Article
Thermodynamics
Rouhollah Moosavi, Mehdi Banihashemi, Cheng-Xian Lin, Po-Ya Abel Chuang
Summary: The study investigates the three-dimensional heat transfer and pressure drop within a microchannel with transverse vortex generator and porous medium. The results show that the convective heat transfer coefficient increases with height and the number of vortex generators, but the pressure drop also increases. By normalizing the changes in heat transfer coefficient and pressure drop using a thermal performance ratio, the microchannel with a combination of vortex generator and porous medium exhibits the highest thermal performance ratio.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Houpei Li, Pega Hrnjak
Summary: This paper presents the measurements of flow boiling heat transfer coefficient and pressure gradient for R32 and R1234yf mixtures in a microchannel tube. The results show that mass flux has a significant effect on both heat transfer coefficient and pressure gradient, while heat flux only affects the heat transfer coefficient. Furthermore, the temperature glide curve has an impact on the heat transfer coefficient.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yanhong Sun, Ao Huang, Jinli Lu, Yuyan Jiang
Summary: This study experimentally investigated the heat transfer characteristics and dynamic flow boiling instabilities of ethanol in a rectangular microchannel. The results showed that the inhibition of bubble nucleation caused by large bubbles in the confined space led to a deterioration in heat transfer performance. Higher mass flux resulted in more effective bubble nucleation and better heat transfer. The triggering of flow boiling instability in the microchannel was strongly dependent on quasi-periodical flow phenomenon and multiphase alternation. The thermophysical properties of the working liquid significantly affected the fluctuation amplitude.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Chinmaya Kumar Patra, Anandaroop Bhattacharya, Prasanta Kumar Das
Summary: A one-dimensional flow-boiling model is developed to study the pressure drop and heat transfer mechanism in a microchannel of rectangular cross-section under slug-flow regime. The model considers different stages of bubble growth and the periodic passage of different zones to evaluate the pressure drop and heat transfer coefficient. The results show that the channel dimension, flow velocity, heat flux, and working fluid properties have significant effects on the pressure drop and heat transfer coefficient.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Imene Rahmoune, Saadi Bougoul
Summary: This study presents an analysis of heat transmission and magnetic nanofluid flow in a minichannel with corrugated upper wall and exposed to a magnetic field. The results show that magnetic nanofluid subjected to a magnetic field acts as an active vortex generator, improving fluid mixing and heat transmission. Increase in magnetic field strength and volume fraction has a positive effect on flow structure and heat transfer.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Engineering, Chemical
Ying Zhang, Minqiang Pan
Summary: The study focused on the heat transfer performance and structural influence of N-structure microchannel heat exchangers. The arrangement of wave channel sections in the N-structure significantly affects the performance of the microchannel heat exchanger. The symmetrical N-structure was found to have the best heat transfer effect.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Thermodynamics
D. D. Ma, Y. X. Tang, G. D. Xia
Summary: The sinusoidal wavy microchannels with secondary channels (SWSC) show better heat removal performance in flow boiling studies compared to conventional microchannels, thanks to increased bubble nucleation induced by enlarged surface area and continuous development of thin liquid film due to the introduction of secondary channels. However, the SWSC microchannels suffer from a higher pressure drop penalty.
APPLIED THERMAL ENGINEERING
(2021)
Review
Thermodynamics
Shashank Singh, Anup Malik, Harlal Singh Mali
Summary: This article critically examines the research on modifications in geometry of channels for thermo-hydraulic performance enhancement and aims to determine the best channel configuration with optimal parameters. It explores various designs and their influencing parameters, as well as presents conclusions and potential recommendations for future research.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Alisan Gonul, Abdulkerim Okbaz, Nurullah Kayaci, Ahmet Selim Dalkilic
Summary: In this study, the effects of delta winglet-type vortex generators on the heat transfer enhancement and pressure loss in microchannels were investigated numerically. It was found that vortex generators significantly improve heat transfer performance with a corresponding increase in pressure loss. Multi-objective optimization and sensitivity analysis were conducted to determine the most optimum design parameters and propose practical correlations for Nusselt number and friction factor.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Tingbo Hou, Danmin Xu
Summary: This study investigates the influence of the ellipticity of an elliptical concave cavity on the pressure drop and heat transfer performance of a microchannel heat exchanger (MHE). The results show that an MHE with ellipticity 1.0 exhibits the best pressure drop and heat transfer performance.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Siwei Tang, Gongnan Xie, Guohua Zhang, Bengt Sunden
Summary: This article investigates the effects of traditional delta winglet pair vortex generators (DWPVG) with slits on pressure drops and heat transfer performances in a rectangular channel. Through three-dimensional calculations and analysis of thermo-fluid processes, it is found that induced vortices are located closer to the bottom surface, improving the local Nusselt number behind DWPVG when the fluid flows through slits. Furthermore, DWPVG with slits decreases the pressure drop and improves the local thermal efficiency in the channel with a high blocking ratio. The overall thermal performance of the slit DWPVG channel with a high blocking ratio increases with the increase in Reynolds number, and the highest heat transfer enhancement is achieved by opening slits on five DWPVGs in the rectangular channel.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Chaowei Chen, Xinyu Wang, Baoqiang Yuan, Wenjing Du, Gongming Xin
Summary: This study investigates the flow and heat transfer characteristics of microchannels with different manifold structures through numerical simulation and finds that manifold optimization can improve the fluid distribution, reduce pressure loss, thermal resistance, and temperature difference in the microchannels. The parabolic-type manifold provides the best comprehensive performance, and achieving uniform fluid distribution in the microchannels can be realized by controlling the converging rate of the manifold.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Juncheng Qiu, Jianhong Zhou, Qi Zhao, Hanshi Qin, Xuemei Chen
Summary: Researchers introduced biomimetic microchannels inspired by cobweb structures for enhancing flow boiling heat transfer performance. The cobweb-shaped microchannels demonstrated improved heat transfer coefficient and lower wall temperature due to flow disturbance and increased heat transfer area. Among them, the cobweb-shaped microchannels with horizontal inlet and outlet showed the best heat transfer performance and most stable flow boiling behavior particularly at high heat flux.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Hui Geng, Xiaoyu Cui, Hailong She, Zhihao Chang
Summary: A new multilayer distributed Joule-Thomson cooler with pillars is investigated in this study, and its mathematical model is validated against experimental data, showing relative errors within 5% for temperature and mass-flow rate. Numerical results demonstrate that the cooler achieves significant cooling capacity with varying inlet pressures, and the simulation model provides a useful tool for analyzing the cooling performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Chemical
Fuat Kaya
Summary: This paper investigates the effects of boron nitride (BN) and other nanoparticles (Al2O3, CuO and TiO2) on pressure drop and heat transfer in a microchannel using computational fluid dynamics (CFD). The results show that BN has better heat transfer performance compared to other nanoparticles due to its high thermal conductivity and low density. However, it slightly increases pressure losses. Additionally, BN is chemically stable at high temperatures and can be used in cooling systems without agglomeration issues.
Article
Energy & Fuels
Huang Qin, Hai Zhang, Ping He, Xiaolin Wang, Jiang Wu, Xiumin Jiang
Summary: The study utilized density functional theory to investigate the effect of multiple-membered carbocycles on the adsorption of elemental mercury on carbon surfaces. Results showed that the distribution of C-C bond lengths and adsorption energy were influenced by the presence of MMC, leading to different trends in adsorption categories.
Article
Thermodynamics
Enyuan Gao, Zhongbin Zhang, Qingqing Deng, Huaqian Jing, Xiaolin Wang, Xiaosong Zhang
Summary: The study found that using low-GWP alternative refrigerants R407A and R407F is more advantageous in terms of energy efficiency and environmental impact compared to R404A. However, the safety of R407F at high ambient temperatures still needs to be addressed.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Article
Engineering, Environmental
Fengyuan Zhang, Xiaolin Wang, Bo Wang, Xia Lou, Wojciech Lipinski
Summary: The promotion of gas hydrate formation kinetics through mass transfer enhancement has been an important research topic. This study investigates the kinetics of carbon dioxide (CO2) and methane (CH4) hydrate formation in microparticles made of silica. The results reveal that dry water particles with 8-wt% silica have the highest gas uptake. The simulation results show that the average effective diffusion coefficient of gas is higher in smaller particles. The heat transfer in gas hydrate formation is found to have negligible impact.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Hai Zhang, Huang Qin, Xiaolin Wang, Jiaxun Liu, Jianguo Liu, Xiumin Jiang
Summary: This study conducted a comprehensive thermodynamics analysis of N2O formation and kinetics using density functional theory (DFT) and transition state theory (TST). Results showed that different oxygen forms and temperatures can affect the formation of N2O.
COMBUSTION AND FLAME
(2022)
Article
Thermodynamics
Morteza Hangi, Alireza Rahbari, Xiaolin Wang, Wojciech Lipinski
Summary: The study demonstrates that inserting free rotating axial-turbine-types swirl generators (ATTSGs) in a circular tube can significantly enhance convective heat transfer, with a maximum enhancement of around 75%. The analysis of the net torque applied on the ATTSGs and their angular velocity reveals an efficient way to improve heat transfer efficiency.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Energy & Fuels
Yuxuan Zhang, Mehdi Vahabzadeh Bozorg, Juan F. Torres, Yongling Zhao, Xiaolin Wang
Summary: This study investigates the effects of capsule geometry on the dynamic melting performance of encapsulated phase change material (PCM) driven by natural convection. The authors develop a validated model that considers heat transfer through the surrounding air, capsule shell, and PCM, enabling the prediction of a three-stage dynamic melting process. The results show that capsule geometry plays a significant role in the phase change time, with pyramidal and tetrahedral capsules melting faster due to their larger surface area and higher heat transfer rate.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Zhongbin Zhang, Meng Chen, Wenting Zhang, Xiaolin Wang
Summary: This study investigates the effect of a built-in flute-type distributor on the gas-liquid two-phase refrigerant flow in micro-channel flat tubes. The optimal design parameters were determined through comparisons of cooling capacity, power input and energy efficiency ratio. Results showed that the evaporator performs best with a placement angle of 180 degrees +/- 6 degrees.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Sophie Burgess, Xiaolin Wang, Alireza Rahbari, Morteza Hangi
Summary: The increasing demand for home grocery delivery presents challenges to the cold chain logistics. A potential solution is the use of portable phase change material (PCM) container system. This study determines the optimal layout and properties of PCMs through experimental and numerical analysis. Analysis shows that the placement of PCMs along the top, bottom, and long side walls of the container is the most effective configuration, and the environmental temperature has a significant impact on the container performance.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Meng Chen, Juan Zhao, Zhongbin Zhang, Chenghua Gu, Xiaolin Wang
Summary: This study investigates the temperature gradient and thermal performance of a small-size vaccine cold storage warehouse in various cities in Jiangsu Province, China. The study explores the effects of cold storage geometry, cooler layout, air curtain, and vaccine load on thermal performance. The results show that arranging two air coolers with appropriate cooling capacity along the length direction produces more uniform air distribution. Additionally, reducing the length to width ratio of the cold storage decreases temperature inhomogeneity. An air curtain outlet wider than the door is found to better maintain temperature stability. Evaluation metrics are proposed for vaccine cold storage with loads.
JOURNAL OF ENERGY STORAGE
(2022)
Review
Construction & Building Technology
Xiaotong Shao, Zhongbin Zhang, Ping Song, Yanzhen Feng, Xiaolin Wang
Summary: This article reviews the recent progress in the development of data center evaluation metrics over the past 20 years. It summarizes energy efficiency metrics based on energy conservation, eco-design, and data center security, and discusses their advantages, disadvantages, and correlations. The influencing factors of data center energy efficiency are analyzed. The results show that current evaluation metrics are valuable for assessing energy savings in data centers, but more comprehensive and multi-scale metrics are needed to achieve carbon neutrality.
ENERGY AND BUILDINGS
(2022)
Article
Chemistry, Physical
Fengyuan Zhang, Suresh K. Bhatia, Bo Wang, Benjapon Chalermsinsuwan, Xiaolin Wang
Summary: The kinetics of CO2 and N-2 gas mixtures hydrates formation in silica gel columns of varied pore sizes were studied experimentally and numerically. The addition of DTAC solution improved the hydrate formation and CO2 separation performance. The results showed that larger pore sizes have shorter induction time, and the addition of DTAC reduced the induction time significantly. The CO2 gas uptake increased initially but had little change later. The presence of DTAC reduced the final CO2 concentration in the gas phase and increased the CO2 separation factor. Both CO2 and N-2 molecules were involved in the hydrate formation.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Thermodynamics
Chaiyanan Kamsuwan, Xiaolin Wang, Pornpote Piumsomboon, Yotsakorn Pratumwal, Somboon Otarawanna, Benjapon Chalermsinsuwan
Summary: Energy demand is increasing due to population growth and basic needs, and energy integration is a promising solution for alleviating energy shortages. Nanoparticles called nanofluids, which have high thermal conductivity, are used to enhance the thermal properties of coolants in heat exchangers. This study combines artificial neural network (ANN) and conventional process simulation to examine the performance of nanofluid enhancement on heat exchangers.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Yanzhen Feng, Wenting Zhang, Zhongbin Zhang, Xiaotong Shao, Peng Liu, Xiaolin Wang
Summary: This study improves the uniformity of refrigerant flow in mini-channel evaporators by inserting a flute-type coaxial multi-opening distributor. The experimental results show that the most uniform refrigerant two-phase flow is achieved when using a non-uniform distributor and a certain opening direction, leading to significant improvements in the performance of air conditioner units.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Yuxuan Zhang, Xiaoqiang Zhai, Fengyuan Zhang, Zhongbin Zhang, Kamel Hooman, Hai Zhang, Xiaolin Wang
Summary: This article proposes a novel carbon capture capsule inspired by red blood cells (RBC) to enhance CO2 hydrate formation kinetics. Compared to spherical capsules, the RBC-shaped capsule shows a 143% higher gas uptake efficiency. The study also investigates the effects of initial pressure and capsule size on CO2 hydrate formation kinetics.
Article
Engineering, Environmental
Yuxuan Zhang, Zhongbin Zhang, Xiaoqiang Zhai, Yixiang Gan, Benjapon Chalermsinsuwan, Xiaolin Wang
Summary: Gas hydrates play a crucial role in the capture, storage, transport, and utilization of various gases. The dissociation kinetics of gas hydrates greatly affects gas transport and recovery efficiency. Encapsulation has been shown to be an effective technique for improving gas hydrate formation kinetics. In this study, the dissociation kinetics of encapsulated CO2-TBAB semi-clathrate hydrates in different shapes are experimentally investigated, and a two-stage numerical model is developed to simulate the dissociation process. The results show that the surface-to-volume ratio of the capsule and the dissociation driving force are the main factors influencing the dissociation kinetics, and the ring-shaped capsule exhibits the most efficient dissociation process. This work enhances the understanding of gas hydrate dissociation behavior in individual capsules and provides guidance for efficient hydrate-based gas transport and recovery.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Yunxia Ma, Fei Liu, Honggang Pan, Hongjian Zhang, Shuxia Yan, Ailing Zhang
Summary: This paper proposes a dynamically tunable and switchable perfect infrared absorber that exhibits excellent electrical regulation performance and high absorptance. The absorption mechanism is explained using a multiple interference model, and it is proven to be polarization insensitive.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
F. J. dos Santos, G. S. M. Martins, M. Strobel, L. Beckedorff, K. V. de Paiva, J. L. G. Oliveira
Summary: This study investigates the effects of inlet conditions and plate's features on the thermal-flow performance of a gasket plate heat exchanger (GPHE) and assesses the impact of a modified tightening distance on its performance. No systematic study on the combined effects of inlet conditions and assembly accuracy on GPHE performance has been conducted before.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Alok K. Ray, Dibakar Rakshit, K. Ravi Kumar, Hal Gurgenci
Summary: The low thermal conductivity of phase change materials limits the heat transfer rate and application of latent heat storage systems. This numerical study examines the impact of two passive heat transfer enhancement techniques on the thermal performance of a latent heat storage system. The results show that the orientation and position of the heat transfer fluid tube have significant effects on the charging duration, while the discharging duration remains unchanged. The combined effect of orientation and eccentricity reduces the charging duration, but increases the discharging duration compared to the concentric domain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yalu Han, Yanlong Wang, Chenyang Liu, Xinmin Hu, Yin An, Zhengcai Li, Jiaxun Jiang, Lizhi Du
Summary: This paper investigates the calculation method of thermal conductivity in NAPLs-contaminated soils. By establishing NAPLs-contaminated soil models and using the Lattice Boltzmann Method (LBM) for calculation, an optimized three-dimensional model with high computational accuracy and efficiency is obtained. The study also finds that saturation and Nz parameters have a significant impact on calculation time, while the thermal conductivity of the two-dimensional model is more sensitive to anisotropy. The influence of porosity and NAPLs content on thermal conductivity should be considered during in-situ thermal desorption.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Mostafa Taha, Song Zhao, Aymeric Lamorlette, Jean-Louis Consalvi, Pierre Boivin
Summary: For the first time, large-eddy simulations (LES) of the near-field region of large-scale fire plumes were performed using a pressure-based Lattice Boltzmann method (LBM) with low-Mach number approximation. The simulations showed quantitative agreement with experimental data and were consistent with previously-published numerical studies. The study demonstrated the computational efficiency of the proposed LBM solver in tackling fire-induced flows, suggesting LBMs as a good alternative candidate for modeling fire-related problems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weixin Zhang, Yehang Xie, Yuqiang Ding, Zhao Liu, Zhenping Feng
Summary: This study investigated the impact of upstream slot leakage on the endwall film cooling characteristics of turbine blades. Pressure Sensitive Paint (PSP) technology was used to measure the film cooling characteristics, and numerical analysis was conducted to evaluate the aerodynamic performance. It was found that increasing the mass flow ratio of the upstream slot enhanced film cooling, decreased aerodynamic losses, and reduced the strength of passage vortex. However, reducing the distance between the slot and the blade leading edge only enhanced film cooling without affecting the leakage coverage area.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rui Zhang, Zhen-lei Li, Yan-sheng Zhang, Dong Chen, Guo Yuan
Summary: This study discusses the heat transfer behavior of different jet forms on steel tubes. The results show that the annular jet performs better in terms of cooling intensity and uniformity. The cooling performances of the two jet forms are similar when the steel tube size is small. Therefore, the planar jet can be considered for smaller diameters due to its simplicity, low cost, and convenience in application.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
A. R. Khoei, A. M. Orvati Movaffagh, A. Rezaei Sameti
Summary: This paper presents a comprehensive study on the thermo-mechanical characteristics of oxide-coated aluminum nano-powder. It is found that the thermal conductivity of oxide-coated aluminum nano-powder is significantly lower than that of the bulk aluminum, and it is affected by the density and temperature.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yanjin Wang, Jintao Xiong, Lingyu Chen, Zhihai Lv, Qian Wang
Summary: A solar radiation transfer model for spray cooling double skin facade (SC-DSF) is proposed in this study. The model is validated by experimental results and various influence factors are analyzed. The effectiveness of adjusting droplet coverage rate and size is also evaluated.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Bostjan Zajec, Blaz Mikuz, Anil Kumar Basavaraj, Marko Matkovic, Matej Tekavcic, Martin Draksler, Leon Cizelj, Bostjan Koncar
Summary: We have developed an advanced experimental setup to investigate flow and heat transfer in an annular channel. The setup allows heat transfer measurements and flow visualization using a temperature-controlled inner tube. Measurements can be conducted in both single-phase and two-phase flow regimes. The setup ensures a uniform velocity field in the annular channel using specially designed inlet and outlet headers. The inner copper tube is heated by water and contains turbulators for enhanced heat transfer and thermocouples for temperature measurement. A three-dimensional conjugate heat transfer CFD model has been developed and validated to accurately estimate heat losses in the setup. This study demonstrates the importance of numerical simulations in improving the interpretation of complex experimental results.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weijie Chen, Ke Wang, Yongqing Wang, Shantung Tu, Zunchao Liu, Huijuan Su
Summary: In this study, a novel gradient porosity transpiration cooling plate structure (GP-TCPS) is proposed to alleviate heat transfer deterioration caused by non-uniform temperature distribution in transpiration cooling plate structure (TCPS). Computational fluid dynamics (CFD) and response surface method (RSM) were used for qualitative and quantitative analysis of the flow and heat transfer of GP-TCPS. The optimized structure of GP-TCPS significantly improves temperature uniformity, injection pressure, and average cooling efficiency compared to traditional TCPS.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
R. Essam, A. Elsaid, W. K. Zahra
Summary: This study presents a novel bioheat model for simulating heat transfer in skin tissue. The model offers an improved representation of thermal dynamics in the skin and has been validated using numerical solutions and experimental measurements. The study highlights the importance of incorporating vascular inlet parameters and thermal relaxation effects in the thermal profile, and suggests potential applications in thermal therapy and wound healing.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Dongbo Shi, Tao Xu, Zifeng Chen, Di Zhang, Yonghui Xie
Summary: The cooling structure design of turbine blades is crucial for the safety and reliability of the gas turbine set. This research investigates different arrangement schemes, including dimple/protrusion arrangements, to enhance the cooling performance. The results show that the arrangement scheme with both passes arranged by dimples has the best comprehensive thermal performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Emrehan Guersoy, Hayati Kadir Pazarlioglu, Mehmet Guerdal, Engin Gedik, Kamil Arslan
Summary: The thermo-hydraulic performance of Al2O3/H2O nanofluid with different nanoparticle shapes flowing in a sudden expansion tube with variable sudden expansion inclination angles and elliptical dimpled fins with different diameters were numerically investigated. The results showed that the nanoparticle shapes, sudden expansion inclination angles, and elliptical dimpled fin have significant impact on the thermo-hydraulic performance. This study reveals the novelty and importance of these factors in the research.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rukun Hu, Xinyu Huang, Xinyu Gao, Liu Lu, Xiaohu Yang, Bengt Sund
Summary: This study examines the impact of applying bottom cross-cut on PCM's spatial distribution in a horizontal LHTES unit using numerical simulation. The findings show that bottom cross-cut can improve the heat storage rate and natural convection heat transfer gain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)