Article
Thermodynamics
Cun-liang Liu, Lin Ye, Fan Zhang, Rong Huang, Bingran Li
Summary: Experimental investigation was conducted to compare the film cooling performance of a novel furcate hole with other hole geometries. The furcate hole showed more comprehensive film coverage but poorer heat transfer uniformity. With increasing blowing ratio M, the advantages of high eta of the furcate hole were gradually revealed.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Nan Wu, Xingyao Li, Nan Ouyang, Wencan Zhang
Summary: In this study, minichannel liquid cooling systems were developed and numerically investigated to regulate the temperature spikes and temperature gradients of large-sized lithium-ion battery packs. The research results suggest that the mini-channel liquid cooling system integrating the step-allocated coolant scheme can be a new approach for the thermal management of large-sized battery packs.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Chunhua Wang, Yunan Wang, Hai Wang, Jingzhou Zhang, Siti Aisyah Alting
Summary: Combined with infrared thermography tests, large eddy simulation was used to study the effects of frequency and amplitude of pulsating film cooling on a flat plate. At low blowing ratio, coolant pulsation leads to a decrease in cooling effectiveness, with amplitude having a more pronounced effect than frequency. At high blowing ratio, coolant pulsation can enhance cooling effectiveness at low amplitude, but reduces it at high amplitude. The introduction of coolant pulsation increases eddy energy and turbulent kinetic energy in the near field, but this effect weakens with streamwise distance.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
K. Monika, Chanchal Chakraborty, Sounak Roy, Srikanta Dinda, Satyapaul A. Singh, Santanu Prasad Datta
Summary: This study proposes an ingeniously designed rectangular mini-channel cold plate for thermal management of lithium iron phosphate (LiFePO4) batteries in automotive applications. The cold plate, with 5 mini channels of width 4 mm and parallel flow design, is shown to be the ideal trade-off between heat transfer and pressure drop for better thermal management across the battery module.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Yi-Ping Wang, Wang Chen, Yuan-Yi Huang, Xun Liu, Chu-Qi Su
Summary: This paper proposes a specific structure of an automotive direct contact thermoelectric generator system that aims to recycle the heat in vehicle exhaust and transform it into electricity. The system features a direct-contact configuration with no space between the thermoelectric modules, exhaust gas, and coolant water, which allows for better system integration, minimized thermal resistance, and improved thermal efficiency. Numerical simulations and experimental tests are conducted to analyze the system's output characteristics and heat transfer performance, as well as the influence of experimental parameters on power generation. The findings provide valuable insights for the design and optimization of heat exchangers and thermal resistance in the automotive thermoelectric generator system.
Article
Green & Sustainable Science & Technology
Fahad Ghallab Al-Amri, Taher Maatallah, Richu Zachariah, Ahmed T. Okasha, Abdullah Khalid Alghamdi
Summary: This study presents enhanced net channel based heat sink designs for cooling HCPV systems. The impact of different designs on the system performance was investigated and compared under the climate conditions of Dammam city. The results showed that the double-layered counter flow net channel heat sink performed the best in terms of electrical efficiency and keeping the solar cell operating within safe limits, while the parallel flow net channel achieved higher heat recovery rate.
Article
Thermodynamics
Yulong Zhao, Siyuan Gong, Caihong Zhang, Minghui Ge, Liyao Xie
Summary: This study investigates the application of spray cooling to photovoltaic cells and establishes a mathematical model for solar photovoltaic power generation systems. The results show that spray cooling has significant advantages over water cooling at large concentration ratios, and there exists an optimal spray flow rate that maximizes net electrical efficiency. Additionally, a decrease in spray fluid temperature can significantly improve the system's output power.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
X. C. Liu, W. T. Li, Y. Q. Zhou, Y. Z. Li, X. J. Pei, Z. K. Shen, Q. H. Wang
Summary: The multiple effects of forced cooling on joint quality in coolant-assisted friction stir welding and the underlying mechanism were investigated. It was found that forced cooling can refine the grains in the weld zone, improve the tensile strength of the joint, but reduce the elongation. These effects are achieved by decreasing the heating rate, increasing the cooling rate, and suppressing grain growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Polymer Science
Chil-Chyuan Kuo, Jing-Yan Xu, Yi-Jun Zhu, Chong-Hao Lee
Summary: Metal additive manufacturing techniques are commonly used to manufacture injection molds with conformal cooling channels. This study investigated the effects of different coolant media on the cooling performance of injection molds. It was found that cooling water with ultrafine bubble was the best cooling medium, increasing cooling efficiency by about 12.4%.
Article
Thermodynamics
Cun-liang Liu, Bingran Li, Lin Ye, Huiren Zhu, Changxian Zhang, Wei Song
Summary: The study investigated the application of ribbed cross-flow coolant channels with film hole effusion and the effects of internal cooling configuration on film cooling performance. Results showed that the position of film holes and orientation of ribs had consistent effects on the outlet velocity distribution of the film holes, jet pattern, and discharge coefficient based on different position cases.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Review
Chemistry, Physical
Masoud Karimi, Xiaolin Wang, James Hamilton, Michael Negnevitsky, Sarah Lyden
Summary: This paper reviews the potential for hybrid dual-fuel applications, identifying engine flexibility as a major integration barrier. Through comparing the flexibility of various dual-fuel technologies to operate dynamically, the paper presents a critical review across hydrogen, liquified petroleum gas (LPG), natural gas (NG), and blended hydrogen and NG derivatives. The results identify a range of approaches able to improve engine flexibility and reduce the cost and carbon intensity of diesel-fired internal combustion engines.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Rujing Yan, Zherui Lu, Jiangjiang Wang, Haiyue Chen, Jiahao Wang, Yuanjuan Yang, Dexiu Huang
Summary: This research introduces a multi-objective stochastic multi-scenario optimization method to determine the optimal capacity of wind, solar, and geothermal energy in a CCHP system, considering energy supply independence, environmental impact, economic, and energy efficiency. The optimization problem is solved using non-dominated sorting genetic algorithm II, demonstrating that stochastic multi-scenario optimization can save computation time compared to traditional optimization methods.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
Ruxing Gao, Leiyu Zhang, Lei Wang, Chundong Zhang, Ki-Won Jun, Seok Ki Kim, Hae-Gu Park, Tiansheng Zhao, Hui Wan, Guofeng Guan
Summary: Power-to-liquid (P2L) and power-to-gas (P2G) processes are sustainable pathways to mitigate climate change. Water electrolysis technologies, including PEM, AEM, SOEC and AWE, have received widespread attention for H2 production in P2L and P2G processes. Economic analysis shows that the P2L/P2G process using SOEC technology has the lowest total production cost, while the process using AEM technology has the lowest net CO2 reduction cost. Future cost savings in water electrolysis units could significantly improve the profitability of P2L/P2G processes.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Thermodynamics
Ali Zamiri, Jin Taek Chung
Summary: This study investigates the influence of internal coolant crossflow orientations on film-cooling effectiveness and turbulent flow structures of fan-shaped cooling holes using large eddy simulations (LES). The results show that the coolant channel parallel to the mainstream flow direction exhibits the best cooling performance, while the coolant channel perpendicular to the mainstream flow direction displays the lowest area-averaged film-cooling effectiveness and greater flow unsteadiness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Keda Pan, Zhaohua Chen, Chun Sing Lai, Changhong Xie, Dongxiao Wang, Xuecong Li, Zhuoli Zhao, Ning Tong, Loi Lei Lai
Summary: This study proposes an unsupervised data-driven disaggregation method for better quantifying behind-the-meter photovoltaic power generation. By establishing PV power generation sensitivity estimation model and energy consumption sensitivity model, and introducing EC compensation, net load disaggregation is achieved, resulting in improved disaggregation accuracy.
Article
Thermodynamics
Yuguo Gao, Yilin Ning, Chengzhen Wu, Minghan Xu, Saad Akhtar, Arun S. Mujumdar, Agus P. Sasmito
Summary: By comparing the effects of impinging and non-impinging jet, the experimental results show that impinging jet can make the water droplets smaller, more evenly distributed and have longer residence time, which improves the turbulence flow and heat transfer efficiency, reduces the supercooling of water, and increases the production of ice particles. In addition, the impinging flow system has a higher refrigeration coefficient, which significantly improves the refrigeration efficiency of the ice-making system.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Samson P. Pinto, Piyush Dandagawhal, Agus P. Sasmito, Joshua Lacey
Summary: A two-dimensional axisymmetric model has been proposed to predict property changes in a seasonal rock-pit energy storage (RPES) system. The model, which simplifies the geometry of the rock-pit, has been solved using both linear thermal equilibrium (LTE) and linear thermal non-equilibrium (LTNE) models. The findings suggest significant energy savings, increased heat storage capacity with higher thermal mass rocks, and a return on investment of under 12 years.
Article
Thermodynamics
Kim Leong Liaw, Khai Chuin Ong, Muhammad Aliff B. Mohd Ali Zar, Wen Kang Lai, M. Fadhli B. Muhammad, Firmansyah, Jundika C. Kurnia
Summary: This study investigates the performance of a small-scale impulse gas turbine for electricity generation, using computational fluid dynamics (CFD) in combination with experimental validation. The results show that a compact impulse gas turbine driven by natural gas produces a maximum power output of 1743.81 W at a lower speed of 4500 RPM, while a maximum power of 1084.04 W can be achieved when driven by compressed air at 19 bar and a rotational speed of 7000 RPM.
Article
Thermodynamics
Kim Leong Liaw, Jundika C. Kurnia, Zulfan A. Putra, Muhammad Aziz, Agus P. Sasmito
Summary: This study evaluates the heat transfer performance in a helical twisted Multilobe tube and proposes an enhancement method by combining twisting and Multilobe strategies. The results from experiments and numerical simulations reveal that this combination improves convective heat transfer performance. Furthermore, the variation of Multilobe geometries has a negligible effect on the heat transfer performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Ahmad F. Zueter, Muhammad S. K. Tareen, Greg Newman, Agus P. Sasmito
Summary: In this study, a fully-conjugate computational-fluid-dynamics (CFD) model was developed to analyze the heat extraction capacity and profile of super-long thermosyphons in artificial ground freezing (AGF). The results showed the presence of a no-boiling-zone below 10-25 m of pool surface. The charge pressure significantly influenced the startup of the thermosyphon. Lower wind temperature extracted more heat from the ground in a similar manner to higher wind temperature. Overall, this study provides fundamental understanding of the performance of super-long thermosyphons in AGF.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Geological
Samir M. Deyab, Adel Ahmadihosseini, Hamed Rafezi, Ferri Hassani, Agus P. Sasmito
Summary: Over the past decade, numerous studies have evaluated the effectiveness of microwave treatment in improving rock fragmentation. This study takes a different approach by investigating the applicability of mode I fracture toughness parameters for evaluating the effectiveness of microwave treatment as a rock pre-conditioning method based on energy analysis. The study shows that for the basalt rock used, a minimum diameter of 70 mm is required for fracture toughness experiments. The use of a finite element numerical model to optimize energy absorption in the sample cavity demonstrates significant improvements in microwave efficiency and weakening energy.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Review
Energy & Fuels
Leyla Amiri, Hamidreza Ermagan, Jundika C. Kurnia, Ferri Hassani, Agus P. Sasmito
Summary: Thermal energy storage is necessary for efficient utilization and conversion of thermal energy. Rock thermal energy storage (RTES) has gained attention due to its capability to hold large amounts of thermal energy, simple storage mechanism and low cost. Technical challenges include pressure drop and suboptimal heat transfer. To address these challenges and guide future research, comprehensive review of current technology and development of RTES is essential. Non-technical aspects such as policy and community awareness will also be discussed.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Chemistry, Physical
Seyed Salar Hoseini, Alireza Seyedkanani, Gholamhassan Najafi, Agus P. Sasmito, Abdolhamid Akbarzadeh
Summary: Before replacing fossil fuels, it is important for renewable energy options to address the challenges of conversion and storage. This necessitates the development of advanced materials that can enhance the effectiveness of energy conversion and storage systems. Multiscale architected porous materials offer opportunities for optimized energy conversion and storage due to their controllable porosity and other desirable characteristics. This comprehensive review explores the advancements in utilizing such materials for renewable energy storage and conversion applications, providing valuable insights and research guidance for their future implications in renewable energy systems.
ENERGY STORAGE MATERIALS
(2023)
Article
Engineering, Geological
Haitham M. Ahmed, Adel Ahmadihosseini, Ferri Hassani, Mohammed A. Hefni, Hussin A. M. Ahmed, Hussein A. Saleem, Essam B. Moustafa, Agus P. Sasmito
Summary: This study presents a novel experimental method to evaluate rock failure mechanisms due to microwave treatment and finds that the presence of microwave absorbing minerals can enhance microwave efficiency and lead to heat concentration inside the rock.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Abdul Zahir, Perumal Kumar, Agus Saptoro, Milinkumar Shah, Angnes Ngieng Tze Tiong, Jundika Candra Kurnia, Samreen Hameed
Summary: This study focuses on the optimization of monoethanolamine (MEA) dispersion in rotating packed bed (RPB) for CO2 absorption. Computational fluid dynamics (CFD) model is developed and validated, and the effect of operational parameters on MEA dispersion is investigated. The liquid dispersion of MEA is modeled using response surface methodology, artificial neural network, and adaptive neuro-fuzzy inference systems. The comparison of the modeled data shows that artificial neural network is the most capable model for predicting MEA dispersion. Inlet velocity of MEA is found to be an insignificant parameter that does not contribute significantly to MEA dispersion in RPB.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Thermodynamics
Kim Leong Liaw, Jundika C. Kurnia, Wen Kang Lai, Khai Chuin Ong, Muhammad Aliff, Mohd Ali Zar, M. Fadhli B. Muhammad
Summary: This study uses Computational Fluid Dynamics (CFD) and the Taguchi method to optimize the nozzle and blade of a compact non-combustion impulse gas turbine. The results show that the optimized turbine has significantly higher power output compared to the original turbine.
Article
Thermodynamics
Minghan Xu, Yosuke Hanawa, Saad Akhtar, Atsushi Sakuma, Jianliang Zhang, Junichi Yoshida, Masakazu Sanada, Yuta Sasaki, Agus P. Sasmito
Summary: We propose a multi-scale solidification framework for pure substances, combining laboratory experiments and mathematical modeling. State-of-the-art thermal control chamber and optical devices are utilized to capture the multi-scale phenomena of solidification. A unified mathematical model is developed to quantitatively examine the solidification process at three scales, and the results show good agreement with experimental data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Yuguo Gao, Jiaqi Luo, Fu Fang, Minghan Xu, Mohammaderfan Mohit, Tariq Shamim, Agus P. Sasmito
Summary: Nanofluid ice slurry stability was evaluated and compared between a dynamic and a static production method, and empirical correlations for predicting thermophysical properties based on phase-change cycles were developed.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Minghan Xu, Saad Akhtar, Mohammaderfan Mohit, Ahmad F. Zueter, Agus P. Sasmito
Summary: In this study, a two-phase Stefan problem with a convective or Robin boundary condition is formulated, without assuming that the interface moves instantaneously at time t = 0. A comprehensive asymptotic analysis is performed and the method of property averaging is employed. The developed asymptotic solution is verified and found to extend the valid range of the Stefan number compared to conventional techniques.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Review
Green & Sustainable Science & Technology
Saad Akhtar, Minghan Xu, Mohammaderfan Mohit, Agus P. Sasmito
Summary: This article reviews various mathematical approaches used to model droplet freezing at different stages. It analyzes the application of these approaches in pharmaceutical, food, energy storage, meteorology, and process industry fields. The review concludes that while significant progress has been made in macro-scale modeling of droplet solidification, there is a need for further development of holistic mathematical models that incorporate nucleation dynamics.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
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.
