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Artur Pożarlik
Department of Thermal and Fluid Engineering, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands

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Journal article
Published: 13 August 2021 in Energies
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This research presents 3D steady-state simulations of a skim milk spray drying process in a counter-current configuration dryer. A two-phase flow involving gas and discrete phase is modeled using the Eulerian–Lagrangian model with two-way coupling between phases. The drying kinetics of skim milk is incorporated using the Reaction Engineering Approach. The model predictions are found to be in accordance with the experimental temperature measurements with a maximum average error of 5%. The validated computational model is employed further to study the effects of nozzle position, initial spray Sauter Mean Diameter (SMD), air inlet temperature, and feed rate on the temperature and moisture profiles, particle impact positions, drying histories, and product recovery at the outlet. The location of the nozzle upwards (≈23 cm) resulted in maximum product recovery and increased the mean particle residence time at the outlet. A similar trend was observed for the highest feed rate of 26 kg/h owing to the increased spray penetration upstream in the chamber. The maximum evaporation zone was detected close to the atomizer (0–10 cm) when the spray SMD is 38 µm, whereas it shifts upstream (40–50 cm) of the dryer for an SMD of 58 µm. The high air inlet temperature resulted in enhanced evaporation rates only in the initial 10–20 cm distance from the atomizer. The results obtained in this study are beneficial for the development of the novel vortex chamber-based reactors with a counter flow mechanism.

ACS Style

Umair Jamil Ur Rahman; Artur K. Pozarlik. Numerical Study and Experimental Validation of Skim Milk Drying in a Process Intensified Counter Flow Spray Dryer. Energies 2021, 14, 4974 .

AMA Style

Umair Jamil Ur Rahman, Artur K. Pozarlik. Numerical Study and Experimental Validation of Skim Milk Drying in a Process Intensified Counter Flow Spray Dryer. Energies. 2021; 14 (16):4974.

Chicago/Turabian Style

Umair Jamil Ur Rahman; Artur K. Pozarlik. 2021. "Numerical Study and Experimental Validation of Skim Milk Drying in a Process Intensified Counter Flow Spray Dryer." Energies 14, no. 16: 4974.

Journal article
Published: 05 August 2021 in Energies
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New regulations aimed at curbing the problem of eutrophication introduce limitations for traditional ways to use the by-product of anaerobic digestion—the digestate. Hydrothermal carbonisation (HTC) can be a viable way to valorise the digestate in an energy-efficient manner and at the same time maximise the synergy in terms of recovery of water, nutrients, followed by more efficient use of the remaining carbon. Additionally, hydrothermal treatment is a feasible way to recirculate recalcitrant process residues. Recirculation to anaerobic digestion enables recovery of a significant part of chemical energy lost in HTC by organics dissolved in the liquid effluent. Recirculating back to the HTC process can enhance nutrient recovery by making process water more acidic. However, such an effect of synergy can be exploited to its full extent only when viable separation techniques are applied to separate organic by-products of HTC and water. The results presented in this study show that using cascade membrane systems (microfiltration (MF) → ultrafiltration (UF) → nanofiltration (NF)), using polymeric membranes, can facilitate such separation. The best results were obtained by conducting sequential treatment of the liquid by-product of HTC in the following membrane sequence: MF 0.2 µm → UF PES 10 → NF NPO30P, which allowed reaching COD removal efficiency of almost 60%.

ACS Style

Agnieszka Urbanowska; Małgorzata Kabsch-Korbutowicz; Christian Aragon-Briceño; Mateusz Wnukowski; Artur Pożarlik; Lukasz Niedzwiecki; Marcin Baranowski; Michał Czerep; Przemysław Seruga; Halina Pawlak-Kruczek; Eduard Bramer; Gerrit Brem. Cascade Membrane System for Separation of Water and Organics from Liquid By-Products of HTC of the Agricultural Digestate—Evaluation of Performance. Energies 2021, 14, 4752 .

AMA Style

Agnieszka Urbanowska, Małgorzata Kabsch-Korbutowicz, Christian Aragon-Briceño, Mateusz Wnukowski, Artur Pożarlik, Lukasz Niedzwiecki, Marcin Baranowski, Michał Czerep, Przemysław Seruga, Halina Pawlak-Kruczek, Eduard Bramer, Gerrit Brem. Cascade Membrane System for Separation of Water and Organics from Liquid By-Products of HTC of the Agricultural Digestate—Evaluation of Performance. Energies. 2021; 14 (16):4752.

Chicago/Turabian Style

Agnieszka Urbanowska; Małgorzata Kabsch-Korbutowicz; Christian Aragon-Briceño; Mateusz Wnukowski; Artur Pożarlik; Lukasz Niedzwiecki; Marcin Baranowski; Michał Czerep; Przemysław Seruga; Halina Pawlak-Kruczek; Eduard Bramer; Gerrit Brem. 2021. "Cascade Membrane System for Separation of Water and Organics from Liquid By-Products of HTC of the Agricultural Digestate—Evaluation of Performance." Energies 14, no. 16: 4752.

Journal article
Published: 19 April 2021 in Journal of Electrostatics
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A novel method for estimating droplet charge in numerical simulations of conductively and inductively charged sprays is presented. This method is based on balancing the effective electric field at the sprayer nozzle with the global electric field induced by the charged droplets. The global approach avoids the need for computationally expensive local resolution of the spray formation region, allowing it to be used in Eulerian–Lagrangian simulations of high-flowrate sprays. The method is validated against experimental data from literature, proving it can predict droplet charge with reasonable engineering accuracy, over a wide range of spray parameters, for conductive spray liquids.

ACS Style

Antoni Brentjes; Artur K. Pozarlik; Gerrit Brem. Estimating droplet charge in numerical simulations of charged sprays. Journal of Electrostatics 2021, 112, 103591 .

AMA Style

Antoni Brentjes, Artur K. Pozarlik, Gerrit Brem. Estimating droplet charge in numerical simulations of charged sprays. Journal of Electrostatics. 2021; 112 ():103591.

Chicago/Turabian Style

Antoni Brentjes; Artur K. Pozarlik; Gerrit Brem. 2021. "Estimating droplet charge in numerical simulations of charged sprays." Journal of Electrostatics 112, no. : 103591.

Journal article
Published: 24 February 2021 in Energies
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In this paper, an intensified spray-drying process in a novel Radial Multizone Dryer (RMD) is analyzed by means of CFD. A three-dimensional Eulerian–Lagrangian multiphase model is applied to investigate the effect of solids outlet location, relative hot/cold airflow ratio, and droplet size on heat and mass transfer characteristics, G-acceleration, residence time, and separation efficiency of the product. The results indicate that the temperature pattern in the dryer is dependent on the solids outlet location. A stable, symmetric spray behavior with maximum evaporation in the hot zone is observed when the solids outlet is placed at the periphery of the vortex chamber. The maximum product separation efficiency (85 wt %) is obtained by applying high G-acceleration (at relative hot/cold ratio of 0.75) and narrow droplet size distribution (45–70 µm). The separation of different sized particles with distinct drying times is also observed. Smaller particles (<32 µm) leave the reactor via the gas outlet, while the majority of big particles leave it via the solids outlet, thus depicting in situ particle separation. The results revealed the feasibility and benefits of a multizone drying operation and that the RMD can be an attractive solution for spray drying technology.

ACS Style

Umair Jamil Ur Rahman; Artur Krzysztof Pozarlik; Thomas Tourneur; Axel de Broqueville; Juray De Wilde; Gerrit Brem. Numerical Study toward Optimization of Spray Drying in a Novel Radial Multizone Dryer. Energies 2021, 14, 1233 .

AMA Style

Umair Jamil Ur Rahman, Artur Krzysztof Pozarlik, Thomas Tourneur, Axel de Broqueville, Juray De Wilde, Gerrit Brem. Numerical Study toward Optimization of Spray Drying in a Novel Radial Multizone Dryer. Energies. 2021; 14 (5):1233.

Chicago/Turabian Style

Umair Jamil Ur Rahman; Artur Krzysztof Pozarlik; Thomas Tourneur; Axel de Broqueville; Juray De Wilde; Gerrit Brem. 2021. "Numerical Study toward Optimization of Spray Drying in a Novel Radial Multizone Dryer." Energies 14, no. 5: 1233.

Design innovation paper
Published: 28 February 2020 in Journal of Energy Resources Technology
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Currently, the reclamation and reuse of water have not reached their full potential, although more energy is needed to obtain and transport freshwater and this solution has a more serious environmental impact. Agricultural irrigation is, by far, the largest application of reclaimed water worldwide, so the proposed concept may result in the production of water that can be used, among others, for crop irrigation. This paper describes a novel installation for the recovery of the agricultural water from the digestate, along with the results of initial experiments. Currently, water is wasted, due to evaporation, in anaerobic digestion plants, as the effluent from dewatering of the digestate is discharged into lagoons. Moreover, water that stays within the interstitial space of the digestate is lost in a similar fashion. With increasing scarcity of water in rural areas, such waste should not be neglected. The study indicates that hydrothermal carbonization (HTC) enhances mechanical dewatering of the agricultural digestate and approximately 900 L of water can be recovered from one ton. Dewatered hydrochars had a lower heating value of almost 10 MJ/kg, indicating the possibility of using it as a fuel for the process. The aim of this Design Innovation Paper is to outline the newly developed concept of an installation that could enable recovery of water from, so far, the neglected resource—i.e., digestate from anaerobic digestion plants.

ACS Style

Halina Pawlak-Kruczek; Agnieszka Urbanowska; Weihong Yang; Gerrit Brem; Aneta Magdziarz; Przemyslaw Seruga; Lukasz Niedzwiecki; Artur Pozarlik; Agata Mlonka-Mędrala; Małgorzata Kabsch-Korbutowicz; Eduard A. Bramer; Marcin Baranowski; Małgorzata Sieradzka; Monika Tkaczuk-Serafin. Industrial Process Description for the Recovery of Agricultural Water From Digestate. Journal of Energy Resources Technology 2020, 142, 1 -33.

AMA Style

Halina Pawlak-Kruczek, Agnieszka Urbanowska, Weihong Yang, Gerrit Brem, Aneta Magdziarz, Przemyslaw Seruga, Lukasz Niedzwiecki, Artur Pozarlik, Agata Mlonka-Mędrala, Małgorzata Kabsch-Korbutowicz, Eduard A. Bramer, Marcin Baranowski, Małgorzata Sieradzka, Monika Tkaczuk-Serafin. Industrial Process Description for the Recovery of Agricultural Water From Digestate. Journal of Energy Resources Technology. 2020; 142 (7):1-33.

Chicago/Turabian Style

Halina Pawlak-Kruczek; Agnieszka Urbanowska; Weihong Yang; Gerrit Brem; Aneta Magdziarz; Przemyslaw Seruga; Lukasz Niedzwiecki; Artur Pozarlik; Agata Mlonka-Mędrala; Małgorzata Kabsch-Korbutowicz; Eduard A. Bramer; Marcin Baranowski; Małgorzata Sieradzka; Monika Tkaczuk-Serafin. 2020. "Industrial Process Description for the Recovery of Agricultural Water From Digestate." Journal of Energy Resources Technology 142, no. 7: 1-33.

Journal article
Published: 15 January 2019 in Energy Conversion and Management
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Within the scope of the energy transition an increasing share of intermittent renewable energy sources demand for grid balancing energy storage technologies, for which a novel zero-emission methanol based energy storage system is introduced. The objective is to establish the feasibility of this system as a grid balancing energy storage method, based on thermal efficiency and cost, at an input power of 50 MWel and boundary conditions that are set to reflect geographically independent operation. The main components are determined to be a PEM electrolyser followed by a recirculating catalytic synthesis reactor for methanol production. Alternatives for power generation are a transcritical carbon dioxide gas turbine (tCO2-GT), a supercritical carbon dioxide gas turbine (sCO2-GT) and a combination of methanol steam reforming and PEM fuel cell (MSR-PEMFC). Modelling of the entire system with respectively tCO2-GT, sCO2-GT and MSR-PEMFC for power generation leads to a system energy efficiency of 30.1%, 26.5% and 24.1%. Levelised cost of storage is estimated to be respectively 0.24 $/kWh, 0.25 $/kWh and 0.34 $/kWh based on equipment cost estimations and factorial estimates, provisionally not taking into account the variable operational costs due to the extent of uncertainty in specifically catalyst type and degradation. Hence, based on these results the most efficient and cost effective system configuration is the tCO2-GT which can be competitive with hydrogen seasonal energy storage systems. sCO2-GT thermodynamic efficiency can be improved if cost effective solutions are found for temperature constraints. Furthermore, detailed elaboration of individual components and grid modelling of the system should lead to more accurate results and possibly increased thermodynamic performance. Concluding, when further elaborated the proposed system could be a practical solution to seasonal energy storage.

ACS Style

J.A. Baak; A.K. Pozarlik; M.J. Arentsen; G. Brem. Techno-economic study of a zero-emission methanol based energy storage system. Energy Conversion and Management 2019, 182, 530 -545.

AMA Style

J.A. Baak, A.K. Pozarlik, M.J. Arentsen, G. Brem. Techno-economic study of a zero-emission methanol based energy storage system. Energy Conversion and Management. 2019; 182 ():530-545.

Chicago/Turabian Style

J.A. Baak; A.K. Pozarlik; M.J. Arentsen; G. Brem. 2019. "Techno-economic study of a zero-emission methanol based energy storage system." Energy Conversion and Management 182, no. : 530-545.

Journal article
Published: 21 March 2014 in Journal of Engineering for Gas Turbines and Power
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Prediction of mutual interaction between flow, combustion, acoustic, and vibration phenomena occurring in a combustion chamber is crucial for the reliable operation of any combustion device. In this paper, this is studied with application to the combustion chamber of a gas turbine. Very dangerous for the integrity of a gas turbine structure can be the coupling between unsteady heat release by the flame, acoustic wave propagation, and liner vibrations. This can lead to a closed-loop feedback system resulting in mechanical failure of the combustor liner due to fatigue and fatal damage to the turbine. Experimental and numerical investigations of the process are performed on a pressurized laboratory-scale combustor. To take into account interaction between reacting flow, acoustics, and vibrations of a liner, the computational fluid dynamics (CFD) and computational structural dynamics (CSD) calculations are combined into one calculation process using a partitioning technique. Computed pressure fluctuations inside the combustion chamber and associated liner vibrations are validated with experiments performed at the state-of-the-art pressurized combustion setup. Three liner structures with different thicknesses are studied. The numerical results agree well with the experimental data. The research shows that the combustion instabilities can be amplified by vibrating walls. The modeling approach discussed in this paper allows to decrease the risk of the gas turbine failure by prediction, for given operating conditions, of the hazardous frequency at which the thermoacoustic instabilities appear.

ACS Style

A. K. Pozarlik; J. B. W. Kok. Fluid-Structure Interaction in Combustion System of a Gas Turbine—Effect of Liner Vibrations. Journal of Engineering for Gas Turbines and Power 2014, 136, 091502 .

AMA Style

A. K. Pozarlik, J. B. W. Kok. Fluid-Structure Interaction in Combustion System of a Gas Turbine—Effect of Liner Vibrations. Journal of Engineering for Gas Turbines and Power. 2014; 136 (9):091502.

Chicago/Turabian Style

A. K. Pozarlik; J. B. W. Kok. 2014. "Fluid-Structure Interaction in Combustion System of a Gas Turbine—Effect of Liner Vibrations." Journal of Engineering for Gas Turbines and Power 136, no. 9: 091502.

Journal article
Published: 12 October 2012 in Journal of Thermal Science and Engineering Applications
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An accurate prediction of the flow and the thermal boundary layer is required to properly simulate gas to wall heat transfer in a turbulent flow. This is studied with a view to application to gas turbine combustors. A typical gas turbine combustion chamber flow presents similarities with the well-studied case of turbulent flow over a backward facing step, especially in the near-wall regions where the heat transfer phenomena take place. However, the combustion flow in a gas turbine engine is often of a dynamic nature and enclosed by a vibrating liner. Therefore apart from steady state situations, cases with an oscillatory inlet flow and vibrating walls are investigated. Results of steady state and transient calculations for the flow field, friction coefficient, and heat transfer coefficient, with the use of various turbulence models, are compared with literature data. It has been observed that the variations in the excitation frequency of the inlet flow and wall vibrations have an influence on the instantaneous heat transfer coefficient profile. However, significant effect on the time mean value and position of the heat transfer peak is only visible for the inlet velocity profile fluctuations with frequency approximately equal to the turbulence bursting frequency.

ACS Style

Artur Krzysztof Pozarlik; Jacobus B.W. Kok. Numerical Simulation of a Turbulent Flow Over a Backward Facing Step With Heated Wall: Effect of Pulsating Velocity and Oscillating Wall. Journal of Thermal Science and Engineering Applications 2012, 4, 041005 .

AMA Style

Artur Krzysztof Pozarlik, Jacobus B.W. Kok. Numerical Simulation of a Turbulent Flow Over a Backward Facing Step With Heated Wall: Effect of Pulsating Velocity and Oscillating Wall. Journal of Thermal Science and Engineering Applications. 2012; 4 (4):041005.

Chicago/Turabian Style

Artur Krzysztof Pozarlik; Jacobus B.W. Kok. 2012. "Numerical Simulation of a Turbulent Flow Over a Backward Facing Step With Heated Wall: Effect of Pulsating Velocity and Oscillating Wall." Journal of Thermal Science and Engineering Applications 4, no. 4: 041005.

Dissertation
Published: 08 November 2010 in Vibro-accoustical instabilities induced by combustion dynamics in gas turbine combustors
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ACS Style

Artur Krzysztof Pozarlik. Vibro-accoustical instabilities induced by combustion dynamics in gas turbine combustors. Vibro-accoustical instabilities induced by combustion dynamics in gas turbine combustors 2010, 1 .

AMA Style

Artur Krzysztof Pozarlik. Vibro-accoustical instabilities induced by combustion dynamics in gas turbine combustors. Vibro-accoustical instabilities induced by combustion dynamics in gas turbine combustors. 2010; ():1.

Chicago/Turabian Style

Artur Krzysztof Pozarlik. 2010. "Vibro-accoustical instabilities induced by combustion dynamics in gas turbine combustors." Vibro-accoustical instabilities induced by combustion dynamics in gas turbine combustors , no. : 1.

Text
Published: 01 May 2008 in The Journal of the Acoustical Society of America
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The turbulent flame in the lean combustion regime in a gas turbine combustor generates significant thermo‐acoustic instabilities. The flame can amplify fluctuations in the released heat, and thus in the acoustic field as well. The induced pressure oscillations will drive vibrations of the combustor walls and burner parts. Stronger fluctuating pressure results in stronger fluctuations in the wall structure. Due to fatigue the remaining life time of the hard ware will be reduced significantly. This paper investigates modeling of acoustic oscillations and mechanical vibrations induced by lean premixed natural gascombustion. The mutual interaction of the combustion processes, induced oscillating pressure field in the combustion chamber, and induced vibration of the liner walls are investigated with numerical techniques. A partitioned procedure is used here: CFX‐10 for the CFD analysis and Ansys‐10 for the CSD analysis are coupled to give insight into a correlation between acoustic pressure oscillations and liner vibrations. These results will be compared with the available experimental data. The data are gathered in a purpose built 500 kW/5 bar premixed natural gas test rig.

ACS Style

Artur Pozarlik; Jim B. Kok. Numerical prediction of interaction between combustion, acoustics and vibration in gas turbines. The Journal of the Acoustical Society of America 2008, 123, 3404 -3404.

AMA Style

Artur Pozarlik, Jim B. Kok. Numerical prediction of interaction between combustion, acoustics and vibration in gas turbines. The Journal of the Acoustical Society of America. 2008; 123 (5):3404-3404.

Chicago/Turabian Style

Artur Pozarlik; Jim B. Kok. 2008. "Numerical prediction of interaction between combustion, acoustics and vibration in gas turbines." The Journal of the Acoustical Society of America 123, no. 5: 3404-3404.