Review
Energy & Fuels
Muhammad Tanveer, Eun Su Lim, Kwang-Yong Kim
Summary: This review article focuses on the development of membraneless microfluidic fuel cells, highlighting the microchannel geometry and electrode architecture. It discusses the impact of mixing and depletion regions on performance, as well as the enhancement of mass transfer through effective design of channels and electrodes.
Article
Energy & Fuels
Muhammad Tanveer, Kwang-Yong Kim
Summary: A novel flow channel configuration of a membraneless microfluidic fuel cell (MMFC) with porous flow-through electrodes was numerically investigated, showing that a hollow structure in the central flow channel coupled with porous electrodes performed the best in terms of peak power density.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Li Li, Lei Ling, Yajun Xie, Shuai Shan, Shaoyi Bei, Keqing Zheng, Qiang Xu
Summary: Counter-flow microfluidic fuel cell faces problems of non-uniform reaction rate distribution and poor electrode contribution. This study introduces a novel trapezoidal electrode design to improve its performance. Numerical analyses show that the isosceles trapezoidal electrode performs better than rectangular electrodes even at lower flow rates. The improved performance is attributed to the enlarged active region, reduced ionic resistance, and distinctive fluid distribution. Further optimization studies suggest that the isosceles trapezoidal design is preferred. Overall, the trapezoidal electrode shows promise for counter-flow microfluidic fuel cells and warrants further development.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Energy & Fuels
Ji-Hyun Oh, Muhammad Tanveer, Kwang-Yong Kim
Summary: A novel double-bridge shape was proposed for a membraneless microfluidic fuel cell, leading to improved electrochemical performance. Parameter studies showed that adjusting different channel parameters could optimize power density and enhance energy conversion efficiency in the fuel cell.
Article
Biophysics
Myunghun Kim, Youngju Kwon, Yoomin Ahn
Summary: This study developed eco-friendly and disposable paper-based membraneless microfluidic enzymatic fuel cells (EFCs) without any mediators to reduce toxicity and cost. Glucose oxidase and laccase were immobilized on multi-walled carbon nanotube electrodes to catalyze the redox reaction of glucose and oxygen, with experimental results showing that glucose concentration affects cell performance.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Thermodynamics
Li Li, Hongkang Wang, Shaoyi Bei, Yuanjiang Li, Yanyun Sun, Keqing Zheng, Qiang Xu
Summary: This study investigates the design and operation of a counter-flow microfluidic fuel cell and finds that the size and position of the electrode effective zone vary under different operation conditions. It is also discovered that the cathode length should be smaller than the anode length due to faster diffusion rate and improved electrochemical reaction rate. Concentration-related activation loss plays a key role in the performance of the fuel cell, and unequal initial flow rates are preferred over unequal initial reactant concentrations.
Review
Green & Sustainable Science & Technology
Yifei Wang, Shijing Luo, Holly Y. H. Kwok, Wending Pan, Yingguang Zhang, Xiaolong Zhao, Dennis Y. C. Leung
Summary: Microfluidic fuel cells, utilizing microfluidic flows as electrolytes, have shown significant improvements in power output and fuel utilization, with various fuel options being explored. Novel cell designs based on cellulose paper and fabric materials offer promising applications in medical diagnostics, wearable health devices, and smart logistics, despite facing competition from conventional plastic cells due to extra pumping requirements.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Review
Biotechnology & Applied Microbiology
Hongwei Ning, Fuqi Zhao, Teng Zhou
Summary: This paper discusses the recent progress of microfluidic electrochemical fuel cells (MFEFCs), which play important roles in production and life. Compared to other types of fuel cells, MFEFCs have a broader range of applications and are less susceptible to external environment. The paper summarizes the latest research results and outlines the potential future development and applications of MFEFCs.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Energy & Fuels
Nesrine Chaabene, Kieu Ngo, Mireille Turmine, Vincent Vivier
Summary: The objective of this work is to develop a membraneless microfluidic redox flow battery (RFB) using C(2)mimTFSI as support electrolyte with Quinone (Q) as negolyte and iron chloride (FeCl2) as posolyte. The electrochemical properties and performance of the microbattery were characterized through polarization curve and cyclic voltammetry. The proof-of-concept of the system showed an open circuit potential of 0.6 V and a current density ranging from 0.3 to 0.65 mA.cm(-2) for total flow rates of 10 to 20 mu L.min(-1). A maximum power of 40 mu Wcm (2) was obtained with this microbattery.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Dingding Ye, Pengqing Zhang, Jun Li, Xun Zhu, Rong Chen, Qiang Liao
Summary: An innovative in situ approach was proposed to visualize biofilm formation in the microchannel for the microfluidic microbial fuel cell (MMFC) anode, which showed that biofilm formed under moderate flow rate exhibited superior bioelectrochemical performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Qiao Lan, Dingding Ye, Xun Zhu, Rong Chen, Qiang Liao
Summary: By embedding a paper separator in microfluidic fuel cells, the rapid gas removal and low ohmic resistance lead to improved fuel transfer and reduced ohmic loss, enhancing cell performance. Although there is frequent fluctuation in current density due to periodic bubble growth and removal, the fluctuation amplitude decreases with the paper separator present, resulting in better cell performance.
Article
Green & Sustainable Science & Technology
Lanka Tata Rao, Satish Kumar Dubey, Arshad Javed, Sanket Goel
Summary: Laser-induced graphene (LIG) is a three dimensional porous material with excellent properties, and in this study, a low-cost microfluidic fuel cell with LIG electrodes was proposed. By optimizing parameters, the performance of the fuel cell was enhanced.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Engineering, Chemical
Tong Zhang, Chuhe Yu, Xun Zhu, Dingding Ye, Yang Yang, Rong Chen, Qiang Liao
Summary: The sequential-flow MFC utilizes an air-breathing cathode and a porous flow-through anode to effectively avoid fuel crossover, achieving high power output. Electrode aspect ratios, spacing, fuel/electrolyte concentration, and flow rate/ratio significantly impact the performance of MFCs.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Thermodynamics
Ya-lu Fu, Biao Zhang, Xun Zhu, Ding-ding Ye, Pang-Chieh Sui, Ned Djilali, Qiang Liao
Summary: In this study, pore-scale Lattice Boltzmann models were developed to investigate the air-breathing cathode of membraneless microfluidic fuel cells. The results indicated that the microstructure of the gas diffusion layer played a crucial role in oxygen transport and reaction, while the electrolyte flow rate showed minimal impacts.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Biswajit Samir De, Joshua Cunningham, Neeraj Khare, Jing-Li Luo, Anastasia Elias, Suddhasatwa Basu
Summary: The study demonstrates the tandem operation of a membraneless, two-phase flow microfluidic electrolysis cell and fuel cell, which is a step towards developing an independent micropower source. By controlling the flow rate of electrolyte, gas product mixing and crossover can be avoided. The tandem operation of mu EC-mu FC in acidic and alkaline electrolytes shows stable and efficient characteristics.
Article
Energy & Fuels
Ji-Hyun Oh, Tien-Dung Vuong, Kwang-Yong Kim
Summary: This work conducted a design optimization study to improve the performance of a membraneless microfluidic fuel cell with a double-bridge cross-section of the flow channel. The governing equations were solved numerically to analyze the electrochemical phenomena and evaluate the performance of the fuel cells. Optimization was performed using a genetic algorithm combined with a surrogate model to maximize the peak power density. The optimal design showed a 57.6% increase in peak power density compared to the reference design.
Article
Energy & Fuels
Tien-Dung Vuong, Kwang-Yong Kim
Summary: This study investigated the effects of a dual-bleeding port recirculation channel on the aerodynamic performance of a single-stage transonic axial compressor and optimized its configuration to enhance operating stability. The addition of the bleeding channel increased its stabilizing effect compared to a single-bleeding channel. Optimization resulted in a 51.36% increase in stall margin with only slight reductions in peak adiabatic efficiency and maximum pressure ratio.
Article
Engineering, Mechanical
Nam-Hun Kim, Kwang-Yong Kim
Summary: This study proposes a novel fluidic oscillator shape with a tapered outlet and numerically evaluates its performance parameters. The results show that the tapered outlet improves the overall performance of the fluidic oscillator without a significant increase in pressure drop.
TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS B
(2022)
Article
Agricultural Engineering
Dang Dinh Nguyen, Thinh Quy Duc Pham, Muhammad Tanveer, Haroon Khan, Ji Won Park, Cheol Woo Park, Gyu Man Kim
Summary: This study introduces a deep learning-based method to optimize the performance of a membraneless microfluidic fuel cell. By combining artificial neural network (ANN) and genetic algorithm (GA), the method achieves a high level of accuracy in determining the optimal inputs for maximum power density.
BIORESOURCE TECHNOLOGY
(2022)
Article
Thermodynamics
Hyeon-Seok Shim, Kwang-Yong Kim
Summary: The study investigates the effects of the number of blades on the impeller-volute interaction and flow instability in a centrifugal pump. Numerical simulations and experimental data are used to analyze the fluctuations in performance parameters and local pressure caused by different blade numbers.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
(2022)
Article
Thermodynamics
Tehmina Ambreen, Arslan Saleem, Muhammad Tanveer, K. Anirudh, S. A. Shehzad, Cheol Woo Park
Summary: This study investigates the entropy generation and hydrothermal characteristics of different pin-fin configurations using water-based MWCNT and MWCNT/GNP nanofluids in a heat sink. Results show that the triangular pin-fin heat sink performs the best, followed by the rhombus and hydrofoil pin-fin heat sinks.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Ji-Hyun Oh, Tien-Dung Vuong, Kwang-Yong Kim
Summary: In this study, design optimization was performed to improve the performance of a membraneless microfluidic fuel cell. The optimal shape demonstrated a peak power density that was 252% higher than that of the reference shape.
TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS B
(2022)
Review
Thermodynamics
Muhammad Tanveer, Tehmina Ambreen, Haroon Khan, Gyu Man Kim, Cheol Woo Park
Summary: Paper-based microfluidic fuel cells (PMFC) have gained significant attention since 2014, being used in various applications such as sensors, wearable devices, and diagnostic testing. PMFCs utilize the characteristics of paper substrate and microfluidics to achieve fuel cell operation without the need for external pumps and membranes. Different fuels have been explored in PMFCs, each with its own advantages and disadvantages. This review article provides a summary of PMFC technology, including its fundamentals, fabrication methods, performance with various fuels, challenges, and future prospects. Recent investigations have shown improved power density and voltage through stacking multiple cells, and enzymatic and microbial PMFCs show potential for wearable devices and lab-on-chip applications.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Analytical
Naas Toufik Tayeb, Shakhawat Hossain, Abid Hossain Khan, Telha Mostefa, Kwang-Yong Kim
Summary: This study conducted three-dimensional numerical investigations of a novel passive micromixer to analyze the hydrodynamic and thermal behaviors of Nano-Non-Newtonian fluids. The research found that for high nanofluid concentrations, a strong chaotic flow significantly enhances the hydrodynamic and thermal performances at all Reynolds numbers. The proposed micromixer showed comparable mixing energy cost to a recent micromixer in terms of fluid homogenization.
Article
Thermodynamics
Haroon Khan, Muhammad Tanveer, Dang Dinh Nguyen, Asad Ullah, Min Chul Shin, Moon Kyu Kwak, Cheol Woo Park, Gyu Man Kim
Summary: This article presents a two-dimensional stacking of microfluidic enzymatic biofuel cells (EBFCs) using a cascade-style serpentine-shaped microfluidic channel. The use of a mixed single electrolyte stream results in stable connection efficiencies, and a novel composite material is used as an air-breathing biocathode. The experimental results show that enzyme immobilisation increases with the number of layers, and the connection efficiencies for various configurations are stable, demonstrating the potential of stacking single-stream microfluidic EBFCs to meet the power requirements of small-scale electronic devices.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Khanh-Duy Cong Do, Duy-Hung Chung, Dang-Quoc Tran, Cong-Truong Dinh, Quang-Hai Nguyen, Kwang-Yong Kim
Summary: Effective cooling structure design is crucial in modern jet engines for improving turbine efficiency and maintaining structural integrity. This study investigates the flow-field and heat transfer characteristics of pin-fin arrays with roughed endwalls, and proposes optimized endwall configurations to enhance heat transfer capacity.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Analytical
Telha Mostefa, Aissaoui Djamel Eddine, Naas Toufik Tayeb, Shakhawat Hossain, Arifur Rahman, Bachiri Mohamed, Kwang-Yong Kim
Summary: In this study, a numerical investigation is conducted to study the unsteady laminar flow of high viscosity fluid in a twisted double planetary mixer. The results show that through the modulation of rotational velocities, chaotic advection can be achieved, enhancing fluid mixing efficiency under low Reynolds and high Peclet numbers.
Article
Engineering, Mechanical
Mariyam Sattar, Meshal Alzaid, Naveed Ur Rehman Junejo, Rizwan Ahmed Malik, Muhammad Tanveer, Muhammad Latif
Summary: This study provides an analytical modeling and analysis method to simulate the behavior of solar panels and calculate the disruption response of SADA rotating flexible loading. The results show that increasing the number of rotor teeth increases the vibration frequency and decreases the vibration amplitude.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2023)
Editorial Material
Chemistry, Analytical
Kwang-Yong Kim
Review
Green & Sustainable Science & Technology
Haroon Khan, Muhammad Tanveer, Cheol Woo Park, Gyu Man Kim
Summary: Enzymatic biofuel cells (EBFCs) are a promising technology that utilizes enzymes as biocatalysts for clean energy production. Integrating EBFCs into microfluidic architecture allows for their application in portable, implantable, and wearable microelectronics. However, challenges such as inefficient fuel oxidation, short lifetimes, and limited power density hinder their development. This review comprehensively discusses the attributes, microfabrication techniques, potential applications, and challenges of microfluidic EBFCs, providing insights into the past, present, and future of this emerging green technology.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
