Article
Thermodynamics
Yosuke Yasuda, Fumika Nabeshima, Keisuke Horiuchi, Hiroki Nagai
Summary: Neutron radiography was used to visualize the behaviors of the working fluid in a flat-plate pulsating heat pipe made of aluminum alloy in bottom and top heating orientations. The results showed that the distribution of the working fluid does affect the startup characteristics of the PHP, with different heating orientations leading to different fluid behaviors.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Mechanics
Maksym Slobodeniuk, Remi Bertossi, Vincent Ayel, Rajalakshmi Ravichandran, Karthik Thyagarajan, Cyril Romestant, Yves Bertin
Summary: An investigation was conducted on the thermal performances of a flat plate pulsating heat pipe (FPPHP) and the influence of liquid-vapor interface oscillation on the flow pattern inside the FPPHP under microgravity conditions. The experimental results show that the temperature rise in the evaporator zone during microgravity periods is mainly caused by the dry-out of the evaporator, and flow re-activation is rarely observed. The analysis of flow parameters and liquid plugs motion validates the classical criteria used for flow pattern definition in this case.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2022)
Article
Thermodynamics
Larissa Krambeck, Kelvin G. Domiciano, Luis A. Betancur-Arboleda, Marcia B. H. Mantelli
Summary: This article introduces an improved flat plate pulsating heat pipe with channel modification in the evaporator region, resulting in ultra sharp lateral grooves, to enhance heat transfer performance. Experimental results show that the ultra sharp grooves, acting as artificial nucleation sites and capillary medium, can delay dry-out and make the device suitable for application in microgravity environments.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Xi Chen, Xiangdong Liu, Dehao Xu, Yongping Chen
Summary: This article experimentally investigates the thermo-hydrodynamic characteristics of a novel flat-plate pulsating heat pipe (FP-PHP) in a simulated hypergravity environment. The study reveals that hypergravity has a negative impact on the start-up process and thermo-hydrodynamic performance of the FP-PHP, but it can still be successfully started up at a suitable temperature level. Furthermore, the FP-PHP exhibits good thermal performance uniformity, high thermal conductivity, and adaptability in hypergravity conditions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Latif Aref, Rasoul Fallahzadeh, Seyed Reza Shabanian, Mojtaba Hosseinzadeh
Summary: The study aims to increase the thermal efficiency of a flat plate closed-loop pulsating heat pipe solar collector by introducing a novel closed-loop pulsating heat pipe (CLPHP) with a dual-diameter structure. Experimental results show that the thermal performance of the dual-diameter configuration is considerably better than the single-diameter in different inclination angles, achieving a thermal efficiency of 72.4% under sunny weather conditions.
Article
Thermodynamics
Vincent Ayel, Maksym Slobodeniuk, Remi Bertossi, Abhishek Karmakar, Flavien Martineau, Cyril Romestant, Yves Bertin, Sameer Khandekar
Summary: An experimental study was conducted on a copper closed-loop flat plate pulsating heat pipe under different orientations and working fluid conditions, showing that aqueous mixtures significantly improved thermal performance, while pure fluids and water with surfactants exhibited significant instabilities.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Hyung Yun Noh, Aejung Yoon, Sung Jin Kim
Summary: The impact of transverse wall conduction on the thermal performance of a flat-plate pulsating heat pipe (FP-PHP) was numerically investigated. The study confirmed significant influence of thermal interaction on the thermal performance, which should be considered when the Fourier number (Fo) is higher than 5 x 10(5).
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Koji Fumoto, Keiko Ishii
Summary: A study found that highly efficient heat transport can be achieved when the filling ratio of a pulsating heat pipe (PHP) is extremely low. The experiment used a flat aluminum tube with 28 straight channels and obtained a minimum thermal resistance of 0.021 K/W and a temperature difference of less than 1.0 K between the evaporating and condensing sections.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Chenxi Li, Ji Li
Summary: With the development of the data center industry, it has become crucial to remove waste heat from small-area heat sources for the safe and efficient operation of data processing chips. This study proposed a novel three-dimensional flat plate aluminum pulsating heat pipe (3D-FPPHP) with four different channel structures for radial heat dissipation of high-power server chips. The results showed that the FPPHP filled with acetone could start up easily and had good robustness during variable power operation.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Energy & Fuels
Ziyun Wang, Jia Zhu, Moxin Wang, Qinglong Gao
Summary: Using renewable energy, especially solar energy, is crucial for achieving a low-carbon society. This study proposes a new building heating ceiling system that combines flat-plate heat pipes (FHP) and phase change materials (PCM) to enhance the efficiency of PCM-based systems. Experimental results show that increasing heating power and bending angle can improve the heat transfer efficiency of the FHP and the phase change heat storage system.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Lipei Yan, Ping Zhang, Hui Xu, Wei Ma, Jiang Sheng
Summary: This paper experimentally investigates the visualization of thermo-hydrodynamic behavior in flat-plate pulsating heat pipe (FP-PHP) with HFE-347. The study reveals that the flow patterns in FP-PHP with medium (40%-60%) and high (70%) filling rate are dominated by mixed flow at high heating power (100 W to 140 W), while at moderate heating power (60 W to 80 W), wall temperature fluctuates greatly due to the uncertainty of flow direction. The temperature distribution of the FP-PHP is highly affected by the heat transfer intensity of the working fluid under different flow states.
JOURNAL OF THERMAL SCIENCE
(2021)
Article
Thermodynamics
Sai Kiran Hota, Kuan-Lin Lee, Brett Leitherer, George Elias, Greg Hoeschele, Srujan Rokkam
Summary: Two-phase-based heat spreaders are highly sought after for electronics cooling due to their superior thermal performance. Pulsating Heat Pipes (PHPs) offer thickness, shape, and cost advantages over Embedded Heat Pipe (EHP) spreaders. The thermal performance of PHP with different fluids was experimentally determined and compared to EHP. A mathematical model was developed and validated. Propylene-filled PHP performs similarly or better than EHP at low sink temperatures but dries out faster at moderate temperatures. PHP with R245fa and acetone improves with increasing power but has lower thermal conductivity compared to EHP. PHP is lighter than EHP based on weight comparison.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Luca Pagliarini, Luca Cattani, Vincent Ayel, Maksym Slobodeniuk, Cyril Romestant, Fabio Bozzoli
Summary: The present investigation aims to design a robust technique for the study of the inner fluid dynamics in a metallic pulsating heat pipe, without adopting typical experimental solutions. The heat fluxes exchanged between the working fluid and the device walls are first assessed, and then processed to quantify the fluid oscillatory behavior. The proposed method provides useful insights into the heat transfer modes and can be effectively adopted in other flat-plate layouts.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
Chenxi Li, Ji Li
Summary: In order to meet the increasing power density and heat dissipation requirements of data center servers, an aluminum-based flat plate pulsating heat pipe module with local heating in the center and cooling on the rest of the sides was proposed. Experimental studies on heat dissipation performance were conducted using acetone and R113 as working fluids. The proposed flat plate pulsating heat pipe module showed superior thermal performance compared to other commercial vapor chambers, with a heat dissipation capability of 250 W and a minimum thermal resistance of 0.225 degrees C/W at the optimal filling rate (75-80%).
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Robert Dreiling, Sascha Zimmermann, Thinh Nguyen-Xuan, Peter Schreivogel, Francesca di Mare
Summary: This study presents a conduction-based approach for pseudo-steady heat transfer in pulsating heat pipes (PHPs) and calculates the internal thermal resistance using multi-fluid correlations. The simulation results of the external temperature field show good agreement with experimental data, and it is found that considering thermal spreading effects is crucial for interpreting the overall thermal resistance and designing optimal FP-PHPs.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Vadim Nikolayev, Sauro Filippeschi
Summary: The start-up process of a large diameter Pulsating Heat Pipe (PHP) specially designed for future experiments on the International Space Station (ISS) has been numerically simulated and compared with the results obtained during a parabolic flight campaign. The numerical simulation results agree with the experimental results, providing useful information for the correct design of the engineering model.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Ali Ahmed Alqahtani, Stuart Edwardson, Marco Marengo, Volfango Bertola
Summary: The heat transfer performance of a flat-plate, flexible polypropylene pulsating heat pipe (PHP) was experimentally evaluated. The bending angle and the reciprocal positions of the heat sink and source were found to have minimal effect on the thermal performance, but may affect the start-up of the PHP.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Stefano Piacquadio, Maximilian Schirp-Schoenen, Mauro Mameli, Sauro Filippeschi, Kai-Uwe Schroeder
Summary: The influence of different aluminum lattice structures on the thermal behavior of phase change materials is investigated in this study. It is found that the topology of the lattice structure affects the transient thermal behavior, in addition to its direct impact on the cell porosity. The composite based on the f(2)ccz topology shows the best performance. Although the samples have relatively low porosity, the wide pore diameters lead to a significant impact of melt convection on the thermal behavior. The effect of heating orientation on heat transfer is also explored.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Konstantinos Vontas, Nicolas Miche, Marco Marengo, Anastasios Georgoulas
Summary: This study investigates the effect of solid surface thermophysical properties on flow boiling heat transfer characteristics within micro-channels using numerical simulations. The results show that materials with higher thermal conductivity exhibit higher heat transfer coefficients, indicating the significant influence of solid surface properties on heat transfer in flow boiling.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Ning Qian, Marco Marengo, Jiajia Chen, Yucan Fu, Jingzhou Zhang, Jiuhua Xu
Summary: This study investigates the thermal performance of a single-loop oscillating heat pipe (OHP) under rotation conditions. The results show that the heat transfer capacity of OHPs filled with acetone and methanol improves with increasing centrifugal acceleration, while the thermal performance of an OHP filled with water peaks at a rotation centrifugal acceleration of 30 m/s(2). The centrifugal acceleration promotes movements of the working fluid and improves the heat transport capacity.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Ning Qian, Fan Jiang, Marco Marengo, Jiajia Chen, Yucan Fu, Jingzhou Zhang, Jiuhua Xu
Summary: This study investigates the start-up behavior of oscillating heat pipes (OHP) under axial-rotation and highlights the importance of start-up speed on grinding efficiency and quality. It is found that OHP filled with acetone has the shortest start-up time, and the cold air pressure and centrifugal acceleration significantly affect the start-up time.
APPLIED THERMAL ENGINEERING
(2023)
Review
Thermodynamics
Marco Bernagozzi, Anastasios Georgoulas, Nicolas Miche, Marco Marengo
Summary: Electric vehicles are seen as a potential solution for reducing greenhouse gas emissions and addressing global warming. Battery thermal management is critical for the performance and sustainability of electric vehicles. Current technologies for battery thermal management in commercial vehicles include air and liquid cooling. This review focuses on the potential use of passive thermal devices called heat pipes for battery thermal management, analyzing different types of heat pipes and methods for removing excess heat. The review aims to collect research results, identify strengths and weaknesses, and propose future research directions for heat pipe battery thermal management systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Mechanics
Sarvin Naji, Arvin Rahimi, Vahid Bazargan, Marco Marengo
Summary: In this study, a microfluidic chip using a non-embedded co-flow-focusing geometry was numerically simulated to improve droplet generation throughput. An artificial neural network model was trained to optimize the device geometry and flow rate, resulting in remarkable reduction of computation time. Additionally, a periodically switched laser simulation successfully predicted droplet generation frequency.
Article
Thermodynamics
Ning Qian, Fan Jiang, Marco Marengo, Yucan Fu, Jiuhua Xu
Summary: Grinding of difficult-to-machining materials generates excessive heat. Radial-rotating oscillating heat pipe (RR-OHP) can enhance heat transfer and control the temperature during grinding. Experimental results demonstrate that RR-OHP improves heat transfer efficiency in grinding process significantly.
APPLIED THERMAL ENGINEERING
(2023)
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
Construction & Building Technology
Roberto Rugani, Marco Bernagozzi, Marco Picco, Giacomo Salvadori, Marco Marengo, Hui Zhang, Fabio Fantozzi
Summary: Personal Comfort Systems (PCSs) create localized comfort environments that satisfy individual needs and reduce energy consumption of main HVAC systems. A study focused on a new type of PCS - a warming desk - that uses conduction and radiation for efficient and effective heat transfer. Results showed that the warming desk provided good overall comfort and thermal sensation, with the ability to adjust the surface temperature for individual preferences. The PCS corrected the ambient temperature by about 7K, creating improved thermal comfort compared to centralized HVAC.
BUILDING AND ENVIRONMENT
(2023)
Article
Energy & Fuels
Konstantinos Vontas, Marco Pavarani, Nicolas Miche, Marco Marengo, Anastasios Georgoulas
Summary: This study investigates the applicability of the Eulerian-Eulerian two-fluid model and RPI model in non-conventional channels through numerical simulations. The model is validated and optimized using experimental data from conventional channels, and the importance of including a bubble coalescence and break-up sub-model is demonstrated.
Article
Materials Science, Multidisciplinary
Ghazal Biglari, Maedeh Saberi, Shervin Issakhani, Omid Jadidi, Jafar Farhadi, Vahid Bazargan, Marco Marengo
Summary: This study investigates the controllable patterning of bio-compatible polymers in the presence of a cross-linker in evaporating bi-dispersed colloidal drops. By changing the concentrations of sodium alginate and calcium chloride, the elemental distribution and deposition uniformity of the final patterns can be significantly altered.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Proceedings Paper
Thermodynamics
Sauro Filippeschi, Roberta Perna, Mauro Mameli, Maksym Slobodeniuk, Luca Pagliarini, Cyril Romestant, Luca Cattani, Vincent Ayel, Fabio Bozzoli
2022 28TH INTERNATIONAL WORKSHOP ON THERMAL INVESTIGATIONS OF ICS AND SYSTEMS (THERMINIC 2022)
(2022)
Article
Thermodynamics
Ning Qian, Yucan Fu, Jiajia Chen, Marco Marengo, Jingzhou Zhang, Jiuhua Xu
Summary: Oscillating heat pipes (OHP) have high heat transport capacity and simple structure, but research on their heat transfer performance under system rotation is insufficient. This study experimentally investigates the thermal performance of a centrifugal-accelerated single closed loop OHP and uses grey system theory to model the thermal performance and predict the heat transfer coefficient. The results show improved heat transfer characteristics with increased centrifugal acceleration, and the prediction model provides reliable guidance for engineering applications of OHPs.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
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)