Review
Construction & Building Technology
Longlei Que, Xuelai Zhang, Jun Ji, Liqiang Gao, Wenhao Xie, Lu Liu, Xingjiang Ding
Summary: Phase change materials can effectively reduce energy consumption in lightweight buildings, but issues such as phase change hysteresis and supercooling during phase transition must be considered. Hysteresis temperature plays a vital role in improving the thermal performance of building envelopes when PCM is used, and incomplete phase transition hysteresis is more noticeable with large temperature fluctuations. Further research is needed to explore nucleation mechanisms and the impact of experimental conditions on hysteresis phenomena in PCM applications.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Maxime Thonon, Gilles Fraisse, Laurent Zalewski, Mickael Pailha
Summary: This study aims to analytically model the thermal behavior of a PCM experiencing supercooling and phase change hysteresis, for both complete and partial phase change cycles. The developed method relies on a heat source term to model the recalescence process during solidification.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Xue-Feng Shao, Sheng Yang, Jia-Cheng Lin, Hao-Ran Teng, Li-Wu Fan, Justin NingWei Chiu, Yan-Ping Yuan, Viktoria Martin
Summary: This study proposed a potential additive, polyvinylpyrrolidone (PVP), to reduce the supercooling effect of erythritol, a promising polyol PCM candidate. The addition of PVP significantly reduced the degree of supercooling and increased the retrievable latent heat during crystallization. Multiple tests confirmed the compatibility and long-term reliability of PVP-loaded erythritol composites.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Lida Yan, Joshua Charles, Carlos E. Romero, Sudhakar Neti, Ganesh Balasubramanian
Summary: This study examines the effect of hexahydrate strontium chloride on the supercooling and latent heat of calcium chloride hexahydrate based phase change material. The results show that the particle shapes and crystallographic phase of the additive are significant in suppressing supercooling, and an optimal 3 wt% of hexahydrate strontium chloride is identified for long-term nucleation performance.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Lida Yan, Joshua Charles, Carlos E. Romero, Sudhakar Neti, Ganesh Balasubramanian
Summary: This study examines the effects of strontium chloride hexahydrate as an additive to calcium chloride hexahydrate phase change material on supercooling and latent heat. The results show that optimizing the shape and crystallographic phase of the additive can significantly suppress supercooling and improve long-term nucleation performance of the PCM.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Arun Gopinathan, Jaroslav Jerz, Jaroslav Kovacik, Behzad Sadeghi, Pasquale Cavaliere
Summary: In this study, the thermophysical properties of coconut oil and RT28HC phase-change materials were analyzed using the T-history method. The experimental procedures standardized the method and allowed for the evaluation of thermophysical properties. The results showed that RT28HC had a higher latent heat storage capacity compared to coconut oil.
THERMOCHIMICA ACTA
(2023)
Article
Energy & Fuels
Chao Ma, Yongchao Wang, Shuai Xie, Jing Wang, Zhijiang Ji
Summary: The aim of this paper is to mitigate the supercooling of erythritol using organic salts as nucleating agents. The results show that calcium pimelate has a positive influence on eliminating the supercooling of erythritol and improves its crystallization kinetics and thermal conductivity. Therefore, it can be considered as a new material for waste heat recovery and solar energy heat collection.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Dwi Rahmalina, Reza Abdu Rahman, Ismail
Summary: The unstable phase transition of pure paraffin limits its application in active latent heat storage. This study shows that the addition of high-density polyethylene can decrease paraffin's leakage rate and increase its durability. The composite paraffin/HDPE material performs better than pure paraffin after thermal cycling treatment.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Longlei Que, Xuelai Zhang
Summary: Integrating hydrated salt phase change material into building envelopes is a promising method for achieving building energy saving. In this study, a novel form-stable composite phase change material with mesoporous silica encapsulating the salt was synthesized. The modified material exhibited good chemical compatibility, higher charge-discharge efficiency, and good thermal stability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Anna Zastawna-Rumin, Katarzyna Nowak
Summary: The study shows that neglecting the hysteresis effect in phase change materials can result in significant errors in calculations, especially in model buildings.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Songcen Shi, Renjie Liu, Nan Sheng, Chunyu Zhu, Zhonghao Rao
Summary: In this study, Al-25Si alloy was used as the phase change material (PCM) and Al2O3 nanoparticles were used as the matrix material to prepare a phase change composite (PCC). The as-prepared PCCs showed good thermal cycling stability and could be widely used in high-temperature energy storage.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Hakan Caliskan, Habib Gurbuz, Yasin Sohret, Durukan Ates
Summary: In this study, a building's boiler heating unit is used as a heat source for an economizer heat exchanger connected to a phase change material (PCM) latent heat storage unit-based heat exchanger for additional heating. The study found that during the melting process of the PCM, the heat flux increases and conduction-dominant heat transfer occurs. The flow velocities around the heat exchangers also increase, resulting in improved efficiency.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Haotian Huang, Jianhua Fan, Jianquan Lin, Qian Zhao, Yuyue Zhang, Yimin Xiao
Summary: This study used the implicit finite difference method to establish a two-dimensional PCM heat transfer model that considers the crystal growth process in detail. The results show that a large supercooling degree will accelerate the heat release rate of the PCM heat exchanger after the crystallization is triggered, while increasing the initial PCM temperature will reduce the sharp increase in the outlet temperature of the heat transfer fluid caused by crystallization.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Md Hasan Zahir, Mohammad Mominur Rahman, Salem K. S. Basamad, Khaled Own Mohaisen, Kashif Irshad, Mohammad Mizanur Rahman, Md Abdul Aziz, Amjad Ali, Mohammad M. Hossain
Summary: In this study, PEG-10MgCaCO(3) has been found to have the smallest particle size and a good porous structure, allowing for an impregnation rate of 69% of PEG and a high latent heat of 152.5 J/g, surpassing comparable materials.
Article
Thermodynamics
Mehdi Ghalambaz, Mutabe Aljaghtham, Ali J. Chamkha, Abdelkader Abdullah, Umar Alqsair, Mohammad Ghalambaz
Summary: A new design of fast charging latent heat thermal energy storage is proposed, which utilizes pressurized and heated liquid PCM to accelerate the charging process. Two layers of metal foam are added to further enhance the thermal charging process. The study investigates the impact of foam porosity, foam ratio, and layer placement on the design, and finds that high porosity metal foam can significantly reduce the charging time by forming a liquid PCM film between the inlet and outlet ports.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Yang Sui, Jiqiang Niu, Yanping Yuan, Qiujun Yu, Xiaoling Cao, Dan Wu, Xiaofeng Yang
Summary: Evacuated tube transportation is an important development direction for future high-speed transportation technology. This study investigates the aerothermal environment in the tube using a 2D axisymmetric model and DDES based on the SST kappa-omega turbulence model. The results show that the aerothermal environment is significantly affected by the blockage ratio, with the choking limit, shock wave, and Mach disk making the flow field more complicated.
JOURNAL OF THERMAL SCIENCE
(2022)
Article
Thermodynamics
Xiaoping Wu, Lingfei Qi, Tingsheng Zhang, Zutao Zhang, Yanping Yuan, Yujie Liu
Summary: This paper investigates a high-efficiency kinetic energy harvester based on railway Dowty Retarders, which can collect and store the kinetic energy of decelerating trains through four main components. Experimental and simulation approaches validate the potential and practicality of this mechanism for self-powered applications in heavy haul railways.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Review
Construction & Building Technology
Hanlin Li, Dan Wu, Yanping Yuan, Lijun Zuo
Summary: This study summarizes the daylight performance metrics of TDGSs and provides estimation methods for evaluating their suitability, focusing on their potential energy savings. It aims to assist building designers in creating healthy, comfortable, and energy-efficient indoor environments.
INDOOR AND BUILT ENVIRONMENT
(2022)
Article
Thermodynamics
Martin Zalesak, Pavel Charvat, Lubomir Klimes
Summary: Two metaheuristic optimization methods were employed to solve an inverse heat transfer problem involving a phase change material, identifying the relationship between effective heat capacity and temperature during melting and solidification. The study revealed significant asymmetry between the melting and solidification processes of PCMs, suggesting the existence of phase change hysteresis. The calculation procedure developed for the inverse problem proved robust and accurate, although slightly lower accuracy was observed in experimental data compared to pre-simulated data.
APPLIED THERMAL ENGINEERING
(2021)
Review
Thermodynamics
Mahmood Mastani Joybari, Hakon Selvnes, Alexis Sevault, Armin Hafner
Summary: Shell-and-tube heat exchangers have long been the industry's most common choice, but pillow-plate heat exchangers have gained a growing market share in recent years. This study aims to fill the literature gap by systematically and critically surveying earlier studies on pillow-plate heat exchangers and providing an in-depth discussion on the achievements so far.
APPLIED THERMAL ENGINEERING
(2022)
Article
Construction & Building Technology
Seyedehrabeeh Hosseinihaghighi, Karthik Panchabikesan, Sanam Dabirian, Jessica Webster, Mohamed Ouf, Ursula Eicker
Summary: There is a growing interest in energy mapping to accelerate GHG emissions reduction programs. This study aims to develop inputs for housing energy modeling and mapping using various data sources. A systematic workflow is presented to support housing energy simulations and municipal retrofit program planning. The study also provides recommendations for permit data collection and future research works.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Review
Thermodynamics
Zeng Chao, Yuan Yanping, Fariborz Haghighat, Karthik Panchabikesan, Mahmood Mastani Joybari, Cao Xiaoling, Lubomir Klimes
Summary: This review paper critically analyzes the recent literature on latent heat thermal energy storage systems in buildings, consolidating commercial software and in-built codes used for mathematical modeling. It also provides suggestions for future works to develop PCM-based thermal energy storage systems more effectively.
JOURNAL OF THERMAL SCIENCE
(2022)
Article
Construction & Building Technology
Shima Norouzi Kandelan, Mansour Yeganeh, Sareh Peyman, Karthik Panchabikesan, Ursula Eicker
Summary: Urban green spaces play a crucial role in controlling air quality, regulating outdoor thermal comfort, and improving human health. This study used ENVI-met simulations to generalize the results from street canyon configurations in nine cities worldwide and developed a quantitative model to predict ambient PM2.5 concentrations based on meteorological and built environment variables. The findings showed that green spaces and wind direction significantly correlated with air quality, and the optimized scenario could effectively decrease PM2.5 concentrations.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Construction & Building Technology
Soroush Samareh Abolhassani, Mahmood Mastani Joybari, Mirata Hosseini, Mojtaba Parsaee, Ursula Eicker
Summary: Global warming has significantly impacted communities, health, and infrastructure. Previous studies have shown that climate change leads to warmer temperatures, affecting the heating and cooling needs as well as thermal performance of buildings. Analyzing how buildings respond to climate change in terms of energy consumption is crucial for future energy planning and decision-making. However, the existing literature lacks a coherent approach, making it difficult to draw universal conclusions. This study introduces a step-by-step procedure to harmonize future research and guide building impact assessment under climate change.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Thermodynamics
Mahmood Mastani Joybari, Hakon Selvnes, Erling Vingelsgard, Alexis Sevault, Armin Hafner
Summary: This study conducted a parametric study on the design and operational parameters of an industrial-scale pillow plate heat exchanger with carbon dioxide. The results showed that the difference between refrigerant and carbon dioxide phase change temperatures and plate material had the highest significance on storage size and cost, while the refrigerant flow rate had the lowest significance.
APPLIED THERMAL ENGINEERING
(2023)
Article
Construction & Building Technology
Li Yang, Nan Zhang, Yanping Yuan, Fariborz Haghighat, Mohamed Dardir, Karthik Panchabikesan, Qinrong Sun
Summary: The influence of design parameters on the thermal performance of a double-glazed solar air-PCM collector is investigated, and the heat storage and release processes are studied under different design parameters using orthogonal tests. The results show that the heat storage process is mainly affected by the type of PCM, while the heat release process is affected by the air velocity of the air channel, length-width ratio of the collector, height of the air channel, and the type of PCM. Range and variance analysis are then applied to analyze the degree of influence of these factors on the outlet parameters and efficiencies of the collector, and an optimization scheme is obtained based on the degree of influence of each factor.
ENERGY AND BUILDINGS
(2023)
Review
Thermodynamics
Martin Zalesak, Lubomir Klimes, Pavel Charvat, Matous Cabalka, Jakub Kudela, Tomas Mauder
Summary: Heat transfer problems with unknown parameters require solutions to inverse heat transfer problems. Various methods and algorithms have been developed for this purpose, but current handbooks lack a comprehensive overview of advancements and applications. This review addresses this gap by providing a detailed overview of recent research and evaluating different methods and algorithms. The review aims to contribute to the field by presenting cutting-edge research and practical insights for researchers.
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.