Article
Thermodynamics
Salman Al Zahrani, Mohammad S. Islam, Suvash C. Saha
Summary: This study aims to enhance the thermal performance of the basic plate heat exchanger (FPHE) by proposing a new flow arrangement. Computational fluid dynamics simulations show that the modified FPHE has significantly higher Nusselt number and friction factor compared to the basic FPHE.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
L. Beckedorff, R. P. P. da Silva, G. S. M. Martins, K. de Paiva, J. L. G. Oliveira, A. A. M. Oliveira
Summary: This study presents an experimental and theoretical analysis of the flow and heat transfer characteristics of a plate and shell heat exchanger (PSHE). The results show that flow maldistribution increases the pressure drop and reduces the heat transfer performance of the heat exchanger. The overall performance of the shell side is inferior to the plate side, with higher maldistribution and lower Nusselt number. The study concludes that the thermo-hydraulic performance of the gasketed plate heat exchanger (PHE) is superior to the PSHE, but the PSHE is suitable for high pressure and high-temperature applications.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Ahmed M. Nagib Elmekawy, Alaa A. Ibrahim, Abdalrahman M. Shahin, Sara Al-Ali, Gasser E. Hassan
Summary: Attaching splitter plates to circular tubes in a heat exchanger can improve thermal performance by reducing pressure drop and increasing Nusselt number. However, the splitter plates should be as thin as possible for optimal performance. Increasing the thickness of the splitter plates slightly increases heat transfer but significantly increases pressure drop, while increasing the length of the splitter plates can double the heat transfer but also increase pressure drop.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Thermodynamics
Jun Yu, Lin Su, Kang Li, Mingkang Liu, Hua Zhang
Summary: The study investigates a parallel flow microchannel outside heat exchanger through experiments and numerical simulations, finding that increasing inlet pressure and airflow result in higher heat transfer rates. A modified Nusselt number correlation model is proposed for predicting heat exchanger characteristics, showing good agreement between modeling and experimental results.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Dong Ho Nguyen, Boyeon Kweon, Jae -Sung Kwon, Taewan Kim, Somchai Wongwises, Ho Seon Ahn
Summary: This article introduces an innovative plate heat exchanger design that utilizes symmetric airfoil profile corrugation, resulting in reduced pressure drop and improved heat transfer performance. A parametric study is conducted to determine the optimal geometric configuration.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Md Jahid Hasan, Shams Forruque Ahmed, Arafat A. Bhuiyan
Summary: This study investigates the heat transfer performance of a helical heat exchanger using nanofluids with different head-ribbed geometries and coil revolutions. The results show that the helical heat exchanger with 2 head ribbed and 30 coil revolution is the most effective design. The use of nanofluids enhances the heat transfer rate, with Al2O3 offering the highest heat transfer rate and SiO2 providing the lowest. The heat transfer rate improves with a decrease in the number of ribbed heads and an increase in coil revolutions.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Kitti Nilpueng, Tanachon Chomamuang, Mehrdad Mesgarpour, Omid Mahian, Somchai Wongwises
Summary: This study proposes a plate heat exchanger partially filled with metal foam and investigates the effects of mass flux, foam groove width, and pore density on heat transfer coefficient and pressure drop. The results show that reducing groove width and increasing pore density lead to higher heat transfer coefficient and pressure drop.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Review
Energy & Fuels
Wenguang Li, Zhibin Yu
Summary: This article presents a critical review of heat exchangers for cooled supercritical carbon dioxide flows, highlighting SCO2 heat transfer features, analyzing SCO2 heat transfer characteristics in detail, and summarizing SCO2 heat transfer enhancement methods.
Article
Thermodynamics
Sanil Shah
Summary: This study presents a numerical analysis of heat transfer between single and three inline circular jets impinging on a flat moving surface. The results show that velocity ratio and jet spacing significantly affect the Nusselt number distribution and flow field, with heat transfer dominated by surface motion for single jets with a velocity ratio greater than 0.75.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Rahul Ray, Aurovinda Mohanty, Pandab Patro, Kartik Chandra Tripathy
Summary: This study conducts a performance analysis of branched and interrupted fin heat sinks using numerical simulations to explore the possibility of enhancing heat transfer efficiency. The design that places the secondary fins symmetrically and at the farthest position from the base plate shows the best heat dissipation performance.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Mirza M. Shah
Summary: By comparing data from 25 sources, the study found that only 2 published correlations showed fairly good agreement with the data, while others had larger deviations. A new, more accurate and easier-to-use correlation was developed by modifying an existing one.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Thermodynamics
M. Basit Shafiq, Usman Allauddin, Mumtaz A. Qaisrani, Tauseef-ur-Rehman, Naveed Ahmed, M. Usman Mushtaq, Hafiz Muhammad Ali
Summary: This study investigated the improvement in thermal performance of heat exchangers through the combination of two passive techniques, nanofluids and coiled tubes. Numerical simulations showed that using nanofluids can increase the Nusselt number, especially in shell and helical coil tube heat exchangers.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Energy & Fuels
Qingzi Zhu, Mehdi Pishahang, Michael Bichnevicius, Caleb Amy, Mario Caccia, Kenneth H. Sandhage, Asegun Henry
Summary: Compact heat exchangers have gained attention in demanding applications. Flow maldistribution is traditionally believed to affect heat exchanger effectiveness, but recent research suggests that mismatch in maldistribution is the dominant factor. Matching the flow rates between fluid streams can improve heat exchanger performance.
Article
Thermodynamics
Abdolvahab Ravanji, Mehran Rajabi Zargarabadi
Summary: The study demonstrates that elliptical pin-fins are the most effective in cooling a heated flat plate, significantly decreasing local temperatures and increasing heat transfer efficiency.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Kim Leong Liaw, Jundika C. Kurnia, Agus P. Sasmito
Summary: This study investigates the convective heat transfer performance of Newtonian fluid in a helical twisted multilobe tube using computational fluid dynamics (CFD) simulations. The results show that the combination of number of lobes and tube twisting has a significant effect on the heat transfer coefficient, while increasing the number of lobes alone has a minimal impact. The helical coiled tube outperforms the straight tube within a certain range of Reynolds numbers, while twisting is recommended primarily for straight tubes.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Chemical
M. Rahman, Ming Zhao, Mohammad S. Islam, Kejun Dong, Suvash C. Saha
Summary: For respiratory health risk assessment, it is crucial to evaluate the transportation and deposition of pollutant particles in human lung airways. However, the understanding of the transportation and deposition of different pollutant particles in realistic airways is still limited.
Article
Thermodynamics
Maruf Md Ikram, Goutam Saha, Suvash C. Saha
Summary: This study investigates the transient analysis of thermal response and frictional loss characteristics for flow-modulated conjugate heat transfer phenomena. It explores the effects of different blade configurations on heat transfer and power loss in the flow domain. The results show that increasing the number of blades has a negligible impact on the heat transfer rate, and the three-blade modulator exhibits the lowest power loss coefficient and power instability.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Multidisciplinary
Huimin Cui, Haoran An, Wenyue Wang, Zhiming Han, Bo Hu, Feng Xu, Qingkuan Liu, Suvash C. C. Saha
Summary: In this study, the heat transfer characteristics of mixed convection in an open arc-shaped cavity with double heat sources were investigated using two-dimensional numerical simulation. The Reynolds number was varied by changing the inlet wind speed to study its influence on flow structures, transient characteristics, and heat transfer characteristics in the arc cavity. It was found that as the Reynolds number increased from 2.19 x 10(5) to 4.38 x 10(7), the flow evolved from turbulent flow to periodic flow and then to steady state flow. The critical Reynolds number intervals for different flow states were determined. The increase in Reynolds number enhanced heat convection in the cavity and increased the difference between heat convection and heat conduction in a linear relationship. However, the heat removal capacity in the middle region of the double heat sources was not always enhanced as the Reynolds number increased, due to the sudden change in flow structure and flow state around Re = 1.18 x 10(7).
APPLIED SCIENCES-BASEL
(2023)
Review
Energy & Fuels
Goutam Saha, Ahmed A. Y. Al-Waaly, Manosh C. Paul, Suvash C. Saha
Summary: This study is a systematic review that comprehensively analyzes the heat transfer performance in different kinds of cavities. It investigates the effects of various forces and different types of fluids on heat transfer in cavities. The review also covers validation techniques and mesh types used in numerical studies. The study examines 297 research articles and highlights the significant impact of obstacles and the use of nanofluids on enhancing heat transfer in cavities. Additionally, it suggests future research directions in this field and discusses the implications of the findings in various applications.
Article
Energy & Fuels
Suvash C. Saha, Shams ul Islam, Zahida Zia, M. Saleem, Shafee Ahmad
Summary: This study numerically investigates heat transfer enhancement in a partially thermally active rectangular enclosure filled with a ternary hybrid nanofluid. The effects of magnetic field strength and direction on natural convection flow are also explored. The findings show that nanoparticle volume fraction, Hartmann number, and heat generation coefficient significantly influence heat transfer enhancement, flow patterns, and temperature fields.
Article
Energy & Fuels
Amzad Hossain, Md. Mamun Molla, Md. Kamrujjaman, Muhammad Mohebujjaman, Suvash C. Saha
Summary: In this study, the numerical investigation of magneto-hydrodynamic mixed convection flow and entropy formation of non-Newtonian Bingham fluid in a lid-driven wavy square cavity filled with nanofluid was conducted using the finite volume method (FVM). The results indicate that within the given parameter range, Reynolds number and nanoparticle volume fraction have a positive impact on the average Nusselt number (Nu over bar ), while Hartmann number and Bingham number have a negative impact on it. The entropy generation is also affected by these parameters.
Review
Green & Sustainable Science & Technology
Fadi Alsouda, Nick S. Bennett, Suvash C. Saha, Fatemeh Salehi, Mohammad S. Islam
Summary: Air conditioning and refrigeration are essential in modern life and contribute over 7.8% to global greenhouse gas emissions. Reducing their environmental impact is crucial for meeting global emission targets and can be done by looking at less harmful refrigerants and improving system efficiency. This study presents the latest developments in the vapor compression cycle and natural refrigerants, with a focus on water as a refrigerant. Natural refrigerants, especially water, could be the ultimate solution to the environmental problems associated with cooling systems.
CLEAN TECHNOLOGIES
(2023)
Article
Energy & Fuels
Jiaul Haque Saboj, Preetom Nag, Goutam Saha, Suvash C. Saha
Summary: This study investigates the heat transfer and entropy generation of a buoyancy-driven natural convection flow in an octagonal cavity with a cold cylinder. The results show that incorporating the cold cylinder improves heat transfer efficiency, and using the heat flux condition yields higher average Nusselt number and lower Bejan number. It is also found that heat transfer and entropy generation are more significant in Al2O3-H2O nanofluid compared to air and water, and heat transfer increases with the scale parameter.
Article
Energy & Fuels
Zobia Begum, Muhammad Saleem, Shams Ul Islam, Suvash C. Saha
Summary: This study investigated the influence of constant volumetric heat generation and viscous dissipation on the unsteady natural convection flow of an incompressible Newtonian fluid in a rectangular cavity through numerical simulations. The results showed that physical parameters have a significant impact on the flow patterns and temperature distribution. The variations of maximum stream function, as well as average and local Nusselt number, were also discussed.
Article
Energy & Fuels
Puchanee Larpruenrudee, Doan Khai Do, Nick S. Bennett, Suvash C. Saha, Mohammad Ghalambaz, Mohammad S. Islam
Summary: Spray cooling technology offers efficient heat removal with low fluid volumes, and its application can be expanded with the help of research. This study investigates the impact of temperature and humidity conditions on spray cooling performance in six Australian cities, revealing that weather conditions, especially in summer, significantly influence the effectiveness of spray cooling.
Article
Energy & Fuels
Md. Mahafujur Rahaman, Sidhartha Bhowmick, Rabindra Nath Mondal, Suvash C. Saha
Summary: Numerical findings of natural convection flows in a trapezoidal cavity with heated bottom wall, cooled top wall, and adiabatic inclined sidewalls are reported in this study. The study focuses on the transition from symmetric steady to chaotic flow within the cavity, investigating the effect of Rayleigh numbers on the transition process. Using the finite volume method, the unsteady natural convection flows are simulated for air, considering different dimensionless parameters. Bifurcation analysis, spectral analysis, and heat transfer computations are performed to understand the flow phenomena during the transition.
Article
Environmental Sciences
Abhishek Gupta, Akshoy Ranjan Paul, Suvash C. Saha
Summary: This article examines the economic prospects and market potential of carbon capture technologies in India, specifically in the power, petrochemicals, and fertilizer sectors. It emphasizes the importance of carbon sequestration and the need for new technological developments. Additionally, the study highlights the essential policy and regulatory frameworks for CCUS implementation.
Article
Thermodynamics
Huimin Cui, Mengjiao Han, Feng Xu, Qingkuan Liu, Suvash C. Saha
Summary: This study analyzes the dimensional development of natural convection and heat transfer in triangular cavities. It provides important guidance for the thermal engineering of buildings and heat dissipation in electronic devices.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
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)
