Article
Thermodynamics
Jun Li, Shibo Song, Hong Shi, Yizhe Xu, Erlin Meng, Bo Zhou
Summary: The study compares heat transfer performance between spray cooling (SC) and immersed spray cooling (ISC), showing that reasonable control of immersion state and spray pressure can actually enhance heat transfer by up to 12.2%. Immersion water temperature and spray pressure play crucial roles in ISC, while wide-angle nozzles are not suitable for ISC applications.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Jiale Huang, Qiang Zhou, Lingling Yuan, Zhiliang Xue, Tao Jin
Summary: Spray cooling has a wide range of applications in the heat dissipation of high-power devices. The study found that surface roughness does not significantly affect the heat transfer coefficient in the non-boiling zone, while superhydrophilic/hydrophobic surfaces have lower heat transfer coefficients compared to smooth surfaces.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Thermodynamics
Zhenhong Luo, Kun Liang, Xinwen Chen, Zhaohua Li, Xiang Wang, Hang Zhou, Yucheng Wang
Summary: This study investigates the heat transfer performance of spray cooling in non-boiling regions under vibration using numerical methods. Experimental results show that the film thickness and film velocity vary with frequency, affecting the heat transfer coefficient. Larger vibration amplitudes result in a decrease in the heat transfer coefficient.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Haojie Xu, Junfeng Wang, Bin Li, Kai Yu, Hai Wang, Jiameng Tian, Bufa Li
Summary: This study experimentally investigated the electrohydrodynamic disintegration and electrospray cooling performance of the dielectric fluid HFE-7100. It was found that a small amount of ethanol could significantly improve the charging performance of the coolant, leading to a substantial increase in heat flux for ES cooling.
Article
Thermodynamics
Hao Fu, Rui Zhao, Lei Zheng, Jun Liu, Wenlong Cheng
Summary: In this paper, the combination of spray cooling technology and non-azeotropic mixture was proposed to achieve precise temperature control of a heated surface. Experiments were conducted to study the spray cooling heat transfer of a non-azeotropic mixture in the boiling region. The results showed that there exists an optimal mixing ratio for the non-azeotropic mixture, which results in the best surface uniformity and heat transfer performance. Further studies also revealed the weakening of spray heat transfer performance at low heat flow in the two-phase region, but the non-azeotropic mixture gradually outperformed single component R142b with increasing heat flux.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Yulong Zhao, Siyuan Gong, Guoyin Zhang, Yulin Wang, Minghui Ge
Summary: In this study, a spray cooling experimental system was built to investigate the characteristics and energy consumption of spray cooling in the two-phase region. The results showed that reducing the spray height increased the critical heat flux but also increased energy consumption. These findings provide guidance for optimizing spray cooling applications.
Article
Thermodynamics
Jorge Duarte Benther, Vrushub Bhatt, Juan Diego Pelaez Restrepo, Cameron Stanley, Gary Rosengarten
Summary: High heat generation in the electronics industry hampers further innovations. Spray cooling is a promising technique for cooling high-temperature objects. This study investigates the fluid dynamics and heat transfer of multiple droplet impingement, providing insights for future spray cooling system design and optimization.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Azzam S. Salman, Nabeel M. Abdulrazzaq, Amitav Tikadar, Saad K. Oudah, Jamil A. Khan
Summary: This study conducted experiments to investigate the effects of nozzle-to-surface distance, coolant flow rate, and temperature difference on the heat transfer characteristics of enhanced surfaces in a spray cooling system. The results showed that radial grooves and surface structures played a crucial role in improving heat transfer performance.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Navid Saneie, Varun Kulkarni, Bruce Treska, Kamel Fezzaa, Neelesh Patankar, Sushant Anand
Summary: Investigated microbubble dynamics inside water droplets boiling on superhydrophilic textured substrates using high-speed X-ray phase contrast imaging (XRPCI), revealing that bubble density variations are similar regardless of texture spacing at a given surface temperature. Analyzed heat flux removed by single bubble and all bubbles at a given time for the first time, showing highest dissipation through latent-heat component occurs at the beginning and decreases thereafter. Findings and analysis are expected to guide further research on engineering more efficient boiling heat transfer surfaces.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Guido Marseglia, M. Sanches, A. P. C. Ribeiro, A. L. N. Moreira, A. S. Moita
Summary: The current study investigates the parametric characterization of nanofluid sprays to enhance the thermal performance of spray cooling systems. The results show that nanofluids can improve the thermal performance of spray cooling, with the lowest surface temperature obtained with 0.5% alumina nanofluid and the silver nanofluid with spherical particles achieving the lowest surface temperature compared to triangular particles. The heat transfer coefficients decrease with increasing thermal conductivity and dynamic viscosity of the nanofluids, while a positive correlation is found between the specific heat capacity of the nanofluids and the spray cooling capacity.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Kunal Sandip Garud, Seong-Guk Hwang, Jeong-Woo Han, Moo-Yeon Lee
Summary: This study experimentally investigated the performance characteristics of a direct spray oil cooling system, and explored the effects of nozzle type, cooling oil type, and flow rate on the performance characteristics. The results showed that the combination of dielectric oil and full cone-1 nozzle exhibited superior performance characteristics.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Di Xiao, Shuyi Qiu, David Hung, Xuesong Li, Keiya Nishida, Min Xu
Summary: The study investigates the wall film formation when flash boiling sprays impinge on a cold surface, revealing that flash boiling impingement deposits less film mass on the wall compared to sub-cooled sprays, but still more than impinging on room temperature plate. With decreasing wall temperature, evaporation suppression and condensation effects become increasingly significant in dominating wall film formation.
Article
Engineering, Multidisciplinary
C. J. Ho, Chu-Yun Cheng, Tien-Fu Yang, Saman Rashidi, Wei-Mon Yan
Summary: This study explores the cooling effectiveness and entropy production of aluminum oxide-water nanofluid in circular tubes with wall conduction effects. Results show that heat transfer effectiveness ratios increase with higher input temperatures of fluid and nanoparticle concentrations. Additionally, local entropy production ratios are mostly below unity, indicating the beneficial use of nanofluids for reducing system irreversibility.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Review
Thermodynamics
Jian Xu, Yi Wang, Ren Yang, Wanlong Liu, Hongwei Wu, Yulong Ding, Yongliang Li
Summary: This paper reviews the state-of-the-art knowledge of boiling heat transfer in binary mixtures, emphasizing the advantages of using mixtures in the heating and cooling industry. It provides a summary of important published articles and limitations to existing studies, aiming to guide future research and innovations in this thermal management technique.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
H. Wan, P. J. Liu, G. Q. He, Z. R. Xue, F. Qin, W. Q. Li
Summary: This paper reports experimental and numerical investigations on spray heat transfer in single-phase deionized water. A 3D numerical model is established, considering the exchange of mass, momentum, and energy between the air and water droplets, as well as the heat transfer in the liquid film. The influences of mass flow rates, nozzle diameters, and spray heights on spray heat transfer characteristics are discussed. Results show that increasing mass flow rate can reduce droplet size and improve heat transfer coefficient. The optimal nozzle diameter is 0.6mm, and the optimal spray height is 20mm.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Review
Chemistry, Multidisciplinary
Yuewu Tan, Xuehong Liu, Wei Tang, Jing Chen, Zhengfang Zhu, Lin Li, Nian Zhou, Xiaoyang Kang, Dongliang Xu, Lei Wang, Guixue Wang, Hui Tan, Hui Li
Summary: This paper summarizes various types of flexible pressure sensors with bionic structures developed in recent years. After introducing the latest advancements in flexible pressure sensors, it focuses on substrate and active materials, sensing mechanisms, key parameters, and sensitivity optimization strategies, as well as various bionic microstructures applied to flexible pressure sensors and their performance characterization.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Instruments & Instrumentation
Zhenghua Huang, Xuan Li, Lei Wang, Hao Fang, Lei Ma, Yu Shi, Hanyu Hong
Summary: This paper proposes a spatially adaptive multi-scale image enhancement scheme that can simultaneously consider detail preservation, contrast enhancement, and brightness improvement. By decomposing the image into multi-scale layers, proposing a spatially adaptive Gamma correction strategy, and an adaptive enhancement operator, a high-contrast optical infrared image is obtained.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Correction
Optics
Yihua Hao, Zhixiong Guo
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Thermodynamics
Yi Nan, Yaomin Cai, Zhixiong Guo
Summary: This study analyzes the flow and heat transfer characteristics of three-dimensional nickel-water nanofluid in a prismatic glass louver. The results show that the properties of the nanofluid are not significantly affected by different nanofluid models, and the harvested solar thermal power and its efficiency are closely related to the nanoparticle diameter and flow Reynolds number.
HEAT TRANSFER ENGINEERING
(2023)
Article
Energy & Fuels
Kuan Zhao, Jifen Wang, Huaqing Xie, Zhixiong Guo
Summary: A novel type of microencapsulated phase change materials with excellent thermal stability and high heat storage capability were synthesized. When added to cement matrix, the building board with microPCMs showed significantly increased heat storage capacity and excellent thermal regulation performance.
Article
Materials Science, Multidisciplinary
Xu Huang, Zhixiong Guo, Jinyang Xi
Summary: In this study, the effects of electron-phonon interactions on the lattice thermal conductivity and phonon transport in n-doped Si, diamond, and c-BN are investigated. The results show that electron-phonon interactions reduce the thermal conductivity of doped materials, and the impact is increased by higher electron concentrations and decreased by higher temperatures. The depression effect is more apparent in ultrawide bandgap diamond and c-BN compared to Si.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Physics, Applied
Xinyi Liu, Zhixiong Guo, Jifen Wang, Huaqing Xie
Summary: A multifunctional microencapsulated phase change material (PW@CaCO3/Y2O3) with both photoluminescence and thermal energy storage/ release properties was prepared by in situ polymerization. The material consists of paraffin wax (PW) as the core and thermally conductive CaCO3 as the shell material, with attached nano-Y2O3. Different samples with varying amounts of nano-Y2O3 were prepared and their microscopic morphology, chemical composition, thermal properties, and fluorescence spectra were analyzed. The PC-Y3 sample showed the best thermal performance, with high encapsulation efficiency, thermal energy storage efficiency, and thermal conductivity, as well as enhanced fluorescence intensity. The microencapsulated phase change material has potential applications in areas that require synchronization of fluorescence and thermal modulation.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Computer Science, Artificial Intelligence
Olatunji Mumini Omisore, Toluwanimi Oluwadara Akinyemi, Wenjing Du, Wenke Duan, Rita Orji, Thanh Nho Do, Lei Wang
Summary: This study proposes a weighting-based deep ensemble model for recognizing hand motions in intravascular catheterization. The model extracts features from electromyography data and uses machine learning methods to classify hand gestures. Results show the model achieves high recognition performances and has stable performance across different hand motion classes.
IEEE TRANSACTIONS ON HUMAN-MACHINE SYSTEMS
(2023)
Article
Energy & Fuels
Kuan Zhao, Zhixiong Guo, Jifen Wang, Huaqing Xie
Summary: We encapsulated n-Octadecane (ODE) with titanium dioxide (TiO2) nanoparticle-doped styrene-divinylbenzene copolymer (SDB) through suspension polymerization. The TiO2 nanoparticles were modified with 3-Glycidox-ypropyltrimethoxysilane (KH560) to enhance their anchoring capability at the oil-aqueous interface. The microcapsules with 4.0 wt% TiO2 exhibited the highest thermal storage capacity, improved thermal stability, and demonstrated the best performance in terms of photothermal conversion efficiency and degradation rate.
Article
Computer Science, Artificial Intelligence
Yan Yan, Xuankun Wu, Chengdong Li, Yini He, Zhicheng Zhang, Huihui Li, Ang Li, Lei Wang
Summary: Emotional recognition through exploring EEG characteristics with nonlinear analysis and feature extraction methods has been proposed. The study utilizes phase space reconstruction (PSR) and topological data analysis (TDA) to build emotion feature vectors and achieve high recognition accuracies.
IEEE TRANSACTIONS ON COGNITIVE AND DEVELOPMENTAL SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Toluwanimi Oluwadara Akinyemi, Olatunji Mumini Omisore, Wenjing Du, Wenke Duan, Xing-Yu Chen, Guanlin Yi, Lei Wang
Summary: This study proposes a deep learning-based model for identifying operators' actions in robot-assisted percutaneous coronary intervention (R-PCI) trials. The model achieves a 92%-96% accuracy in identifying five actions across four clusters compared with a recognition performance of 83% when recognizing all six actions.
IEEE SENSORS JOURNAL
(2023)
Article
Computer Science, Artificial Intelligence
Yan Yan, Yi-Chun Huang, Jinjin Zhao, Yu-Shi Liu, Liang Ma, Jing Yang, Xu-Dong Yan, Jing Xiong, Lei Wang
Summary: This work presents a novel approach using topological descriptors of the shape of the dynamical attractor for dynamical system measurements in human physical activity analysis. The proposed framework has three essential advantages: it derives the dynamics descriptor from the observation time series without statistical assumption, describes the phase space topological properties in an intrinsic multiresolution analytical way using topological data analysis, and shows stability in activities state inference with different types of measurement sensing signals. The topological characteristics of the reconstructed phase state space demonstrate strong representational ability for activity type inference in physical activity recognition tasks with wearable sensors.
IEEE TRANSACTIONS ON HUMAN-MACHINE SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Yan Yan, Liang Ma, Yu-Shi Liu, Kamen Ivanov, Jia-Hong Wang, Jing Xiong, Ang Li, Yini He, Lei Wang
Summary: This article proposes a method for recognizing mental workload through topological investigation of brain functional connectivity network. Graph-filtration-based features are extracted using the persistent homology technique to reveal brain state variations. The experimental results demonstrate excellent distinguishing ability of the proposed method in brain state recognition. This work is the first investigation of EEG-based mental workload evaluation using persistent homology analysis.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Lu Gan, Wenke Duan, Toluwanimi Oluwadara Akinyemi, Wenjing Du, Olatunji Mumini Omisore, Lei Wang
Summary: This study proposes a design for a one-dimensional distal force sensor for minimally invasive surgery (MIS) based on the fiber Bragg grating (FBG) sensing principle. The sensor showed good performance in terms of measurement range and accuracy through experiments and theoretical analysis.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Thermodynamics
Youngsuk Oh, Zhixiong Guo
Summary: This study used artificial neural network (ANN) to predict forced convection heat transfer enhancement from microscale pin fin heat sinks. Experimental data was used to train and test the network, and the most accurate predictions for average Nusselt number were obtained. The performance of the ANN model was compared with existing correlations.
HEAT TRANSFER RESEARCH
(2023)
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)
