Article
Energy & Fuels
Sunnykumar Patel, Syeda Humaira Tasnim, Shohel Mahmud
Summary: This study presents a novel approach of charging PCM inside toroidal tubes in LHTES system. Numerical investigations reveal that fin orientation plays a dominant role in enhancing heat transfer. In the toroidal tube LHTES system, correctly oriented fins provide higher rate of energy storage and save melting time.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Mahmoud M. Selim, Hasan S. Majdi, Ali Basem, Awad Mousa, Abed Saif Alghawli
Summary: This study analyzes freezing phenomena within an enclosure with tilted fins using a non-equilibrium phase change material with nanoparticles and water. The role of particle type on thermal conductivity is considered. The buoyancy term has no significant impact on solidification, so the energy equation with unsteady source term is assumed as the main equation. The use of platelet particles and increased particle fraction enhance the freezing rate.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Mechanics
Ben Ma, Xiaoying Zhang, Lei Wang, Kun He, Dinggen Li
Summary: This paper discusses the improvement of melting performance in latent heat thermal energy storage systems with fractal tree-shaped fins through lattice Boltzmann simulation. The presence of tree-shaped fins significantly enhances the melting performance, especially in the early stage of melting process. The results also show that the branch level, length ratio, and width ratio of tree-shaped fins affect the melting efficiency.
Article
Green & Sustainable Science & Technology
Shouxi Jiang, Yongping Huang
Summary: To overcome the low energy efficiency of phase-change thermal storage technologies, this study proposes a novel leaf-like fin and a bioinspired latent heat exchanger (LHE) using phase change materials (PCMs). The results demonstrate that the innovative leaf-like fin significantly enhances the discharge performance, reducing the complete solidification time by 41.6% and increasing the average discharge power by 69.9% compared to conventional LHEs. Moreover, optimal material selections and operating conditions are recommended to further improve the heat discharge performance of PCMs.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Thermodynamics
Akshat Patel, Vivek Kumar Singh
Summary: This study aims to improve the energy release and storage rate of PCM heat sinks by employing a novel PCM heat sink with double-sided spiral fins. The results show that increasing the diameter and length of the fins reduces the critical temperature and time taken to reach initial conditions. The best configuration of spiral fins reduces the critical temperature and time by 7 K and 19 mins, respectively, compared to traditional pin fins.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Multidisciplinary Sciences
Adel Almarashi, Amira M. Hussin, M. Mirparizi, Chunwei Zhang, Hosam A. Saad
Summary: In this study, the effect of different shapes and concentrations of nanoparticles on solidification speed was investigated. The results showed that adding nanomaterials and using blade-shaped particles can significantly accelerate the freezing process.
SCIENTIFIC REPORTS
(2022)
Article
Mechanics
Ben Ma, Xiaoying Zhang, Lei Wang, Kun He, Dinggen Li
Summary: By using lattice Boltzmann simulation, this paper discusses the improvement of melting performance of phase change material (PCM) in latent heat thermal energy storage (LHTES) systems with fractal tree-shaped fins. The presence of tree-shaped fins significantly improves the melting performance, and the branch level, length ratio, and width ratio of the fins all have important influences on the melting performance.
Article
Energy & Fuels
Prashant Saini, Atul Dhar, Satvasheel Powar, Mrityunjay Doddamani
Summary: The use of Phase Change Materials (PCMs) enhances the availability of solar energy by storing a large amount of energy in a small volume. However, the poor thermal conductivity of PCMs limits their energy storage capabilities. This study improved the solidification rate of PCM in the LHTESS by combining novel fin arrangements, nanoparticles, and metal foam.
Article
Thermodynamics
Nidhal Ben Khedher, Rashad A. Bantan, Lioua Kolsi, Mohamed Omri
Summary: This paper investigates the performance of a heat storage device using Nano-Enhanced PCM and finned structure through experimental and numerical simulations. The results show that NEPCM significantly improves the charging and discharging rates of the heat storage device, and the addition of inner and outer longitudinal fins further enhances the performance. Using 2% Al2O3 nanoparticles can achieve nearly the same results as using 1% CNT, and is more cost-effective.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Mohammad Abdolahimoghadam, Masoud Rahimi
Summary: In this study, the heat storage performance of nano phase change material (nPCM) was investigated. It was found that the addition of different nanoparticles can decrease the duration of melting and solidification processes. The thermal conductivity, density, and heat capacity properties play important roles in the melting process, while thermal conductivity is critical for solidification. Graphene nanoplatelet showed the highest heat transfer coefficient among all the nanoparticles studied. This study provides valuable insights for developing more efficient thermal energy storage systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Rajendran Prabakaran, Mohammad Salman, Poongavanam Ganesh Kumar, Dongchan Lee, Sung Chul Kim
Summary: This study investigated the evaporation heat transfer coefficient and two-phase frictional pressure drop of R1234yf in a brazed plate heat exchanger with offset strip fins. The results showed that the evaporation heat transfer coefficient was significantly influenced by the mass flux and vapor quality, while the two-phase frictional pressure drop increased with the mass flux, vapor quality, and heat flux, but decreased with the saturation temperature. New correlations were proposed for forecasting the Nusselt number and friction factor of R1234yf with reasonable accuracy.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Ahmad Vaisi, Kourosh Javaherdeh, Rouhollah Moosavi
Summary: The experimental study focused on investigating the effect of different geometrical parameters of wavy and strip fins in a three-fluid plate-fin compact heat exchanger on the condensation heat transfer. The results showed that the two-phase flow pattern in the wavy channels of the middle heat exchanger is stratified and wavy.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Mohammad Salman, Rajendran Prabakaran, Poongavanam Ganesh Kumar, Dongchan Lee, Sung Chul Kim
Summary: An inclusive experimental study was conducted to explore the features of heat transfer coefficient and frictional pressure drop of R290 in a brazed plate heat exchanger. The findings revealed that nucleate boiling dominated at lower vapor qualities, while convection-dominated at higher vapor qualities. Empirical correlations for Nusselt number and friction factor were developed for R290 with a mean absolute error of 10% and 14% respectively, taking into account the influence of equivalent and liquid Reynolds numbers and the liquid and vapor densities.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Mohammad Salman, Rajendran Prabakaran, Dongchan Lee, Sung Chul Kim
Summary: This study experimentally investigated the saturated flow boiling characteristics of R290/R1270 mixture and pure R290 in a plate heat exchanger with offset strip fins. The results showed that convection dominated the boiling process at higher vapor qualities, while nucleate boiling dominated at lower vapor qualities. The heat-transfer coefficient and frictional pressure drop of R290/R1270 were strongly influenced by the mass flux range. Correlations for R290/R1270 in the form of Nusselt number and the two-phase friction factor have been established with high reliability.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Joao Passaro, A. Rebola, L. Coelho, J. Conde, G. A. Evangelakis, C. Prouskas, D. G. Papageorgiou, A. Zisopoulou, I. E. Lagaris
Summary: This study investigates the heat exchange process of a latent heat thermal energy storage system equipped with a compact finned tubes heat exchanger. Numerical simulations were conducted to evaluate the performance of the energy discharge process under different fin pitch values and PCM thermal properties. The results show that the addition of graphene nanoparticles significantly enhances the PCM thermal conductivity, while applying thin fins effectively enhances the discharge performance of the system.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
A. Nikoozadeh, A. Behzadmehr, S. Payan
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2020)
Article
Engineering, Mechanical
Mojtaba Hosseini, Ali Hatami, Samira Payan
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2020)
Article
Thermodynamics
M. Pakdaman, S. Payan, S. M. H. Sarvari, S. Mohammadpour
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2020)
Article
Energy & Fuels
I. Sarani, S. Payan, A. Payan, S. A. Nada
JOURNAL OF ENERGY STORAGE
(2020)
Article
Thermodynamics
S. Parsaee, S. Payan, A. Payan
Summary: This study investigates the effect of different parameters on heat transfer and fluid flow, finding that increasing optical thickness and Hartmann number, as well as changing the absorption coefficient, leads to a 10.5% decrease in average Nusselt number. The study also shows that the impact of Rayleigh number on heat transfer is independent of the absorption coefficient change, with constant Nusselt number difference at high Hartmann numbers.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Engineering, Multidisciplinary
Samira Payan, Sameh A. Nada, A. H. Sarhaddi
Summary: This study examines the increase or decrease of heat transfer through a rectangular enclosure by optimizing the inclination angle and the parameters of a thin fin. Results show that heat transfer can be significantly increased or decreased by adjusting the fin parameters and inclination angle under different conditions.
JOURNAL OF ENGINEERING RESEARCH
(2021)
Article
Thermodynamics
M. Sanchouli, S. Payan, A. Payan, S. A. Nada
Summary: This paper investigates the enhancement of thermal performance of phase change material in a double-tube heat exchanger using new grid annular fins. The study shows that the new grid fins can reduce melting time and increase energy storage when the fin spacing is optimized. The importance of the arrangement of grid annular fins components is demonstrated, and the non-uniform distribution of grids is considered for improved performance.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Ali Hatami, Samira Payan, Mojtaba Hosseini
MECHANICS & INDUSTRY
(2020)
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)
