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
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
Qinglin Li, Xiaodong Ma, Xiaoyu Zhang, Jiqiang Ma, Jiaolong Liu, Xiaowu Hu, Yefeng Lan
Summary: The improvement of micro-en-capsulated phase change materials (MEPCMs) through a three-step process has been shown to enhance thermal stability by forming a dense and durable Al2O3 shell, resulting in excellent heat storage capacity. By adjusting the amount of Al(OH)3 in the precipitation treatment, the thickness of the Al2O3 shell layer can be controlled, contributing to the high thermal durability and cycling stability of the MEPCMs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Physical
Dian-ce Gao, Yongjun Sun, Alan M. L. Fong, Xiaobin Gu
Summary: This review provides an overview of using minerals to encapsulate phase change materials (PCM) and analyzes the mechanisms and methods for improving the thermal performance of mineral-based functional solid-liquid phase change materials (FSPCM). It also presents the practical applications and discusses the future developments of mineral-based FSPCMs. This study is important for improving encapsulation techniques, enhancing thermal performance, and promoting practical applications.
ENERGY STORAGE MATERIALS
(2022)
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)
Article
Chemistry, Multidisciplinary
David Verez, Emiliano Borri, Alicia Crespo, Boniface Dominick Mselle, Alvaro de Gracia, Gabriel Zsembinszki, Luisa F. Cabeza
Summary: Thinner storage slabs can achieve higher power output and reduce charging/discharging time. The variation in heat transfer fluid flow rate has a greater impact on temperature distribution and energy efficiency when thicker slabs are used. The macro-encapsulation design does not significantly affect the discharging efficiency of the tank, which was around 85% in this study.
APPLIED SCIENCES-BASEL
(2021)
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
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
Chemistry, Physical
Paula F. De Castro, Sergiy Minko, Vladimir Vinokurov, Kirill Cherednichenko, Dmitry G. Shchukin
Summary: Microcapsules loaded with n-docosane as phase change material have been successfully used to impregnate cotton fabrics, providing temperature buffering and increase effects during heating and cooling processes. The impregnated fabrics maintained stable performance even after long-term storage, demonstrating high potential for commercial applications in thermal management.
ACS APPLIED ENERGY MATERIALS
(2021)
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)
Article
Engineering, Environmental
Nan Sheng, Jiahui Lu, Jingdong Hu, Ruijie Zhu, Laras Fadillah, Cheng Wang, Chunyu Zhu, Zhonghao Rao, Hiroki Habazaki
Summary: Metallic Sn microcapsules coated with a stable SnO2 shell have been developed for medium-temperature thermal energy storage, demonstrating high melting point, latent heat, and excellent thermal cycling stability.
CHEMICAL ENGINEERING JOURNAL
(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)
Article
Thermodynamics
Ankur Jain, Mohammad Parhizi
Summary: This paper presents a theoretical analysis of phase change heat transfer in a spherical PCM with an encapsulant layer, considering the effect of thermal contact resistance. The results show that the model accurately describes the phase change heat transfer process and agrees well with numerical simulations. The study analyzes the influence of encapsulant thickness, thermal properties, and thermal contact resistance on phase change propagation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Chemistry, Physical
Yaxi Li, Chuanchang Li, Niangzhi Lin, Baoshan Xie, Dongyao Zhang, Jian Chen
Summary: The development of phase change energy storage technology, with hydrated salt as the core material, has brought attention to its applications in green buildings. However, controlling the phase transition of hydrated salt to optimize its performance remains a challenge. The methods and applications of hydrated salt in energy storage systems are being explored for further development.
MATERIALS TODAY ENERGY
(2021)
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.