Prof. Dr. Ing. Menwer Attarakih | University of Jordan (original) (raw)

Uploads

Papers by Prof. Dr. Ing. Menwer Attarakih

Research paper thumbnail of Energy and exergy analysis of combined cooling and power system using variable mode adsorption chiller

E3S Web of Conferences, 2021

Adsorption cooling is a promising technology to recover low-temperature waste heat from a diesel ... more Adsorption cooling is a promising technology to recover low-temperature waste heat from a diesel genset. In this paper, an advanced adsorption chiller working in variable mode is proposed for the combined cooling and power cycle (CCP) to recover waste heat from the water jacket in the diesel genset. The chiller works on three modes based on the ambient temperature for better heat utilization. In this study, three modes were investigated: single-stage cycle mode, short-duration, and medium-duration mass recovery modes. The results show that the energy and exergy efficiency for a single-stage cycle mode is higher at an ambient temperature lower than 35 °C . In comparison, the mass recovery mode has a higher energy and exergy efficiency at an ambient temperature higher than 35 °C. The annual energy and exergy efficiency for the CCP was investigated when the chiller works with variable modes based on the ambient temperature under DUBAI weather conditions as a case study. The results sho...

Research paper thumbnail of Performance Analysis of Variable Mode Adsorption Chiller at Different Recooling Water Temperatures

Energies, 2021

Adsorption cooling can recover waste heat at low temperature levels, thereby saving energy and re... more Adsorption cooling can recover waste heat at low temperature levels, thereby saving energy and reducing greenhouse gas emissions. An air-cooled adsorption cooling system reduces water consumption and the technical problems associated with wet-cooling systems; however, it is difficult to maintain a constant recooling water temperature using such a system. To overcome this limitation, a variable mode adsorption chiller concept was introduced and investigated in this study. A prototype adsorption chiller was designed and tested experimentally and numerically using the lumped model. Experimental and numerical results showed good agreement and a similar trend. The adsorbent pairs investigated in this chiller consisted of silicoaluminophosphate (SAPO-34)/water. The experimental isotherm data were fitted to the Dubinin–Astakhov (D–A), Freundlich, Hill, and Sun and Chakraborty (S–C) models. The fitted data exhibited satisfactory agreement with the experimental data except with the Freundlic...

Research paper thumbnail of Energy and Exergy Analyses of Adsorption Chiller at Various Recooling-Water and Dead-State Temperatures

Energies, 2021

We conducted energy and exergy analyses of an adsorption chiller to investigate the effect of rec... more We conducted energy and exergy analyses of an adsorption chiller to investigate the effect of recooling-water temperatures on the cooling capacity and Coefficient of Performance (COP) with variable cycle modes. We investigated both the effect of the recooling-water temperature and the dead state temperature on the exergy destruction in the chiller components. Our results show that there is an optimum reheat cycle mode for each recooling-water temperature range. For the basic single stage cycle, the exergy destruction is mainly accrued in the desorber (49%), followed by the adsorber (27%), evaporator (13%), condenser (9%), and expansion valve (2%). The exergy destruction for the preheating process is approximately 35% of the total exergy destruction in the desorber. By contrast, the precooling process is almost 58% of the total exergy destruction in the adsorber. The exergy destruction decreases when increasing the recooling-water and the dead state temperatures, while the exergy eff...

Research paper thumbnail of The Normalized Quadrature Method of Moments Coupled with Finite Pointset Method

Research paper thumbnail of The bivariate spatially distributed population balance equation: An accurate reduction technique

Computer Aided Chemical Engineering, 2005

Research paper thumbnail of Coupling of the CFD and the Droplet Population Balance Equation with the Finite Pointset Method

Lecture Notes in Computational Science and Engineering

Research paper thumbnail of CFD-population balance modeling and simulation of coupled hydrodynamics and mass transfer in liquid extraction columns

Applied Mathematical Modelling, 2015

ABSTRACT Abstract A hierarchical approach for modelling and simulation of coupled hydrodynamics a... more ABSTRACT Abstract A hierarchical approach for modelling and simulation of coupled hydrodynamics and mass transfer in liquid extraction columns using detailed and reduced bivariate population balance models is presented. The hierarchical concept utilizes a one-dimensional CFD model with detailed bivariate population balances. This population balance model is implemented in the PPBLAB software, which is used to optimize the column hydrodynamics. The optimized droplet model parameters (droplet breakage and coalescence) are then used by a two-dimensional CFD reduced population balance model. As a reduced bivariate population balance model, OPOSPM (One Primary and One Secondary Particle Method) is implemented in the commercial FLUENT software to predict the coupled hydrodynamics and mass transfer of an RDC extraction column with 88 compartments. The simulation results show that the coupled two-dimensional-OPOSPM model produces results that are very close to that of the one-dimensional PPBLAB detailed population balance model. The advantages of PPBLAB are the ease of model setup, implementation and the reduced simulation time (order of minutes), when compared to the computational time (order of weeks) and computational resources using FLUENT software. The advantages of the two-dimensional CFD model is the direct estimation of the turbulent energy dissipation using the k-ε model and the local resolution of continuous phase back mixing.

Research paper thumbnail of A CFD-Population Balance Model for the Simulation of Kühni Extraction Column

Computer Aided Chemical Engineering, 2011

In this work, computational fluid dynamics (CFD) calculations coupled with DPBM are compared to L... more In this work, computational fluid dynamics (CFD) calculations coupled with DPBM are compared to LLECMOD (Liquid-Liquid Extraction Column MODule) simulations and to Laser Induced Fluorescence (LIF) measurement of the phase fraction using an iso-optical system of calcium chloride/water and butyl acetate. The results show a good agreement between the simulations and experimental data. The CFD requires a high computational load

Research paper thumbnail of Detailed Mathematical Modelling of Liquid-Liquid Extraction Columns

Computer Aided Chemical Engineering, 2011

Research paper thumbnail of PPBLAB: A New Multivariate Population Balance Environment for Particulate System Modelling and Simulation

Procedia Engineering, 2012

Research paper thumbnail of Synthesis and Control Analysis of Gas Absorption Column using MATALB and SIMULINK

Procedia Engineering, 2012

Research paper thumbnail of An Inverse Problem Method for RDC Simulation

Research paper thumbnail of One-Group Reduced Population Balance Model for CFD Simulation of a Pilot-Plant Extraction Column

Industrial & Engineering Chemistry Research, 2010

Research paper thumbnail of Tropfenschwarmanalytik mittels Bildverarbeitung zur Simulation von Extraktionskolonnen mit Populationsbilanzen

Chemie Ingenieur Technik, 2011

Research paper thumbnail of Numerical solution of the spatially distributed population balance equation describing the hydrodynamics of interacting liquid–liquid dispersions

Chemical Engineering Science, 2004

Research paper thumbnail of Optimal moving and fixed grids for the solution of discretized population balances in batch and continuous systems: droplet breakage

Chemical Engineering Science, 2003

Research paper thumbnail of Mathematical modeling of high-pressure oil-splitting reactor using a reduced population balance model

Chemical Engineering Science, 2012

Research paper thumbnail of Coupling of CFD with DPBM for an RDC extractor

Chemical Engineering Science, 2009

For the design of counter-current liquid–liquid extraction columns, there is a strong industrial ... more For the design of counter-current liquid–liquid extraction columns, there is a strong industrial demand for more straightforward, faster and money-saving simulation methods. One possibility in this direction that has a great potential is the coupling of computational fluid dynamics (CFD) with population balance models (PBM). Therefore, a combination of CFD and droplet population balance modelling (DPBM) is applied to simulate

Research paper thumbnail of Modeling and dynamic analysis of a rotating disc contactor (RDC) extraction column using one primary and one secondary particle method (OPOSPM)

Chemical Engineering Science, 2013

ABSTRACT Modeling and dynamic analysis of liquid extraction columns are essential for the design,... more ABSTRACT Modeling and dynamic analysis of liquid extraction columns are essential for the design, control strategies and understanding of column behavior during start up and shutdown. Because of the discrete character of the dispersed phase, the population balance modeling framework is needed. Due to the mathematical complexity of the full population balance model, it is still not feasible for dynamic and online control purposes. In this work, a reduced mathematical model is developed by applying the concept of the primary and secondary particle method (Attarakih et al., 2009b, Solution of the population balance equation using the one primary and one secondary particle method (OPOSPM), Computer Aided Chemical Engineering, vol. 26, pp. 1333–1338). The method is extended to solve the nonhomogenous bivariate population balance equation, which describes the coupled hydrodynamics and mass transfer in an RDC extraction column. The model uses only one primary and one secondary particles, which can be considered as Lagrangian fluid particles carrying information about the distribution as it evolves in space and time. This information includes averaged quantities such as total number, volume and solute concentrations, which are tracked directly through a system of coupled hyperbolic conservation laws with nonlinear source terms. The model describes droplet breakage, coalescence and interphase solute transfer. Rigorous hyperbolic analysis of OPOSPM uncovered the existence of four waves traveling along the column height. Three of these are contact waves, which carry volume and solute concentration information. The dynamic analysis in this paper reveals that the dominant time constant is due to solute concentration in the continuous phase. On the other hand, the response of the dispersed phase mean properties is relatively faster than the solute concentration in the continuous phase. Special shock capturing method based on the upwind scheme with flux vector splitting is used, with explicit wave speeds, as a time–space solver. The model shows a good match between analytical and numerical results for special steady state and dynamic cases as well as the published steady state experimental data.

Research paper thumbnail of Numerical solution of the bivariate population balance equation for the interacting hydrodynamics and mass transfer in liquid–liquid extraction columns

Chemical Engineering Science, 2006

Research paper thumbnail of Energy and exergy analysis of combined cooling and power system using variable mode adsorption chiller

E3S Web of Conferences, 2021

Adsorption cooling is a promising technology to recover low-temperature waste heat from a diesel ... more Adsorption cooling is a promising technology to recover low-temperature waste heat from a diesel genset. In this paper, an advanced adsorption chiller working in variable mode is proposed for the combined cooling and power cycle (CCP) to recover waste heat from the water jacket in the diesel genset. The chiller works on three modes based on the ambient temperature for better heat utilization. In this study, three modes were investigated: single-stage cycle mode, short-duration, and medium-duration mass recovery modes. The results show that the energy and exergy efficiency for a single-stage cycle mode is higher at an ambient temperature lower than 35 °C . In comparison, the mass recovery mode has a higher energy and exergy efficiency at an ambient temperature higher than 35 °C. The annual energy and exergy efficiency for the CCP was investigated when the chiller works with variable modes based on the ambient temperature under DUBAI weather conditions as a case study. The results sho...

Research paper thumbnail of Performance Analysis of Variable Mode Adsorption Chiller at Different Recooling Water Temperatures

Energies, 2021

Adsorption cooling can recover waste heat at low temperature levels, thereby saving energy and re... more Adsorption cooling can recover waste heat at low temperature levels, thereby saving energy and reducing greenhouse gas emissions. An air-cooled adsorption cooling system reduces water consumption and the technical problems associated with wet-cooling systems; however, it is difficult to maintain a constant recooling water temperature using such a system. To overcome this limitation, a variable mode adsorption chiller concept was introduced and investigated in this study. A prototype adsorption chiller was designed and tested experimentally and numerically using the lumped model. Experimental and numerical results showed good agreement and a similar trend. The adsorbent pairs investigated in this chiller consisted of silicoaluminophosphate (SAPO-34)/water. The experimental isotherm data were fitted to the Dubinin–Astakhov (D–A), Freundlich, Hill, and Sun and Chakraborty (S–C) models. The fitted data exhibited satisfactory agreement with the experimental data except with the Freundlic...

Research paper thumbnail of Energy and Exergy Analyses of Adsorption Chiller at Various Recooling-Water and Dead-State Temperatures

Energies, 2021

We conducted energy and exergy analyses of an adsorption chiller to investigate the effect of rec... more We conducted energy and exergy analyses of an adsorption chiller to investigate the effect of recooling-water temperatures on the cooling capacity and Coefficient of Performance (COP) with variable cycle modes. We investigated both the effect of the recooling-water temperature and the dead state temperature on the exergy destruction in the chiller components. Our results show that there is an optimum reheat cycle mode for each recooling-water temperature range. For the basic single stage cycle, the exergy destruction is mainly accrued in the desorber (49%), followed by the adsorber (27%), evaporator (13%), condenser (9%), and expansion valve (2%). The exergy destruction for the preheating process is approximately 35% of the total exergy destruction in the desorber. By contrast, the precooling process is almost 58% of the total exergy destruction in the adsorber. The exergy destruction decreases when increasing the recooling-water and the dead state temperatures, while the exergy eff...

Research paper thumbnail of The Normalized Quadrature Method of Moments Coupled with Finite Pointset Method

Research paper thumbnail of The bivariate spatially distributed population balance equation: An accurate reduction technique

Computer Aided Chemical Engineering, 2005

Research paper thumbnail of Coupling of the CFD and the Droplet Population Balance Equation with the Finite Pointset Method

Lecture Notes in Computational Science and Engineering

Research paper thumbnail of CFD-population balance modeling and simulation of coupled hydrodynamics and mass transfer in liquid extraction columns

Applied Mathematical Modelling, 2015

ABSTRACT Abstract A hierarchical approach for modelling and simulation of coupled hydrodynamics a... more ABSTRACT Abstract A hierarchical approach for modelling and simulation of coupled hydrodynamics and mass transfer in liquid extraction columns using detailed and reduced bivariate population balance models is presented. The hierarchical concept utilizes a one-dimensional CFD model with detailed bivariate population balances. This population balance model is implemented in the PPBLAB software, which is used to optimize the column hydrodynamics. The optimized droplet model parameters (droplet breakage and coalescence) are then used by a two-dimensional CFD reduced population balance model. As a reduced bivariate population balance model, OPOSPM (One Primary and One Secondary Particle Method) is implemented in the commercial FLUENT software to predict the coupled hydrodynamics and mass transfer of an RDC extraction column with 88 compartments. The simulation results show that the coupled two-dimensional-OPOSPM model produces results that are very close to that of the one-dimensional PPBLAB detailed population balance model. The advantages of PPBLAB are the ease of model setup, implementation and the reduced simulation time (order of minutes), when compared to the computational time (order of weeks) and computational resources using FLUENT software. The advantages of the two-dimensional CFD model is the direct estimation of the turbulent energy dissipation using the k-ε model and the local resolution of continuous phase back mixing.

Research paper thumbnail of A CFD-Population Balance Model for the Simulation of Kühni Extraction Column

Computer Aided Chemical Engineering, 2011

In this work, computational fluid dynamics (CFD) calculations coupled with DPBM are compared to L... more In this work, computational fluid dynamics (CFD) calculations coupled with DPBM are compared to LLECMOD (Liquid-Liquid Extraction Column MODule) simulations and to Laser Induced Fluorescence (LIF) measurement of the phase fraction using an iso-optical system of calcium chloride/water and butyl acetate. The results show a good agreement between the simulations and experimental data. The CFD requires a high computational load

Research paper thumbnail of Detailed Mathematical Modelling of Liquid-Liquid Extraction Columns

Computer Aided Chemical Engineering, 2011

Research paper thumbnail of PPBLAB: A New Multivariate Population Balance Environment for Particulate System Modelling and Simulation

Procedia Engineering, 2012

Research paper thumbnail of Synthesis and Control Analysis of Gas Absorption Column using MATALB and SIMULINK

Procedia Engineering, 2012

Research paper thumbnail of An Inverse Problem Method for RDC Simulation

Research paper thumbnail of One-Group Reduced Population Balance Model for CFD Simulation of a Pilot-Plant Extraction Column

Industrial & Engineering Chemistry Research, 2010

Research paper thumbnail of Tropfenschwarmanalytik mittels Bildverarbeitung zur Simulation von Extraktionskolonnen mit Populationsbilanzen

Chemie Ingenieur Technik, 2011

Research paper thumbnail of Numerical solution of the spatially distributed population balance equation describing the hydrodynamics of interacting liquid–liquid dispersions

Chemical Engineering Science, 2004

Research paper thumbnail of Optimal moving and fixed grids for the solution of discretized population balances in batch and continuous systems: droplet breakage

Chemical Engineering Science, 2003

Research paper thumbnail of Mathematical modeling of high-pressure oil-splitting reactor using a reduced population balance model

Chemical Engineering Science, 2012

Research paper thumbnail of Coupling of CFD with DPBM for an RDC extractor

Chemical Engineering Science, 2009

For the design of counter-current liquid–liquid extraction columns, there is a strong industrial ... more For the design of counter-current liquid–liquid extraction columns, there is a strong industrial demand for more straightforward, faster and money-saving simulation methods. One possibility in this direction that has a great potential is the coupling of computational fluid dynamics (CFD) with population balance models (PBM). Therefore, a combination of CFD and droplet population balance modelling (DPBM) is applied to simulate

Research paper thumbnail of Modeling and dynamic analysis of a rotating disc contactor (RDC) extraction column using one primary and one secondary particle method (OPOSPM)

Chemical Engineering Science, 2013

ABSTRACT Modeling and dynamic analysis of liquid extraction columns are essential for the design,... more ABSTRACT Modeling and dynamic analysis of liquid extraction columns are essential for the design, control strategies and understanding of column behavior during start up and shutdown. Because of the discrete character of the dispersed phase, the population balance modeling framework is needed. Due to the mathematical complexity of the full population balance model, it is still not feasible for dynamic and online control purposes. In this work, a reduced mathematical model is developed by applying the concept of the primary and secondary particle method (Attarakih et al., 2009b, Solution of the population balance equation using the one primary and one secondary particle method (OPOSPM), Computer Aided Chemical Engineering, vol. 26, pp. 1333–1338). The method is extended to solve the nonhomogenous bivariate population balance equation, which describes the coupled hydrodynamics and mass transfer in an RDC extraction column. The model uses only one primary and one secondary particles, which can be considered as Lagrangian fluid particles carrying information about the distribution as it evolves in space and time. This information includes averaged quantities such as total number, volume and solute concentrations, which are tracked directly through a system of coupled hyperbolic conservation laws with nonlinear source terms. The model describes droplet breakage, coalescence and interphase solute transfer. Rigorous hyperbolic analysis of OPOSPM uncovered the existence of four waves traveling along the column height. Three of these are contact waves, which carry volume and solute concentration information. The dynamic analysis in this paper reveals that the dominant time constant is due to solute concentration in the continuous phase. On the other hand, the response of the dispersed phase mean properties is relatively faster than the solute concentration in the continuous phase. Special shock capturing method based on the upwind scheme with flux vector splitting is used, with explicit wave speeds, as a time–space solver. The model shows a good match between analytical and numerical results for special steady state and dynamic cases as well as the published steady state experimental data.

Research paper thumbnail of Numerical solution of the bivariate population balance equation for the interacting hydrodynamics and mass transfer in liquid–liquid extraction columns

Chemical Engineering Science, 2006

Research paper thumbnail of Lab4

First Term 2014/2015 Mid Exam, Short & Full Reports Mean: 33.00 STD: 6.00 Number of Students... more First Term 2014/2015
Mid Exam, Short & Full Reports
Mean: 33.00
STD: 6.00
Number of Students: 23

Research paper thumbnail of Plant Design

First Term 2014/2015 Mid Exams, Project & Presentation Mean: 27.16 STD: 6.10 Number of Stud... more First Term 2014/2015
Mid Exams, Project & Presentation
Mean: 27.16
STD: 6.10
Number of Students: 25

Research paper thumbnail of Process design

First Term 2014/2015 Mid Exams, Project & Presentation Mean: 25.58 STD: 7.70 Number of Stude... more First Term 2014/2015
Mid Exams, Project & Presentation
Mean: 25.58
STD: 7.70
Number of Students: 50