Article
Green & Sustainable Science & Technology
Krzysztof Polaczek, Maria Kuranska, Aleksander Prociak
Summary: This article discusses the potential of using used cooking oil as a feedstock for producing open-cell polyurethane foam. The study focuses on the effects of bio-polyol properties on the properties of the final foam, and the key step in the synthesis of bio-polyols. The results show that the foams produced using used cooking oil-based polyols have comparable properties to commercial products.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Leonardo Lachi Manetti, Iago Lessa de Oliveira, Elaine Maria Cardoso
Summary: In this study, the thermal efficiency of open-cell metal foams was evaluated through numerical simulations and pool boiling experiments. The influence of foam thickness and dielectric fluids on the efficiency was compared. The results showed that thinner foams exhibited higher efficiency, and the efficiency under ethanol pool boiling was lower than under HFE-7100. The pin fin model with adiabatic tip showed the smallest error and can be used as a reference for design.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
P. Ganesan, Fathiah Zaib, Tuan Zaharinie, Moghtada Mobedi, N. Gnanasekaran
Summary: This study investigated the thermal resistances of sandwich structures consisting of metal foams, base plates/surfaces, and thermal interface materials (TIMs). The results showed that the thermal resistances decreased with increasing compression forces and varied among different types of TIM materials.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Tian Xiao, Xiaohu Yang, Kamel Hooman, Tian Jian Lu
Summary: Analytical models of permeability and effective thermal conductivity for open-cell metallic foams can be developed using fractal theory, which is more suitable for dealing with the random pore morphology of the foam. The fractal models can better characterize the randomness of pore distributions in the foam compared to previous models built upon simplified geometries.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Bora Ye, Sunjung Kim
Summary: Cu-Sn alloy foams were fabricated by Cu/Sn coelectrodeposition onto a polyurethane template in an alkaline electrolyte with a citrate complexing agent, followed by a thermal treatment for PU removal in a N-2 gas environment. The foams mainly consisted of Cu matrix, Cu6Sn5, and Cu3Sn intermetallic compounds. The chemical phase change of Cu-Sn alloy foams and its influence on electrical resistance were studied with varying heating temperature and N-2 gas flow rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Anirban Changdar, Ankit Shrivastava, Shitanshu Shekhar Chakraborty, Samik Dutta
Summary: This study investigates the thermal forming of high-porosity aluminum foam using a diode laser and explores the effects of laser parameters, scan path characteristics, and foam thickness on the bending angle achieved. The results show that laser forming can produce both developable and nondevelopable surfaces on the open cell aluminum foam, and different laser parameters have an impact on the forming results.
JOURNAL OF LASER APPLICATIONS
(2022)
Article
Thermodynamics
Prabha Samudre, Satish Vasu Kailas
Summary: This paper investigates the thermal performance of foam/foam-fin heat sinks produced through a fused bonding method. The results show a significant reduction in thermal contact resistance and an increase in heat transfer rate per unit mass compared to epoxy-glued heat sinks.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
X. M. Ren, Ming Zhang, Hong Nie
Summary: This paper introduces a multilayer thermal protection system with phase change material to optimize heat performance and structure design, and through numerical analysis, the optimal designs that reduce temperature, lighten mass, and minimize size are identified.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Xianlong Zhang, Yuqing Wang, Yuanhong Wang, Bing Liu, Xiaohui Bai
Summary: This paper investigates the thermal protection system in a combustion chamber of a ramjet, focusing on the pyrolysis characteristics of carbon-phenolic material and its influencing factors. Through experimental studies and numerical simulations on carbon-phenolic composites, the changes in their performance under high temperatures and the thermal insulation effects were analyzed.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Mohammad Almajali
Summary: A mathematical model was developed to predict the effective thermal conductivity of coated metal foam, showing that as coating thickness increases, porosity decreases and thermal conductivity increases.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Thermodynamics
Guangpeng Feng, Lin Qiu, Yanhui Feng, Xinxin Zhang
Summary: A topology optimization framework based on isotropic material is developed to design highly thermal conductive porous structures. The study shows that by optimizing the microstructure, it is possible to achieve thermal conductivity and mass diffusivity close to theoretical bounds. The selective laser melting technique enables the accurate fabrication of the microstructure of these lattice materials.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Anuj Kumar, Rohit Kothari, Santosh K. Sahu, Shailesh Kundalwal
Summary: Experimental investigation on the thermal performance of PCM-based heat sinks reveals that HS with PCM has advantages in operating time and reduced temperature at a certain heat flux value, with HS based on CF showing even more significant improvement. Utilization of the VIKOR method for multi attribute decision-making optimization suggests that PCM-based HS with CF is effective for cooling electronic components.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
F. C. Durmus, L. P. Maiorano, J. M. Molina
Summary: Recent advances in cellular materials for active thermal management involve the integral design of their porous structure. This study develops open-cell aluminum foams with porosities in the range of 0.60-0.76, which contain pores with spherical geometry and a bimodal pore size distribution. The fabrication strategy includes replication method and water dissolution, and the materials are characterized using analytical schemes and computational fluid dynamics simulations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Engineering, Environmental
Stefano E. Zanco, Matteo Ambrosetti, Gianpiero Groppi, Enrico Tronconi, Marco Mazzotti
Summary: Experimental and modeling analysis shows that using packed open-cell foams as an alternative to standard packed bed configuration can achieve faster temperature transitions and reduce temperature gradients within the adsorption bed. Even though there is a loss of sorbent inventory with the presence of foam, higher process productivity is achieved due to faster temperature swings and more homogeneous temperature distribution within the adsorption columns.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Aitor Amatriain, Corrado Gargiulo, Gonzalo Rubio
Summary: A multiscale model for open-cell foams has been developed for characterization of heat exchangers. It is applicable to a wide range of materials, cell sizes, and porosities. The model accurately predicts the thermal performance of macroscopic systems based on microscopic geometries and parameters.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(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)