Article
Construction & Building Technology
Shufan Yang, Yuxuan Zhang, Yongling Zhao, Juan F. Torres, Xiaolin Wang
Summary: Passive cooling using phase change materials (PCMs) is a promising technique to stabilize indoor air temperature and reduce building energy demand. This study investigates the phase change behavior and thermal performance of PCM ceiling panels with different geometries. The results show that the pyramid array panel performs better than the tetrahedral-based panel, and hanging the panel enhances heat transfer compared to direct attachment to the ceiling.
ENERGY AND BUILDINGS
(2023)
Article
Engineering, Environmental
Lu-Yao Yang, Chang-Ping Feng, Lu Bai, Rui-Ying Bao, Zheng-Ying Liu, Ming-Bo Yang, Wei Yang
Summary: The study fabricated flexible shape-stabilized phase change materials (PCMs) with excellent thermal management capability, showing great potential in practical applications for decreasing temperatures of electronic devices and buildings.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Construction & Building Technology
Jonathan Dallaire, Hafiz Muhammad Adeel Hassan, Jesper Holm Bjernemose, Mads Peter Rudolph Hansen, Ivar Lund, Christian T. Veje
Summary: This paper presents experimental investigations of a dual-stack latent thermal energy storage system for cooling applications in buildings. The results show that the pressure distribution is relatively uniform within the inlet and outlet pressure chambers. The design using two PCM stacks achieved high heat storage effectiveness.
BUILDING AND ENVIRONMENT
(2022)
Review
Construction & Building Technology
Chaoen Li, Xiaodong Wen, Wei Cai, Hang Yu, Dongjing Liu
Summary: This paper summarizes the main characteristics of phase change materials (PCMs) in building envelopes and comprehensively discusses the design and shape stabilization methods of composite PCMs. The methods to address season adaptable problems and the test and heat transfer mechanisms are also overviewed. It was found that using biomass-derived carbon as supporting material is a low cost, environmentally friendly way to fabricate outstanding performance composite PCMs, and adopting multi-PCMs is an important way to solve season adaptable problem. Finally, crucial conclusions and future recommendations are provided to guide scholars on research for further improvements.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Andreas Thangam, Amar Auckaili, Mohammed Farid
Summary: This study investigated the impact of individual and combination of different sources of heating in a building containing phase change material (PCM) for a potential reduction in energy consumption while maintaining thermal comfort. The study found that combining active and passive solar heating with temperature-controlled electric oil heater can provide significant energy savings and maintain thermal comfort.
Article
Construction & Building Technology
E. Zavrl, U. Tomc, M. El Mankibi, M. Dovjak, U. Stritih
Summary: This study introduces an active-passive system with phase change material integrated into the internal walls and ceiling for cooling. The system solidifies during the nighttime cycle and provides sufficient cooling effect during the daytime cycle, with comparable operation costs to conventional cooling systems. The results show that the system can sufficiently solidify at supply air temperatures of 17 degrees C and below.
SUSTAINABLE CITIES AND SOCIETY
(2023)
Article
Materials Science, Ceramics
Yi Wang, Haining Ji, Yongxing Chen, Bin Liu, Jiamei Huang, Mingying Lu, Yangyong Ou, Yong Zhao, Jundong Tao, Yan Huang, Junlong Wang
Summary: Controlling the cooling effect in radiative cooling is a major challenge. This paper proposes a novel radiative cooling device that addresses this challenge by adjusting materials and stress to achieve different cooling modes. The device demonstrates excellent energy-saving capabilities in high-temperature environments and prevents excessive cooling in low-temperature environments.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Thanongsak Nochaiya, Apiyada Sangnak, Attakorn Thongtha, Watcharapong Wongkeo, Pincha Torkittikul
Summary: The study investigates the use of waste materials and phase change materials to improve energy efficiency and environment of buildings. Results show that adding HSA in mortar decreases compressive strength and density, but decreases thermal conductivity. Additionally, HSA mortars exhibit a significant increase in time lags with higher HSA content.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Joanna Ferdyn-Grygierek, Krzysztof Grygierek, Anna Guminska, Piotr Krawiec, Adrianna Ocwieja, Robert Poloczek, Julia Szkarlat, Aleksandra Zawartka, Daria Zobczynska, Daria Zukowska-Tejsen
Summary: This study focuses on improving thermal comfort in Polish dwellings through passive and energy-efficient solutions, with a particular emphasis on residents' dissatisfaction with thermal conditions during the summer months. The research found that airing apartments by opening windows increased heating demand but significantly reduced the number of thermal discomfort hours.
Article
Energy & Fuels
Zhenyong Qiao, Xiaohan Tao, Yongcai Li, Xiangfei Kong, Shuli Liu, Qiwei Wang, Yong Li
Summary: The coupling of a solar chimney with an earth-air heat exchanger can benefit from the integration of a phase-change material to improve thermal performance. Numerical studies show that the phase-change material effectively extracts and reallocates solar energy, increasing the nighttime airflow rate and reducing indoor temperature.
JOURNAL OF ENERGY STORAGE
(2023)
Review
Chemistry, Physical
Weisan Hua, Liyu Zhang, Xuelai Zhang
Summary: This paper reviews the theoretical basis and application progress of phase change materials (PCMs) in chip thermal management, including different types of PCMs, non-embedded cooling solutions, and research methods of embedded cooling.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Energy & Fuels
Chunyu Zhu, Chengzhi Zhao, Zihe Chen, Ruijie Zhu, Nan Sheng, Zhonghao Rao
Summary: The study developed a novel 3D porous carbon scaffold consisting of SiC-wrapped biomass carbon fibers to enhance the thermal conductivity and shape stability of paraffin PCM, resulting in improved heat transfer and anti-leakage properties of the composite materials.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Zihe Chen, Ruijie Zhu, Nan Sheng, Chunyu Zhu, Zhonghao Rao
Summary: This study uses wood carbon as a porous support and modifies it with silicon carbide nanowires to improve the thermal conductivity and leakproof performance of paraffin wax phase change composites. The nanowire network in the wood carbon provides additional capillary absorption force and exhibits anisotropic thermal conductivity enhancement.
JOURNAL OF ENERGY STORAGE
(2022)
Review
Engineering, Multidisciplinary
Santosh Chavan, Ramesh Rudrapati, Selvaraj Manickam
Summary: Thermal energy storage (TES) plays a crucial role in various applications, and this paper provides an overview of different applications in different fields. The study focuses on reviewing TES applications in waste heat recovery, cooling of heavy electronic equipment, and other wide areas. The comprehensive study shows that stored thermal energy can be used for heating and cooling applications, and there is great potential for developing new technologies and methods to utilize thermal energy to the maximum extent. Exploring various thermal storage materials and methods opens up many possibilities for sustainable development and utilization of available thermal energy.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Review
Green & Sustainable Science & Technology
Elnaz Rahimi, Aziz Babapoor, Gholamreza Moradi, Saba Kalantari, Mohammadreza Monazzam Esmaeelpour
Summary: This review study emphasizes the importance of personal cooling garments in thermal management, particularly during physical activity and work under hot weather conditions. It discusses the mechanisms of different types of personal cooling garments, with PCM garments being the most widely used. The study also highlights the potential of enhancing PCM effectiveness through the use of nanoparticles and biomass-derived porous carbon materials. Additionally, the review explores performance indicators and equations, evaluation methods, factors affecting cooling efficiency, and the application of PCM in textiles. Future challenges and trends in PCM garment design are also discussed.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
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.