Article
Green & Sustainable Science & Technology
Gurpreet Singh Sodhi, P. Muthukumar
Summary: This study presents a numerical model of a vertical shell and tube latent heat storage system, validated with experimental data, and analyzes the performance of single PCM and multiple PCM systems. The results show that the multi-PCM system has better charging and discharging performances compared to the single PCM system, with a significant improvement in specific power. By employing a compound enhancement technique, a reduction in charging and discharging time over the single PCM system is achieved.
Article
Energy & Fuels
Weimin Guo, Zhaoyu He, Ashmore Mawire, Peng Zhang
Summary: The study investigates the performance of a packed bed thermal energy storage (PBTES) system with cascaded phase change material (PCM) for waste heat recovery. A concentric dispersion model is developed and validated, finding that the volumetric ratio of hydroquinone: adipic acid: erythritol = 3:6:1 is the best configuration for the cyclic charging and discharging processes. The cascaded PBTES system achieves higher heat transfer rate compared to non-cascaded system, with an increase of 6.96% in average heat transfer rate for the volumetric ratio of 3:6:1.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
A. Sathishkumar, M. Cheralathan
Summary: The present study investigates the performance of a low-capacity energy storage tank filled with spherical capsules containing nano-enhanced phase change material (nano-PCM) under different heat transfer fluid (HTF) conditions. The study analyzes the influence of HTF inlet temperature and volumetric flow rates on the charging and discharging time of the energy storage tank. It also examines the reduction in charging and discharging time and the amount of latent heat energy stored. The study finds that the dispersion of functionalized graphene nano-platelets (f-GNP) reduces the specific energy consumption of the nano-PCM. Controlling the flow rate of HTF and its inlet temperature can achieve the desired output temperature and average melting rate in practical applications.
Article
Thermodynamics
P. McKenna, W. J. N. Turner, D. P. Finn
Summary: The study explores improving operational characteristics of buildings in a Mediterranean climate using phase change material thermal energy storage technology. Results show that partial charging and discharging can enhance energy performance, with further gains possible through control of fluid flow rates.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Jalal M. Jalil, Hussein S. Mahdi, Asim S. Allawy
Summary: The effects of using phase change material (PCM) on heat sink cooling performance were investigated in this study. The experiments showed that the use of PCM significantly reduced the temperatures of the heat sink. Additionally, the study found that adding nanoparticles to the PCM improved heat sink performance.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Rejane De Cesaro Oliveski, Alexandre de Quadro Tacques Filho, Ionatan Anton Schroer
Summary: There are many advantages to using thermal storage with phase change materials (PCM) and incorporating fins for heat transfer optimization. This study analyzes the effects of fin aspect ratio and positioning on the melting and solidification processes in a rectangular cavity. It was found that higher fin aspect ratios result in higher melting and solidification rates, especially in lower cavity positions.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Seyed Mohsen Hashem Zadeh, Maryam Ghodrat, Kasra Ayoubi Ayoubloo, Nima Sedaghatizadeh, Robert A. Taylor
Summary: This study numerically analysed the performance of a circular LHTES under partial charging/discharging modes, revealing the significant impact of the angle and thickness of metal foam sheets on the charging/discharging process. The configuration with maximum complete charging power may not exhibit the best performance during partial charging, and a Y-shaped design can achieve optimal performance by charging in the upright orientation and then rotating 60 degrees.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Atef Chibani, Slimane Merouani, Cherif Bougriou, Aissa Dehane
Summary: This study investigated the coupling of MH with PCM to ensure effective thermal management and reduce operating costs. The nano-PCM system efficiently recovers heat lost from exothermal reactions, but shows slightly reduced performance compared to pure paraffin. The position of PCM tubes plays a crucial role in melting rates.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
T. Amalesh, N. Lakshmi Narasimhan
Summary: Lithium-ion batteries require efficient thermal management systems for safe operation. Cooling methods such as liquid cooling and hybrid cooling have been proposed, but their suitability for fast charging lithium-ion batteries has not been explored. This study investigates the performance of liquid cooling and hybrid cooling methods and concludes that liquid cooling is more effective for cooling fast charging lithium-ion batteries.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Yang Zhang, BuGong Sun, XiaoBao Zheng, Pradeep Kumar Singh, Hamdi Ayed, Abir Mouldi, Abdullah Mohamed, Sadok Mehrez
Summary: This study investigates the effect of connection angle of L shaped fin on the melting and discharge process of a vertical PCM unit. The results show that selecting an appropriate connection angle can improve the performance of the thermal energy storage system by reducing the melting time and increasing the charging and discharging rates.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Detao Yu, Yan Qiu, Xiangmin Zhang
Summary: The addition of nanoparticles and fin to phase change material (PCM) enhances heat transfer by increasing the thermal conductivity of PCM and expanding the heat transfer area. In this study, a novel umbrella-like fin was designed, and nano-copper with different concentrations was added to PCM to further increase the discharge speed of the latent heat storage (LHS) system. The effect of nanoparticle concentration on PCM solidifying was studied through modeling and numerical simulation, showing that the addition of nanoparticles improves the cooling rate of PCM.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Moucun Yang, M. A. Moghimi, R. Loillier, C. N. Markides, M. Kadivar
Summary: This study focuses on the design of horizontal shell-and-tube PCM-based LHTES systems for solar domestic hot water applications. The findings showed that adjusting the tangential position of the heat transfer fluid tubes can greatly enhance the system's performance, while the effect of radial displacement is marginal.
Article
Chemistry, Physical
Filippo Agresti, David Cabaleiro, Laura Fedele, Stefano Rossi, Simona Barison
Summary: PCM emulsions or micro-nano-encapsulated into organic and inorganic shells have been studied to enhance the thermal capacity and efficiency of heat transfer liquids. In this work, RT21HC, a commercial PCM, was successfully nano-encapsulated into PMMA shells to obtain stable colloidal dispersions. The colloidal dispersions were characterized for microstructure, colloidal stability, rheological properties, heat capacity, and thermal diffusivity. The effect of incorporating nucleating agents into the nano-capsules to mitigate PCM crystallization supercooling was also investigated.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Thermodynamics
Liu Liu, Jing Li, Jianlei Niu, Jian-Yong Wu
Summary: PCM-in-water nano-emulsion prepared in this study showed high thermal storage capacity and energy releasing efficiency during charging and discharging processes. The flow rate of the emulsion significantly improved thermal storage performance, with volumetric thermal storage capacity during charging 50% higher than that of water, and rapid release of cooling energy during discharging process.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Zhiliang Huang, Huaixing Wang, Tongguang Yang, Shukun Liu, Hangyang Li, Jie Chen, Shengben Wu
Summary: This paper proposes an analytical thermal analysis approach for prismatic lithium cells considering dynamic non-uniform characteristics, addressing the efficiency and accuracy challenges in current models for energy storage applications. The proposed model and algorithm utilize a thermal circuit model and analytical differential equation group to calculate the dynamic temperature distribution. The experiments demonstrate millisecond-level computational cost and less than 3% calculation accuracy under various charge-discharge conditions. The parameter calibration, iteration mechanism, and reproducible codes enhance the engineering applicability of this approach, highlighting its excellent potential in battery thermal management for energy storage.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Haobin Liang, Jianlei Niu, Yixiang Gan
JOURNAL OF ENERGY STORAGE
(2020)
Article
Energy & Fuels
Haobin Liang, Liu Liu, Ziwen Zhong, Yixiang Gan, Jian-Yong Wu, Jianlei Niu
Summary: This study demonstrates a novel stratified storage tank of PCM-in-water nano-emulsion for cold storage in building radiant cooling applications, through experimental and numerical studies. The experimental results show that the cooling capacity of a cooling panel increases by 60% with phase change emulsion circulating in the loop, while the effective energy storage capacity of the stratified storage tank is 1.6-1.7 times that of water.
Article
Energy & Fuels
Haobin Liang, Jianlei Niu, Ratna Kumar Annabattula, K. S. Reddy, Ali Abbas, Minh Tri Luu, Yixiang Gan
Summary: This study analyzed the performance advantages of the packed bed PCM storage unit design and numerically investigated key geometric parameters. It was found that packed bed units have a larger surface-to-volume ratio and are advantageous in large-scale applications.
JOURNAL OF ENERGY STORAGE
(2022)
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.