Article
Energy & Fuels
Abhishek Saxena, Sanjeev Kumar Joshi, Parul Gupta, Vineet Tirth, Ajay Suryavanshi, Desh Bandhu Singh, Muneesh Sethi
Summary: Solar energy is an important and sustainable energy source used for heating and power production. This study experimentally examined three different sensible heat storage materials, including blackened pebbles, small pieces of masonry bricks, and small aluminium balls, for their thermal storage capacity in a hot box cooker. The results showed that using low-cost energy storage materials, especially for consumers in remote or rural areas, can significantly enhance the thermal efficiency of a box cooker.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Yuanhao Wu, Maji Luo, Sheng Chen, Weiguang Zhou, Yang Yu, Zijian Zhou
Summary: This study investigates the effects of mechanical vibration on the charging process of phase change materials in a latent heat thermal energy storage unit. It was found that mechanical vibration can significantly increase the charging rate of PCM, but the enhancement efficiency decreases as the amplitude and frequency increase. Increasing the amplitude or frequency alone can greatly reduce the total melting time of PCM.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Mao Qianjun, Li Ying, Zhang Yamei, Zhang Chunzhi
Summary: This study focuses on the heat transfer performance of a solar single-tank latent heat thermal energy storage system. Through numerical simulation, it was found that adjusting the aspect ratio of the tank can make heat transfer more uniform, increasing the liquid fraction. The research results will provide reference value for the optimization design of single-tank LHTES systems in the future.
JOURNAL OF THERMAL SCIENCE
(2021)
Article
Energy & Fuels
Cigdem Susantez
Summary: Through numerical investigation of two different phase change materials in various configurations, it was found that the LHTES unit with n-octadecane in configuration-1 completed phase change earliest and absorbed the most heat.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Devendra Raut, Saurabh Lanjewar, Vilas R. Kalamkar
Summary: This study investigates the effect of geometric and operating parameters on the charging of phase change material (PCM) in a vertical helical coiled latent heat storage (LHS) system. The results show that increasing the coil spacing and HTF inlet temperature can improve the charging process, while varying the HTF flow rate has no significant impact on the charging rate of the PCM.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Sunuk Kim, Han Jin Oh, Sang Ju Han, Han Seo Ko, Youhwan Shin, Dong Ho Shin
Summary: A new black-ice removal system using latent heat thermal energy storage (LHTES) with a solar thermal collector was introduced and tested in the field. The results showed that the system could completely melt a 1 cm thick black-ice sheet with an area of 0.4 m(2) within 2 hours.
Article
Energy & Fuels
Abed Mourad, Aissa Abderrahmane, Azher M. Abed, Davood Toghraie, Sameh E. Ahmed, Kamel Guedri, Mohammad Ali Fazilati, Riadh Marzouki, Obai Younis
Summary: This article examines the improvement of heat diffusion within wavy snowflake-shaped containers filled with nano-enhanced PCM. The study found that the melting process could be well controlled using a lattice of heated fins, and increasing the waviness parameter and nanoparticle volume fraction enhances the rates of heat transfer and average liquid fraction.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Anuwat Jirawattanapanit, Aissa Abderrahmane, Abe Mourad, Kamel Guedri, Obai Younis, Belgacem Bouallegue, Khanyaluck Subkrajang, Grienggrai Rajchakit, Nehad Ali Shah
Summary: Thermal energy storage using phase transition materials is a popular technology. This study focuses on improving the weak thermal conductivity of these materials by researching different thermal enhancement techniques. A numerical model is developed to investigate the effects of using fins and nano-enhanced phase change materials. The study finds that using nano-enhanced phase change materials can significantly reduce the time required for total melting in a thermal energy storage system.
Article
Energy & Fuels
Amit Kumar, Prashant Verma, L. Varshney
Summary: The study demonstrates that configuring the outer shell of a circular latent heat thermal energy storage unit into a semi-circular shape can enhance the melting rate of phase change materials. The semi-circular heat storage unit shows better melting performance compared to the circular one, melting the phase change material in almost half the time. Additionally, the thermal energy storage rate and total stored energy are higher in the semi-circular latent heat thermal energy storage system compared to the circular one.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Nidhal Ben Khedher, Rashad A. Bantan, Lioua Kolsi, Mohamed Omri
Summary: This paper investigates the performance of a heat storage device using Nano-Enhanced PCM and finned structure through experimental and numerical simulations. The results show that NEPCM significantly improves the charging and discharging rates of the heat storage device, and the addition of inner and outer longitudinal fins further enhances the performance. Using 2% Al2O3 nanoparticles can achieve nearly the same results as using 1% CNT, and is more cost-effective.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Hesam Ami Ahmadi, Nazanin Variji, Amirreza Kaabinejadian, Mahdi Moghimi, Majid Siavashi
Summary: This study proposes the use of gradient metal foams to optimize phase change materials and achieve higher efficiency in thermal energy storage units. Numerical simulations were conducted to investigate the impact of gradient porosity on the performance of TES, resulting in improvements in charging time and total entropy generation.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
Jialing Li, Zuhair R. Abdulghani, Mohammed N. Alghamdi, Kamal Sharma, Hakeem Niyas, Hazim Moria, Akbar Arsalanloo
Summary: In this study, the performance enhancement of a shell and tube latent heat thermal energy storage (LHTES) system using twisted fins was assessed. The results showed that the triple fin in vertical orientation and double fin in horizontal orientation had the best effect on melting enhancement and exergy efficiency of the phase change material.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Evdoxia Paroutoglou, Peter Fojan, Leonid Gurevich, Simon Furbo, Jianhua Fan, Marc Medrano, Alireza Afshari
Summary: Latent heat thermal energy storage with Phase Change Materials (PCM) is a promising option for Thermal Energy Storage (TES) applications. This study developed a tubular encapsulation model and conducted a parametric analysis to optimize the system geometry and investigate the influence of internal and external fins on thermal conductivity. The results also showed that using PCM organic paraffin RT18 encapsulated in electrospun fiber matrices enabled rapid phase change processes.
Article
Thermodynamics
Jose Miguel Maldonado, David Verez, Alvaro de Gracia, Luisa F. Cabeza
Summary: This study experimentally evaluated the implementation of heat pipes in latent heat thermal energy storage systems. The results showed that heat pipe systems have faster heat transfer rates during charging processes compared to shell and tubes systems, but the low conductivity of the storing material cushioned the high heat transfer rates.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Hicham El Mghari, Abdellah Idrissi, Rachid El Amraoui
Summary: This study investigates the efficiency of the charging mechanism and heat transfer characteristics of a three-stage cascaded latent heat thermal energy storage unit (LHTES) with longitudinal fins using CFD simulation. The results show that the cascaded LHTES with fins has reduced melting time and improved energy storage efficiency compared to other setups.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
M. C. Rodriguez-Hidalgo, P. A. Rodriguez-Aumente, A. Lecuona-Neumann, M. Legrand
APPLIED THERMAL ENGINEERING
(2019)
Article
Thermodynamics
Mathieu Legrand, Luis Miguel Rodriguez-Anton, Carmen Martinez-Arevalo, Fernando Gutierrez-Martin
Article
Chemistry, Multidisciplinary
Gabriel Camporredondo, Ramon Barber, Mathieu Legrand, Lourdes Munoz
APPLIED SCIENCES-BASEL
(2019)
Article
Thermodynamics
Antonio Famiglietti, Antonio Lecuona-Neumann, Jose Nogueira, Mohammad Rahjoo
APPLIED THERMAL ENGINEERING
(2020)
Article
Engineering, Mechanical
Jose Nogueira, Mathieu Legrand, Roberto Jimenez, Fabrizio De Gregorio
Summary: This study provides a fully analytic modeling of peak-locking error, allowing for measurement correction. By calibrating a few coefficients, most of the peak-locking error can be corrected with higher accuracy. The method shows good error prediction accuracy in turbulent flow experiments.
EXPERIMENTS IN FLUIDS
(2021)
Article
Energy & Fuels
Antonio Lecuona, Jose I. Nogueira, Antonio Famiglietti
Summary: An improved thermodynamic open Dual cycle is proposed for simulating the working of internal combustion engines, including composition change, temperature excursions, combustion efficiency, heat and pressure losses, and intake valve timing. The simplified model provides gas properties and trapped mass in the cylinder, yielding explicit equations for cycle work and efficiency, including exhaust temperature for turbocharging. It covers Atkinson and Miller cycles, includes irreversibilities, and incorporates high-efficiency and low-polluting technologies.
Article
Thermodynamics
Antonio Famiglietti, Antonio Lecuona, Mercedes Ibarra, Javier Roa
Summary: The study examines an innovative concentrating solar thermal system for the direct production of hot air for industrial applications. By utilizing linear Fresnel collectors and matching them with automotive turbochargers, the system successfully avoids auxiliary energy consumption and provides a stable output of hot air.
Article
Green & Sustainable Science & Technology
Antonio Famiglietti, Antonio Lecuona
Summary: Linear Fresnel collectors show great potential for producing solar heat for industrial processes on both small and large scales. Direct air heating inside the collectors can simplify processes, reduce costs, and offer environmental and safety benefits.
Article
Thermodynamics
Antonio Famiglietti, Antonio Lecuona
Summary: Efforts are being made to replace fossil fuels with renewable energy sources in industry, and solar air heaters and Linear Fresnel collectors offer potential for heat production in the low to medium temperature range. These technologies reduce energy consumption and costs in industry.
APPLIED THERMAL ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Jose Nogueira, Mathieu Legrand, Roberto Jimenez, Fabrizio De Gregorio
Summary: This study introduces an analytic model for calibrating particle image velocimetry setups, which can significantly improve measurement errors through the use of multiple Δt strategies. The research demonstrates that the model, based on a robust theoretical foundation, offers greater advantages compared to previous empirical models.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2021)
Article
Thermodynamics
Mathieu Legrand, Raul Labajo-Hurtado, Luis Miguel Rodriguez-Anton, Yolanda Doce
Summary: The large-scale deployment of photovoltaic power planned in Spain by 2030 will have a significant impact on electricity prices. Energy storage is likely necessary to manage the increasing share of intermittent renewable energy and ensure grid balance and electricity supply security. Techno-economic analysis reveals potential benefits and challenges associated with different storage options, such as Liquid Air Energy Storage plants.
Article
Green & Sustainable Science & Technology
Carmen Mata, Dolores Cardenas, Claudia Esarte, Jose A. Soriano, Arantzazu Gomez, Pablo Fernandez-Yanez, Reyes Garcia-Contreras, Luis Sanchez, Jose Nogueira, Octavio Armas
Summary: Renewable liquid fuels show promise as a solution for reducing carbon emissions in the transport sector. However, the impact of these fuels on local pollutants and air quality needs to be carefully analyzed. This study examines the performance and emissions of a hybrid bus using conventional diesel and renewable fuel under urban driving conditions. Results show that the renewable fuel leads to lower CO2 emissions, fuel consumption, and emissions of CO, THC, and NOx. The findings suggest that renewable fuels can be used as a substitute for diesel fuel with reduced emissions in most conditions.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Energy & Fuels
Antonio Lecuona-Neumann, Antonio Famiglietti
Summary: Parabolic trough collectors and linear Fresnel collectors are well-established technologies for power production and are now being used to provide solar heat for industrial needs. Traditionally, these technologies rely on liquids as heat transfer fluids, but there have been concerns about their technical limitations and environmental impact, leading to research on alternative solutions. This review examines the use of gases as heat transfer fluids in linear concentrating collectors and highlights their potential applications and technical challenges. The findings indicate that gases have the potential to replace liquids, but further research and development are needed to determine the best technical compromises for practical implementation in different sectors.
WILEY INTERDISCIPLINARY REVIEWS-ENERGY AND ENVIRONMENT
(2023)
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.
