Article
Energy & Fuels
Rafael da Silveira Borahela, Rejane De Cesaro Oliveskib, Flavia Schwarz Franceschini Zinanic, Ionatan Anton Schroerd
Summary: This study investigated the effects of fin geometric configurations in the melting process of lauric acid PCM numerically. Results showed that perforated fins decreased melting time by approximately 18% compared to solid fins at a fixed inclination of 150°. The most significant reduction in total melting time, approximately 40%, was achieved with the vertical positioning of fins, which would be the simplest to implement in practice.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Peiliang Yan, Weijun Fan, Yan Yang, Hongbing Ding, Adeel Arshad, Chuang Wen
Summary: Phase change material has great potential as an energy storage material in thermal energy storage systems, but its low thermal conductivity limits its applications. This study investigates the effect of different Y-shaped fin structures and HTF on the melting time of phase change material. The results show that adjustments to the fin structure can effectively reduce the melting time under certain operating conditions.
Article
Energy & Fuels
Sudhanshu Pandey, Se Hyun Kim, Seong Hyun Park, Man Yeong Ha
Summary: This study investigates the thermal energy storage performance of a latent heat thermal energy storage system with three angled fins. The results show that the angle of inclination of the fins has a significant impact on heat transfer characteristics and energy storage performance. An optimal fin angle for maximum energy storage performance is identified.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
H. Masoumi, R. Haghighi Khoshkhoo, S. M. Mirfendereski
Summary: In this study, the melting/solidification process of nano-enhanced phase change materials (NePCM) was investigated using experimental and numerical methods. The results showed that using longitudinal fins in the heat exchanger significantly reduced the time required for melting and solidification, while adding nanoparticles had a positive effect only in the unfinned tube heat exchanger.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Junfei Guo, Zhan Liu, Zhao Du, Jiabang Yu, Xiaohu Yang, Jinyue Yan
Summary: The novel hybrid fin-foam structure shows superior thermal performance compared to other competing structures, significantly reducing complete melting time and improving temperature response rate. Metal foam helps improve temperature field uniformity, while fins have a greater impact on uniformity.
Article
Thermodynamics
Zaher Ramadan, Thanh Phuong Nguyen, Chan Woo Park
Summary: This study investigated the effects of fin configurations and operating conditions on the thermal performance of a shell-and-tube system assisted by fins using computational fluid dynamics. The results showed that increasing the fin thickness and the inlet temperature of the heat transfer fluid significantly enhanced the heat transfer rate of the system.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Construction & Building Technology
Abdelkoddouss El Majd, Zohir Younsi, Nicolas Youssef, Naoual Belouaggadia, Abdeslam El Bouari
Summary: This research focuses on the use of microencapsulated phase change material (MPCM) in bio-based textiles to improve the energy performance of the building envelope. Through various tests, it is concluded that MPCM has good thermal stability and thermo-regulating properties, making it suitable for bio-based insulation materials.
ENERGY AND BUILDINGS
(2023)
Article
Thermodynamics
Guoqiang Wu, Sheng Chen, Sibo Zeng
Summary: Mechanical vibration can enhance heat transfer of thermal systems, with factors such as frequency and orientation affecting melting processes. Low frequency vibration accelerates melting, while higher frequency has a weaker acceleration effect. Vibration axis parallel to gravity results in the fastest thermal response rate.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Ci Ao, Suying Yan, Xiaoyan Zhao, Na Zhang, Yuting Wu
Summary: Improving the heat transfer performance of the heat exchanger can enhance the heat storage efficiency of the latent heat storage device. A novel annular fin with inclined angle is designed and welded to the inner tube wall of the heat exchanger to enhance heat transfer. Simulation results show that non-uniformly distributed fins reduced the total melting time of stearic acid by 53.13% and 20.54%, indicating that the addition of non-uniformly distributed annular fins with 70 degrees inclination improved heat transfer and reduced heat storage time significantly.
JOURNAL OF ENERGY STORAGE
(2023)
Review
Energy & Fuels
Shengqi Zhang, Simone Mancin, Liang Pu
Summary: Latent Thermal Energy Storage (TES) is recognized as a promising heat storage technology. Specifically, the development and optimization of finned-tube TES systems, including different fin shapes and additional enhancement techniques, are reviewed to provide fundamental information for further advancements. The review indicates that longitudinal and annular fins have been the focus, while helical fins and topologically optimized fins show great research potential. Additionally, it is suggested that additional enhancement techniques can further improve the heat transfer rate of PCMs in the TES system.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
R. A. Nicholls, M. A. Moghimi, A. L. Griffiths
Summary: This study investigates the impact of fin type and orientation on the charging and discharging processes of a horizontal concentric filled with phase change material. The results show that the performance is significantly improved with the use of transversal corrugated fin design. The melting process is mainly influenced by natural convection, while conduction is the main mode of heat transfer in the solidification process. The transversal corrugated fin design outperforms other cases in terms of melting time reduction, and the overall processing time is significantly shorter.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Peiliang Yan, Weijun Fan, Yu Han, Hongbing Ding, Chuang Wen, Anas F. A. Elbarghthi, Yan Yang
Summary: In this study, the effect of a novel leaf vein bionic fin's different structures and tube arrangements on the complete melting time of phase change materials (PCM) in a triplex-tube thermal energy storage (TES) system was investigated. The simulation results showed that the novel fins can significantly reduce the duration of complete melting. Increasing the fin angle from 30 degrees to 60 degrees and adjusting the fin arrangement can further reduce the complete melting time. The proper fin arrangement can improve the heat transfer performance of the PCM.
Article
Energy & Fuels
Muhammad Shahid Shafiq, Muhammad Mahabat Khan
Summary: This study focuses on numerically investigating the performance enhancement of a rectangular dual-wall-heated Latent Thermal Energy Storage Unit (LTESU) embedded with 12 horizontal fins. By optimizing the fin design, employing the enthalpy-porosity model for simulations, and studying different enclosure aspect ratios, the exponential fin configuration is found to be the most effective in improving the melting and energy storage performance of the phase change material.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Nidhal Ben Khedher, Nirmalendu Biswas, Hussein Togun, Hayder I. Mohammed, Jasim M. Mahdi, Raed Khalid Ibrahem, Pouyan Talebizadehsardari
Summary: This study aims to improve the melting performance of a vertical latent heat double-pipe heat exchanger by modifying the geometry of the phase change material (PCM) container. Different framed structures embedded in the outer tube were examined and compared, and the effects of different numbers of pitches were also evaluated. The results showed that using a smooth framed structure for the PCM container significantly reduced the melting duration and improved the thermal energy storage rate.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Seyedmohsen Baghaei Oskouei, Ozgur Bayer
Summary: A novel method is proposed to overcome the low thermal conductivity issue of phase change materials (PCMs) in horizontal latent thermal energy storage (LTES) systems. By designing bypassing tubes that redirect the flow of heat transfer fluid to the slowest melting area, the charging time is reduced. The effect of parameters like the lengths, radial distance, and mass flow rate ratio of the bypassing tubes on the charging rate, charging efficiency, and heat transfer is investigated.
JOURNAL OF ENERGY STORAGE
(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)