Article
Green & Sustainable Science & Technology
L. Liang, Y. H. Diao, Y. H. Zhao, Z. Y. Wang, C. Q. Chen
Summary: The simultaneous charging and discharging of latent thermal energy storage (LTES) can enhance the flexibility of solar thermal systems and ensure the continuity of energy supply. Experimental and numerical simulation results show that factors affecting the SCD thermal behavior of LTES device include heat transfer fluid temperature, volumetric flow, initial phase change material state, and metal foam.
Article
Thermodynamics
Javid Zamani, Ali Keshavarz
Summary: Nowadays, the world is facing an energy crisis, with residential buildings in developed countries accounting for a significant portion of global energy demand. To achieve sustainable energy systems, it is crucial to reduce energy consumption in this sector. The use of phase change materials (PCMs) in energy systems is identified as one of the feasible solutions. This study focuses on investigating the application of PCMs in a dual-pipe latent heat exchanger system for thermal energy storage, with the aim of optimizing the charging and discharging operations to enhance energy efficiency and minimize exergy destruction.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Jasim M. Mahdi, Hayder I. Mohammed, Pouyan Talebizadehsardari, Mohammad Ghalambaz, Hasan Sh. Majdi, Afrasyab Khan, Wahiba Yaici, Donald Giddings
Summary: The study investigated the melting/solidification process in metal foam saturated with phase change material using numerical methods, evaluating the system's performance in different operational modes. The results showed that the use of metal foam and phase change material contributed to uniform heat exchange and efficient space heating. Additionally, the porosity and temperature distribution were found to be closely related to the solidification process.
APPLIED THERMAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Gurpreet Singh Sodhi, P. Muthukumar
Summary: This study presents a numerical model of a vertical shell and tube latent heat storage system, validated with experimental data, and analyzes the performance of single PCM and multiple PCM systems. The results show that the multi-PCM system has better charging and discharging performances compared to the single PCM system, with a significant improvement in specific power. By employing a compound enhancement technique, a reduction in charging and discharging time over the single PCM system is achieved.
Article
Thermodynamics
Man Fan, Zhaoyang Luan, Hua Yang, Xuemei Zhang, Mingdong Hou, Leihong Guo, Xiangfei Kong
Summary: The cascaded latent heat storage (CLHS) system showed excellent thermal and exergy performance in the low-temperature range. This study built different types of CLHS tanks, measured temperature change trends of phase change materials (PCMs), and simulated the CLHS system using a model. The effects of heat transfer fluid (HTF) flow rates, HTF inlet temperatures, number of PCMs stages, and layout of HTF tubes on the system performance were studied, and the overall energy and exergy performance were evaluated.
APPLIED THERMAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Yongping Huang, Xiangdong Liu
Summary: The use of tree-shaped fins can enhance the thermal performance of vertical LHS units, improving temperature uniformity and accelerating the melting/solidification rate.
Article
Energy & Fuels
Maria K. Koukou, Christos Pagkalos, George Dogkas, Michail Gr. Vrachopoulos, Eleni Douvi, Yannis G. Caouris, Polykarpos Papadopoulos
Summary: A numerical study investigated the performance of different phase change materials (PCMs) in a solar collector for thermal storage. The study found that the charging and discharging processes varied for different PCMs.
Article
Energy & Fuels
Rejane De Cesaro Oliveski, Alexandre de Quadro Tacques Filho, Ionatan Anton Schroer
Summary: There are many advantages to using thermal storage with phase change materials (PCM) and incorporating fins for heat transfer optimization. This study analyzes the effects of fin aspect ratio and positioning on the melting and solidification processes in a rectangular cavity. It was found that higher fin aspect ratios result in higher melting and solidification rates, especially in lower cavity positions.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Bowen Xu, Shilei Lu, Ran Wang, Xue Zhai, Minchao Fan, Wei Jia, Haibing Du
Summary: Exergy analysis provides theoretical guidance for the cascaded latent heat storage system (CLHSS), but the analysis of charging-discharging processes has two problems; this paper solves these problems by revealing exergy flow paths, deriving overall exergy efficiency, and modifying models with constraints.
Article
Green & Sustainable Science & Technology
Mebrouk Benbrika, Mohamed Teggar, Muslum Arici, Kamal A. R. Ismail, Said Bouabdallah, El-Hacene Mezaache
Summary: The study investigated thermal charging and discharging processes of a phase change material dispersed with graphene nanoplatelets in a horizontal cylinder for thermal energy storage. It was found that the presence of GN expedited the charging time and solidification time, but led to a reduction in thermal storage capacity.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Energy & Fuels
A. Allouhi, M. Benzakour Amine
Summary: This study aims to characterize the performance of a heat pipe flat plate solar collector using different nanofluids, with CuO-based nanofluid showing the highest enhancements in energetic and exergetic efficiencies. The decrease in specific heat of nanofluids is identified as the main thermal property responsible for performance improvement.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Energy & Fuels
Tingwei Zhang, Gaofeng Lu, Xiaoqiang Zhai, Bin Li
Summary: A PCM integrated solar air collector/storage unit for mid-temperature applications was proposed and studied in terms of thermal performance and optimization parameters through experiments and numerical models. The results showed that the system could prolong the utilization of solar energy compared to traditional solar pipes, and structural optimization could improve the duration of the discharging process.
Article
Thermodynamics
Shahab Bazri, Irfan Anjum Badruddin, Abdullah Yousuf Usmani, Saleem Anwar Khan, Sarfaraz Kamangar, Mohammad Sajad Naghavi, Abdul Rahman Mallah, Ali H. Abdelrazek
Summary: This paper numerically investigates the performance of a compact solar water heater using evacuated tube heat pipe solar collectors coupled with a latent heat storage tank. The study uses three phase change materials to model the system and analyzes the temperature and thickness variation during high solar radiation conditions. The research is validated through experimental verification.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Sandip Khobragade, Jaya Krishna Devanuri
Summary: This paper investigates the impact of inclination on the thermal performance of a latent heat storage system based on a cylindrical shell and tube heat exchanger. A visualized numerical simulation is conducted during the simultaneous charging and discharging process to demonstrate the melting process of the phase change material. The results show that a horizontal configuration provides better thermal performance, with an increase in melt fraction and energy stored compared to the vertical position. The position of the cold heat transfer fluid also influences the melting process. The study also analyzes the flow behavior of the phase change material with inclination angles.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Fakhar ul Hasnain, Muhammad Irfan, Muhammad Mahabat Khan
Summary: This study numerically investigates the performance enhancement of a concentric tube LHS unit using a fin structure and a fin-nanoparticles hybrid strategy. The results show that the double-branched fin design achieves the highest heat transfer enhancement, while adding 1% Al2O3 nanoparticles achieves the best balance between time saving and energy storage features.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
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.