Article
Energy & Fuels
Yubin Fan, Meng Yu, Chunwei Zhang, Long Jiang, Xuejun Zhang, Yang Zhao
Summary: A method to accelerate PCM melting based on convection intensification is proposed in this paper, which leads to significant reduction in total melting time and improvement in melting performance, as demonstrated by experiments.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Zhen Qin, Chenzhen Ji, Zheng Hua Low, Wei Tong, Chenlong Wu, Fei Duan
Summary: Waste heat recovery from industrial exhaust gases is crucial for reducing fuel consumption and improving energy efficiency. This study focuses on the effect of PCM container geometry on melting behavior and heat storage performance. The results show that a protruding-shaped container with high convection strength significantly improves PCM melting and thermal storage rates.
Article
Energy & Fuels
Banumathi Munuswamy Swami Punniakodi, Ramanathan Kumar, Hrishiraj Anil Kumar, Ramalingam Senthil
Summary: This study investigates the use of different heat transfer tube configurations to improve the charging behavior of phase change materials. The results show that the vertical S-shaped heat transfer tube configuration effectively melts PCM and has higher energy efficiency compared to horizontal configuration.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
R. A. Nicholls, M. A. Moghimi, A. L. Griffiths
Summary: This study investigates the impact of fin type and orientation on the charging and discharging processes of a horizontal concentric filled with phase change material. The results show that the performance is significantly improved with the use of transversal corrugated fin design. The melting process is mainly influenced by natural convection, while conduction is the main mode of heat transfer in the solidification process. The transversal corrugated fin design outperforms other cases in terms of melting time reduction, and the overall processing time is significantly shorter.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Vahid Safari, Hossein Abolghasemi, Leila Darvishvand, Babak Kamkari
Summary: This study evaluates the combined effect of fin configuration and eccentricity of heat transfer tube on the melting behavior of phase change material (PCM) inside shell and tube heat exchangers. Experimental findings show that the eccentric tube HX and bifurcated fin configuration can significantly reduce melting time, while numerical simulations indicate that bifurcations increase total heat transfer rate.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
Hao Liu, Nan Zhang, Zhaoli Zhang, Qiuyi Xia, Yanping Yuan, Xiaoling Cao
Summary: This paper studied the convection-driven melting characteristics of pure phase change material (PCM) under different external force conditions. The results show that external forces have a significant effect on the natural convection of PCM during the melting process and further affect the solid-liquid interface evolution rate, heat transfer rate, and latent heat storage. Applying external force in the opposite direction of the heat flux can enhance the melting process and improve the latent heat storage rate of PCM.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Alireza Jaberi Khosroshahi, Siamak Hossainpour
Summary: Applying Phase Change Materials (PCMs) in Thermal Energy Storage (TES) systems and utilizing storage rotation method can increase the efficiency of renewable energy utilization and accelerate the charging process. The study shows that utilizing step-by-step rotation scenario can reduce the charging time by 15.5% compared to the fixed mode.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
Seyedmohsen Baghaei Oskouei, Zi-Rui Li, Ozgur Bayer, Li-Wu Fan
Summary: This study investigates the effects of close-contact melting (CCM) and natural convection (NC) on melting heat transfer in a latent thermal energy storage (LTES) unit. The results show that the effects of CCM can be enhanced by adjusting the number of fins and their clearance, resulting in faster melting. The role of CCM in the melting process can reach up to 50%, while NC plays a less significant role.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Ismail Gurkan Demirkiran, Luiz Alberto Oliveira Rocha, Erdal Cetkin
Summary: Mobilized thermal energy storage units play a vital role in reducing energy consumption in buildings. The study shows that using high conductive fins and innovative fin structures can enhance the heat transfer performance of thermal energy storage tanks while decreasing investment costs. By optimizing the fin structure, heat transfer can be improved without increasing costs.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yubin Fan, Chunwei Zhang, Meng Yu, Xuejun Zhang, Yang Zhao
Summary: This study proposes an enhancement technique for PCM melting based on convection intensification, where magnetic particles driven by an alternating magnetic field induce forced convection in liquid PCM. Experimental results show a total melting time reduction of 15.8% and a 25.4% increment in overall heat transfer coefficient between the heating surface and solid-liquid interface. A universal correlation with a relative deviation of +10% is obtained for Nusselt number prediction.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Cristina Prieto, Carlos Rubio, Luisa F. Cabeza
Summary: Thermal energy storage is a key technology in the current energy transition, and one of the main technical barriers is the low thermal conductivity of phase change materials (PCM). This study introduces a new concept using metal wool to enhance the thermal conductivity of PCM tanks, showing promising results towards improving energy storage efficiency.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Green & Sustainable Science & Technology
Xiaolin Wang, Una Djakovic, Huashan Bao, Juan F. Torres
Summary: This study experimentally investigated the heat transfer performance and phase change behavior of six PCM capsules of varying shapes, with the red blood cell shape found to have the most rapid freezing and melting process. The results provide insights for future studies on cold thermal energy storage and applications.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Green & Sustainable Science & Technology
Vahid Safari, Hossein Abolghasemi, Babak Kamkari
Summary: This study experimentally and numerically investigated the effects of applying straight and bifurcated fin configurations on melting behavior of paraffin inside the shell-and-tube heat exchangers. The research found that the bifurcated fin configuration outperforms the straight fin configuration, and the fin arrangement also significantly impacts the melting process.
Review
Energy & Fuels
Thiago Torres Martins Rocha, Paulo Vinicius Trevizoli, Raphael Nunes de Oliveira
Summary: Latent thermal energy storage, utilizing phase-change materials, has been extensively studied in various areas including solar energy and refrigeration. This review critically discusses theoretical studies categorized in a wide range of subjects, analyzing intensification techniques and numerical methods. The review also tracks the origins of different topics over the years to identify incremental and disruptive contributions.
Article
Thermodynamics
Bingkun Huang, Shimi Yang, Enyi Hu, Xiuxiu Li, Jun Wang, Peter Lund
Summary: This paper establishes a mathematical model to explain the melting process of PCM affected by natural convection, introducing a coordination factor Co to explain the melting process. The study finds that Co is closely related to the melting rate, promoting the melting rate when Co is greater than 0. The research provides theoretical guidance for enhancing phase change heat storage.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.