Article
Mechanics
Wenwu Zhou, Kechen Wang, Tangjia Yuan, Xin Wen, Di Peng, Yingzheng Liu
Summary: The spatiotemporal distributions of coolant coverage behind the 777-shaped hole, sweeping jet, and compact SJ were comprehensively quantified and compared. It was found that the compact SJ had the highest cooling effectiveness, but its flow structure coherence was reduced.
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
Radek Guras, Miroslav Mahdal, Marian Bojko
Summary: This article discusses the CFD simulation of a unique liquid cooling device that combines a two-circuit liquid cooling system with an accumulator and a cooling core consisting of Peltier modules. The simulation aims to predict cooling time, model media flow, and determine the efficiency of the device. The device achieved cooling of 2L of media in slightly over 40 min with an overall efficiency of 14.376%.
APPLIED 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
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
Materials Science, Multidisciplinary
Yongyan Hu, Yifan Lei, Xiuliang Liu, Ronggui Yang
Summary: This study demonstrates the use of multi-layer copper micromesh to enhance the heat transfer performance of liquid film boiling in spray cooling. The results show that the micromesh structure and spray flow rate have synergistic effects on liquid supply and bubble escape.
MATERIALS TODAY PHYSICS
(2022)
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
Tingting Wu, Changhong Wang, Yanxin Hu, Xianbo Fan, Changxiang Fan
Summary: This article theoretically analyzes the heat transfer performance of spray cooling technology to achieve a balance between temperature uniformity and compactness of the battery module. The main factors affecting spray cooling's heat transfer performance are discussed. Experimental results show that spray cooling can achieve higher heat transfer coefficients, provide lower temperature rise, and more uniform temperature distribution, making it an efficient approach for managing heat accumulation in battery modules.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Thermodynamics
Haojie Xu, Junfeng Wang, Bin Li, Kai Yu, Jiameng Tian, Dongbao Wang, Wei Zhang
Summary: The heat transfer performance of electrospray cooling has been experimentally investigated with different spray modes, showing that droplet size decreases and spray velocity increases with higher applied voltage. As the spray mode transitions to cone-jet/multi-jet modes, the nucleate boiling region is extended and the critical heat flux increases. Electrospray cooling significantly enhances cooling capacity by precise control under certain conditions.
APPLIED THERMAL ENGINEERING
(2021)
Review
Thermodynamics
J. D. Benther, J. D. Pelaez-Restrepo, C. Stanley, G. Rosengarten
Summary: This article discusses the application of spray cooling and multiple droplet impingement heat transfer technology in improving spray cooling efficiency. Research shows that enhanced surfaces can enhance the outcome of spray cooling, but further studies are still needed to investigate the effects under different conditions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
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
Energy & Fuels
Yunus Tansu Aksoy, Hendrik Cornelissen, Pinar Eneren, Maria Rosaria Vetrano
Summary: In this study, the effect of water-based TiO2 nanofluids on spray characteristics and heat transfer was investigated. It was found that the presence of nanoparticles did not significantly alter the spray characteristics, but enhanced heat transfer mainly in the boiling regime by providing more nucleation sites. However, in the non-boiling regime, the contribution of adsorbed nanoparticles to heat transfer enhancement diminished. Overall, the nanofluids at 0.05 wt.%, 0.1 wt.%, and 0.2 wt.% cooled the aluminum block 6%, 12%, and 25% faster than DI water, respectively.
Article
Nuclear Science & Technology
Peng Sun, Chuan-Ke Liu, Zhi-Zhu He
Summary: This paper presents a novel conception of a high-performance double spiral electromagnetic pump (DS-EMP) for efficiently driving liquid metal (LM) fluid with minimum volume. The driving characteristics of DS-EMP have been investigated through mathematical modeling and experimental testing, showing that the performance can be regulated by changing the number of spiral flow channels.
ANNALS OF NUCLEAR ENERGY
(2023)
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
Energy & Fuels
Yi-Huan Huang, Yi-Xin Cheng, Rui Zhao, Wen-Long Cheng
Article
Energy & Fuels
Lei Zheng, Yong-Le Nian, Rui Zhao, Wen-Long Cheng
Summary: A new method for predicting multi-reservoir production using temperature logging data is proposed in this paper. A comprehensive heat transfer model is established, and a stochastic approximation method is used for prediction. After testing on a water injection well, the simulated temperature distribution by the model shows good agreement with the reference data, with estimation error of total flow rate less than 9%.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Thermodynamics
Jian-Wei Zhao, Rui Zhao, Yong-Le Nian, Wen-Long Cheng
Summary: The varying density of supercritical carbon dioxide affects heat transfer, with the adaptive flow path proving effective in reducing pressure loss. Additionally, flow direction has a significant impact on heat transfer coefficients.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Yu-Hui Pan, Rui Zhao, Xi-Hui Fan, Yong-Le Nian, Wen-Long Cheng
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Xiang-Yang Wang, Na Liu, Rui Zhao, Yong-Le Nian, Wen-Long Cheng
Summary: The paper proposes a method to predict the temperature-dependent thermal conductivity of charring ablator using genetic algorithm and cubic spline interpolation for a special ablative material. The developed ablative heat transfer model considers pyrolysis, carbon-silica reaction, and convective heat transfer, resulting in accurate temperature profiles. The study concludes that adding nodes to the interpolated thermal conductivity curve has limited improvement when the existing nodes already define it well.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2021)
Article
Thermodynamics
Yi-Yi Li, Rui Zhao, Wen-Jun Long, Ruo-Xin Liu, Wen-Long Cheng
Summary: The use of high alcohol surfactant in spray cooling enhances heat transfer mainly by reducing surface tension, increasing droplet diameter, and subsequently increasing liquid film thickness and velocity. The improved heat transfer performance is primarily attributed to the increased Weber number.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Hui Liang, Ze-Kang Sang, Yun-Zhi Wu, You-Hua Zhang, Rui Zhao
Summary: A heater auto-tuned by a PID neural network was proposed in this paper, showing good temperature control performance in complex outdoor conditions, adapting well to weather and climate changes with low overshoot and short settling time.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Hao Fu, Rui Zhao, Wenjun Long, Wenlong Cheng
Summary: This study proposes a rapid cooling method based on vacuum spray flash evaporation and demonstrates the feasibility and superiority of this method through comparisons with existing rapid cooling methods. Experimental results show that the vacuum spray flash cooling (VSFC) cools almost six times faster than a freezer. Optimization of operational parameters and analysis of influencing factors are conducted, revealing the characteristics of the beverage cooling process.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Yuhui Pan, Rui Zhao, Yongle Nian, Wenlong Cheng
Summary: The heat transfer performance of the pin-fin manifold microchannel is better than that of the rectangular manifold microchannel at the same mass flux, although the pressure drop is higher. Additionally, at the same pressure drop, the heat transfer performance of the pin-fin manifold microchannel is still superior to that of the rectangular manifold microchannel.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Jian Chen, Shuang-Gen Yang, Rui Zhao, Wen -Long Cheng
Summary: This study experimentally investigates the heat transfer characteristics of S-CO2 in tubes with different roughness. The results reveal that rough walls help alleviate heat transfer deterioration, and a heat transfer correlation for rough tubes is proposed.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yu -Hui Pan, Rui Zhao, Yong -Le Nian, Wen -Long Cheng
Summary: A pin-fin staggered manifold microchannel heat sink is proposed in this paper to enhance the heat dissipation performance of conventional manifold microchannel heat sink. The heat transfer performance of the proposed heat sink is compared with rectangular manifold microchannel and pin-fin manifold microchannel using single-phase flow numerical simulation. The results show that the proposed heat sink has better heat transfer capability and more uniform heating surface temperature.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Li-Kai Mao, Rui Zhao, Jiong Chen, Wen-Long Cheng
Summary: A convenient and efficient anisotropic thermal conductivity prediction model for composite phase change materials (CPCMs) was proposed. The model calculates the angular distribution of thermal conductivity particles in CPCMs quantitatively and shows good agreement with experimental values. The study found that the ellipsoidal thermal conductivity particles tended to be distributed horizontally with increasing compression ratio, resulting in more obvious anisotropy in the thermal conductivity of CPCMs. By adjusting the particle parameters, the radial thermal conductivity of CPCMs can be improved.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
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
Mechanics
Lei Zheng, Rui Zhao, Yong-Le Nian, Jun Liu, Wen-Long Cheng
Summary: This paper investigates the influence of nozzle's tangential velocity to axial velocity ratio and swirl diversion channel eccentric distance on spray parameters. Results show that both parameters have a linear relationship with the peak location of each spray parameter.
Article
Thermodynamics
Hui Liang, Rui Zhao
Summary: A dynamic model and a model predictive temperature control algorithm for a closed-loop spray cooling system were proposed. The algorithm could accurately estimate sudden changes in heat load and plan an optimized control path to achieve temperature stability. Simulation results showed that the algorithm outperformed PID in terms of temperature stability, with shorter peak and settling times, and smaller temperature offset. Experimental data validated the accuracy of the simulation results.
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)
