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Computational analysis of heat transfer and fluid flow characteristics in a diamond microchannel heat sink with orthogonal ribs Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-11 Liang Du, Wenbo Hu, Ningkang Deng, Zhaoyang Zhang, Hongxing Wang
As electronic devices advance toward higher power densities and increased miniaturization, the resulting rise in heat flux presents significant challenges to their performance, reliability, operational lifespan, and energy efficiency. Effective thermal management technologies ensure that electronic equipment operates under optimal conditions, extends its service life, improves system integration and
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Heat recovery efficiency optimization of High-Temperature Aquifer Thermal Energy Storage system in naturally fractured reservoirs: A combined multi-physics modeling and regression prediction method Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-10 Yibin Jin, Yan Ding, Chunxiao Li, Zuoji Qin, Quanrong Wang
High-Temperature Aquifer Thermal Energy Storage (HT-ATES) system holds significant potential for addressing the challenges of energy supply and demand management. However, the complexity of natural fracture networks within reservoirs poses a challenge for accurate simulations. In this work, a coupled thermal-hydraulic-mechanical (THM) model was developed to investigate the performance of HT-ATES system
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Thermal comfort analysis of intelligent cabin seat ventilation and heating considering heat transfer between human and seat Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-09 Yingchao Zhang, Ruizhuo Zhou, Guohua Wang, Ziqiao Li, He Chang
Based on the development of intelligent control system for automotive cabin thermal comfort, this paper uses CFD simulation analysis to explore the effects of seat heating and seat ventilation functions on occupant cabin thermal environment and occupant thermal comfort under extreme cold in winter and extreme hot in summer, respectively, and establishes a occupant cabin thermal comfort simulation method
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Thermo-diffusion analysis for viscoelastic fluid due to stretching surface with viscous dissipation and radiative effects Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-08 Hassan Hanafy, Iskander Tlili
The heat and mass transfer phenomenon in flow of viscoelastic fluid involves many dynamical applications in the polymer solutions, glass blowing, extrusion processes, filaments, cooling systems etc. The aim of current research is to explore the thermo-diffusion effects in flow of viscoelastic fluid subject stretched cylinder. The problem is further updated by entertaining the viscous dissipation and
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Analysis of dissipative slip flow in couple stress nanofluids over a permeable stretching surface for heat and mass transfer optimization Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-08 Haifaa Alrihieli, Musaad S. Aldhabani
A numerical investigation is conducted on the dissipative flow of couple stress nanofluids over a linearly stretched permeable sheet, incorporating slip velocity. The primary objective is to explore how coupling stress, permeability, and slip velocity influence the fluid dynamics and heat transfer characteristics of the nanofluid flow. The analysis employs first-order slip conditions combined with
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Study of thermal behavior on multi-tank cascade system for ship-borne hydrogen storage tank using a new design configuration Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-07 Ji-Qiang Li, Tong Wu, Zhen-Yu Gong, Yong Fan, Hao-Ran Ma, Jeong-Tae Kwon, Caizhi Zhang, Ji-Chao Li
Hydrogen tanks (HT) with different connection modes are an integral part of the shipborne hydrogen fuel cell system. To ensure the safe and reliable operation of the shipborne multi-tank cascade system, this study innovatively develops 3D models of four different connection modes for the shipborne multi-tank cascade system, namely Type-22, Type-211, Type-121, and Type-112. Through computational fluid
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Study on the vacuum freeze-drying of banana and impact on powder properties Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-05 Onur Taskin
This research evaluated vacuum freeze-drying (VFD) for banana slices in terms of drying behavior, energy, cost, color, rehydration, shrinkage, pH and °Brix, microstructure, and thermal images. Additionally, powder properties were investigated. The correlations representing the two-term exponential model constants and their dependence on the VFD parameters indicated that the most appropriate model was
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Comprehensive study on cooling effectiveness and thermoelectric conversion of a novel helium/hydrogen-based closed Brayton cooling system for a hydrogen aero-engine Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-05 Qiurui Xin, Xiaohui Bai, Helong Jin, Chengao Duan, Yuxi Li, Cunliang Liu
The Brayton cycle and thermoelectric generators offer significant potential for cooling hydrogen aero-engines. However, existing research on Brayton cooling schemes integrated with thermoelectric generators (TEGs) remains limited, typically relying on assumed state parameters that are challenging to obtain. This study proposes a one-dimensional method that considers the coupling relationships between
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Boosting the thermal efficiency of a flat-tube parabolic trough solar collector with the introduction of innovative slashed triangular prism turbulators Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Sultan Alshehery, Qasem Al Mdallal, Ahmed A. Altohamy, Lotfi Ben Said, Mohamed Bouzidi, Turki Alkathiri, Lioua Kolsi
This study focuses on enhancing the thermal performance of parabolic trough solar collectors (PTSC) by modifying the geometry of the absorber tube to a flat design. For the first time, an innovative turbulator known as the triangular prisms turbulator (TPT) has been utilized, with its geometry specifically designed to fit precisely within the flat tube. Tests were conducted on various geometric parameters
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Experimental research on the performance response of gas stoves under different gas pressures Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Yangjun Zhang, Jing Hu, Hao Chen, Honggen Yu, Jun Zhai
This paper investigates the performance of gas stoves under varying gas pressures. Two commercial and two domestic gas stoves were tested at pressures ranging from 2.8 kPa to 100 kPa. A new parameter—the temperature rise rate— is introduced to evaluate whether the gas stove's cooking performance can meet users' daily cooking needs. The results show that as the gas pressure increases, the heat input
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An enhanced thermal conduction model for viscous thermal interactions in circular micro-resonators supported by elastic foundations Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Mohammed Alsubhi
This study investigated the effects of thermoelastic coupling on the viscoelastic behavior of Kelvin-Voigt elastic circular plate resonators. The viscoelastic microsheet resonators were modeled as homogeneous, isotropic structures based on the Winkler foundation. Utilizing the modified Moore-Gibson-Thompson thermoelasticity (MGTE) model, which incorporated both limited thermomechanical diffusion and
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Heat and mass transfer performance of power-law nanofluid flow with thermal radiation and joule heating aspects: Surface heat flux analysis Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Mhamed Benaissa, Zia Ullah, A. Dahshan, Md Mahbub Alam, Khadijah M. Abualnaja, Hanaa Abu-Zinadah, Abdullah A. Faqihi, Nidhal Ben Khedher
In the present advanced technological century, investigation of Joule-heat effects and radiating energy on power-law nanomaterial movement along a vertical extended sheet have presented the substantial potential in numerous engineering and technological applications. In this manuscript, the detailed numerical study of thermal-mass transmission with joule heating and thermal radiation influence on power-law
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Investigation of turbulent thermal-hydraulic behaviors of a heat exchanger tube with U-cut twisted-tape Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 K. Wongcharee, V. Chuwattanakul, S. Chamoli, N. Maruyama, M. Hirota, S. Eiamsa-ard
This study examines the influences of U-cut twisted tapes (U-TTs) on thermal-hydraulic behaviors in a circular tube with uniform heat flux. The geometric parameters studied include six U-cut ratios (s/t = 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0) and two twist ratios (y/w = 3.5 and 4.0). Experimental results revealed that their U-cut ratios highly influenced heat transfer enhancement. U-TTs with U-cut ratios
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Investigating the influence of heterocyclic Schiff bases as a biofuel additive on combustion, performance and emissions Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Beşir Dağ, Selman Aydın, Ramazan Şener
The growing need for cleaner and more efficient energy sources has driven extensive research into biofuels and their additives to improve combustion performance and reduce emissions. This study investigates the potential impact of heterocyclic Schiff bases as biofuel additives, exploring their effects on combustion efficiency, engine performance, and emissions characteristics in compression ignition
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Energy-saving control strategy for the joint operation of multiple ground source heat pumps system based on TRNSYS: A research study Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Zeyu Dai, Xuedan Zhang, Jun Liu, Boyang Liu, Fujiao Tang
Ground source heat pump (GSHP) system are widely recognized as an energy-efficient renewable energy utilization system, particularly for public buildings. In the GSHP systems where multiple units operate jointly, the control strategy for these units plays a key role in enhancing energy efficiency. This study proposes a novel control strategy for the joint operation of multiple heat pump units under
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The real driving emissions characteristics of light-duty diesel vehicle in four typical cities with varying altitudes in China Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Haojie Gao, Rui Wang, Zhisong Wen, Xin Xiong, Zhuan Zheng, Shengqiang Lin, Hongchun Ding, Wenbin Tan
Real driving emissions (RDE) tests were conducted on a China VI B compliant light-duty diesel vehicle in four cities with different altitudes. The emission factors of particle number (PN), nitrogen oxides (NOx), and carbon monoxide (CO) were calculated using the carbon dioxide (CO2) moving average window (MAW) method and compared across different altitudes and driving stages. The tests covered urban
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Performance optimization of Maisotsenko cycle heat exchangers: A three-dimensional parametric analysis Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Seyed Esmail Razavi, Tohid Adibi, Mohanad Naji Halool Abohned, Shams Forruque Ahmed, Hammad Alotaibi
The Maisotsenko cycle (M-cycle) heat exchangers have emerged as a promising technology due to their potential for high heat transfer rates and sustainable cooling. However, previous studies have lacked comprehensive three-dimensional modeling to evaluate the effects of geometry, relative humidity, and airflow on heat exchanger performance. To address this gap, this study presents an optimized performance
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Impact of tube shapes on the energy storage and thermal-hydraulic performances of finned latent heat energy storage systems Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Zihao Cheng, Juan Du, Shuao Jia, Chengxiang Xiao, Feng Jiao, Yuxiang Hong
The imbalance between the demand and supply of intermittent renewable energy can be mitigated by latent heat thermal energy storage (LHTES) devices. This study suggests a novel polygonal tube LHTES system that combines the fins and tube wall into a single structure in order to increase the heat storage power, improve the system's heat transfer efficiency, and effectively enhance thermal conductivity
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Earth–lunar thermal effect on the temperature stability of TianQin telescope and the suppression methods Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-04 Wenbo Chang, Yuxiang Wang, Wenhai Tan, Guanhua Wu, Houyuan Chen, Wei Li, Zizheng Li, Fan Zhu, Zhu Li, Xuefeng Zhang, Shanqing Yang
TianQin is a geocentric space-based gravitational wave detection mission, it will confront a more complex and variable orbital thermal environment compared to heliocentric orbit missions like LISA. As one of the core payloads in TianQin, the telescope requires stringent temperature stability. Furthermore, the telescope operates as an open system directly exposed to the external environment. Besides
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Study on combustion characteristics and thermodynamic model of SBS modified asphalt Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-03 Jinwei Xu, Jianguang Xie, Yangwei Tan
To evaluate effects of Styrene-Butadiene-Styrene (SBS) on combustion characteristics of asphalt, kinetic models of asphalt combustion were developed. Firstly, thermogravimetric (TG) analysis was used to test combustion properties of SBS and asphalt. Then, combustion kinetics of asphalt was modeled based on thermodynamic theory. Finally, combustion characteristics of SBS modified asphalt (SBSMA) were
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Experimental investigation and scenario-based optimization of energy flexibility in embedded radiant cooling systems Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-03 Yun Xie, Yanxue Li, Hongshe Cui
This study experimentally demonstrates the precooling flexibility of radiant cooling panels embedded into the envelope. The results show that a 3-h precooling period provides approximately 2.5 h of recovery time, allowing the indoor temperature to rise steadily to the upper limit with relatively low energy consumption. This confirms the effectiveness of the proposed cooling system in load shifting
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Experimental study on the solar heating and night sky radiative cooling properties of biochar Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-03 Haiwei Xie, Jianyun Luo, Yan Zhang, Jiajuan Yan, Yuhao Qing
Daytime solar heating and nighttime radiative cooling are of great significance to global energy conservation and carbon neutrality because of their low cost, zero energy consumption and environmentally friendly characteristics. In this study, a new radiation material, walnut shell biochar (WBS), was proposed and its performance in daytime solar heating and nighttime radiative cooling was studied.
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Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plants Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-03 Zhiwen Hou, Liping Pang, Binghao Zhang, Jun Wang, Liqiang Duan, Huimin Wei, Xiaoze Du
In this paper, a method for electric-resistance heating is proposed to reduce the thermal stress generated at a thick-walled pressure component during cold start-up in a coal-fired utility boiler. The aims of this approach are to shorten the start-up time and enhance the flexibility of the utility boiler. While focusing on a steam-water separator in a supercritical utility boiler, the finite element
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Thermodynamic and economic analysis, optimization of SOFC/GT/SCO2/ORC hybrid power systems for methanol reforming-powered ships with carbon capture Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-03 Shouguang Yao, Xuan Yan, Minjie Xia, Chuang Wang, Shaofan Wang
To realize the efficient use of energy and reduction of emissions of the power system of ocean-going vessels, a 25,000-ton chemical ship is used as the subject of this study. A hybrid power system containing carbon capture based on methanol external reforming of solid oxide fuel cell coupled with gas turbine is proposed, further to achieve efficient energy use and reduce carbon emissions, the power
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Investigation on the influencing mechanism and quantitative evaluation of stirred heat effect in high-speed mechanical seals Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-03 Xuezhong Ma, Xiaoxin Xiao
Stirred heat is much severe in mechanical seals under high-speed conditions, which significantly affects seal's heat transfer and dissipation characteristics. A three-dimensional thermohydrodynamic numerical model consisting of the fluid film, sealed chamber and sealing rings is developed to investigate the influencing mechanism of stirred heat by the comparative analyses of fluid flow, heat generation
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Dynamic characteristics of a two-phase mechanically pumped cooling loop for avionics Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-03 Shaohuan Qi, Zhaohao Xu, Jiale Wang, Yu Xu
Given the varying flight conditions and mission requirements that affect aircraft cold sources and heat loads, it is crucial to investigate the dynamic behavior of a two-phase mechanically pumped cooling loop (MPCL) for avionics. Here, an experimental MPCL system charged with R134a was established, and its performance was evaluated under cold source temperatures of 16–46 °C and heat fluxes of 50–150 kW/m2
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Significance of solar radiation and viscous dissipation on oscillatory and steady convective heat transfer around buoyancy-driven sphere using FDM scheme Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-02-01 Alanoud Alsuhaymi, Musaad S. Aldhabani
The innovation of this paper is to explore the transient behavior of heat transport and transient behavior of shear stress rate of unsteady fluid flow around the sphere surface in the presence of solar radiation, thermal buoyancy and viscous dissipation. Thermal radiation is used in the development of nuclear reactors, fire propagation, jet motion, chemical manufacturing, missile engine power, rockets
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Computational study of conjugate heat transfer and entropy generation of hybrid nano-particles in an enclosure with solid block Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-31 Shahid Ullah, Ghulam Saddiq, Afraz Hussain Majeed, Hammad Alotaibi, Ahmed S. Hendy, Mohamed R. Ali
A conducting hollow cylinder body is positioned in the center of a horizontal layer of fluid that is heated mixed half vertically and cooled from below and above, representing the physical model under consideration. The purpose of this paper is to investigate conjugate heat transfer of mixed convection and entropy generation of nanofluid in the presence of an external magnetic field via computational
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Modeling of thermoelectric generator combined with solar system including paraffin with ternary nanoparticles Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-31 A. Ahadi, M. Sheikholeslami, S.M. Mousavi, H.R. Ashorynejad, P. Raissi
This article introduces an innovative integration of a thermoelectric generator (TEG) module with a U-tube evacuated solar system, using paraffin as the phase change material (PCM). To enhance the PCM's melting rate and improve the system’s overall thermal efficiency, three advanced strategies were employed: (1) The addition of ternary nanoparticles—comprising MgO, ZnO, and MWCNT—into the paraffin
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Numerical study of bioheat transfer in a vascular bed with counter-flow mechanisms Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-30 K.R. Sreegowrav, R. Indira, Sushma M. Puranik, S. Jagadeesha, S.J. Vishwanatha, K. Ganesh Kumar
Simulating and analyzing thermal behavior in the human body is crucial for various biomedical applications. The skin, composed of multiple layers, is connected to the vascular bed, which comprises venules and capillaries. Blood, the body's primary thermoregulator, flows towards the tissue through capillaries and away through venules. These blood vessels, separated by a thin layer of tissue, prevent
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Thermal performance enhancement in evacuated tube solar collector with working fluid MWCNT/Al2O3/MgO tri-hybrid nanofluid Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-30 Sathish Thanikodi, Jayant Giri, Rathinasamy Saravanan, Shafiq Ahmad, Ahmad O. Hourani
This study is motivated-by the urgent global need to enhance the efficiency of solar thermal energy systems, particularly Evacuated Tube Solar Collector (ETSC), to meet the growing demand for renewable energy solutions in combating climate change and reducing reliance on fossil fuels. By exploring advanced tri-hybrid nanofluids, the study aims to significantly improve the thermal performance and energy
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Numerical analysis of the impact of non-contact fins on the natural convection during melting process Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-29 Zhicheng Zhang, Zuoqin Qian, Lumei Zhao, Qiang Wang, Baolin Wang
Adding fins is an effective method to accelerate melting proccess. However, fins may not necessarily reduce the melting time due to the negative effects for natural convection. This paper propossed non-contact fins to investigate the impact of fins on convection during the melting process. The results indicate that the melting time can be reduced by up to 10.1 % and increased by 11 % for non-contact
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Enhancing solar thermoelectric generator performance using metal oxide layer absorbers under concentrated solar radiation Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-29 Abdelkader Rjafallah, Daniel Tudor Cotfas, Petru Adrian Cotfas
Solar Thermoelectric Generators (STEGs) hold promise for sustainable energy, with ongoing efforts to enhance efficiency through advanced thermal absorbers. This study evaluates the performance of STEGs using graphite sheet (GS) and metal oxides layer (MOL) absorbers under solar concentrations of 20, 40, 60, and 80 suns. Performance metrics, including short-circuit current (Isc), open-circuit voltage
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Conversion of water hyacinth biomass to biofuel with TiO2 nanoparticle blending: Exergy and statistical analysis Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-29 Akshay Jain, Bhaskor Jyoti Bora, Rakesh Kumar, Prabhu Paramasivam, Natrayan Lakshmaiya, Praveen Kumar Kanti, Leliso Hobicho Dabelo
The lower calorific value of biodiesel results in lower efficiency compared to diesel mode. To address this issue, researchers have explored the use of nanoparticles to enhance the properties of biodiesel. In this study, nano-fuel with 150 ppm of TiO2 nanoparticles in Water Hyacinth Biodiesel (WHB) was examined. The fuel injection pressure (FIP) of the engine is advanced for the nanofuel, and engine
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Experimental study on the porous structure and heat dissipation characteristics of multiwalled carbon nanotube films with added cellulose nanocrystals Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-27 Seunghyeon Lee, Seungyeop Baek, Cheol Park, Dongmin Shin, Junhyo Kim, Yonmo Sung
Optimizing the nanostructure of composite materials is crucial for enhancing thermal management performance in various applications. One longstanding challenge has been achieving controlled porosity and dispersion in multi-walled carbon nanotubes (MWCNTs). This study introduces a novel approach by introducing cellulose nanocrystals (CNC) as a key factor for structural modification. Unlike traditional
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Effect of thermophoresis on particle deposition on an inclined plate in variable viscosity fluid flow within a porous medium Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-27 J.S. Huang, H.H. Hsu
Aerosol particles experience thermal thrust due to temperature gradient, moving from high-temperature regions to low-temperature ones, known as thermophoresis. When a temperature difference exists between the fluid and the object's surface, the thermophoretic effect generates a force that directs particles toward a colder wall or pushes them outward from a heated wall. The study of fluid flow through
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Performance enhancement of organic single-flash cycles by eliminating the throttle valves: A comparative exergy-economic assessment Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-27 Aboulbaba Eladeb, Ali B.M. Ali, Pooya Ghodratallah, Kuwar Mausam, Rahul Thakur, Praney Madan, Lotfi Ben Said, Lioua Kolsi
The excessive energy and exergy wastage resulting from the throttling processes in flash-based cycles is a significant concern. Researchers have proposed several solutions to mitigate these negative impacts. Nevertheless, there has been limited focus on comparing these solutions. The present study is carried out to compare the thermo-economic performances of five organic cycles driven by a geothermal
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Performance evaluation of a lightweight acrylic flat plate collector with natural flow integration in a hybrid photovoltaic-thermal (PVT) system Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-27 Gayatri Patil, K.R. Patil, Rohan Kulkarni, Suhas Kakade, Shankar Amalraj
Photovoltaic Thermal (PVT) systems have garnered attention for their dual functionality of generating electricity and capturing heat. However, conventional PVT systems often employ bulky metallic pipes with forced fluid circulation, leading to higher initial costs, increased maintenance, and elevated energy consumption. To overcome these challenges, this research introduces a novel lightweight acrylic
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Study on thermal and physiological responses during summer while moving between academic buildings under different walking conditions Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-27 Jiahao Yang, Haiyan Li, Zhaosong Fang, Yongcai Li, Fangqi Lu, Tongye Guo, Xiang Zhang, Chang Lin, Jun Lu
During the hot summer season, students walking through corridors connecting academic buildings may experience brief periods of dynamic sunlight exposure, which could have some impact on their thermal sensation and physiological responses. However, there is limited research focusing on short outdoor walking between different buildings for individuals. Therefore, we conducted a field survey on a university
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Experimental study on fire temperature field of extra-long highway tunnel under the effect of auxiliary channel design parameters Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-26 Yinjun Tan, Jie Li, Huayun Li, Zhisheng Li
Accounting for the auxiliary channel's design parameters, 96 model tests on tunnel fires were conducted. The primary investigation centred on the influence of inclined shaft angle, the diameter and height of the vertical shaft on the temperature fields within extra-long highway tunnels during fires. It was observed that the HRR of a square-shaped fire source correlates linearly with the burner's surface
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Numerical study of the heat transfer characteristics of Helium-Air flow in PCHE with zigzag channel Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-25 Haidong Liu, Qiao Zeng, Deqi Chen, Yi Xiao, Yangyang Wang, Mingxia Liu, Xiaoli Qu
The PCHE is a critical component in the intermediate heat exchanger of mobile micro-reactors. This study conducts a numerical investigation of the flow and heat transfer characteristics of helium-air within the zigzag channels of the PCHE under 69 different thermal-hydraulic operating conditions. The results reveal that the model validation shows good agreement, with maximum errors in the Nu and f
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Impact of fuel additives on the performance, combustion and emission characteristics of diesel engine charged by waste plastic bio-diesel Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-24 Jayashri N. Nair, T. Nagadurga, V. Dhana Raju, Harish Venu, Sameer Algburi, Sarfaraz Kamangar, Amir Ibrahim Ali Arabi, Abdul Razak, Narasimha Marakala
Plastic waste in the environment has increased rapidly in recent years, amounting to nearly 4 million metric tons per annum globally. This waste comprises materials such as low-density polyethylene, high-density polyethylene, polyethylene terephthalate, polystyrene, and more. The current research focuses on the use of plastic waste as a biofuel for diesel engines. The properties of waste plastic oil
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The effect of adding green synthesized and commercial silver nanoparticles to biodiesel on diesel engine performance and emissions Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-23 Usame Demir, Merve Keskin, Salih Özer, Gokhan Coskun
This study evaluates the impact of silver nanoparticles synthesized via a green method using Humulus lupulus L. and commercial silver nanoparticles (CAS: 7440-22-4) on biodiesel performance and emissions in diesel engines. Biodiesel from waste cooking oil was tested under partial load (1–4 kW) with the following blends: 100 % diesel (D), 50 % diesel-50 % biodiesel (BD50), biodiesel with green-synthesized
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Influence of color reflectance on the thermal performance of building facades: A factor model-based detective analysis Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-23 Chenxi Hu, Ge Zhang, Xi Meng, Fan He
With global climate change and accelerated urbanization, the thermal performance of building facade color reflectance has a significant impact on the thermal environment and energy consumption of cities. In this study, the spectral reflectance and color properties of 36 color samples were measured, and their thermal performance was tested under outdoor conditions in winter and summer as well as calculated
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Unsteady flow and heat transfer optimization of viscous fluid with bioconvection over a rotating stretchable disk and gyrotactic motile microorganisms Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-22 Mazhar Hussain, Samya Shahid, Noreen Sher Akbar, Mohammed Kbiri Alaoui
The ultimate aim of the present paper is to investigate thermal, mass and microorganism transfer rates in convective flow. Nanofluid's heat transfer along with unsteady laminar flow on stretched rotating disk with motile microorganism bioconvection is numerically analyzed. The novelty of study is to construct a framework that combines microorganisms along with energy equation to analyze how can they
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Nonlocal fracture analysis of fiber reinforced composites under heat flux loading Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-21 Kunyang Cao, Ruchao Gao, Wenzhi Yang, Zhijun Liu, Zengtao Chen
This work aims to explore the fracture characteristics of fiber reinforced composites under heat flux loadings in the framework of Eringen's nonlocal elasticity. Epoxy-based composites reinforced by T300 graphite fiber, AS graphite fiber and S-Glass fiber are examined to study the temperature and nonlocal thermal stress conditions around the crack tips. Both the horizontal and vertical fibers are considered
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A conceptual flow field with metallic foam for enhanced performance and thermal management in a PEM fuel cell Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-21 Pouya Barnoon
The flow field configuration significantly influences the output power of PEMFCs. Common designs often result in lower current densities, making it challenging to achieve higher current density and better uniformity of reactant gases. This study introduces a conceptual flow field design on the cathode side to enhance power density and reactant gas uniformity. Two scenarios are analyzed: with and without
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Conjugate heat dissipation characteristics of concurrent flow of pure water/water-based nano-emulsion through a mini- and micro-channel stacked double-layer heat sink Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-20 C.J. Ho, Jr-Wei Liao, Bo-Lin Chen, Saman Rashidi, Wei-Mon Yan
The main purpose of current study is to reduce the temperature gradient and pressure drop in the heat sinks by using a new double-layer mini/micro-channel stacked heat sink. In this numerical study, the conjugate heat dissipation characteristics of concurrent flow of pure water/water-based nano-emulsion through a mini- and micro-channel stacked double-layer heat sink is investigated. The potentials
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Performance optimization of solar still employing red-bricks as sensible heat storage material and interfacial evaporation area Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-20 S. Mankai, S. Chemkhi, J. Madiouli, F. Ouled Saad, I. Shigidi, J. Sghaier
Freshwater productivity by solar desalination offers promising solutions for using clean energy, reducing environmental pollution and being cost-effective. However, solar stills require energy storage and evaporation rate improvement to overcome global water demand. In this article, a case study in Kairouan city (Tunisia) is presented: the impact of incorporating hollow-red-bricks into the basin area
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Multi-objective topology optimization of cold plates for enhanced battery thermal management in electric vehicles Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-20 Yijun Wang, Minghao Yu, Haiyang Fan, Jae Dong Chung
Efficient thermal management is critical for maintaining the performance, longevity, and safety of lithium-ion batteries, particularly in electric vehicles (EVs). This paper presents a multi-objective topology optimization (TO) approach for designing cold plates in battery thermal management systems (BTMS), with the aim of minimizing both average temperature and power dissipation. The TO model was
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Design of an additively manufactured thermal solution for an axial flux switched reluctance motor Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-20 Martin Sarap, Shalini Singh, Ants Kallaste, Ahmed Qureshi, Hans Tiismus, Toomas Vaimann, Payam Shams Ghahfarokhi
This study presents the design and evaluation of an additively manufactured thermal solution for an axial flux switched reluctance motor, aimed at enhancing its applicability in light unmanned aircraft propulsion. The primary objective is to optimize the motor's power-to-weight ratio by improving its thermal management through innovative heatsink designs. The methodology involves a comprehensive design
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Orientation effect of arc array horizontal tubes inside a phase change storage unit on melting and solidification characteristics Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-20 Mohamed A. Alnakeeb, Mohaned M. El-Bashouty, Mostafa M. Zaytoun, Medhat M. Sorour
This numerical study examines the phase change material melting and solidification characteristics that are filled inside the shell of different multiple-tube arc array storage units. For all studied cases, the heat transfer surface area and the PCM quantities are kept constant. The melting and solidification are numerically simulated via the enthalpy-porosity method. A two-dimensional numerical model
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Solidification behavior of copper/aluminum composites in twin-roll casting under electric fields Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-20 Mingyang Zhang, Jiaruo Li, Fuqiang Chu, Yanhui Feng
Electric field is widely used in the preparation of metallic materials to enhance their properties. In this study, we simulated the solidification behavior of twin-roll casting (TRC) copper/aluminum composites (Cu/Al) using finite volume method. A comparative examination of the temperature distribution, fluid dynamics, and instantaneous cooling rate, is conducted considering scenarios both with and
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Research on control strategies for low-pressure components in integrated thermal management systems based on optimal coefficient of performance Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-20 Rongjiang Tang, Lei Guan, Cheng Xu, Yanhong Wei, Xianming Meng, Bin Jia, Shuhan Wen
In pure electric vehicles (PEVs), the thermal management system's energy consumption under cooling conditions constitutes between 9.8 % and 26.9 % of the total vehicle energy expenditure. To enhance the driving range of electric vehicles, it is crucial to reduce the thermal management system's energy consumption and improve its efficiency. This research investigates the performance variations of thermal
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Experimental study on the heat transfer performance of vapor chamber with uniform/gradient wicks Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-20 Liaofei Yin, Jiachen Li, Zhou Wang, Hongling Lu
The balance of the combined effect of wick permeability and capillary pressure is very important to improve the heat transfer capability of the vapor chamber (VC). In this paper, a series of VCs were designed and fabricated, in which the wick was a gradient structure with composite particle shape and composite particle size, and their heat transfer effects were studied experimentally and compared with
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Hygrothermal performance of well-insulated wood-frame walls in Baltic climatic conditions Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-20 Anatolijs Borodinecs, Vladislavs Jacnevs, Lakatos Ákos, Staņislavs Gendelis
This study investigates the hygrothermal performance of wood-frame walls in the Baltic region under varying moisture loads, comparing bio-based and conventional insulation materials. The research combines experimental climate chamber testing with DELPHIN simulations to assess moisture risk mitigation, energy efficiency and mould growth resistance. The results highlight that bio-based insulations, such
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Numerical assessment of solar panel with utilizing ferrofluid flow within wavy duct equipped with V-shaped fins Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-19 Mohammed A. Tashkandi, Ali Basem, Hussein A.Z. AL-bonsrulah, Lioua Kolsi, Mahmood Shaker Albdeiri, Lotfi Ben Said, Amira M. Hussin
This research evaluates the performance of a solar panel under the influence of dust deposition and explores methods to enhance its efficiency. The panel's cooling system incorporates a wavy duct design fitted with V-shaped fins, and the working fluid—water—is augmented with nanoparticles to improve heat transfer. Lorentz force is applied in the y-axis direction to regulate the flow of the ferrofluid
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Accelerating and decelerating flow of radiatively Casson fluid between two permeable disks under convective boundary conditions Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-19 A. Naeem, Z. Abbas, M.Y. Rafiq
The fully developed flow between two flat radial disks has much significance in industrial and technological fields. Therefore, this work deals with the hydromagnetic flow of incompressible Casson fluid between two permeable parallel disks under convective surface constraints. The impacts of thermal radiation and heat generation/absorption are also incorporated into the energy equation. Jacobi elliptic
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Numerical assessment of heat transfer and entropy generation of a mixed convection ferrofluid flow under the effect of a non-uniform magnetic field Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-17 Kamel Zitouni, Messaouda Boumaaza, Lakhdar Aidaoui, Yahia Lasbet, Houssam Eddin Abdellatif, Shan Ali Khan, Yazid Chetbani, Ahmed Belaadi, Ibrahim M.H. Alshaikh, Djamel Ghernaout
This study investigated the flow characteristics, entropy generation, and thermal transfer of convection in a vertical and horizontal three-dimensional square duct filled with ferrofluid. The influence of periodic transverse and partial magnetic fields (MFs) along the walls of a duct having a constant flux density on the flow pattern is explored. The analysis is carried out by examining various geometric
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A comprehensive numerical study exploring the significance of thermally reactive bioconvection in Falkner-Skan flow of Williamson nanomaterials influenced by activation energy and buoyancy forces Case Stud. Therm. Eng. (IF 6.4) Pub Date : 2025-01-17 M. Israr Ur Rehman, Haibo Chen, Aamir Hamid, Wu Qian, Refka Ghodhbani, Mohamed Hussien
Heat and mass transport performance is greatly improved in a variety of industrial, engineering, and technological applications by the advanced thermal properties of nanomaterials, which are enhanced by chemical reactions, nonlinear thermal radiation, nonuniform heat sources/sinks, Arrhenius kinetic energy, and induced electromagnetic forces. The analysis is further improved by adding thermophoretic