Review
Energy & Fuels
Weiyi Liu, Yu Bie, Tao Xu, Andrzej Cichon, Grzegorz Krolczyk, Zhixiong Li
Summary: This paper summarizes the PCMs used in solar thermal utilization and their thermal physical parameters at different operating temperature ranges. It also introduces the thermal performance evaluation index of LHETS and reviews several methods for improving its performance. Additionally, the paper proposes some deeper problems and recommendations for future research.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Construction & Building Technology
Bowen Xu, Shilei Lu, Wei Jia, Haibing Du, Minchao Fan, Ran Wang
Summary: This paper focuses on the application of cascaded latent heat storage system for space heating, addressing the importance of charge-discharge cycle model and recommending the potential use of CLHSS instead of SLHSS under certain conditions.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Muhammad Shahid Shafiq, Muhammad Mahabat Khan, Muhammad Irfan
Summary: The study investigates the impact of various fin designs on the performance of a thermal energy storage unit. Different fin angles, shapes, and lengths can significantly affect the melting rate and energy storage efficiency of the phase change material. Optimal fin configurations can greatly enhance the overall performance of the system.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Review
Energy & Fuels
Yongliang Shen, Abdur Rehman Mazhar, Shuli Liu
Summary: This study reviewed literature on cascaded latent heat storage (CLHS) technology to analyze the research progress, challenges, and future directions. The results showed that the thermal advantages of CLHS can be further enhanced by optimizing the structure of the heat storage unit and the physical properties of the phase change material (PCM). The main challenges of this technology are the selection, development, and distribution of PCMs. Future research should focus on developing more accurate intelligent optimization algorithms and dynamic models, as well as studying practical applications in low-temperature thermal energy storage and cold storage.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Fan He, Renfei Bo, Chenxi Hu, Xi Meng, Weijun Gao
Summary: Adding metal fins can effectively improve the thermal conductivity of Phase-Change Material (PCM). The use of spiral fins is proposed to overcome the poor natural convection caused by annular fins. Experimental results show that employing spiral fins can enhance heat transfer performance, especially compared to annular fins.
Review
Green & Sustainable Science & Technology
Muhammad Aamer Hayat, Yong Chen, Mose Bevilacqua, Liang Li, Yongzhen Yang
Summary: The article discusses the current research on nano-enhanced phase change materials and the impact of nanofillers on their thermophysical properties. It also explores stability enhancement techniques, challenges, and applications of nano-PCMs.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Abdullah Naseer Mustapha, Helen Onyeaka, Osaze Omoregbe, Yulong Ding, Yongliang Li
Summary: Latent heat thermal energy storage is an efficient way of storing thermal energy to correct the imbalance between energy production and consumption. A combination of clusters, networks, and bibliometric analyses on an extensive dataset of publications revealed a surge in publications in the field from 2011-2019, coinciding with the passing of energy conservation legislations. China, USA, and Germany lead in total publications, while Turkey leads in average citation per document. The influence of government funding and foreign policy on research outputs of countries, regions, and institutions was also highlighted.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Hanqing Liu, Keyan Sun, Xiaoyu Shi, Huning Yang, Hongsheng Dong, Yan Kou, Pratteek Das, Zhong-Shuai Wu, Quan Shi
Summary: Two-dimensional materials are being extensively used to improve the performance of phase change materials, utilizing their high thermal conductivity and loading capacity to enhance thermal energy storage.
ENERGY STORAGE MATERIALS
(2021)
Review
Energy & Fuels
Abhishek Anand, Amritanshu Shukla, Hitesh Panchal, Atul Sharma
Summary: The integration of photovoltaic modules with building materials leads to a decrease in efficiency due to temperature rise. To manage this increase in temperature, various cooling technologies such as air cooling, water cooling, thermoelectric cooling, and phase change materials can be utilized. Research shows that passive cooling methods relying on convection are the simplest, while active water cooling is more effective but requires a constant supply of cold water.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Zhi Li, Yiji Lu, Rui Huang, Jinwei Chang, Xiaonan Yu, Ruicheng Jiang, Xiaoli Yu, Anthony Paul Roskilly
Summary: This article presents a comprehensive review of latent thermal energy storage technology, focusing on medium-high temperature phase change materials. The key points include insights into phase change materials, design of heat exchangers, and applications in various thermal sources such as solar energy and waste heat.
Article
Energy & Fuels
Muhammad Shahid Shafiq, Muhammad Mahabat Khan
Summary: This study focuses on numerically investigating the performance enhancement of a rectangular dual-wall-heated Latent Thermal Energy Storage Unit (LTESU) embedded with 12 horizontal fins. By optimizing the fin design, employing the enthalpy-porosity model for simulations, and studying different enclosure aspect ratios, the exponential fin configuration is found to be the most effective in improving the melting and energy storage performance of the phase change material.
JOURNAL OF ENERGY STORAGE
(2022)
Review
Energy & Fuels
Maoyong Zhi, Rong Fan, Xiong Yang, Lingling Zheng, Shan Yue, Quanyi Liu, Yuanhua He
Summary: With the shift towards new energy replacing traditional fossil fuels, PCM-based BTM has emerged as a crucial thermal management solution for lithium-ion batteries. PCM utilizes latent heat to enhance thermal management efficiency and properties, making it a better fit for battery thermal management systems.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Elli Kyriaki, Stefanos Stergiopoulos, Agis M. Papadopoulos
Summary: The efficiency of solar systems in buildings relies on energy storage. Traditional water storage is practical and cost-effective for small storage needs, but may be limited for larger storage capacity due to increased space requirements and thermal losses. New technologies like phase change materials (PCM) offer larger energy storage capacity and show promise in extending system autonomy.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Thermodynamics
Rohitash Kumar, Anju Nirwan, Bobin Mondal, Ravindra Kumar, Ambesh Dixit
Summary: By incorporating thermally expanded graphite into pentadecane, the thermal conductivity can be enhanced and the charging/discharging time can be reduced, making it a suitable phase change material for low-temperature thermal energy storage systems.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Review
Chemistry, Multidisciplinary
Joseph D. Williams, G. P. Peterson
Summary: Phase change materials (PCMs) have garnered increased interest for their ability to absorb and store large amounts of thermal energy with minimal temperature variations. Current studies primarily focus on enhancing thermal conductivity and reducing charging/discharging times, with limited exploration into increasing latent heat and stability. Recommendations for further research include better understanding stability, identifying factors with greatest impact, and determining PCM combinations for significant increases in latent heat.
Article
Energy & Fuels
Georg Scharinger-Urschitz, Heimo Walter, Markus Haider
Article
Energy & Fuels
Rene Hofmann, Verena Halmschlager, Martin Koller, Georg Scharinger-Urschitz, Felix Birkelbach, Heimo Walter
JOURNAL OF ENERGY STORAGE
(2019)
Article
Thermodynamics
Verena Sulzgruber, David Wuensch, Markus Haider, Heimo Walter
Article
Energy & Fuels
David Wuensch, Verena Sulzgruber, Markus Haider, Heimo Walter
Article
Energy & Fuels
Verena Sulzgruber, David Wuensch, Heimo Walter, Markus Haider
Article
Energy & Fuels
Verena Sulzgruber, Miriam Unterlass, Tobia Cavalli, Heimo Walter
Summary: This article presents a concept of micro encapsulated phase change material to improve the economic and technical aspects of high-temperature thermal energy storage. Through coating experiments and performance tests under different process conditions, the mechanical and thermal properties of the material are determined. Furthermore, a rough layout of a thermal energy storage system using the produced particles is presented and compared with a common sensible thermal energy storage.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Energy & Fuels
Stefan Thanheiser, Markus Haider, Paul Schwarzmayr
Summary: The sandTES technology uses a fluidized bed counter current heat exchanger for thermal energy storage applications, with a main feature of horizontal sand flow fluidized by vertical air flow for heat transfer. Research has shown that helically finned tubes in a transversal arrangement can significantly increase the heat transfer coefficient and are suitable for thermal energy storage, especially electro-thermal energy storage.
Article
Chemistry, Multidisciplinary
Lukas Kasper, Felix Birkelbach, Paul Schwarzmayr, Gernot Steindl, Daniel Ramsauer, Rene Hofmann
Summary: Digitalization and concepts like digital twins have great potential to improve efficiency in the energy sector, but there is currently a lack of standardized framework for implementing digital twins in industrial energy systems. This study proposes a platform based on a five-dimensional digital twin modeling concept that meets the requirements of industrial energy systems and addresses current technical implementation barriers.
APPLIED SCIENCES-BASEL
(2022)
Article
Energy & Fuels
Paul Schwarzmayr, Felix Birkelbach, Heimo Walter, Rene Hofmann
Summary: The waste heat potential from industrial processes is significant and can contribute to mitigating climate change. A packed bed thermal energy storage system is a low-cost technology that can store and utilize waste heat from industrial processes. By studying the standby mode characteristics, the efficiency of the system can be improved.
Article
Energy & Fuels
Lukas Kasper, Paul Schwarzmayr, Felix Birkelbach, Florian Javernik, Michael Schwaiger, Rene Hofmann
Summary: Renewable-dominated power grids require industry to adjust their processes according to energy availability. Digitalization offers new opportunities for optimization using mathematical methods like mixed-integer linear programming (MILP). The viability of MILP models relies on accurate behavior models, which can be improved with automation techniques such as digital twin (DT) platforms.
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.