Article
Thermodynamics
S. Vannerem, P. Neveu, Q. Falcoz
Summary: In this study, the performance of a dual-media thermocline storage was investigated in stationary periodic operation. The numerical results were compared to experimental results and showed good agreement. The utilisation rate decreased while the exergy efficiency increased over the cycles. Furthermore, a new indicator, V's, was introduced to quantify the exergy losses. The experimental validation of the thermocline storage showed satisfying performance with a rating of 9 out of 10.
Article
Green & Sustainable Science & Technology
S. Vannerem, P. Neveu, Q. Falcoz
Summary: Thermocline storage performance was studied using a numerical model and validated with experimental results, showing the impact of interstitial fluid velocity on storage performance. Numerical simulations revealed an optimal velocity, while experiments demonstrated a decrease in storage performance at lower and higher velocities.
Article
Green & Sustainable Science & Technology
Om Prakash, Anil Kumar, Samsher, Kumaresh Dey, Ankish Amu
Summary: This research discusses the exergy and energy analysis of a innovative solar air heater with sensible heat storage. The experiments and performance analysis show that the system operated under induced forced convection mode with a reflector has the best heat performance, making it highly suitable for low-temperature applications.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Q. Falcoz, S. Vannerem, P. Neveu
Summary: The influence of fluid distribution on packed bed thermocline storage is minimal. The packed bed quickly homogenizes radial temperature, and different distributors have little effect on the longitudinal temperature profiles.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Baoshan Xie, Nicolas Baudin, Jerome Soto, Yilin Fan, Lingai Luo
Summary: This study investigates the impact of inlet configuration and insulation on the thermocline expansion in a lab-scale thermal energy storage tank. The results show that injecting flow causes temperature non-uniformity and thermocline expansion at the near-entrance region of the tank, but has limited effect on the overall performance. Good insulation reduces thermocline thickness and improves energy efficiency and capacity ratio.
Review
Energy & Fuels
Krishna J. Khatod, Vikrant P. Katekar, Sandip S. Deshmukh
Summary: This article reviews the optimal selection of sensible heat storage materials in solar stills, and finds that copper oxide nano-coated absorber plate and Kanchey marbles can significantly increase the productivity of solar stills.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Aswin Karthik, P. Muthukumar
Summary: This study presents the development and performance analysis of a concrete based thermal energy storage module using fins to enhance heat transfer rate. Numerical simulations were conducted to study the thermal performance of the module with varying design parameters. The results show that the models with fins have reduced charging/discharging times and increased heat storage/retrieval rate compared to the model without fins. Additionally, using a trapezoidal fin shape can significantly reduce material usage without compromising thermal performance.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Review
Energy & Fuels
Tawfiq Chekifi, Moustafa Boukraa
Summary: Sensible heat thermal storage systems offer a simple, cost-effective, and easy-to-control solution for energy storage by adding or removing heat in a medium. Computational Fluid Dynamics (CFD) is a powerful tool to simulate heat flow and transfer within these systems, allowing for optimization of design and material selection. This paper provides an overview of the use of CFD in thermal sensible storage, highlighting its advantages and suggesting areas for future research.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Tohru Suwa
Summary: A machine learning technique is developed to predict the transient heat transfer performance of sensible heat storage in solar thermal systems. Regression models trained using weather data from different locations demonstrate high prediction accuracy and applicability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Kadir Bakirci, Bedri Yuksel
Summary: A simulation study of the solar-source heat pump system was conducted, investigating the performance of the designed system both experimentally and theoretically. The developed model corresponded well with the experimental data, with differences in performance values being around 8% and 5% for COP and COPS, respectively.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Dounia Chaatouf, Mourad Salhi, Benyounes Raillani, Samir Amraqui, Ahmed Mezrhab, Hassane Naji
Summary: The non-continuity of the drying process after sunset is a significant limitation in solar dryers. To overcome this, a Thermal Energy Storage (TES) unit was installed in an indirect solar dryer in eastern Morocco. With the use of Computational Fluid Dynamics (CFD) simulations, the study showed that the solar dryer with sensible heat storage improved efficiency by approximately 2.47% at night.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
G. Canneto, A. C. Tizzoni, S. Sau, E. Mansi, W. Gaggioli, A. Spadoni, N. Corsaro, M. Capocelli, G. Caputo, F. Galindo, A. Della Libera
Summary: Parabolic trough CSP plants are a promising renewable energy source that can be integrated with TES systems to address electricity generation intermittency. Current storage systems use molten nitrates in two tanks, but single tank configurations have been proposed for cost reduction and manageability improvement. This study investigates the storage performance of ternary and quaternary mixtures proposed in the IN POWER project. Experimental data on the thermo-physical properties of the fluids were used to model the discharge phase in a thermocline tank. The results show that, compared to solar salt and Hitec XL, the ternary and quaternary mixtures have longer discharging times.
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME
(2023)
Article
Energy & Fuels
T. Lucio-Martin, M. Martin, L. Guerreiro, R. S. Villardon, J. Lopez, M. C. Alonso
Summary: Several studies suggest that thermocline molten salt tanks are suitable for thermal energy storage systems, but there is a lack of experimental investigations. This research aims to build and assess a hybrid tank section operating as a thermocline tank, made of a thick concrete layer and a thin steel liner. The performance of the tank section is evaluated during commissioning and operation, showing the thermal appropriateness of using concrete and the presence of a heat convection current with energy gradients.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Andrea Frazzica, Marco Manzan, Valeria Palomba, Vincenza Brancato, Angelo Freni, Amedeo Pezzi, Bianca M. Vaglieco
Summary: This study presents the development and testing of a hybrid thermal energy storage system that utilizes phase change material as the storage medium, increasing the energy storage density. Two numerical models were also developed for design and optimization of the system.
Article
Green & Sustainable Science & Technology
Philip Ingenhoven, Leok Lee, Woei Saw, Muhammad Mujahid Rafique, Daniel Potter, Graham J. Nathan
Summary: The need for economically viable high-temperature heat sources with no net CO2 emissions for industrial chemical processes has become a global priority. Concentrated solar thermal heat generation has the potential to meet this challenge, as demonstrated by a detailed techno-economic analysis of a concentrated solar thermal plant. The analysis revealed the importance of optimizing the interplay between the solar concentration subsystem and the storage system to achieve the best annual energetic performance.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Construction & Building Technology
Carlo Cravero, Davide Marsano
Summary: The study focuses on the mechanism of COVID-19 contagion and simulates the dispersion of saliva droplets. The simulation takes into account the air conditioning system and the impact of different conditions on aerosol diffusion. The research results can support management strategies for indoor occupation.
INDOOR AND BUILT ENVIRONMENT
(2022)
Article
Thermodynamics
Abdul Basit, Mariam Mahmood, Adeel Waqas, Majid Ali, Waqas Khalid
Summary: With increasing demand for clean and energy-efficient air conditioning systems, the study combines a commercial desiccant dehumidifier with an experimentally developed direct evaporative cooling (DEC) system to achieve human thermal comfort level. Experimental analysis shows that the system can provide human comfort level for a range of temperature and relative humidity, but the overall power consumption increases when a commercial desiccant dehumidifier is used to achieve thermal comfort at higher humidity levels. Coefficient of performance (CoP) and energy efficiency ratio (EER) are used to analyze system performance.
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2022)
Article
Thermodynamics
Muhammad Reshaeel, Adeel Javed, Ahmad Jamil, Majid Ali, Mariam Mahmood, Adeel Waqas
Summary: The study focuses on optimizing the configuration of an organic Rankine cycle for waste heat recovery. The results show that the double stage reheated organic Rankine cycle outperforms other configurations and leads to an increase in power output and improved efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Mechanical
Avinash Renuke, Federico Reggio, Alberto Traverso, Matteo Pascenti
Summary: This article presents a systematic experimental characterization of loss mechanisms in a 3 kW Tesla expander, providing insights into the reasons for its low performance and identifying key areas for improvement, paving the way for the development of next-generation Tesla turbines that can compete with state-of-the-art bladed expanders.
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
(2022)
Article
Energy & Fuels
Carlo Cravero, Philippe Joe Leutcha, Davide Marsano
Summary: The design features of a centrifugal compressor must ensure high performance and a wide operating range. The ported shroud is a passive flow control device that recirculates flow to avoid blade passage blocking. Using CFD simulations and a stability criterion, it is confirmed that the ported shroud can effectively extend the operating range.
Article
Energy & Fuels
Carlo Cravero, Davide Marsano
Summary: The braking system of a racing car is a major design challenge. This study analyzes the flow around and inside the wheel of an F1 car with the braking system components to evaluate heat transfer after braking events. Using an actual geometry of an early 2000s F1 car, the braking system is simulated with a CFD approach. Different heat transfer phenomena are progressively added to the model to understand their effects. The study also investigates the influence of ambient pressure at different altitudes on heat transfer from braking events.
Article
Engineering, Multidisciplinary
Muhammad Naveed Arif, Adeel Waqas, Faaz Ahmed Butt, Mariam Mahmood, Asif Hussain Khoja, Majid Ali, Kafait Ullah, M. A. Mujtaba, M. A. Kalam
Summary: This study examines the feasibility of using solar water heating (SWH) systems for sustainable tourism in Gilgit-Baltistan (GB) of Pakistan. Three types of solar collectors were evaluated, and the evacuated tube collectors (ETC) showed the highest solar fraction and efficiency. The study concluded that ETC is the most feasible SWH system for the northern regions of Pakistan based on techno-economic analysis.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Muhammad Shoaib, Sheher Yar Khan, Naveed Ahmed, Mariam Mahmood, Adeel Waqas, Mumtaz A. Qaisrani, Nadia Shehzad
Summary: This research aims to improve the performance of a photovoltaic module by attaching a novel heat sink to its rear side. The proposed heat sink consists of drilled cylindrical rods with fins filled with a phase change material. Experimental and numerical simulations show that the modified module has reduced temperature, increased output voltage, and improved PV-PCM efficiency. Additionally, parametric sensitivity analysis reveals the impact of wind speed and incidence angle on the modified module's performance.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Hafiz Muhammad Ushamah, Naveed Ahmed, K. E. Elfeky, Mariam Mahmood, Mumtaz A. Qaisrani, Adeel Waqas, Qian Zhang
Summary: This study analyzed and compared the thermo-economic performance of solar hybrid district heating systems integrated with borehole TES systems in different climate zones in Pakistan, and identified the most suitable solar thermal collector technology.
Article
Energy & Fuels
Carlo Cravero, Davide De Domenico, Davide Marsano
Summary: This study applies uncertainty quantification methods to simulate the propagation of exhaust gas from a cooling tower, and compares the results of two different methods to assess their respective advantages and disadvantages.
Article
Energy & Fuels
Carlo Cravero, Davide Marsano
Summary: In this study, a computational fluid dynamics (CFD) model is developed to simulate the convective flow movements within the molten glass bath of a glass production furnace. The model incorporates a heat flux profile to simulate the combustion process and variable thermophysical properties of the glass based on its chemical composition. The model is validated and used to analyze different heat flux profiles and their effects on the glass flow structure. The results show that a specific heat distribution generates two convective macro-cells, essential for glass melting and homogenization, while a portion of the flow exits directly from the furnace exit port, leading to a low-quality product.
Article
Energy & Fuels
Zohaib Hassan, Mariam Mahmood, Naveed Ahmed, Muhammad H. Saeed, Rashid Khan, Muhammad Mujtaba Abbas, Md Abul Kalam, Fares Almomani, Emad Abdelsalam
Summary: In the industrial sector, integrating renewable sources with conventional fuels is crucial for bridging the energy gap caused by the significant share of final energy consumption from hot water applications. This paper presents the performance analysis of a solar water heating system based on an evacuated flat-plate collector, demonstrating its capability to accurately predict system performance. The analysis includes numerical modeling, experimental validation, and simulation of the effect of design parameters, as well as an economic analysis for a textile industry.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Physics, Fluids & Plasmas
Carlo Cravero, Davide De Domenico, Davide Marsano
Summary: The reduction in energy consumption and emissions is a strategic challenge for industries, particularly the glass industry with its high energy demand and NOx emissions. The air staging system, which involves injecting air into the regenerative chamber to reduce NOx emissions, is a commonly used emission abatement system. This study uses CFD and data analysis techniques to design and manage a hybrid air staging system in the glass industry.
Article
Energy & Fuels
Asad Ullah, Mariam Mahmood, Sheeraz Iqbal, Muhammad Bilal Sajid, Zohaib Hassan, Kareem M. AboRas, Hossam Kotb, Mokhtar Shouran, Bdereddin Abdul Samad
Summary: This study compares concentrated solar power (CSP) and photovoltaic (PV) power in terms of technical, economic, and environmental aspects. The results show that CSP is more viable both technically and economically, while PV performs better in economic terms.
Article
Physics, Fluids & Plasmas
Carlo Cravero, Davide Marsano
Summary: In this paper, CFD techniques were used to analyze the flow around race car wheels, validated the CFD method for isolated wheel case, and studied the interaction between tire grooves and the front wing of an F1 car.
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.
