Article
Green & Sustainable Science & Technology
Rahmat Khezri, Amin Mahmoudi, Mohammed Haque
Summary: This study proposes a novel demand side management approach to optimize the sizing of solar PV, wind turbine, and battery storage for a standalone household. By utilizing fuzzy logic and artificial neural network techniques, efficient load management and cost reduction in electricity are achieved.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2021)
Article
Energy & Fuels
Leandro L. O. Carralero, Hugo M. T. C. Gomes, Fabiano F. Costa, Filipe A. da C. Bahia, Antonio M. S. S. Andrade, Jose R. Pinheiro, Andre P. N. Tahim
Summary: This paper proposes a standalone photovoltaic-battery system (SBPS) that addresses the reliability, cost-effectiveness, safety, and battery life extension challenges in remote areas. By using a bidirectional low ripple current converter, the system improves maximum power point tracking performance and battery lifetime, while providing proper grounding and isolation.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Reza Hemmati, Hossien Faraji
Summary: This paper presents a novel control scheme for an AC/DC ring bus islanded microgrid, which effectively deals with unbalanced and non-linear loads. The proposed control strategy has several contributions including balancing unbalanced loads, compensating harmonics of non-linear loads, improving voltage stability and sag/swells, enabling partial operation under outages, and enhancing resilience.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Vipin Kumar, Sandip Ghosh, N. K. Swami Naidu, Shyam Kamal, R. K. Saket, S. K. Nagar
Summary: This paper presents a load voltage based MPPT technique using adaptive step-size for standalone PV systems, improving efficiency and convergence speed. The technique utilizes a single voltage sensor to measure load voltage and has been tested under different insolation conditions for validation.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Computer Science, Information Systems
Hashim Hasabelrasul, Zhenjiang Cai, Lei Sun, Xuesong Suo, Imad Matraji
Summary: Standalone solar PV systems are potential alternatives to solving electricity problems in areas without the grid. This paper presents a two-stage approach using a boost converter, inverter, and battery with a bidirectional converter. A novel virtual synchronous generator (VSG) controller is designed to adjust the inverter output and achieve maximum power from the PV scheme. The control strategy is evaluated and validated through extensive MATLAB simulations and console testing.
Article
Automation & Control Systems
Yuan Cheng, Bo Yu, Xuefan Wang
Summary: Differential modulation brushless doubly-fed machine (DMBDFM) achieves a smaller equivalent pole-pair number (PPN), expanding the operating range and application of brushless doubly-fed machine (BDFM). However, the existing BDFM theory cannot be directly applied to DMBDFM, and the design method for modulated rotor with different combinations of PPNs is incomplete. Therefore, this study designs a rotor winding of 3/2 pole pairs to achieve the highest natural synchronous speed (n(s)) of BDFM at power system frequency. A test prototype is developed and the validity of the rotor design scheme is verified through finite element simulation and test results.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Thermodynamics
Xiaotian Lai, Rui Long, Zhichun Liu, Wei Liu
Summary: The study proposes a self-diluted 2-stage reverse osmosis system to consume solar energy for fresh water production and stable salinity gradient energy. The impact of hydraulic pressure difference and diluted fraction ratio on water production and energy storage performance were investigated, leading to performance optimization and improved recovery ratio and energy efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Computer Science, Information Systems
Dong-Yang Sun, Zi-Jie Qian, Wen-Qiang Shen, Kai Zhou, Ning-Zhi Jin, Qing-Guo Chen
Summary: This paper investigates the power oscillation problem in grid-side converters of doubly-fed induction generators (DFIGs) under sub-synchronous oscillation (SSO). An improved phase-locked loop (PLL) and an adaptive quasi-resonant controller are proposed to eliminate the influence of SSO on the power oscillation. The effectiveness of the proposed strategies is verified through simulation and experimental results.
Review
Computer Science, Information Systems
Mohamed Abuagreb, Mohammed F. Allehyani, Brian K. Johnson
Summary: This paper discusses the challenges that renewable energy-based distributed generation poses to the stability of the grid, and introduces the concept of virtual synchronous generators (VSG) as a solution to address frequency and voltage issues. It reviews the fundamentals, different topologies, and the detailed structure of VSG, as well as emphasizing the VSG-based frequency control scheme in microgrid frequency regulation.
Article
Engineering, Multidisciplinary
Shatakshi Jha, Bhim Singh, Sukumar Mishra
Summary: This article discusses the challenges faced by a solar PV-diesel generator-battery storage (PV-DG-BS) based microgrid operating in standalone mode. It proposes a multi-objective and coordinated control system for converters to manage power, optimize the operation of the DG, and handle nonlinear loads. The control system also ensures that the total harmonic distortion of the DG current remains within the limits defined by the IEEE 519 standard. Additionally, it prevents the flow of negative sequence currents during unbalanced faults and regulates the state of charge of the battery storage to avoid overcharging or overdischarging.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Multidisciplinary Sciences
Endeshaw Alemu Bekele, Venkata Ramayya Ancha
Summary: The increasing global population, climate change effects, and decreasing fossil fuel reserves have resulted in higher demands for food, water, and energy. This study focuses on the performance of a solar dish concentrator coupled with a Stirling engine and thermoelectric generator for small-scale irrigation in Ethiopia. The findings demonstrate that utilizing solar thermal irrigation systems can contribute to food security and increase income for small farmers.
Article
Computer Science, Information Systems
Terapong Boonraksa, Watcharakorn Pinthurat, Pinit Wongdet, Promphak Boonraksa, Boonruang Marungsri, Branislav Hredzak
Summary: Recently, DC microgrid systems have been increasingly used to reduce fossil fuel consumption in electricity generation. Distributed generations, primarily DC sources, play an important role in efficient microgrid energy management. However, energy storage systems (ESSs) are currently not cost-effective in enhancing microgrid stability and reliability. This paper proposes an optimization method for a hybrid ESS, consisting of a battery and a supercapacitor, in a standalone DC microgrid. The optimization is achieved by calculating the cut-off frequency of a low-pass filter and using the Whale optimization algorithm. The results show that the hybrid ESS can reduce the total cost of the project by 12.01% compared to a battery-only microgrid system.
Article
Thermodynamics
Xueling Li, Renfu Li, Lin Hu, Shengjie Zhu, Yuanyuan Zhang, Xinguang Cui, Yichao Li
Summary: Sustainable energy supply is a major challenge for the lunar base, and a promising solution is to utilize lunar regolith heat storage. This study proposes a dish solar thermal power system with lunar regolith heat storage and investigates its performance in a lunar circadian cycle. The system gradually decreases in output power and efficiency during the lunar day and night, with average output powers of 10.8 kW and 7.0 kW, respectively, and a high energy efficiency of 48.0%. The study reveals the potential of the proposed system to continuously and efficiently supply energy to the lunar base, providing a scheme for the future lunar base's energy supply system.
Review
Energy & Fuels
Lilli Sophia Roeder, Arne Groengroeft, Marcus Grunewald, Julia Riese
Summary: To minimize emissions from biofuel production, renewable energy sources such as solar and wind can be used to reduce or replace fossil fuel consumption. Many processes used in biofuel plants are suitable for demand side management (DSM), which involves flexible power consumption. This study provides a comprehensive overview of DSM options in biofuel production, identifying process steps that can be operated flexibly and helping to identify technical limitations on overall process flexibility.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Murad Ali, Yu Haitao, Zhiyuan Che, Zakiud Din
Summary: The challenges of environmental change and greenhouse gas emissions reduction have led to the development of a power generation system combining Stirling engine and Stirling linear generator. This article proposes a new control strategy to optimize the system performance.
Article
Thermodynamics
Pengcheng Zhao, Jingang Wang, Liming Sun, Yun Li, Haiting Xia, Wei He
Summary: The production of green hydrogen through water electrolysis is crucial for renewable energy utilization and decarbonization. This research explores the optimal electrode configuration and system design of compactly-assembled industrial electrolyzer. The findings provide valuable insights for industrial application of water electrolysis equipment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
V. Baiju, P. Abhishek, S. Harikrishnan
Summary: Thermally driven adsorption desalination systems (ADS) have gained attention as an eco-friendly solution for water scarcity. However, they face challenges related to low water productivity and scalability. To overcome these challenges, integrating ADS with other desalination technologies can create a small-scale hybrid system. This study proposes integrating ADS with a Thermo Electric Dehumidification (TED) unit to enhance its performance.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
C. X. He, Y. H. Liu, X. Y. Huang, S. B. Wan, Q. Chen, J. Sun, T. S. Zhao
Summary: A decentralized centroid multi-path RC network model is constructed to improve the temperature prediction accuracy compared to traditional RC models. By incorporating multiple heat flow paths and decentralizing thermal capacity, a more accurate prediction is achieved.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chaoying Li, Meng Wang, Nana Li, Di Gu, Chao Yan, Dandan Yuan, Hong Jiang, Baohui Wang, Xirui Wang
Summary: There is an urgent need to shift away from heavy dependence on fossil fuels and embrace renewable energy sources, particularly in the energy-intensive oil refining process. This study presents an innovative concept called the Solar Oil Refinery, which applies solar energy in oil refining. A solar multi-energies-driven hybrid chemical oil refining system that utilizes solar pyrolysis and electrolysis has been developed, significantly improving solar utilization efficiency, cracking rate, and hydrogen yield.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chao Ma, Guanghui Wang, Dingbiao Wang, Xu Peng, Yushen Yang, Xinxin Liu, Chongrui Yang, Jiaheng Chen
Summary: This study proposes a bio-inspired fish-tail wind rotor to improve the wind power efficiency of the traditional Savonius rotor. Through transient simulations and orthogonal experiments, the key factors affecting the performance are identified. A response surface model is constructed to optimize the power coefficient, resulting in an improvement of 9.4% and 6.6% compared to the Savonius rotor.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sina Bahmanziari, Abbas-Ali Zamani
Summary: This paper proposes a new framework for improving electrical energy harvesting from piezoelectric smart tiles through a combination of magnetic plucking, mechanical impact, and mechanical vibration force mechanisms. Experimental results demonstrate a significant increase in energy yield and average energy harvesting time compared to other mechanisms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Nanjiang Dong, Tao Zhang, Rui Wang
Summary: This study establishes a multiobjective mixed-variable configuration optimization model for a comprehensive combined cooling, heating, and power energy system, and proposes an efficient generating operator to optimize this model. The experimental results show that the proposed algorithm performs better than other state-of-the-art algorithms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Ahmed E. Mansy, Eman A. El Desouky, Tarek H. Taha, M. A. Abu-Saied, Hamada El-Gendi, Ranya A. Amer, Zhen-Yu Tian
Summary: This study aims to convert office paper waste into bioethanol through a sustainable pathway. The results show that physiochemical and enzymatic hydrolysis of the waste can yield a high glucose concentration. The optimal conditions were determined using the Box-Behnken design, and a blended membrane was used for ethanol purification.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sven Klute, Marcus Budt, Mathias van Beek, Christian Doetsch
Summary: Heat pumps are crucial for decarbonizing heat supply, and steam generating heat pumps have the potential to decarbonize the industrial sector. This paper presents the current state, technical and economic data, and modeling principles of steam generating heat pumps.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Le Zhang, To-Hung Tsui, Yen Wah Tong, Pruk Aggarangsi, Ronghou Liu
Summary: This study investigates the effectiveness of a current-carrying-coil-based magnetic field in promoting anaerobic digestion of chicken manure. The results show that the applied magnetic field increases methane yield, decreases carbon dioxide production, and reduces the concentration of ammonia nitrogen. Microbial community analysis reveals the enrichment of certain methanogenic genera and enhanced metabolic pathways. Pilot-scale experiments confirm the technical effectiveness of the magnetic field assistance in enhancing anaerobic digestion of chicken manure.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Bo Chen, Ruiqing Ma, Yang Zhou, Rui Ma, Wentao Jiang, Fan Yang
Summary: This paper presents an advanced energy management strategy for fuel cell hybrid electric heavy-duty vehicles, focusing on speed planning and energy allocation. By utilizing predictive co-optimization control, this strategy ensures safe inter-vehicle distance and minimizes energy demand. Simulation results demonstrate the effectiveness of the proposed method in reducing fuel cell degradation cost and overall operation cost.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Fabio Fatigati, Roberto Cipollone
Summary: Organic Rankine Cycle-based microcogeneration systems that use solar sources to generate electricity and hot water can help reduce CO2 emissions in residential energy-intensive sectors. The adoption of a recuperative heat exchanger in these systems improves efficiency, reduces thermal power requirements, and saves on electricity costs.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Lipeng He, Renwen Liu, Xuejin Liu, Xiaotian Zheng, Limin Zhang, Jieqiong Lin
Summary: This research proposes a piezoelectric-electromagnetic hybrid energy harvester (PEHEH) for low-frequency wave motion and self-sensing wave environment monitoring. The PEHEH shows promising power output and the ability to self-power and self-sense the wave environment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Shangling Chu, Yang Liu, Zipeng Xu, Heng Zhang, Haiping Chen, Dan Gao
Summary: This paper studies a distributed energy system integrated with solar and natural gas, analyzes the impact of different parameters on its energy utilization and emissions reduction, and obtains the optimal solution through an optimization algorithm. The results show that compared to traditional separation production systems, this integrated system achieves higher energy utilization and greater reduction in carbon emissions.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Qingpu Li, Yaqi Ding, Guangming Chen, Yongmei Xuan, Neng Gao, Nian Li, Xinyue Hao
Summary: This paper proposes and studies a piston-type thermally-driven pump with a structure similar to a linear compressor, aiming to eliminate the high-quality energy consumption of existing pumps and replace mechanical pumps. The coupling mechanism of working fluid flow and element dimension is analyzed based on force analysis, and experimental data analysis is used to determine the pump operation stroke. Theoretical simulation is conducted to analyze the correlation mechanism of the piston assembly. The research shows that the thermally-driven pump can greatly reduce power consumption and has potential for industrial applications.
ENERGY CONVERSION AND MANAGEMENT
(2024)