Article
Green & Sustainable Science & Technology
Ali Tavakoli, Mahmood Farzaneh-Gord, Amir Ebrahimi-Moghadam
Summary: This study evaluates the thermo-hydraulic performance of utilizing sinusoidal internal fins and phase change material (PCM) in LHTES systems. A numerical framework is developed to analyze the geometrical parameters of the fins and investigate different heat transfer and thermodynamic characteristics. The results show that the highest growth of liquid fraction and the lowest entropy generation are achieved in case 4, with H/L = 0.125 and a thickness of 3mm, compared to a case with simple straight fins.
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
Muhammad Aurangzeb, Fahad Noor, Adnan Qamar, Asad Naeem Shah, Poom Kumam, Zahir Shah, Meshal Shutaywi
Summary: This study investigates the feasibility of using nano phase change materials composites to improve the slow thermal response of latent heat thermal energy storage systems. The results show that seeding nanoparticles in PCM enhances heat transfer, with carbon nanotubes performing the best. Economic and environmental analysis also reveals that carbon nanotubes in RT26 have the highest economic and environmental viability.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Hakan F. Oztop, Hakan Cosanay, Nirmalendu Biswas, Fatih Selimefendigil
Summary: This study analyzed the melting of phase change materials (PCMs) in a closed space heated from the bottom wall. The performance of a system with PCM containers and fins was assessed by solving governing equations using the finite volume technique. It was found that the inclusion of PCM containers effectively utilized waste heat and modulated the thermal transport process significantly.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Farhad Afsharpanah, Masoud Izadi, Farzam Akbarzadeh Hamedani, Seyed Soheil Mousavi Ajarostaghi, Wahiba Yaici
Summary: Latent thermal energy storage units are widely used but suffer from slow phase change. Current research focuses on using enhancement techniques, such as porous foams, fins, and nanomaterials. Experimental results show that copper foam performs best in accelerating the phase change rate of the storage unit.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Mohammad Ghalambaz, Seyed Abdollah Mansouri Mehryan, Masoud Mozaffari, Obai Younis, Aritra Ghosh
Summary: The study optimized the design of thermal energy storage unit using a combination of optimum fin design and nanoadditives, resulting in an improved melting rate. Results showed that long fins should be mounted at the bottom and short fins at the top, an increase in the volume fraction of nanoparticles improves the melting rate.
Review
Thermodynamics
Allan Takudzwa Muzhanje, M. A. Hassan, Hamdy Hassan
Summary: Phase change material thermal energy storage is an effective solution for energy savings in air conditioning applications. This article reviews previous research works and analyzes energy saving approaches, providing best practices and recommendations for achieving cost cutting but accurate results. The potential benefits of integrating PCMs in air conditioning units include enhanced performance coefficient, energy savings, and reduced CO2 emissions.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Zhangmao Hu, Donglin Xue, Wei Wang, Hong Tian, Qian Yin, Yanni Xuan, Donglin Chen
Summary: This paper proposes and studies a spherical phase change material (PCM) capsule with embedded composite fins for latent thermal energy storage. A three-dimensional numerical model is established and validated, and the influences of the embedded fins with different structures, capsule size, and heating temperature on the melting performance are analyzed. The results provide useful guidance for the optimal design of thermal energy storage system with spherical PCM capsules.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Zakir Khan, Zulfiqar Ahmad Khan
Summary: Technological development in latent heat storage systems is crucial for energy security and management. Numerical analyses on a shell-and-tube-based system with enhanced fins and nano-additives show that extended fins are more effective than nano-additives. The optimal combination proposed in this study can significantly enhance heat transfer rates and thermal distribution.
Article
Chemistry, Multidisciplinary
Anuwat Jirawattanapanit, Aissa Abderrahmane, Abe Mourad, Kamel Guedri, Obai Younis, Belgacem Bouallegue, Khanyaluck Subkrajang, Grienggrai Rajchakit, Nehad Ali Shah
Summary: Thermal energy storage using phase transition materials is a popular technology. This study focuses on improving the weak thermal conductivity of these materials by researching different thermal enhancement techniques. A numerical model is developed to investigate the effects of using fins and nano-enhanced phase change materials. The study finds that using nano-enhanced phase change materials can significantly reduce the time required for total melting in a thermal energy storage system.
Article
Thermodynamics
Artur Szajding, Marta Kuta, Agnieszka Cebo-Rudnicka, Marcin Rywotycki
Summary: This paper proposes connecting a thermal energy storage (TES) with a phase change material (PCM) to a photo-voltaic (PV) installation in order to store excess energy. The TES with PCM was designed using an electric heater for charging and water for discharge. Numerical simulations confirmed the effectiveness of the designed TES, which utilized thin aluminium fins for fast heat transport and short charging time. The study also included measurements of energy produced by a 9.6 kWp PV installation in Southern Poland and economic analysis, which showed the feasibility of using a PV installation to charge a TES with PCM.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Arni M. Pornea, Hern Kim
Summary: A novel hierarchical SiO2/TiO2/polydopamine composite shell was synthesized to improve the solar-thermal conversion efficiency of encapsulated phase change materials, achieving efficient solar energy storage through light-driven localized heating. This composite shell enhances structural stability, durability, and promotes localized surface photo thermal effect in various PCM solar-thermal conversion applications.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Mohit Barthwal, Dibakar Rakshit
Summary: Thermal energy storage/sink is crucial for solar energy harnessing systems, with the challenge lying in developing a suitable system for long cyclic operation. This study analyzes the melting characteristics of PCM-based latent thermal energy storage, utilizing internal-external fins for better heat dissipation. Triangular and Y-shaped fins delay melting, with Y-shaped fins showing a larger suppression ratio.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Abdulkafi Mohammed Saeed, Aissa Abderrahmane, Naef A. A. Qasem, Abed Mourad, Muflih Alhazmi, Sameh E. Ahmed, Kamel Guedri
Summary: Thermal energy storage using latent heat and phase change materials is widely used in energy storage systems. This study discusses two primary thermal enhancement approaches, fins and nano-enhanced phase change material (NePCM), for a pear-shaped thermal energy storage system. By tuning the fin materials, shapes, and the concentration of nanoparticles, optimal heat transfer and acceleration of the phase change process can be achieved.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Sultan M. Alghamdi, Nidal H. Abu-Hamdeh, Meshari A. Al-Ebrahim, Hussein A. Z. AL-bonsrulah, Amira M. Hussin
Summary: This research investigates the melting phenomenon in a container with two different fin lengths (L*). The combination of RT35 and Cu nanoparticles is proposed as a nano-enhanced phase change material (NEPCM). The effects of adding Cu, L*, and Stefan number (Ste) are studied, using a computational approach based on a structural mesh for simulation. The results show that higher Ste and lower L* lead to more effective melting. The addition of 4% Cu nanoparticles to the pure PCM increases the liquid fraction (LF) by 15.80% after 900 seconds in a tube with L* = 5 and Ste = 0.17.
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)