Article
Energy & Fuels
Yuhao Xu, Xiaobing Luo, Zhengkai Tu
Summary: This study investigates a new system that combines cooling, heating, and power using a solid oxide fuel cell (SOFC) with a LiBr absorption chiller and water tank. The study evaluates the influence of the working conditions of the SOFC on its performance and also considers the effects of the working conditions of the stack and absorption chillers.
Article
Green & Sustainable Science & Technology
Behrad Alizadeh Kharkeshi, Mahmood Mehregan, Mohammad Sheykhi
Summary: A new combined cooling heating and power (CCHP) system is proposed to recover waste heat from the proton exchange membrane (PEM) fuel cell. The system consists of a PEM, an absorption chiller, an auxiliary boiler, and hydrogen and heat storage tanks. The article evaluates the power and heat of the fuel cell using an electrochemical model of PEM, and assesses the energy and exergy efficiencies, fuel energy saving ratio, annual carbon dioxide (CO2) emission reduction, annual CO2 tax reduction, and fuel saving based on critical operating parameters of PEM. The results show that the proposed CCHP system has an energy efficiency of about 66%, an exergy efficiency of 37%, can reduce CO2 emissions by 191 tons per year, and reduce the tax cost of carbon dioxide emissions by about $5700 per year.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Energy & Fuels
Shahriyar Ghazanfari Holagh, Maghsoud Abdollahi Haghghi, Ata Chitsaz
Summary: This study compares the thermodynamic, exergo-economic, and environmental performances of solid oxide fuel cells and molten carbonate fuel cells in driving trigeneration systems. The results show that the molten carbonate fuel cell-driven system outperforms the solid oxide fuel cell-driven one in terms of exergy and environmental efficiencies.
Article
Thermodynamics
Samiran Samanta, Dibyendu Roy
Summary: Thermo-economic and environmental analyses were conducted on a hybrid power generation system, consisting of a biomass steam gasifier, an indirect heated air turbine unit, carbon dioxide separation using a molten carbonate fuel cell, waste heat recovery via organic Rankine cycle and steam Rankine cycle. Response surface methodology was used for multi-objective optimization to determine the operating state with highest exergy efficiency and lowest cost of electricity. The optimized system achieved an exergy efficiency of 47.46% and cost of electricity of 0.0993 $/kWh, generating 1.3 MW power with an energy efficiency of 54.5% and capturing 5052.58 tonnes of CO2 annually, resulting in an environmental benefit of $0.758 million. This study shows that the optimized hybrid power system outperforms conventional biomass-based plants in terms of exergy efficiency and cost of electricity.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Akbar Salehi, Seyedmostafa Mousavi, Ahmad Fasihfar, Mehdi Ravanbakhsh
Summary: This study introduces a novel tri-generation plant composed of MCFC unit, SE, HRSG, and two types of ARCs. The system is evaluated from energy, exergy, and environmental impact perspectives. Parametric study shows that the proposed system with GAX or VAR cycle demonstrates acceptable functionality in thermodynamic and environmental aspects.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Fahad Alkasmoul, Mohammed Asaker, Aleksander Widuch, Marcin Malicki, Ryszard Zwierzchowski, Marcin Wolowicz
Summary: This paper presents an innovative hybrid source for electricity, cooling, and desalinated water production based on a mixed fossil fuel/solar energy supply. The system, equipped with a triple-component chiller configuration, has been erected and commissioned in Saudi Arabia to supply media to adjacent buildings of the Solar Village complex. The system is designed to meet the increased demand for cooling and desalinated water, especially in remote areas with fluctuating availability of electricity from the grid during the summer period. The results of the installation commissioning show that the system achieves maximum efficiency when renewable energy production is at its highest.
Article
Thermodynamics
Catarina G. dos Santos, Julia P. Ruivo, Leticia B. Gasparini, Maria Thereza de M. G. Rosa, Darci Odloak, Miriam Tvrzska de Gouvea
Summary: This paper proposes a rigorous model for predicting the operation of an air cooled chiller in a large office building. It also presents simple correlations for predicting heat exchange coefficients and pressure drops. The rigorous model is shown to accurately predict the operation of the chiller and optimize energy consumption. The importance of considering evaporator pressure drop is emphasized.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Gabor L. Szabo
Summary: This article discusses the significant energy consumption of HVAC systems in buildings and proposes a solution of utilizing a multi-functional energy production system. The solution consists of heat pumps and a gas engine and can operate in different modes. A qualitative comparison of the modes is conducted based on energy and exergy, and simplified equations are developed for comparison and calculation. A case study further verifies the feasibility and effectiveness of the theoretical analysis.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Thermodynamics
Man-Wen Tian, Azher M. Abed, Bhupendra Singh Chauhan, Theyab R. Alsenani, Hamad Almujibah, Fatma Aouaini, Salem Alkhalaf, Ahmed Deifalla
Summary: In this study, an integrated system consisting of a gas engine, carbon dioxide capture unit, absorption chiller, and greenhouse is proposed and modeled. The greenhouse directly utilizes the produced CO2 from the gas engine through the carbon dioxide capturing unit to mitigate CO2 emissions into the atmosphere. The system can generate electricity for sale to the grid, with a maximum potential net interest of $800,000 during cold seasons and $2,500,000 during warm seasons. Additionally, the system achieves a maximum coefficient of performance (COP) of 1.007 and reduces CO2 emission rates by at least 50%.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Jaroslaw Milewski, Viktoriya Podhurska, Aliaksandr Martsinchyk, Bogdan Vasyliv, Olaf Dybinski
Summary: This study investigates the influence of contact force on contact resistance between the current collector and the porous nickel layer of a fuel cell electrode through experimental and theoretical research. The main findings are: (i) the greater the force, the lower the contact resistance; (ii) above a certain level, the force applied to the electrode produces no significant change in contact resistance. An MCFC mathematical model is proposed to explain this phenomenon and provide a quantitative assessment of its impact on the performance of the entire fuel cell. The results demonstrate significant improvement in MCFC operating parameters when the compression force is increased to 40 N/cm2, but further force increase does not lead to appreciable improvement.
JOURNAL OF POWER SOURCES
(2023)
Article
Thermodynamics
Shiyi Chen, Nan Zhou, Mudi Wu, Shubo Chen, Wenguo Xiang
Summary: This paper investigates the integration of a natural gas-fueled MCFC with internal reforming and chemical looping air separation (CLAS) to achieve high-efficiency power generation with CO2 capture. The system is analyzed for thermodynamic and economic performance, and the results show the plant net power efficiency, CO2 capture rate, and cost of electricity.
Article
Engineering, Multidisciplinary
Ahmed H. Yakout, Hany M. Hasanien, Hossam Kotb
Summary: This paper utilized the marine predator algorithm (MPA) to find the optimal parameters for defining the polarization relationship of PEMFC, achieving a precise steady state model and demonstrating high accuracy compared to other optimization techniques.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Shirko Jafary, Shahram Khalilarya, Ali Shawabkeh, Makatar Wae-hayee, Mehran Hashemian
Summary: This study compares two solar powered trigeneration systems from energetic and exergetic viewpoints. The system with ORC-IHE configuration demonstrated higher energy and exergy efficiency compared to the RORC configuration, with energy efficiencies of 93.35% and 86.66%, and exergy efficiencies of 12.69% and 6.641%, respectively.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Mohammad Tahmasebzadehbaie, Hoseyn Sayyaadi
Summary: Hybrid flare and flue gas recovery methods have gained attention due to their improved efficiency and environmental friendliness. A proposed hybrid system integrates gas turbine, natural gas liquids refinery, and absorption chiller to recover flare and flue gas in an oil well. Thermo-economic analysis and sensitivity analysis show that the system is cost-effective, with the NGL's recovery section being the most sensitive equipment.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Chemistry, Physical
Roni Mallick, V Prabu
Summary: Two emerging technologies, plasma gasification and molten carbonate fuel cell (MCFC), are integrated to produce hydrogen and power using different system configurations. Waste such as refused derived fuel (RDF) is chosen as feedstock due to concerns about fossil fuel emissions. Simulation and analysis show that the system Syngas:CH4 [PSA: MCFC] achieves the highest energy and exergy efficiencies of 54.12% and 52.02% respectively. The introduction of MCFC significantly reduces annual CO2 emissions and the cost of electricity ranges from 77.48 to 107.93 $/MWh. The integrated plasma gasification with MCFC using waste as feedstock could potentially support co-generation of H2 and power with a cleaner environment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)