Article
Thermodynamics
Ji-Xiang Wang, Yun-Ze Li, Ming-Liang Zhong, Hong-Sheng Zhang
Summary: The study investigates the application of gas-atomized spray cooling technology in electronics cooling, validates its advantages in improving the heat transfer coefficient through experimental data, and provides a mechanism explanation.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Li Yi, Fei Duan, Minqiang Pan
Summary: This paper proposes an immersion spray array cooling vapor chamber (ISVC) for high-power electronic devices and conducts experimental and numerical studies on thermal performance and flow pattern. It is shown that increasing the inlet temperature of the coolant facilitates the heat transfer performance and temperature uniformity of the ISVC within the safe working temperature range of electronic devices. The ISVC achieves enhanced heat transfer capacity and temperature uniformity with larger inlet flow rates, compared to existing integrated heat sink combined vapor chamber and array jet impingement. The operating limit heating power of the ISVC is increased by at least 68%.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Tao Yang, Wei Zhang, Jianyou Wang, Chuang Liu, Mengzhou Yuan
Summary: This study numerically investigated heat transfer enhancement and surface temperature non-uniformity (STNU) improvement of spray cooling using CFD. Results showed different optimal spray heights for heat transfer and STNU, leading to the development of two methods to enhance heat transfer and reduce STNU. Spray-array jets cooling was found to minimize STNU compared to traditional spray cooling cases. Various liquid film microscopic characteristics and droplet distribution were identified as key factors influencing heat transfer and STNU.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
P. Kotrbacek, M. Chabicovsky, J. Kominek, O. Resl, H. Bellerova
Summary: This paper investigates the influence of water temperature on spray cooling and provides correlations and transformation functions to extend existing correlations. It fills the research gap by presenting generalized results.
APPLIED THERMAL ENGINEERING
(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
Tianlun Huang, Penghui Tan, Yun Zhang, Zhigao Huang, Huamin Zhou
Summary: The floatation nozzle is a key component for manufacturing high-performance substrates. Increasing heat transfer uniformity can improve product quality, and the revised uniformity indicator has increased accuracy. Factors affecting heat transfer and pressure uniformity include edge effects, turbulent intermittence, and interaction between adjacent jets. The floatation nozzle with effusion holes shows better comprehensive performance compared to other types.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Multidisciplinary Sciences
Nicola M. Kerschbaumer, Stefan Niedermaier, Theobald Lohmueller, Jochen Feldmann
Summary: This study presents an approach to achieve spatially structured radiative cooling using an elliptical mirror, enhancing radiative heat transfer between different temperature surfaces. The experimental demonstration of this structured cooling method shows potential for contactless sample cooling and controlled temperature manipulation with minimal disturbance in various science and engineering applications.
SCIENTIFIC REPORTS
(2021)
Article
Thermodynamics
Rong Xue, Xinyi Lin, Yixiao Ruan, Liang Chen, Yu Hou
Summary: The study shows that the temperature is lower in the region closer to the spray field, with a larger temperature difference near the spray on the test plane. The high uniformity of temperature distribution is obtained after flowing through two elbow pipes. In steady-state cooling, the average temperature gradually increases along the flow direction, with the temperature uniformity in the reverse order.
Article
Physics, Fluids & Plasmas
Ilya Vladyko, Nikolay Miskiv, Vladimir Serdyukov, Aleksandr Nazarov, Anton Surtaev
Summary: Spray cooling is an effective method for heat removal in microelectronics and microchips cooling systems. The liquid flow rate, heat flux, and nozzle-to-surface distance have significant influences on the heat transfer rate and temperature distribution. The heat transfer coefficient weakly depends on the heat flux, while the nozzle-to-surface distance has a significant impact. An optimal distance for maximum heat transfer rate and temperature uniformity is proposed.
Article
Thermodynamics
Minqiang Pan, minglong Hu, hongqing Wang
Summary: Research shows that the VC integrated heat sink has lower thermal resistance compared to the VC separated heat sink, and the relatively simple microchannel heat sink can significantly enhance temperature uniformity. Moreover, cooling water flow rate, temperature, and inclination angle all have an impact on the performance of the VC integrated heat sink, with the optimal performance observed at an inclination angle of 60 degrees.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Physical
Yunfei Yan, Chenghua Zhang, Jie Gao, Kaiming Shen, Wei Gao
Summary: This study focuses on optimizing the structure of micro combustors to improve energy output performance of MTPV systems. Results show that both MCIPF and MCEPF have higher combustion efficiency compared to the conventional MCC, with MCIPF having the highest external wall temperature under different conditions and MCEPF maintaining the best temperature uniformity. The application of high thermal conductivity materials like Aluminum, Red Copper, and Silicon Carbide can enhance external wall temperature and temperature uniformity, providing a new design method for improved heat transfer in micro combustors.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Qin Ni, Xiang Ling
Summary: This paper investigates the effects of multi-nozzle arrays, surface roughness, and temperature on a hybrid cooling system. The results show that multi-nozzle arrays enhance convective heat transfer, while surface roughness improves phase change heat transfer. With the use of multi-nozzle arrays and a surface roughness of 1.62μm, the maximum heat flux removal reaches 90 W/cm(2), and the heat transfer coefficient is 21.6 W & sdot;cm(-2)& sdot;K-1, with an enhancement of 28.6%.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Engineering, Multidisciplinary
Zhang ZhiWei, Hu DingHua, Li Qiang, Liu Chao, Zhou Fan
Summary: The study reveals that increasing superheat results in finer droplets and thinner liquid film, improving heat transfer efficiency. Expanding atomization angle benefits in reducing spray distance in flash spray cooling. The choice of nozzle is crucial for the cooling performance in flash spray, depending on the superheat level.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Thermodynamics
Ziqiang He, Yunfei Yan, Zhien Zhang
Summary: Micro heat sinks are crucial for addressing the challenges of high heat flux and non-uniform temperature distribution in electronic devices. Developments in thermal enhancement technologies and reducing non-uniform temperature distribution are essential. An effective adaptive cooling method is urgently needed to improve the efficiency and lifespan of electronic components.
Article
Thermodynamics
Li Yi, Chaomeng Chen, Fei Duan, Minqiang Pan
Summary: A designed integrated arrayed spray impingement vapor chamber (ISVC) was tested for cooling high-power electronic devices and compared with two other integrated arrayed jet impingement vapor chambers (IJVCs) with different jet orifice diameters. The results showed that ISVC had better performance in terms of pressure drop, power consumption, heat dissipation, temperature uniformity, and overall performance.
APPLIED THERMAL ENGINEERING
(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)
