Modeling, simulation and optimization of membrane-based gas separation systems

1999 ◽  
Vol 54 (7) ◽  
pp. 943-955 ◽  
Author(s):  
Stefan Tessendorf ◽  
Rafiqul Gani ◽  
Michael L. Michelsen
Keyword(s):  
Gas Separation ◽  
Simulation And Optimization ◽  
Separation Systems ◽  
Modeling Simulation

scholarly journals Modeling, Simulation and Optimization of Piezoelectric Bimorph Transducer for Broadband Vibration Energy Harvesting

2017 ◽  
Vol 6 (4) ◽  
pp. 5 ◽  
Author(s):  
Nan Chen ◽  
Vishwas Bedekar
Keyword(s):  
Energy Harvester ◽  
Piezoelectric Properties ◽  
Vibration Energy ◽  
Piezoelectric Bimorph ◽  
Vibration Energy Harvesting ◽  
Compliance Matrix ◽  
Simulation And Optimization ◽  
Power Characteristics ◽  
Modeling Simulation ◽  
Length Width

We demonstrate the detailed analysis for conversion of piezoelectric properties into compliance matrix and simulate a series bimorph configuration for vibration based energy generation. Commercially available software COMSOL Multiphysics was used to apply boundary conditions for optimization of geometric parameters such as length, width and thickness of piezoelectric layer to study voltage and power characteristics of the harvester. The resulting energy harvester was found to generate 1.73 mW at 53.4 Hz across a 3MW load with an energy density of 13.08mJ/cm3. We also investigated feasibility of this model by comparing it with existing experimental data of known piezoelectric ceramic compositions and found good correlation between the two.

scholarly journals Molecularly engineered switchable photo-responsive membrane in gas separation for environmental protection

2019 ◽  
Vol 25 (4) ◽  
pp. 447-461 ◽  
Author(s):  
Aishah Rosli ◽  
Siew Chun Low
Keyword(s):  
Environmental Protection ◽  
Gas Separation ◽  
Energy Costs ◽  
Stimuli Responsive ◽  
Responsive Materials ◽  
Separation Systems ◽  
Non Invasive ◽  
Responsive Membranes ◽  
External Stimuli

In recent years, stimuli-responsive materials have garnered interest due to their ability to change properties when exposed to external stimuli, making it useful for various applications including gas separation. Light is a very attractive trigger for responsive materials due to its speedy and non-invasive nature as well as the potential to reduce energy costs significantly. Even though light is deemed as an appealing stimulus for the development of stimuli-responsive materials, this avenue has yet to be extensively researched, as evidenced by the fewer works done on the photo-responsive membranes. Of these, there are even less research done on photo-responsive materials for the purpose of gas separation, thus, we have collected the examples that answer both these criteria in this review. This review covers the utilisation of photo-responsive materials specifically for gas separation purposes. Photo-chromic units, their integration into gas separation systems, mechanism and research that have been done on the topic so far are discussed.

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