Article
Thermodynamics
Fahad S. Alkasmoul, Mohammed Asaker, Ahmed Almogbel, Ahmed AlSuwailem
Summary: This study evaluates the thermal and hydraulic performance of different nanofluids in a microchannel heat sink and finds that nanofluids can enhance its thermal performance. However, considering the flow rate and pumping power, the use of nanofluids deteriorates the heat dissipation efficiency of the heat sink, resulting in no beneficial aspects in terms of thermal performance and energy cost.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Review
Chemistry, Multidisciplinary
Yuwei Wang, Jie Yu, Cong Qi, Wenjie Zhang
Summary: In this paper, the thermophysical properties and thermo-hydraulic performance of nanofluids in microchannels are reviewed, and the methods to improve the heat dissipation capability of microchannel heat sinks are analyzed from both thermal and flow perspectives.
Review
Chemistry, Multidisciplinary
Mudasar Zafar, Hamzah Sakidin, Mikhail Sheremet, Iskandar Dzulkarnain, Roslinda Mohd Nazar, Abida Hussain, Zafar Said, Farkhanda Afzal, Abdullah Al-Yaari, Muhammad Saad Khan, Javed Akbar Khan
Summary: Nanofluids and nanotechnology are crucial for enhancing heat transfer efficiency, as the nanoparticles within them have high thermal conductivity. Previous research has shown the use of nanofluid-filled cavities to increase heat transfer rates for two decades. This review explores various parameters including cavities' significance, nanoparticle concentration and material, inclination angle, and magnetic field effects. Different shapes of cavities offer advantages in multiple applications, with circular microchannel heat exchangers performing best. The use of nanofluids improves thermal performance in all cavities, and further research should focus on different nanoparticle shapes and cavity designs.
Article
Thermodynamics
Yuwei Wang, Wenzhu Li, Cong Qi, Jie Yu
Summary: This paper applies hierarchical microchannels and nanofluids to enhance the heat dissipation of electronic components. The study considers two types of hierarchical microchannels (rectangular microchannels and circular microchannels), and analyzes three different channel equivalent diameters (microchannel-a, microchannel-b, microchannel-c). In addition, the influence of nanoparticle concentration on pressure drop, cooling uniformity, thermal resistance, and heat transfer coefficient is studied. The results show that different types of microchannels have different characteristics and performance.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Yuguo Gao, Qianchao Hu, Yitao Ren, Xinyu Wang, Shuman Guo, Zhonglan Hou, Pengyan Guo
Summary: Nanofluids have been found to effectively enhance the heat transfer performance of different types of heat pipes. This paper provides a comprehensive literature review on the application of nanofluids in thermosyphon heat pipe, pulsating heat pipe, and wick heat pipe. The influence of important variables such as different nanoparticles, concentrations, packing ratios, inclination angles, and thermal loads on heat pipe performance is discussed. Studies show that there is an optimal nanoparticle concentration for highly efficient utilization. The enhanced heat transfer performance is attributed to the enhanced Brownian motion, improved surface wettability, increased nucleation sites, and inherently high thermal conductivity of nanofluids. Finally, the current problems and future trends of heat pipe technology based on nanofluids are discussed.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Yi Peng, Zhibin Li, Shaobo Li, Bin Cao, Xuan Wu, Xianfeng Zhao
Summary: The paper presents a zigzag-serpentine microchannel heat sink (ZSMHS) designed to study heat transfer and hydraulic performance through experiments. Different angles of the zigzag microchannel were investigated, with 30 degrees providing the lowest pressure drop, friction coefficient, and thermal resistance. The serpentine microchannel improved the hydraulic performance of the ZSMHS.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Nanoscience & Nanotechnology
Junsheng Hou, Junjie Wu, Hongqiang Chen, Lei Huang, Li Ma, Xiong Zhao, Zihan Ding, Yonghai Zhang, Jiabin Fang, Jinjia Wei, Satoshi Watanabe, Nanjing Hao
Summary: A facile microfluidic synthesis strategy is developed to prepare highly stable and size-controllable silica nanofluids, enhancing the heat transfer efficiency and providing new insights for the rational design of two-phase cooling nano-systems.
MATERIALS TODAY NANO
(2023)
Article
Thermodynamics
Mingzheng Ye, Jianqiang Du, Jin Wang, Lei Chen, Petar Sabev Varbanov, Jiri Jaromir Klemes
Summary: In this paper, a combined structure of fan-shaped cavities and oval pin fins is designed for a rectangular microchannel heat sink. The effects of different structural parameters on the performance are investigated. The results show that the microchannel exhibits improved hydrothermal performance under the optimal parameter combination.
Article
Nuclear Science & Technology
Xiang Zhou, Chen Zeng, Yinxi Song, Ming Jiao, Feixi Zhang, Maolong Liu
Summary: This study experimentally investigates the heat transfer and resistance characteristics of a microchannel heat exchanger with zigzag flow channels. By analyzing the influence of various experimental parameters, correlations of heat transfer coefficient and flow resistance factor are established. The research results can be used to validate the CFD simulation and design of this type of heat exchanger.
PROGRESS IN NUCLEAR ENERGY
(2022)
Article
Thermodynamics
Sayantan Mukherjee, Sylwia Wcislik, Vidyasri Khadanga, Purna Chandra Mishra
Summary: This paper investigates the impact of utilizing Al2O3/water, MgO/water, and TiO2/water nanofluids in a rectangular microchannel heat sink. The study finds that nanofluids can enhance heat transfer performance, reduce thermal resistance, and minimize total entropy generation. However, higher nanofluid concentration and larger microchannel geometry result in increased pumping power demand. Al2O3/water and MgO/water nanofluids are recommended for future applications.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Xiaoxin Zeng, Hao Yu, Tianbiao He, Ning Mao
Summary: This study analyzes the influence of combining nanofluid and flow disturbance structure on the heat transfer enhancement of a microchannel. A novel rectangular grooved microchannel (RGMC) is proposed, and its thermal performance using Al2O3/water nanofluids is investigated. The results show that the combination of nanofluid and groove structure significantly enhances the heat transfer of the microchannel.
Article
Engineering, Environmental
Hongqiang Chen, Yonghai Zhang, Lei Huang, Xiong Zhao, Xiang Ma, Zihuan Ma, Junsheng Hou, Jinjia Wei, Paolo Di Marco, Omid Mahian, Nanjing Hao
Summary: This article presents a simple and straightforward microfluidic strategy for synthesizing functional silica nanofluids with excellent stability. The use of these nanofluids in microchannel flow boiling significantly enhances the heat transfer coefficient and critical heat flux, providing a promising solution for thermal management in high-power electronics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Huajie Wu, Shanwen Zhang
Summary: Adjusting the nanoparticle volume fraction and aspect ratio of microchannels has a significant impact on improving the heat transfer capacity of nanofluids, but may increase the pumping power of the system; increasing the aspect ratio of microchannels effectively enhances the heat transfer capacity of heat sinks, but the heat transfer coefficient does not continue to increase beyond a certain value.
Article
Multidisciplinary Sciences
Yunzhu Li, Tianyuan Liu, Yonghui Xie
Summary: This paper proposes a deep learning model for thermal fluid fields reconstruction based on physics-informed deep learning method. The model improves physical interpretability by establishing a mapping function and introducing conservation laws. Experimental results demonstrate that the model accurately reconstructs physical fields and calculates performance characteristics.
SCIENTIFIC REPORTS
(2022)
Article
Thermodynamics
Juan Li, Hao Zhai, Lei Shi, Nongchao Tan, Yuyan Zhang, Cunwen Huang
Summary: This study experimentally investigated the convective boiling heat transfer characteristics of TiO2-H2O nanofluids in microchannels. The results showed that the average flow boiling heat transfer coefficient of TiO2-H2O nanofluids increased with the increase of the mass flow rate and nanoparticle size. The mass fraction of TiO2-H2O also had a significant influence on the deposition morphology and nucleation condition of the boiling surface.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2024)
Article
Thermodynamics
Zhaowei Xu, Ce Xu, Shuangquan Shao, Wei Xu, Zhichao Wang, Yichao Wang, Xiaoyu Sun, Qiang Yang
Summary: This study investigates a variable hysteresis control algorithm for the supply water temperature of an air-to-water heat pump system under varying outdoor air temperatures. Through field experiments, it was found that increasing the dead band can reduce cycling times, increase high-load-rate running periods, and improve system performance, resulting in significant energy savings.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Zhaowei Xu, Hao Li, Shuangquan Shao, Wei Xu, Zhichao Wang, Yichao Wang, Xiaoyu Sun, Qiang Yang, Ce Xu, Wenyuan Zhao
Summary: This paper presents a semi-theoretical model for fixed speed ASHP which considers various factors for accurate energy efficiency analysis. By statistical analysis of field monitoring data, the relationship between heat pump system efficiency and operating mode is successfully established.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Jianye Chen, Lei Xiao, Yimei Wu, Xu Gao, Hong Chen, Junlong Xie, Shuangquan Shao
Summary: This study explores the potential of reducing precooling cost in refueling stations through a composite hydrogen refueling process integrating a turbo-expander. Results show that the turbo-expander can reduce precooling energy consumption by 52.6% and lower infrastructure expenditure significantly. This indicates that the proposed process has remarkable potential in hydrogen fueling stations.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Hongwei Zhang, Xudong Geng, Shuangquan Shao, Chunqiang Si, Zhichao Wang
Summary: This paper investigates a R134a/CO2 cascade air source heat pump system for efficient and reliable heating in severe cold regions. The simulation model and experimental results demonstrate its excellent energy performance and ability to supply hot water with high COP under different working conditions.
Article
Thermodynamics
Jing Ding, Hainan Zhang, Dongmei Leng, Hongbo Xu, Changqing Tian, Zhiqiang Zhai
Summary: This paper proposes an integrated system of free cooling and heat recovery to reduce the energy consumption of data centers. Experimental results show that the system can switch smoothly between different modes and has good applicability in various cities in China, especially in northern cold cities.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Article
Thermodynamics
Zhaowei Xu, Hao Li, Wei Xu, Shuangquan Shao, Zhichao Wang, Xiaoxi Gou, Mingyang Zhao, Jiandong Li
Summary: This study analyzed the mechanism of partial load efficiency degradation and proposed a new method for characterizing the partial load factor. Experimental tests were conducted on low ambient temperature ASHPs with different configurations to verify the accuracy of the new method.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Review
Food Science & Technology
Dongmei Leng, Hainan Zhang, Changqing Tian, Hongbo Xu
Summary: This paper summarizes the low-temperature preservation techniques of four representative special foods in East Asia and provides recommendations for future research. The positive results will be helpful for the research and application of food preservation technologies in the future.
JOURNAL OF FOOD PROCESSING AND PRESERVATION
(2022)
Article
Engineering, Chemical
Qiang Li, Zhichao Wang, Shuangquan Shao, Zhiqiang Niu, Yalu Xin, Dan Zhao, Yinyan Hou, Zhaowei Xu
Summary: This study proposes an empirical equation model to predict the pressure drop of air filters based on experimental data and linear regression analysis. The results indicate that the predicted pressure drop values by the model are in good agreement with the experimental results, demonstrating its accuracy and reliability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Construction & Building Technology
Jiandong Li, Shuangquan Shao, Zhichao Wang, Gengxin Xie, Qingqin Wang, Zhaowei Xu, Lichao Han, Xiaoxi Gou
Summary: This article reviews the key role of air-to-air membrane energy exchangers (MEEs) in near-zero-energy building and green building. By optimizing the membrane, configuration, and operating conditions, the energy-recovery performance of MEEs can be significantly improved. The application of MEE technology is an effective way to reduce the energy consumption in buildings in the future.
ENERGY AND BUILDINGS
(2022)
Article
Engineering, Mechanical
Lichao Han, Shuangquan Shao, Zhichao Wang, Qiang Yang, Zhaowei Xu, Jiandong Li, Xiaoxi Gou, Jinpeng Suo
Summary: This study proposes a novel method for measuring the heating capacity of air source heat pumps. By installing an auxiliary electric heater and calculating the refrigerant mass flow rate based on energy conservation, the heating capacity can be accurately calculated. The experimental results show that this method has a high level of accuracy and has a minimal impact on the heating capacity of the heat pumps.
FLOW MEASUREMENT AND INSTRUMENTATION
(2022)
Article
Thermodynamics
Dongmei Leng, Hainan Zhang, Changqing Tian, Hongbo Xu, Peiru Li
Summary: This study investigates the effect of magnetic field on quality changes of frozen channel catfish under different freezing temperatures. The results show that the application of a static magnetic field can reduce the time spent at the maximum ice crystals formation stage, decrease weight loss, bring the pH value closer to fresh samples, and improve the hardness and chewiness properties of frozen fish.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Article
Thermodynamics
Minghong Yang, Baolong Wang, Xianting Li, Wenxing Shi, Shuangquan Shao
Summary: A general scroll compressor model with high accuracy, fast simulation speed, and good numerical robustness has been proposed in this study. Validation against experimental data shows that the model has cooling capacity errors of less than 3.5% and power consumption errors of less than 2.8% in various conditions.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Article
Thermodynamics
Yang Lulu, Xu Hongbo, Zhang Hainan, Chen Yiyu, Liu Ming, Tian Changqing
Summary: Battery thermal management is crucial for the safe and long-term operation of electric vehicles. Numerical simulation and experiments were conducted in this study to investigate the temperature field of Li-ion battery cells and modules, and the effectiveness of a battery thermal management system using micro heat pipe array (BTMS-MHPA). The results showed that the maximum temperature and temperature difference increased with the increase of charge/discharge rate. The BTMS-MHPA was proven to be capable of maintaining the working temperature range and temperature uniformity of the battery modules.
JOURNAL OF THERMAL SCIENCE
(2022)
Article
Construction & Building Technology
Hao Li, Yaohong Li, Zhichao Wang, Shuangquan Shao, Gaofeng Deng, Huiyu Xue, Zhaowei Xu, Yingxia Yang
Summary: This study proposed a model-based method for evaluating the performance of integrated building envelope, which can assess the energy saving effect of nearly-zero energy buildings through reverse parameter identification and forward load calculation. The applicability of the model was demonstrated through accuracy verification, sensitivity analysis, and uncertainty assessment, providing theoretical support for energy efficiency design.
ENERGY AND BUILDINGS
(2022)
Article
Engineering, Aerospace
Ri Wang, Sujun Dong, Hongsheng Jiang, Peiru Li, Hainan Zhang
Summary: The integrated thermal management system of aircraft is composed of multiple subsystems coupled with each other, requiring a special parameter-matching algorithm and appropriate optimization design method to improve system performance. Optimization results show that particle swarm optimization and genetic algorithm can effectively find the global optimal solution, with the particle swarm optimization method taking less time.
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)
