Optimizing pressure retarded osmosis spacer geometries: An experimental and CFD modeling study

2022 ◽  
pp. 120284
Author(s):  
Joshua Benjamin ◽  
Samar AL. Mashrafi ◽  
Andres Tejada-Martinez ◽  
Nancy Diaz-Elsayed ◽  
Mauricio E. Arias ◽  
...  
Keyword(s):  
Cfd Modeling ◽  
Pressure Retarded Osmosis ◽  
Modeling Study

Experimental and CFD Modeling Study of Inulin-Type Fructan Purification from a Model Solution by Diafiltration on a Pilot-Scale Unit

2014 ◽  
Vol 49 (8) ◽  
pp. 1125-1134 ◽  
Author(s):  
I. Elizabeth Ortiz-Cerda ◽  
Johanne Bonnin ◽  
Stephane Bostyn ◽  
Miguel A. Ruiz-Cabrera ◽  
Mario Moscosa-Santillán
Keyword(s):  
Pilot Scale ◽  
Model Solution ◽  
Cfd Modeling ◽  
Scale Unit ◽  
Modeling Study

scholarly journals An experimental and CFD modeling study of suspended droplets evaporation in buoyancy driven convection

2019 ◽  
Vol 375 ◽  
pp. 122006 ◽  
Author(s):  
A.E. Saufi ◽  
R. Calabria ◽  
F. Chiariello ◽  
A. Frassoldati ◽  
A. Cuoci ◽  
...  
Keyword(s):  
Cfd Modeling ◽  
Buoyancy Driven Convection ◽  
Modeling Study

Experimental validation and CFD modeling study of biomass fast pyrolysis in fluidized-bed reactors

Fuel ◽  
2012 ◽  
Vol 97 ◽  
pp. 757-769 ◽  
Author(s):  
Q. Xue ◽  
D. Dalluge ◽  
T.J. Heindel ◽  
R.O. Fox ◽  
R.C. Brown
Keyword(s):  
Fluidized Bed ◽  
Experimental Validation ◽  
Fast Pyrolysis ◽  
Cfd Modeling ◽  
Fluidized Bed Reactors ◽  
Modeling Study ◽  
Biomass Fast Pyrolysis

scholarly journals Mass Transport in Osmotically Driven Membrane Processes

Membranes ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 29
Author(s):  
Peng Xie ◽  
Tzahi Y. Cath ◽  
David A. Ladner
Keyword(s):  
Solute Transport ◽  
Cfd Simulation ◽  
Water Flux ◽  
Forward Osmosis ◽  
3D Models ◽  
Cfd Modeling ◽  
Membrane Processes ◽  
Pressure Retarded Osmosis ◽  
Computational Fluid Dynamics Cfd ◽  
The Impact

Forward osmosis (FO) and pressure retarded osmosis (PRO) are the two operational modes for osmotically driven membrane processes (ODMPs). ODMPs have gained increasing popularity in the laboratory over the years; however, OMDPs have not been applied in very many cases at full scale because they are still emerging technologies that require further development. Computational fluid dynamics (CFD) modeling coupled with solute transport evaluation provides a tool to study hydrodynamics and concentration polarization in FO and PRO. In this study a series of models were developed to predict water flux. The simulation results of empty-channel (with no feed spacer) membrane cells were verified by comparison with experimental results, showing that CFD simulation with solute transport is a reliable tool. Ensuing 2D and 3D models were built to study the impact of feed spacers on the velocity and concentration distribution inside the flow channels, and investigate whether the presence of spacers would enable enhancement of water flux. The results showed that spacers could change the concentration and velocity profile and they could reduce or enhance water flux depending on the inlet flow velocity and distance between the membrane and spacer.

Allene oxidation in jet-stirred reactor : a kinetic modeling study

1990 ◽  
Vol 87 ◽  
pp. 1159-1172 ◽  
Author(s):  
P Dagaut ◽  
M Cathonnet ◽  
B Aboussi ◽  
JC Boettner
Keyword(s):  
Kinetic Modeling ◽  
Stirred Reactor ◽  
Allene Oxidation ◽  
Modeling Study

Recovery boiler sootblowers: History and technological advances

TAPPI Journal ◽  
2015 ◽  
Vol 14 (1) ◽  
pp. 51-60
Author(s):  
HONGHI TRAN ◽  
DANNY TANDRA
Keyword(s):  
Cfd Modeling ◽  
Computing Systems ◽  
The Past ◽  
Technological Advances ◽  
Recovery Boilers ◽  
Computational Fluid Dynamics Cfd ◽  
Recovery Boiler ◽  
Steam Parameters ◽  
Insight Into ◽  
Deposit Removal

Sootblowing technology used in recovery boilers originated from that used in coal-fired boilers. It started with manual cleaning with hand lancing and hand blowing, and evolved slowly into online sootblowing using retractable sootblowers. Since 1991, intensive research and development has focused on sootblowing jet fundamentals and deposit removal in recovery boilers. The results have provided much insight into sootblower jet hydrodynamics, how a sootblower jet interacts with tubes and deposits, and factors influencing its deposit removal efficiency, and have led to two important innovations: fully-expanded sootblower nozzles that are used in virtually all recovery boilers today, and the low pressure sootblowing technology that has been implemented in several new recovery boilers. The availability of powerful computing systems, superfast microprocessors and data acquisition systems, and versatile computational fluid dynamics (CFD) modeling capability in the past two decades has also contributed greatly to the advancement of sootblowing technology. High quality infrared inspection cameras have enabled mills to inspect the deposit buildup conditions in the boiler during operation, and helped identify problems with sootblower lance swinging and superheater platens and boiler bank tube vibrations. As the recovery boiler firing capacity and steam parameters have increased markedly in recent years, sootblowers have become larger and longer, and this can present a challenge in terms of both sootblower design and operation.

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