Article
Thermodynamics
Mostafa Fathi, Mohammad Mahdi Heyhat, Mohammad Zabetian Targhi, Sajjad Bigham
Summary: Porous-fin microchannel heat sinks have the potential to improve the thermal and hydraulic performances of microelectronic cooling systems. However, the reduced effective thermal conductivity of porous fins compared to solid fins can negatively impact the thermal performance of the microchannel heat sinks. This research confirms that replacing solid with porous fins can simultaneously enhance the thermal and hydraulic performances of microchannel heat sinks.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Mustafa Yusuf Yazici, Mete Avci, Orhan Aydin, Adeel Arshad, Mark Jabbal
Summary: In this study, a new plate-fin geometry is proposed to improve the thermal performance of PCM-based heat sinks by changing the fin width ratio. The experimental results show that the proposed fin geometry can significantly enhance the cooling performance of the PCM-based heat sink.
APPLIED THERMAL ENGINEERING
(2023)
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
Energy & Fuels
Jalal M. Jalil, Hussein S. Mahdi, Asim S. Allawy
Summary: The effects of using phase change material (PCM) on heat sink cooling performance were investigated in this study. The experiments showed that the use of PCM significantly reduced the temperatures of the heat sink. Additionally, the study found that adding nanoparticles to the PCM improved heat sink performance.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
M. Mozafari, Ann Lee, Shaokoon Cheng
Summary: This study develops and optimizes a heat sink based on low melting point alloy for improved cyclic thermal shock resistance. The design parameters are determined using a combination of response surface methodology and numerical simulations. The experimental results show that the optimized heat sink significantly reduces the peak temperature after thermal shocks.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Kitti Nilpueng, Mehrdad Mesgarpour, Lazarus Godson Asirvatham, Ho Seon Ahn, Omid Mahian, Somchai Wongwises, Ahmet Selim Dalkilic
Summary: The study investigated the effects of different shapes, orientations, and distances on the air flow and heat transfer characteristics inside plate pin fin heat sinks. Results showed that under the same area, square pin fin heat sinks had higher heat transfer coefficient and pressure drop compared to circular pin fin heat sinks, while decreasing the distance led to an increase in heat transfer coefficient and pressure drop.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Su Ho Kim, Chang Sung Heu, Jin Yong Mok, Seok-Won Kang, Dong Rip Kim
Summary: The enhanced cooling performance of a phase change material (PCM)-integrated fin-type heat sink is reported in high power electronics. By embedding a phase change composite into the base plate of the heat sink, the thermal capacitive effects and excellent heat spreading characteristics of PCM are effectively utilized for thermal management. Experimental and numerical investigations show that the PCM-integrated fin-type heat sink can effectively delay the temperature rise of hot spots, demonstrating its potential for use in convection-limited cooling environments.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
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)
Article
Thermodynamics
Ahmet Ali Sertkaya, Mukaddes Ozdemir, Eyub Canli
Summary: In this study, pin fin and plate heat sinks were investigated in terms of natural convection and radiation heat transfer by experimental means. It was found that increasing the number of pin fins up to a threshold can improve thermal performance, but beyond that threshold, the thermal convection coefficient decreases significantly. Increasing the number of pin fins partly compensates the reduction in thermal convection coefficient by increasing the surface area up to a certain level.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Ahmed Alhusseny, Qahtan Al-Aabidy, Nabeel Al-Zurfi, Adel Nasser, Mohanad Aljanabi
Summary: The research employs highly-conductive graphite foams to dissipate heat in electronic components and proposes a novel heat sink configuration using staggered foam baffles to reduce pressure drop and improve heat dissipation. The study shows that the new heat sinks efficiently meet the thermal demands of high-performance electronic equipment, eliminate hot spots, and operate with reasonable pressure drop.
APPLIED THERMAL ENGINEERING
(2021)
Article
Construction & Building Technology
Wuyan Li, Zidong Li, Ling Xie, Yongcai Li, Tianhe Long, Sheng Huang, Jun Lu, Zhihao Wang
Summary: An experimental study was conducted to examine the thermal performance of a solar chimney integrated with a phase-change material (PCM). The study found that the inclination angle affects the airflow rate and phase change time of the chimney, while the heat flux has a small impact on the heat transfer inside the PCM. The solar chimney inclined at 45 degrees achieved the highest airflow rate.
ENERGY AND BUILDINGS
(2022)
Article
Engineering, Chemical
Oguzhan Ozbalci, Ayla Dogan, Meltem Asilturk
Summary: This paper investigates the heat transfer of different types of heat sinks used in electronic systems, and confirms the significant improvement provided by Al2O3-H2O nanofluid in heat dissipation.
Article
Energy & Fuels
S. R. Akhil Krishnan, Suresh Sivan, V. C. Midhun, Soumya Ranjan Behera
Summary: Advancements in PCM technology provide adaptable solutions for high heat dissipation in electronic devices. This study investigates the influence of NPG as a solid-solid phase transition PCM on the functionality of a heat pipe-assisted heat sink. Experimental and numerical analysis shows that the integration of PCM and heat pipe in the heat sink outperforms other configurations, with a maximum enhancement ratio of 3.29. The heat sink assembly with 99% PCM and heat pipe demonstrates the most significant results, while the assembly without heat pipe performs best for 66% PCM.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Daeyoung Kong, Yunseo Kim, Minsoo Kang, Erdong Song, Yongtaek Hong, Han Sang Kim, Kyupaeck Jeff Rah, Hyoung Gil Choi, Damena Agonafer, Hyoungsoon Lee
Summary: The study conducted a full 3D conjugated simulation to analyze the thermal and hydraulic performance of manifold microchannel heat sinks (MMCHSs), and designed twelve manifold geometries with different outlet directions and widths. The findings are important for enhancing the design performance of MMCHS.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Multidisciplinary Sciences
K. Naga Ramesh, T. Karthikeya Sharma, G. Amba Prasad Rao, K. Madhu Murthy
Summary: Heatsinks play a crucial role in thermal management, and microchannel heatsinks (MCHS) are considered the best choice for managing heat in electronic devices. This study improved the performance of MCHS by incorporating phase change material (PCM), resulting in the identification of the best performing heatsink model. The study also investigated the effects of liquid fraction and PCM position on the performance.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Construction & Building Technology
Yunus Emre Cetin, Mete Avci, Orhan Aydin
Summary: The study investigates the effect of air change rate on indoor particle dispersion and deposition in a ventilated room. Experimental and numerical analysis show that the contaminant level decreases with increasing air change rate for a constant particle flow rate, while the opposite trend is observed for a proportional particle flow rate.
INTERNATIONAL JOURNAL OF VENTILATION
(2022)
Article
Thermodynamics
Soner Birinci, Mehmet Saglam, Bugra Sarper, Orhan Aydin
Summary: This study investigates the effect of heaters' clearance on mixed convective cooling performance in a discretely heated horizontal duct. Results show that increasing the clearance can lead to a reduction in hot spot temperature and an improvement in the system's global conductance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Burak Markal, Ayse Candere, Mete Avci, Orhan Aydin
Summary: The combined influence of filling ratio, geometry, inclination angle, and heating power on heat transfer characteristics of pulsating heat pipes (PHPs) was investigated in this study, revealing the key roles of phase change phenomena and bubble dynamics in the thermal characteristics. It was concluded that non-uniform design can improve the operational performance of non-uniform PHPs by reducing the influence of gravity on the results.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Burak Markal, Ayse Candan Candere, Mete Avci, Orhan Aydin
Summary: Experimental investigation on the effect of double cross sectional ratio on performance characteristics of pulsating heat pipes shows that novel gradually constricted geometry boosts flow circulation and maintains stable performance. The newly designed pulsating heat pipe demonstrates better thermal performance than the conventional design.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Mehmet Tahir Erdinc, Arif Emre Aktas, Muhammet Nasif Kuru, Mehmet Bilgili, Orhan Aydin
Summary: This study investigated the thermo-hydraulic characteristics of circular and diamond shaped cross-sections in periodic flow using numerical methods and multi-objective genetic algorithm (MOGA) for optimization. The results showed that compared to circular geometries, the average Nusselt number of diamond shaped geometry increased by 10.11%, while pressure drop and volume decreased by 11.90% and 52.76%, respectively.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Bugra Sarper, Soner Birinci, Mehmet Saglam, Orhan Aydin
Summary: This study investigates the optimum heat generation rate of local heating elements with different heat generation rates in a vertical duct through experimental and numerical studies. The results show that a lower heat generation rate of heating elements improves the cooling performance of the system.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Burak Markal, Beyzanur Kul, Mete Avci, Ramazan Varol
Summary: This paper investigates the effect of gradually expanding flow passages on saturated flow boiling characteristics of micro pin fin heat sinks. The experimental results show that this design can significantly improve the two-phase heat transfer coefficient and suppress flow boiling instabilities.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Fatma Sahin, Ahmet Kaya, Erdem Alic, Orhan Aydin
Summary: This study investigates the effect of a mechanical agitator on heat transfer at pool boiling through experimental and numerical methods. The results show that increasing the number of agitator blades and reducing the distance between the agitator and the heater can significantly improve heat transfer efficiency.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Melisa Albayrak, Bugra Sarper, Mehmet Saglam, Soner Birinci, Orhan Aydin
Summary: This study investigates the influence of the jet-to-cross flow velocity ratio on convective heat transfer and flow characteristics in a channel with discrete heating modules. The study reveals that as the velocity ratio increases, the jet flow becomes dominant, leading to an increase in convective heat transfer and thermal enhancement factor.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
M. Tahir Erdinc, Cagri Kutlu, Saban Unal, Orhan Aydin, Yuehong Su, Saffa Riffat
Summary: This study proposes a renewable energy sourced and high-efficiency heat pump system which utilizes dual thermal sources (air and solar) to provide a renewable heating solution. By incorporating a PV/T collector and ejector technology, the system can achieve higher performance and reduce the demand from the grid.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Mustafa Yusuf Yazici
Summary: This study reports on an experimental investigation of a new hybrid preheating unit for small-scale li-ion modules exposed to low-temperature conditions. The results show that the preheating unit has a significant impact on the operation temperature, discharge, and energy capacity, improving the lifespan and safety of the li-ion modules.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Thermodynamics
M. Y. Yazici, M. Saglam, O. Aydin, M. Avci
Summary: The experimental study focuses on the melting heat transfer performance and energy storage efficiency of PCM/graphite matrix in a tube-in-shell setup for solar thermal energy storage and waste heat recovery applications. The inlet temperature of the heat transfer fluid had a significant impact on the total melting time. The results indicated that the PCM/graphite matrix showed remarkable effects on phase change heat transfer, with enhanced thermal conductivity and reduced melting time compared to conventional units.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Engineering, Multidisciplinary
Yunus Emre Cetin, Mete Avci, Orhan Aydin
Summary: The study investigates the effect of air change rate on particle dispersion for different contaminant source positions through experimental and numerical methods. It is found that pollutants outside the main flow region lead to significantly higher concentration values, and increasing the air change rate can drastically reduce pollutant concentration in this region.
JOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI
(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)
