Review
Energy & Fuels
Md. Arafat Hossain, Md. Rashidul Islam, Md. Alamgir Hossain, M. J. Hossain
Summary: Hydrogen is gaining popularity as a preferred choice for energy storage systems (ESSs) due to its high energy density, large storage capacity, and fast operational capabilities. Control systems, such as power electronic converters and DC link regulation systems, are crucial for the integration of hydrogen energy storage technologies into modern power grids. This review article provides a comprehensive examination of the current challenges, advancements, and deployments of control systems associated with hydrogen energy storage, aiming to assist researchers, engineers, and policymakers in understanding the current state and future possibilities of this technology.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Electrical & Electronic
Xiang Meng, Qi Li, Guorui Zhang, Weirong Chen
Summary: This article proposes a global composite operating cost minimization strategy (CMS), considering both fuel consumption and depreciation of fuel cell purchase cost, and solves the optimal control trajectory using computationally efficient multidimensional dynamic programming (EMDP). Comparative tests with traditional methods are conducted on a hardware-in-the-loop platform. The results show that the EMDP algorithm improves computation efficiency and the CMS strategy reduces operating costs and extends the lifetime of fuel cells.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Chemistry, Physical
Ahmed A. Kamel, Hegazy Rezk, Mohammad Ali Abdelkareem
Summary: A novel hybrid energy management system is designed in this paper to achieve the objectives of reduced hydrogen consumption and increased battery state of charge utilization in renewable hybrid power systems. The system combines PV, PEMFC, SC, and Battery, utilizing fuzzy logic and state machine control strategies to optimize energy management. The proposed HEMS achieves significant savings in hydrogen consumption and increase in SOC value compared to stand-alone strategies.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Business
Theodore Modis
Summary: Entropy always increases in a closed system, but complexity initially increases and then decreases as equilibrium is approached. A 20-year old study quantified complexity for the entire Universe and concluded that complexity will soon begin decreasing, a conclusion now supported by other researchers. Additionally, previous predictions about milestones have not been observed. The study's conclusion remains valid, predicting the next two milestones to occur around 2033 and 2078.
TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE
(2022)
Article
Chemistry, Analytical
Hesham Alhumade, Hegazy Rezk, Mohamed Louzazni, Iqbal Ahmed Moujdin, Saad Al-Shahrani
Summary: To address the slow response of a PEMFC to high load change, integrating the hybrid system with energy storage devices like battery storage and/or a supercapacitor is necessary. An energy management strategy (EMS) based on the white shark optimizer (WSO) has been developed for a photovoltaic/PEMFC/lithium-ion batteries/supercapacitors microgrid, aiming to minimize hydrogen consumption while ensuring optimal performance of each energy source. The proposed EMS-based-WSO outperforms other EMSs in terms of reduced hydrogen utilization and improved efficiency compared to state machine control strategy (SMCS), classical external energy maximization strategy (EEMS), and optimized EEMS-based particle swarm optimization (PSO).
Article
Agronomy
Seung-Hwan Go, Dong-Ho Lee, Sang-Il Na, Jong-Hwa Park
Summary: This study uses drones and sensors to estimate the growth stages and height variation of cabbage, and evaluates the impact of soil texture on cabbage growth. The logistic model is used to determine the four growth stages of cabbage and provides a new method to understand the characteristics and mechanisms of cabbage growth process.
Article
Business
Alain Debecker, Theodore Modis
Summary: The study found a negative correlation between the final ceiling of the logistic curve and its slope, indicating that flattening the curve may lead to an increase in infections, and early decisive responses are likely the optimal strategy among the countries studied.
TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE
(2021)
Article
Energy & Fuels
Zhenjun Lu, Qing Zhu, Weiguo Zhang, Huijie Lin
Summary: An economic operation strategy considering the uncertainty features of distributed PV output has been designed and applied on an integrated hydrogen energy system. The simulation tests validate that considering the influence of PV output uncertainty on hydrogen fuel cell output can make the system operation more reasonable.
Review
Chemistry, Physical
Babangida Modu, Md Pauzi Abdullah, Abba Lawan Bukar, Mukhtar Fatihu Hamza
Summary: Renewable energy systems (RESs) are crucial for meeting energy demand, and energy storage systems like batteries and hydrogen-based systems can address the issue of intermittent energy supply. This paper reviews recent advancements in hybrid RES with hydrogen storage, optimization methods, and energy management systems. It serves as a framework for researchers interested in investigating HRES with hydrogen storage.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Islam M. Abdelqawee, Ahmed W. Emam, Mohamed S. ElBages, Mohamed A. Ebrahim
Summary: This paper presents a fuel cell hybrid emergency system composed of fuel cells, batteries, and supercapacitors effective for different conveyance applications. The key factors of each energy management strategy (EMS) are reducing hydrogen consumption and prolonging power source lifetime. An incipient EMS based on an optimized proportional-integral (PI) controller is proposed to ensure the operation of the fuel cell stack within its maximum efficiency region. JSPSOBAT, a hybrid metaheuristic optimization technique, is used to tune the PI controller gains and achieve better performance compared to other EMS strategies.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Green & Sustainable Science & Technology
Alper Cicek
Summary: Nowadays, renewable energy sources (RESs) are becoming increasingly important in meeting the energy demand of residential and transportation sectors due to environmental concerns and the need for energy reliability. This study proposes a multi-objective stochastic optimum energy management model for a renewable-supported hydrogen-based community. The model utilizes a hydrogen energy system (HES) consisting of an electrolyzer, hydrogen tank, and fuel cell to provide energy to the community and fuel support for hydrogen fuel cell electric vehicles (HFCEVs). The effectiveness of the model is demonstrated through various case studies using real data from Spain, showing a 58.67% reduction in community cost.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Green & Sustainable Science & Technology
Junxing Liu, Chagshi Liu
Summary: This study developed a concise and integratable energy model of fuel cells, which can accurately predict the output voltage and calculate the energy density of fuel cells. The model also established quantitative correlations with the inherent characteristics of fuel cells and enables the interpolation and extrapolation of polarization curves that may not be attainable through direct experimentation.
Article
Energy & Fuels
Xiaolun Fang, Wei Dong, Yubin Wang, Qiang Yang
Summary: This paper proposes a multiple time-scale energy management solution for a hydrogen-based multienergy microgrid (MEMG) to supply electricity, hydrogen, and heating loads, aiming to minimize operational costs. The solution involves day-ahead energy scheduling and real-time energy dispatch using model predictive control (MPC), considering renewable energy generation and demand uncertainties. The solution is assessed through simulation experiments and outperforms the benchmark solution, reducing the mean daily operational costs by 37.08%.
Article
Environmental Studies
Md. Bokhtiar Hasan, Justyna Wieloch, Md. Sumon Ali, Sasa Zikovic, Gazi Salah Uddin
Summary: This study verifies the relationship between industrial growth and environmental sustainability, confirms the EKC hypothesis for the BRICS countries, and finds that fossil fuel consumption leads to environmental deterioration, while renewable energy consumption, financial development, and trade openness enhance environmental quality.
Review
Chemistry, Physical
Casper Boongaling Agaton, Kenneth Ian Talosig Batac, Edgar Medrano Reyes
Summary: The Philippines is exploring the prospects and challenges of green hydrogen production from renewable energy sources and proposes a roadmap for a green hydrogen economy by 2050. Green hydrogen, as a clean and sustainable energy carrier, can significantly reduce the country's dependence on imported fossil fuels and CO2 emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
