Article
Materials Science, Multidisciplinary
Jiaqi He, Jianlin Sun, Yanan Meng, Fulin Yang, Huajie Tang
Summary: The use of MoS2-Al2O3 nanofluid as a functional lubricant on the hot-rolled steel surface improved surface quality and corrosion resistance through the formation of a diffusion layer and reduction in surface defects.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Qiaozhi Zhang, Shuguang Xu, Yang Cao, Roger Ruan, James H. Clark, Changwei Hu, Daniel C. W. Tsang
Summary: This study focuses on the production of two organic acids, gluconic acid (GOA) and glucuronic acid (GUA), from biomass-derived glucose using microwave-assisted catalytic oxidation. It demonstrates that the synthesis conditions of the Cu-based catalysts can be adjusted to improve the yield of the desired products. The study also provides insights into the reaction pathways using density functional theory simulation. These findings are valuable for the design of low-cost and efficient catalysts for glucose oxidation.
Article
Engineering, Environmental
Mengzhao Li, Liping Ren, Zheng Gu, Penghao Gao, Wenbo Sun, Xiaole Dong, Futang Liu, Bingquan Wang, Zijian Zhang, Xinpeng Liu, Peiling Gao
Summary: By constructing a nanofluid system, trace functionalized nanoparticles can greatly enhance the absorption performance of basic liquid. In this study, amino functionalized carbon nanotubes (ACNTs) and carbon nanotubes (CNTs) were introduced into alkaline deep eutectic solvents to form nanofluid systems and used for dynamic H2S absorption. The results showed that the introduction of nanoparticles significantly improved the H2S removal efficiency of the original liquid. The highest total mass transfer coefficient of the ACNTs nanofluid system increased to over 400% of the value before the addition of nanoparticles. The amino functionalization greatly enhanced the shuttle effect of nanoparticles.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Thermodynamics
Atul Ranjan, Israr Ahmad, Rinku Kumar Gouda, Manabendra Pathak, Mohd Kaleem Khan
Summary: This study reports the creation of Cu(OH)2 nanoneedles on a copper surface using an anodization process, which can enhance critical heat flux (CHF) limit in pool boiling applications by improving surface wettability and wickability. Results show that the anodized surface requires higher wall superheat for nucleation and exhibits a higher CHF value compared to the plain surface.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Chemistry, Physical
Dana H. Abdeen, Muataz A. Atieh, Belabbes Merzougui
Summary: Experimental results showed that corrosion rate of 316L stainless steel increases with higher temperature and higher concentration of CNTs-water nanofluids. Additionally, CNTs were observed to desorb at higher temperatures, making the steel surface more vulnerable to corrosion attack.
Article
Materials Science, Multidisciplinary
Xiaogang Li, Zhipeng Cai, Xin Chen, Shuqing Dong, Wenhe Cai, Xiaoming Shi, Chaoyu Han, Yu Zhang, Kejian Li, Jiluan Pan
Summary: The interfacial microstructures of ex-service dissimilar metal weld between austenitic stainless steel and low alloy ferritic steel were studied, revealing an ultra-fine grain band at the nickel-based weld metal/Low alloy steel interface. These ultra-fine grains were ferrite transformed from pre-existing martensite layer, triggering interfacial oxide notch and increasing the risk of interfacial cracking. This study provides new insights into the premature failure of such type of dissimilar metal welds.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Sixtos Antonio Arreola-Villa, Hector Javier Vergara-Hernandez, Gildardo Solorio-Diaz, Alejandro Perez-Alvarado, Octavio Vazquez-Gomez, Gerardo Marx Chavez-Campos
Summary: The high-temperature surface oxidation kinetics of low-carbon steel were studied using a heating device. The growth rate of the oxide layer at different temperatures was measured and compared with literature values.
Article
Materials Science, Multidisciplinary
Hongwan Jiang, Zhongwei Ren, Yanliang Yi, Lin He, Sen Yuan
Summary: Machining significantly improves the hardness of the superficial layer of high-strength alloy steel, while also enhancing its toughness, due to the combined effect of fine-grain strengthening and dislocation strengthening during the machining process.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Suphitsara Maturost, Suwaphid Themsirimongkon, Paralee Waenkaew, Napapha Promsawan, Jaroon Jakmunee, Surin Saipanya
Summary: The research on electrocatalytic oxidation of methanol, ethanol, and formic acid using a nanocomposite catalyst consisting of multi-wall carbon nanotubes, copper oxide, and platinum nanoparticles has shown promising results in improving low-temperature fuel cell applications. The addition of copper oxide significantly enhances the electroactivity towards oxidation reactions, making the 1Pt-3CuO/CNT electrocatalyst a capable candidate for fuel cell applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Danial Jafari Farsaani, Elham Ameri
Summary: A single bubble absorption column was used to investigate the hydrodynamic effect on the absorption of CO2 and H2S using water-based nanofluids dispersed with multiwall carbon nanotubes. The study found that the NH2MWCNTs /nanofluid with a 0.5 wt% content achieved the highest absorption of CO2 and H2S.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Lucie Korena, Vaclav Slovak, Gabriela Zelenkova, Tomas Zelenka
Summary: The effects of porosity and particle size on carbon surface oxidation were investigated. Carbon xerogels with different porosity and particle size were prepared and characterized. Isothermal thermogravimetry experiments showed that particle size and porosity significantly influence diffusion and heat transfer during carbon oxidation. The apparent kinetic parameters were determined, and it was found that porosity and particle size do not affect the basic chemical reactions occurring on the carbon surface during oxidation.
Article
Green & Sustainable Science & Technology
Jing Ni, Zhi Cui, Can Wu, Jingbo Sun, Jiangheng Zhou
Summary: This study found that nanofluid containing 160 mg Carbon nanoparticles can provide better lubrication effect and surface quality during broaching process, reducing the average broaching load peak and load valley, as well as the root mean square error (RMSE) of broaching vibration signal.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Mechanical
T. W. Yin, Y. F. Shen, W. Y. Xue, N. Jia, Y. J. Li
Summary: A novel strategy is proposed to break through the trade-off between strength and ductility in metallic materials by controlling the selection of martensitic variant. By applying two-stage mechanical processing and subsequent compression, a high-strength low-carbon steel with the best combination of strength and ductility is obtained. The use of variant selection leads to the formation of a large number of fine martensitic laths and nanoscale twins, resulting in enhanced strength and ductility.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Chemistry, Physical
Hu Li, Fei-Xiang Tian, Qi Liu, Yi-Fan Han, Minghui Zhu
Summary: Copper-cerium catalysts are commonly used for the oxidation of CO. This study prepared CuO/CeInOx catalysts and found that the inclusion of In dopants improved the catalyst's activity. The Cu/Ce90In10Ox catalyst showed excellent CO oxidation activity at low temperatures.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Rui Lu, Guangxin Wu, Jieyu Zhang
Summary: An environmentally friendly gaseous reduction method was used to remove the oxide scale of steel, with isothermal hydrogen reduction of high-strength steel investigated at temperatures ranging from 500°C to 800°C. Results indicated a transformation in the oxide phase composition with temperature, leading to changes in surface morphology and pore size. The addition of carbon to the reduction system promoted the reduction process, reducing energy consumption in steel production.
JOURNAL OF CLEANER PRODUCTION
(2021)
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)