas Condensation for the PM2.5 Removal Efficiency of a Integrated Technology

Liu

Cheng

2015

Arab J Sci Eng

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“…The total number of transfer units for sensible heat and the overall Lewis number are the most dominant parameters that influence heat and mass transfer. Abdel-Salam et al [32] deal with a comprehensive review of the design and performance of LAMEE as follows:…”

Section: Introductionmentioning

confidence: 99%

Simplified Heat and Mass Transfer Model for Cross-Flow and Countercurrent Flow Packed Bed Tower Dehumidifiers with a Liquid Desiccant System

Shiue

Chiu³

et al. 2016

Sustainability

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A mathematical model is developed using the Matlab/Simulink platform to investigate heat and mass transfer performance of cross-flow and counterflow dehumidifiers with Lithium Chloride (LiCl) solution. In the liquid desiccant dehumidifier, the orthogonal polynomial basis is used to simulate the combined processes of heat and mass transfer. The temperature profiles on cross-flow and countercurrent flow dehumidifiers are demonstrated. The resultant counter flow air changes the temperature profile of the LiCl solution in the longitudinal direction because of the drag forces. In addition, when inlet airflow rate reaches 15 kg·s −1 , the temperature effect becomes less obvious and may be reasonably negligible. Under these conditions, the air changes the design factor and determines the interfacial temperature. It is demonstrated that the mathematical model can be of great value in the design and improvement of cross-flow and countercurrent flow dehumidifiers.

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“…Others such as the reviews from Abdel-Salam [8], Zhang [9] or Chaudhry [10] review the developments related to LAMEE, membrane energy exchangers or heat pipes exclusively. To the knowledge of the authors this is the only paper addressing heat/energy recovery systems for residential blocks in cold climates…”

Section: Introductionmentioning

confidence: 99%

Review of heat/energy recovery exchangers for use in ZEBs in cold climate countries

Alonso

Liu

Mathisen

et al. 2015

Building and Environment

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130

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State-of-the-art in liquid-to-air membrane energy exchangers (LAMEEs): A comprehensive review

Cited by 84 publications

References 143 publications

Modeling of the Flue Gas Condensation for the PM2.5 Removal Efficiency of a Integrated Technology

Modeling of the Flue Gas Condensation for the PM2.5 Removal Efficiency of a Integrated Technology

Simplified Heat and Mass Transfer Model for Cross-Flow and Countercurrent Flow Packed Bed Tower Dehumidifiers with a Liquid Desiccant System

Review of heat/energy recovery exchangers for use in ZEBs in cold climate countries

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