Article
Chemistry, Physical
S. Meenakshi, Kapil Sonkar, Sachin Chugh, Rajesh Badhe, G. S. Kapur, S. S. V. Ramakumar
Summary: Membrane Electrode Assembly (MEA) in a Polymer Electrolyte Membrane Fuel Cell (PEMFC) is crucial for the performance of the fuel cell system. This study investigates the degradation of a stack operated MEA and characterizes it using electrochemical and physical methods. The results show that the MEA assembly decomposes at specific temperatures for the Nafion membrane, carbon-supported catalyst, and carbon-based GDL. The degradation is evidenced by the decrease of electrocatalyst surface area and the migration of catalyst particles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Ali Jabbary, Sadra Rostami Arnesa, Hossein Samanipour, Nima Ahmadi
Summary: A numerical 3D procedure based on the Finite Volume Method is used to analyze PEMFC with a rhombus design, showing the impact of the design on output characteristics and the significant effect of water accumulation on cell performance. Model B improves current density and power consumption compared to the base model.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2021)
Article
Energy & Fuels
Xuanyu Liu, Zhifu Zhou, Minli Bai, Poowanart Poramapojana, Yang Li, Linsong Gao, Yulong Li, Yubai Li
Summary: Three-dimensional simulations were conducted to study the liquid water cooling design of a proton exchange membrane fuel cell (PEMFC) with a thin catalyst-coated membrane (CCM). The results showed that the cooling inlet temperature directly affects the working temperature of the PEMFC, while co-directional flow of liquid and air can suppress the formation of liquid water near the cathode outlet. Additionally, moderate cooling flow rate is preferred to reduce temperature non-uniformity within the PEMFC.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Wan Yue, Diankai Qiu, Peiyun Yi, Linfa Peng, Xinmin Lai
Summary: In this study, a series of experiments were conducted to explore the degradation mechanism of the frame in the proton exchange membrane (PEM) fuel cell. It was found that acid solution contributes significantly to the failure of the frame, with peeling strength showing the most significant decline. The study reveals the degradation process of the frame for the first time, enhancing understanding of frame failure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Yue Wan, Diankai Qiu, Peiyun Yi, Linfa Peng, Xinmin Lai
Summary: The design of a gradient catalyst layer, with different wetting properties on each sub-layer, significantly enhances the performance of a proton exchange membrane fuel cell. The gradient layer improves the mass transfer capacity and power density of the fuel cell, resulting in higher efficiency.
Article
Chemistry, Physical
Min Wang, Yujie Ding, Jinhua Hu, Liangfei Xu, Xiaofan Yang
Summary: In this study, a mathematical model is established to investigate the water and heat transport in the cathode channel of a PEM fuel cell. The results show the evolution stages of water droplets and the variations of phase change rate in different sections of the channel. The distribution of temperature and vapor mass fraction also exhibits certain patterns.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Xiang Lyu, Tim Van Cleve, Erica Young, Jianlin Li, Haoran Yu, David A. Cullen, K. C. Neyerlin, Alexey Serov
Summary: Proton exchange membrane fuel cells (PEMFCs) powered by green hydrogen (H2) are a promising alternative to traditional hydrocarbon-fueled power generators. However, further improvements are needed in efficiency, durability, and low-cost production for widespread adoption. Most strategies to improve PEMFC electrodes utilize single material sets, but anisotropic electrode structures with locally tunable properties may offer enhanced performance due to improved transport.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Kaichuang Yang, Yuhao Wang, Zhibin Yang, Yarong Wang, Chao Jin
Summary: The degradation caused by humidity decreases the electrical conductivity and increases the polarization resistance of STC cathodes, but this degradation can be partially recovered by operating in dry air.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Saifei Pan, Jiaqi Qin, Fandi Ning, Chuang Bai, Qinlin Wen, Min Shen, Yali Li, Yujiang Song, Jiafan Chen, Yunjie Huang, Yecheng Zou, Wei Feng, Xiaochun Zhou
Summary: Ordered membrane electrode assembly (MEA) is a frontier research field in proton exchange membrane fuel cells (PEMFCs). The use of a well-dispersed Nafion array prepared by freeze-drying greatly improves the performance of PEMFC, increasing the specific surface area and electrochemical surface area of the catalyst layer significantly. This research demonstrates that the freeze-drying method effectively prevents aggregation of the Nafion array and enhances overall performance, providing an ideal basic material for the preparation of the ordered MEA.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Energy & Fuels
Peng Ren, Pucheng Pei, Dongfang Chen, Yuehua Li, Ziyao Wu, Lu Zhang, Zizhao Li, Mingkai Wang, He Wang, Bozheng Wang, Xizhong Wang
Summary: This paper proposes a novel analytic method for MEA parameters using micro-current excitation, which allows for the simultaneous calculation of key parameters without the need for high sampling frequency and data filtering of voltage signals. The effects of operating conditions on MEA parameters, as well as the impact of relative humidity on hydrogen crossover, are further investigated in this study.
Article
Electrochemistry
Utsav Raj Aryal, Majid Aziz, Ajay K. Prasad
Summary: Aircraft fuel tank inerting is a method to reduce the flammability of fuel vapor by replacing oxygen with inert gas. The Electrochemical Gas Separation and Inerting System (EGSIS) is a new on-board method to generate and supply nitrogen-enriched air to the fuel tank. In this paper, EGSIS is modeled and simulated to study its performance indicators and explore operating strategies for improving system performance.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Mert Tas, Gulsah Elden
Summary: The effects of cell temperature and relative humidity on charge transport parameters are analyzed numerically in this study. The results show that the current densities increase with increasing temperature and humidity, reaching a maximum in the rib regions. The behaviors of electrolyte potentials are similar to the changes in temperature and humidity. The cathode electrical potentials do not change significantly with increasing temperature and humidity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yu-Xin Liu, Wei-Yi Zhang, Guo-Kang Han, Ya-Wei Zhou, Ling-Feng Li, Fan-Peng Kong, Yun-Zhi Gao, Chun-Yu Du, Jia-Jun Wang, Lei Du, Wen-Bin Cai, Ge-Ping Yin
Summary: This study reveals that dynamic potential scanning can gradually regenerate poisoned Pt/C, and that SO2 can be converted to easily oxidized forms at a low potential. Based on this mechanism, a square wave-based protocol is proposed to completely regenerate SO2-poisoned Pt surfaces within an unprecedented three cycles.
Article
Thermodynamics
Zihao Liao, Lin Wei, Ahmed Mohmed Dafalla, Jian Guo, Fangming Jiang
Summary: The flow field configuration of a PEMFC is crucial for performance enhancement, and the study found that the contrary arrangement design provides more uniform distributions of reactants and reaction products compared to traditional designs. Additionally, the contrary arrangement design reduces mass transport resistance and boosts heat/mass transfer rates, especially under higher relative humidity and larger operating pressure conditions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Chemical
Federico Perdomo, Matilde Abboud, Erika Teliz, Fernando Zinola, Veronica Diaz
Summary: The performance of a fuel cell depends on multiple factors, with the preparation of the membrane electrode assembly (MEA) being one of the most important. The study showed a significant dependence of charge transfer resistance on temperature, with pressure dependence being secondary. Changes in open circuit potential after varying temperature, pressure, and catalyst load were observed, affecting maximum power and efficiency.
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2021)
Article
Engineering, Aerospace
Fangzhou Song, Hangbin Zheng, Yanxin Zhang, Qiao Xu, Ke Gao, Yang Tian, Chao Song, Qingyang Luo, Haichen Yao, Xianglei Liu, Yimin Xuan
Summary: This paper investigates the feasibility of a regenerative solar thermal propulsion system (RSTP) incorporating thermal energy storage to overcome the thrust failure issue in the shadow area. A numerical model is built to consider the entire energy transfer process and is verified through experimental measurements. The results show that the system can complete heat storage within the illumination time for low Earth orbit and achieve high thrust and specific impulse in the solar eclipse region. Additionally, the system can operate continuously in the shadow area for a certain duration. This work provides alternative approaches for microsatellite propulsion with high specific impulse, high thrust, and continuous operation.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Energy & Fuels
Qingyang Luo, Xianglei Liu, Qiao Xu, Yang Tian, Haichen Yao, Jianguo Wang, Shushan Lv, Chunzhuo Dang, Yimin Xuan
Summary: This study demonstrates the concurrent enhancement of solidus thermal conductivity and specific heat capacity by doping MgO nanoparticles into LiNO3/NaCl. The improved thermal properties are attributed to the low interfacial thermal resistance between MgO and LiNO3/NaCl. The total energy storage density increases from 662.9 J/g to 671.7 J/g for temperatures ranging from 50-300°C. The optimal concentration of MgO nanoparticles is found to be 4 wt%.
Article
Chemistry, Multidisciplinary
Zhonghui Zhu, Yimin Xuan, Xianglei Liu, Qibin Zhu
Summary: This study investigates the stochastic feature evolution in photocatalytic systems and proposes a statistical model to describe the uncertainties of light absorption, charge carrier migration, and surface reaction. The results show that the density distribution of surface electrons changes from skewed to approximately uniform distribution with increasing incident photon density. The rate-determining step of surface reactions shifts from charge carrier kinetics to reactant activation processes with the rise in system temperature. By optimizing the operational parameters and active site density, the electron-capturing probability of active sites can be significantly increased. The established model is validated by experimental photoactivity results.
Article
Energy & Fuels
Xinrui Wang, Xianglei Liu, Hangbin Zheng, Chao Song, Ke Gao, Cheng Tian, Nan Sun, Zhixing Jiang
Summary: This study proposes a hierarchically doping strategy to fabricate hierarchically doped calcium carbonate pellets suitable for scalable applications. By doping Al in the internal cores and enriching Mn in the external shells, the average solar absorptance of the pellets achieves 87.15% with a 7.4% increase compared with traditionally homogeneous doping approaches. The energy storage density remains as high as 1143 kJ/kg after 20 cycles, which is enhanced by 16.6% over homogeneous counterparts. This work presents a novel approach for the design of high-performance pellets for achieving scalable and efficient thermochemical energy storage under direct solar irradiation.
Article
Chemistry, Physical
Ke Gao, Xianglei Liu, Qi Wang, Zhixing Jiang, Cheng Tian, Nan Sun, Yimin Xuan
Summary: Solar thermochemical CO2 splitting using Ce- and Al-doped SrMnO3 perovskites is proposed for efficient solar fuel production. The doped material shows an ultrahigh CO yield and improved CO2 splitting kinetics compared to undoped SrMnO3. It also exhibits excellent stability over multiple cycles. This work provides a new path for high-performance solar thermochemical CO2 splitting.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Thermodynamics
Hangbin Zheng, Xianglei Liu, Yimin Xuan, Yulong Ding, Gilles Flamant
Summary: This paper demonstrates highly efficient and stable direct solar-driven thermochemical energy storage in fluidized reactors using (AlMgFeMn)OxCaCO3 pellets. The pellets showed excellent long-term stability and improved solar-thermal conversion efficiency compared to white (AlMg)OxCaCO3 pellets. The presence of poly-oxide (AlMgFeMn)Ox crystals and steam played a positive role in enhancing reaction kinetics and stability.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Yang Tian, Xianglei Liu, Qingyang Luo, Haichen Yao, Jianguo Wang, Chunzhuo Dang, Shushan Lv, Qiao Xu, Jiawei Li, Li Zhang, Hongyu Zhao, Yimin Xuan
Summary: Inspired by the microstructure and functions of the sea urchin skeleton, this study introduces four different metal foam skeletons based on triply periodic minimal surface (TPMS) to enhance the performance of latent heat storage technology. The metal foam-PCM (MFPCM) based on the Primitive structure shows the fastest thermal energy storage rate, reducing the melting time by 20% compared to the traditional structure (Lattice). The compact internal structure of TPMS and the positive gradient in porosity contribute to the improved performance. This study provides a new idea for designing high-performance MFPCM and promotes the application of bionics in accelerating latent heat thermal energy storage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Jingrui Liu, Yimin Xuan, Liang Teng, Qibin Zhu, Hangbin Zheng, Xianglei Liu
Summary: Thermogravimetric analysis is widely used to characterize thermoinduced chemical reactions and mass variation. However, the emergence of photothermal characteristics research has led to the need for a new direct light-driven thermogravimetric analyzer. This analyzer provides a fast pyrolysis weight loss measurement based on high temperature measurement under light flux, allowing for the analysis of photothermal conversion characteristics and the study of the mechanism of photothermal conversion and chemical reaction kinetics.
Article
Energy & Fuels
Qiao Xu, Xianglei Liu, Qingyang Luo, Haichen Yao, Jianguo Wang, Shushan Lv, Chunzhuo Dang, Yang Tian, Yimin Xuan
Summary: This study proposes an eco-friendly and large porosity wood-derived SiC ceramics-based phase change composites to address the weak solar absorptance, low thermal conductivity, and leakage problems in solar thermal energy storage. By partially removing lignin and hemicellulose from natural wood, vertically aligned channels and compact SiC grains are formed in the wood-derived SiC ceramics, enabling the composite phase change materials to exhibit high thermal conductivity and large energy storage density. The proposed composites have a significantly higher solar absorptance and can effectively capture solar energy.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Energy & Fuels
Fengyi Yang, Qiao Xu, Yimin Xuan, Jingrui Liu, Chen Sun, Qingyang Luo, Xianglei Liu
Summary: In this study, a method for accurately assessing the enthalpy of eutectic salt in concentrated solar power (CSP) technology is presented. By using first-principles molecular dynamics (FPMD) simulations, the fusion enthalpy of a new ternary eutectic salt is accurately predicted with a low calculation error. This work provides theoretical guidance for predicting the enthalpy of molten salts and has implications for their widespread application.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Thermodynamics
Haichen Yao, Xianglei Liu, Yang Tian, Qiao Xu, Qingyang Luo, Tianze Ren, Jianguo Wang, Shushan Lv, Chunzhuo Dang, Yimin Xuan
Summary: A bionic phase change materials (PCMs) capsule mimicking the natural structure of albizzia pollen is proposed for thermal energy storage. The pollen-type PCMs capsules have the fastest melting time, reducing by 19%, 24%, 41%, and 61% compared to other types of capsules. By optimizing the ratio of fin length to radius, the melting time can be further reduced by 62% and the exergy efficiency improved by 16%. Experimental results demonstrate faster heat storage rate in a PBTES system using optimized pollen-based capsules.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Lin Qiu, Kening Yan, Yanhui Feng, Xianglei Liu
Summary: The low thermal conductivity and easy leakage of phase change materials hinder their further application for thermal energy storage. This study investigates the effects of nano additives on the phase change and thermal properties of bionic hierarchical porous aluminum nitride-polyethylene glycol (PEG/AlN) composites. Alumina nanoparticles have the largest enhancement effect on the thermal conductivity of PEG. The thermal response of the Al2O3-enhanced PEG is maintained after 100 heating/cooling cycles, and its thermal conductivity is 20.41 W/m.K.
Article
Thermodynamics
Haichen Yao, Xianglei Liu, Jiawei Li, Qingyang Luo, Yang Tian, Yimin Xuan
Summary: This study proposes bionic phase change material (PCM) capsules that mimic the internal and external structure of chloroplast-granum, demonstrating significantly faster heat storage compared to sphere type capsules. The improvement is attributed to the bionic folded shape and inner membrane structure, which enhance heat convection and facilitate heat conduction. Furthermore, the capsules are filled into the packed-bed in a staggered arrangement, increasing heat transfer area and enhancing disturbance flow. As a result, the melting time is reduced by 33.2% and average exergy storage rate and efficiency are enhanced by 48.4% and 8.3%, respectively.
Article
Chemistry, Physical
Kai Zhang, Chen Sun, Tao Chen, Fujun Niu, Zhiyi Huang, Qi Gao, Cuiping Xu, Xingjian Zhang, Qixiang Pian, Kunhong Che, Lei Gao, Xianglei Liu, Yimin Xuan
Summary: By using a low concentration metal salt solution solvothermal strategy, single transition metal atom centered clusters with Ni-O-Zn bond linkages were decorated onto sulphide photocatalysts, which promoted the separation of charge carriers and lowered the kinetic energy barrier of water molecule dissociation, resulting in a 68% increase in hydrogen production rate. These findings greatly advance the understanding of semiconductor surface activation strategies and provide important guidance for the rational design of efficient photocatalytic systems in the future.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Jingrui Liu, Yimin Xuan, Liang Teng, Chen Sun, Qibin Zhu, Xianglei Liu
Summary: The 3rd generation concentrated solar power technology is considered a potential strategy to solve the energy shortage and achieve carbon neutrality. The development of long-stable energy storage materials is crucial for overcoming the intermittency and instability of solar power. This article presents a calcium-based particle with a thermal expansion compensation strategy, enabling high energy densities and long storage times.
Article
Energy & Fuels
Shitong Fang, Houfan Du, Tao Yan, Keyu Chen, Zhiyuan Li, Xiaoqing Ma, Zhihui Lai, Shengxi Zhou
Summary: This paper proposes a new type of nonlinear VIV energy harvester (ANVEH) that compensates for the decrease in peak energy output at low wind speeds by introducing an auxiliary structure. Theoretical and experimental results show that ANVEH performs better than traditional nonlinear VIV energy harvesters under various system parameter variations.
Article
Energy & Fuels
Wei Jiang, Shuo Zhang, Teng Wang, Yufei Zhang, Aimin Sha, Jingjing Xiao, Dongdong Yuan
Summary: A standardized method was developed to evaluate the availability of solar energy resources in road areas, which combined the Analytic Hierarchy Process (AHP) and the Geographic Information System (GIS). By analyzing critical factors and using a multi-indicator evaluation method, the method accurately evaluated the utilization of solar energy resources and guided the optimal location selection for road photovoltaic (PV) projects. The results provided guidance for the application of road PV projects and site selection for route corridors worldwide, promoting the integration of transportation and energy.
Article
Energy & Fuels
Chang Liu, Jacob A. Wrubel, Elliot Padgett, Guido Bender
Summary: The study investigates the effects of coating defects on the performance of the anode porous transport layer (PTL) in water electrolyzers. The results show that an increasing fraction of uncoated regions on the PTL leads to decreased cell performance, with continuous uncoated regions having a more severe impact compared to multiple thin uncoated strips.
Article
Energy & Fuels
Marcos Tostado-Veliz, Xiaolong Jin, Rohit Bhakar, Francisco Jurado
Summary: In this paper, a coordinated charging price mechanism for clusters of parking lots is proposed. The research shows that enabling vehicle-to-grid characteristics can bring significant economic benefits for users and the cluster coordinator, and vehicle-to-grid impacts noticeably on the risk-averse character of the uncertainty-aware strategies. The developed pricing mechanism can reduce the cost for users, avoiding to directly translate the energy cost to charging points.
Article
Energy & Fuels
Duan Kang
Summary: Building an energy superpower is a key strategy for China and a long-term goal for other countries. This study proposes an evaluation system and index for measuring energy superpower, and finds that China has significantly improved its ranking over the past 21 years, surpassing other countries.
Article
Energy & Fuels
Fucheng Deng, Yifei Wang, Xiaosen Li, Gang Li, Yi Wang, Bin Huang
Summary: This study investigated the synergistic blockage mechanism of sand and hydrate in gravel filling layer and the evolution of permeability in the layer. Experimental models and modified permeability models were established to analyze the effects of sand particles and hydrate formation on permeability. The study provided valuable insights for the safe and efficient exploitation of hydrate reservoirs.
Article
Energy & Fuels
Hao Wang, Xiwen Chen, Natan Vital, Edward Duffy, Abolfazl Razi
Summary: This study proposes a HVAC energy optimization model based on deep reinforcement learning algorithm. It achieves 37% energy savings and ensures thermal comfort for open office buildings. The model has a low complexity, uses a few controllable factors, and has a short training time with good generalizability.
Article
Energy & Fuels
Moyue Cong, Yongzhuo Gao, Weidong Wang, Long He, Xiwang Mao, Yi Long, Wei Dong
Summary: This study introduces a multi-strategy ultra-wideband energy harvesting device that achieves high power output without the need for external power input. By utilizing asymmetry, stagger array, magnetic coupling, and nonlinearity strategies, the device maintains a stable output voltage and high power density output at non-resonant frequencies. Temperature and humidity monitoring are performed using Bluetooth sensors to adaptively assess the device.
Article
Energy & Fuels
Tianshu Dong, Xiudong Duan, Yuanyuan Huang, Danji Huang, Yingdong Luo, Ziyu Liu, Xiaomeng Ai, Jiakun Fang, Chaolong Song
Summary: Electrochemical water splitting is crucial for hydrogen production, and improving the hydrogen separation rate from the electrode is essential for enhancing water electrolyzer performance. However, issues such as air bubble adhesion to the electrode plate hinder the process. Therefore, a methodology to investigate the two-phase flow within the electrolyzer is in high demand. This study proposes using a microfluidic system as a simulator for the electrolyzer and optimizing the two-phase flow by manipulating the micro-structure of the flow.
Article
Energy & Fuels
Shuo Han, Yifan Yuan, Mengjiao He, Ziwen Zhao, Beibei Xu, Diyi Chen, Jakub Jurasz
Summary: Giving full play to the flexibility of hydropower and integrating more variable renewable energy is of great significance for accelerating the transformation of China's power energy system. This study proposes a novel day-ahead scheduling model that considers the flexibility limited by irregular vibration zones (VZs) and the probability of flexibility shortage in a hydropower-variable renewable energy hybrid generation system. The model is applied to a real hydropower station and effectively improves the flexibility supply capacity of hydropower, especially during heavy load demand in flood season.
Article
Energy & Fuels
Zhen Wang, Kangqi Fan, Shizhong Zhao, Shuxin Wu, Xuan Zhang, Kangjia Zhai, Zhiqi Li, Hua He
Summary: This study developed a high-performance rotary energy harvester (AI-REH) inspired by archery, which efficiently accumulates and releases ultralow-frequency vibration energy. By utilizing a magnetic coupling strategy and an accumulator spring, the AI-REH achieves significantly accelerated rotor speeds and enhanced electric outputs.
Article
Energy & Fuels
Yi Yang, Qianyi Xing, Kang Wang, Caihong Li, Jianzhou Wang, Xiaojia Huang
Summary: In this study, a novel hybrid Quantile Regression (QR) model is proposed for Probabilistic Load Forecasting (PLF). The model integrates causal dilated convolution, residual connection, and Bidirectional Long Short-Term Memory (BiLSTM) for multi-scale feature extraction. In addition, a Combined Probabilistic Load Forecasting System (CPLFS) is proposed to overcome the inherent flaws of relying on a single model. Simulation results show that the hybrid QR outperforms traditional models and CPLFS exceeds the best benchmarks in terms of prediction accuracy and stability.
Article
Energy & Fuels
Wen-Jiang Zou, Young-Bae Kim, Seunghun Jung
Summary: This paper proposes a dynamic prediction model for capacity fade in vanadium redox flow batteries (VRFBs). The model accurately predicts changes in electrolyte volume and capacity fade, enhancing the competitiveness of VRFBs in energy storage applications.
Article
Energy & Fuels
Yuechao Ma, Shengtie Wang, Guangchen Liu, Guizhen Tian, Jianwei Zhang, Ruiming Liu
Summary: This paper focuses on the balance of state of charge (SOC) among multiple battery energy storage units (MBESUs) and bus voltage balance in an islanded bipolar DC microgrid. A SOC automatic balancing strategy is proposed considering the energy flow relationship and utilizing the adaptive virtual resistance algorithm. The simulation results demonstrate the effectiveness of the proposed strategy in achieving SOC balancing and decreasing bus voltage unbalance.
Article
Energy & Fuels
Raad Z. Homod, Basil Sh. Munahi, Hayder Ibrahim Mohammed, Musatafa Abbas Abbood Albadr, Aissa Abderrahmane, Jasim M. Mahdi, Mohamed Bechir Ben Hamida, Bilal Naji Alhasnawi, A. S. Albahri, Hussein Togun, Umar F. Alqsair, Zaher Mundher Yaseen
Summary: In this study, the control problem of the multiple-boiler system (MBS) is formulated as a dynamic Markov decision process and a deep clustering reinforcement learning approach is applied to obtain the optimal control policy. The proposed strategy, based on bang-bang action, shows superior response and achieves more than 32% energy saving compared to conventional fixed parameter controllers under dynamic indoor/outdoor actual conditions.
