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Design of adsorption chillers under rolling conditions in naval applications: Experimental and numerical approaches Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-21 Valeria Palomba, Antonino Bonanno, Vincenza Brancato, Andrea Frazzica, Ralph Herrmann
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Study on the criterion of the onset of heat transfer deterioration for supercritical CO2 in upward flow Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-21 Qianqian Ren, Zhengwei Yang, Yu Liu, Xi Chen, Xiaojing Zhu, Qinggang Qiu
Supercritical fluid heat transfer deterioration (HTD) tends to lower the heat transfer capacity and should be avoided in designing and optimizing heat transfer equipment. It is essential to establish accurate criteria for predicting the onset of HTD. In this study, an experimental investigation of supercritical CO in a heated tube with diameters of 8 and 14.5 mm was conducted. By integrating the data
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Heat transfer enhancement in a loop thermosyphon with microencapsulated phase change material suspension Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-20 Zhenyu Tan, Xunfeng Li, Jingzhi Zhou, Bin Liu, Xiulan Huai, Keyong Cheng
The microencapsulated phase change material suspension (MPCMS) is a novel functional thermal fluid. The application of MPCMS to loop thermosyphon is an innovative attempt, which can effectively improve the heat transfer efficiency of loop thermosyphon. In this paper, a three-phase loop thermosyphon using water-based MPCMS as the medium is developed. A comprehensive experimental investigation was conducted
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Numerical study on thermal-hydraulic characteristics of streamwise-interrupted flying-wing finned tubes Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-19 Long Miao, Rui Wan, Yi-Chun Wang, Shi-Qun Liu, Lei Liu, Long-Hai Li
To improve the thermal-hydraulic performance, this study conducted numerical studies on streamwise-interrupted flying-wing finned tubes utilising both single- and double-channel interruption modes. The interruptions varied in width from 0.5 to 10 mm and were strategically positioned in nine distinct locations along the flow direction. The RNG - turbulence model was applied for viscous flow simulation
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Development of partitioned rectangular-shaped heat sink for photovoltaic thermal systems and performance evaluation using TiO2/Water-based nanofluids Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-19 Kadir Gelis, Omar A. Al-Khatib, Kadir Ozbek
The current study presents a partitioned rectangular-shaped heat sink for improving the PVT system performance. The experiment was examined under various experimental parameters. Five cooler block types with different dimensions were arranged to share the same total contact area with the panel back surface. These cooler blocks were placed in different arrangements, namely (PVT-I, PVT-II, PVT-III, PVT-IV
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Energy modeling, calibration, and validation of a small-scale greenhouse using TRNSYS Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-19 Arnaud Beaulac, Timothé Lalonde, Didier Haillot, Danielle Monfet
Greenhouse energy modeling is a prevalent tool for optimizing greenhouse energy consumption. However, for a model to serve its intended use, it is imperative to have a high level of confidence in the precision of its predictions. In this paper, a validated greenhouse energy model for a typical small-scale greenhouse in a cold climate is developed. The model is created using TRNSYS, a building performance
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A novel algorithm for asphaltene precipitation modeling in shale reservoirs with the consideration of capillary pressure during the CCUS processes Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Zhuo Chen, Ruixue Li, Shuaijie Yang, Yuanwei Qin, Liang Gong, Daoliang Zhang
Tight and shale reservoirs have markedly expanded their role in global oil and gas production. However, the overall recovery from these reservoirs is suboptimal, leaving much of the shale oil unrecovered. CO flooding is a promising enhanced oil recovery (EOR) technique that can improve oil extraction and simultaneously facilitate carbon capture, utilization, and storage (CCUS). However, this method
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Energy, exergy, environmental and exergoeconomic (4E) analysis of an ultra-low temperature cascade refrigeration system with environmental-friendly refrigerants Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Shenrui Ji, Zhan Liu, Hao Pan, Xiaozhao Li
To ensure the efficacy of some special vaccines, the ultra-low temperature storage below −80 °C is strictly required and the classical cascade refrigeration system has a good application prospect in the production, storage, transportation and distribution of COVID-19 vaccines. Previous investigations are mainly focused on the thermodynamic performance of cascade refrigeration cycles (CRSs) to generate
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Experimental investigation of the intermittent spray heat transfer characteristics of nanofluids in single- and two-phase states Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Jiyu Feng, Wei Chen, Changyi Liu, Peng Tan, Fuxiang Du, Wenjie Yang, Yichuan Wang
Traditional air-cooled cooling systems used in engineering vehicles consume significant energy and do not align well with future development trends. To address this problem, a single- and two-phase intermittent spray cooling technique for nanofluids was proposed in this study. The effects of the duty cycle and spray frequency on the heat transfer performance and surface temperature uniformity of intermittent
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Dynamic power generation performance of enhanced geothermal system during life cycle in gonghe basin, china Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Tailu Li, Zeyu Wang, Xiang Gao, Yuwen Qiao, Yao Zhang, Fengyun Jin
Enhanced geothermal systems (EGS) can efficiently generate electricity from hot dry rock (HDR), the temperature of which will decrease during its life cycle. In this paper, the organic Rankine Cycle (ORC) experimental device and dynamic model are established to investigate the dynamic power generation performance with heat source temperature decrease, and the relative installed capacity ratio is defined
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Numerical investigation into the thermal interference of slinky ground heat exchangers Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Man Luo, Guohui Gan
The thermal performance of a slinky ground heat exchanger has been investigated using a validated transient 3D model for different trench separations, installation depths, soil properties, and daily operation hours. The effect of trench separation on thermal interference was analysed. The centre-to-centre distances between parallel trenches range from 1.5 m to 11 m. The initial soil temperature was
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Parametric study of a scraped surface heat exchanger for latent energy storage for domestic hot water generation Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 A. Egea, A. García, J. Pérez-García, R. Herrero-Martín
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Experimental study of pool boiling performance of Fe3O4 ferromagnetic nanofluid on a copper surface Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Jianqiang Du, Wei Yang, Hengxuan Zhu, Jin Wang, Zhen Cao, Bengt Sundén
Nanofluids significantly enhance the critical heat flux of boiling heat transfer. This paper experimentally investigates the pool boiling performance and the influence mechanism of FeO nanofluids. Compared with deionized water, the 0.001 vol% nanofluid increases a maximum enhancement in critical heat flux by 47.90%. During nanofluid boiling, FeO nanoparticles are deposited on the surfaces. The nanoparticle
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Investigating the coupling effect of ventilation and GHEs on temperature distribution and heat transfer characteristics Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Mingrui Luo, Zuobing Yuan, Lintao Fan, Liangliang Tao, Yanhua Zeng, Qixiang Yan
Tunnel lining geothermal heat exchangers (GHEs) offer numerous advantages, including small area, cost-effectiveness and high heat exchange efficiency. It is a good equipment to utilize geothermal energy in tunnels. However, few research has been conducted on the combined impact of tunnel lining GHEs and ventilation on the temperature field of the surrounding rock. In this study, laboratory test model
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Influence of tree planting pattern coupled with wall thermal effect on pollution dispersion within urban street canyon Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Rong Ji, Peng-Yi Cui, Yuan-Dong Huang, Yang Luo, Cheng-Jun Jiang, Chao-Yi Zhai
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Optimization of a unileg thermoelectric generator by the combination of Taguchi method and evolutionary neural network for green power generation Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Wei-Hsin Chen, Tzu-Hsuan Huang, Ding Luo, Liwen Jin, Chika Maduabuchi, Ravita Lamba, Anh Tuan Hoang
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Three-dimensional fluid-thermal–mechanical coupling numerical modeling of elastocaloric cooler for electronic chip Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Xingkun Dong, Xiangjun Jiang, Peng Li, Yong Mi, Qi Liu
The rapid progress in electronic component integration poses formidable challenges to electronic circuit thermal design. The elastocaloric cooling system is a promising solution to address the escalating need for efficient small-scale cooling and temperature control. This study aims to develop an electronic chip cooler based on the elastocaloric effect of shape memory alloys. To more accurately capture
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Design and experimental analysis of condensate pan for plug-in refrigerated display cabinets: Improving drying efficiency Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Süleyman Erten, Melis Öder, Mustafa Aktaş, Seyfi Şevik, Buğra Şensoy
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Performance map of the hydraulic air compressor (HAC) installed at Dynamic Earth, Sudbury Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Dean L. Millar, Stephen M. Young
After a 6-month construction phase, the approximately 30m high hydraulic air compressor (HAC) demonstrator facility installed at the Dynamic Earth science centre in Sudbury was officially opened on June 21, 2017. For the first time in the open literature, this paper presents experimental results from a large scale hydraulic air compressor, which proves their performance as an energy efficiency technology
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Pool boiling heat transfer characteristics of low-GWP refrigerants in a horizontal tube bundle configuration Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 M. Muneeshwaran, Cheng-Min Yang, Ercan Cakmak, Kashif Nawaz
Heat transfer enhancement techniques have been adapted on the shell side to improve the overall performance of the flooded evaporators, such as finned tubes. In recent years, it has been demonstrated that the metal foam structure can offer enhanced heat transfer performance under pool boiling conditions. However, there are not much research in the open literature that examine the feasibility of metal
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Energy consumption during transient operation of coal-fired generating units with cold end system back pressure regulation Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-18 Yuanhao Li, Linrui Zhao, Xuan Zhang, Huimin Wei, Xiaoze Du
The dynamic characteristics of key parameters were investigated in this study, which reflected the operational flexibility and efficiency of thermal power units during load regulation. A refined model of the cold end of the unit was proposed. Simultaneously, an innovative exploration was conducted into the coordinated achievement of flexible load regulation and the promotion of energy-efficient operations
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Optimal design and performance analysis of anode flow channels in proton exchange membrane water electrolyzers Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-17 Chao Su, Zhidong Chen, Hongwei Zhan, Zhengyu Wang, Dingchen Zhang, Zexuan Wu, Kaiyang Li, Lijun Yang, Xiaoze Du, Junhong Hao, Yanqiang Kong, Naiqiang Zhang
In proton exchange membrane water electrolysis, the water/oxygen distribution characteristics in the anode channel significantly affect the electrolyzer performance. In this paper, a three-dimensional two-phase non-isothermal numerical model of the electrolyzer is established, in which the reaction kinetics equation is modified theoretically and is validated experimentally. Two novel anode channel
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An empirical study on thermal efficiency and dusty moisture removal efficiency using enthalpy wheel in industrial waste incineration plant Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-17 Young Bae Kim, Hyosoon Park, Yulki Kim
In this work, an empirical study is conducted on the waste heat recovery and moisture removal performance of an enthalpy wheel installed in an industrial waste incineration plant. The enthalpy wheel made of a metal mesh is placed in parallel with the wet scrubber of the incineration plant to exchange heat with high-temperature exhaust at 200 °C. In the enthalpy wheel, exhaust gas and external air exchange
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Employing extended surfaces for a hybrid battery thermal management system comprising PCM and refrigerated cooling air: An experimental investigation Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-17 S.P. Sajedi, G.R. Molaeimanesh
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Quasi-one-dimensional approach to heat transfer: General formulation and its application to transformer windings Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-17 Peter Bokes, Goran Bulatovič
A quasi-one-dimensional approach to conduction heat transfer with convective boundary conditions is developed for bodies of variable geometry. The novelty of the method is demonstrated on the windings in oil-filled distribution transformers with partial cooling ducts. We obtain analytical solution for the windings average temperature rise and tangential temperature distribution and find them in an
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Natural draft direct dry cooling system performance at various application scales under windless and windy conditions Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-17 Wian Strydom, Johannes Pretorius, Jaap Hoffmann
The natural draft direct dry cooling system (NDDDCS) presents a promising alternative to conventional forced draft air-cooled condensers (ACCs) and indirect natural draft dry cooling systems, overcoming their limitations by efficiently condensing process steam directly and passively. The NDDDCS achieves superior thermal efficiencies while reducing system complexities, operational costs, and auxiliary
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Effects of pressure ratio allocation on the flow characteristics in a five-stage ionic liquid compressor Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-17 Lingzi Wang, Yiling Liao, Qi Wang, Yi Guo, Jianmei Feng, Xueyuan Peng
Ionic liquid compressors are a new type of hydrogen compressor technology with significant advantages when applied to high-pressure hydrogen refueling stations, where multi-stage compression is an ideal solution. The utilization of a liquid piston introduces complex two-phase flow phenomena within the cylinders, and understanding the characteristics of two-phase flow is crucial for the thermodynamic
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A computational model of an air-layer radiant cooling panel for optimizing and design Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-17 Yuelong Tan, Min Tu, Chao Li, Xiaopeng Song, Junlu Fang
Radiant cooling systems have become a research hotspot in recent years. The air-layer radiant cooling panel always had good performance, but there is relatively little research on it. This paper aims to optimize an air-layer radiant cooling panel by establishing a computational model and analyzing its accuracy through experiments. Through the computational model, the effects of surface emissivity,
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An integrated cell-to-pack design based on an origami sandwich structure to enhance cooling and mechanical performances of battery packs in electric vehicles Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Ruifeng Li, Guoxing Lu, Weixiang Shen, Justin Leontini
The rapid growth in the energy density of batteries in electric vehicles has led to the need for complex structural components and cooling systems to ensure the safety of the battery pack. However, these inactive materials occupy a significant portion, accounting for at least 35% of the pack's volume. To enhance the volume utilization rate of the battery pack, this paper proposes a novel origami structure
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Moisture absorption and desorption characteristics and prediction model analysis of building thermal insulation materials Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Kang Liu, Hongda Niu, Yingying Wang
Understanding the isothermal moisture absorption and desorption characteristics of building thermal insulation materials and how they affect thermal conductivity, is curial for accurate building thermal design and energy-saving calculation. In this paper, five types of building thermal insulation materials are selected for investigation. First, the variation trend of the equilibrium mass moisture content
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Green hydrogen energy source for a residential fuel cell micro-combined heat and power Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Rafik Elkhatib, Taoufiq Kaoutari, Hasna Louahlia
In this paper, fuel cell micro combined heat and power with green hydrogen production is investigated for a residential house. Solar and wind energy were investigated for green hydrogen production. The performance of the micro-CHP system was evaluated using yearly energy coverage rate as an index, defined by the energy production and need ratio. A dynamic mathematical model of PEM fuel cell combined
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Thermal runaway and soot production of lithium-ion batteries: Implications for safety and environmental concerns Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Yabei Xu, Yongjin Wang, Xinzhe Chen, Kehui Pang, Bingxin Deng, Zhiyue Han, Jiankun Shao, Kun Qian, Dongping Chen
Global energy shortages are becoming increasingly severe, and lithium-ion batteries are becoming an important substitute for fossil fuels. However, thermal runaway of a battery is a significant factor impacting battery industry development. Here, we conducted tests on battery thermal runaway using a combustion test chamber, analysing the effects of natural aging and state of charge (SOC) on battery
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A prediction model based on data-driven method for velocity and heat transfer coefficient of falling-film liquid on horizontal tube Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Shun Hu, Xingsen Mu, Yibo Yang, Shengqiang Shen, Jiuzheng Zhang, Qi Wang
The prediction of liquid film velocity and heat transfer coefficient of horizontal-tube falling-film flow is important for the investigation and enhancement of the flow and heat transfer behavior. To date, the prediction mainly relies on semi-empirical-semi-theoretical formulas based on data fitting. This prediction method has many limitations and assumptions on working conditions, and the error is
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Modeling microwave heating for enhanced shale gas recovery: Fully coupled two-phase flows with heat transfer and electromagnetism in deformable reservoirs Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Chao Sun, Weiqun Liu, Bo Wang, Tianran Ma, Chaobin Guo
To investigate the mechanisms of fluid migration during shale gas extraction under microwave irradiation, we developed a coupled Electromagnetic-Thermal-Hydraulic-Mechanical (ETHM) model. This model accounts for changes in fracture permeability due to variations in temperature, gas pressure, and methane desorption. The impact of microwave power on both gas production and the alteration of reservoir
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Experimental and numerical investigation of thermal interactions between high-temperature borehole heat exchangers in unsaturated and low permeable soil Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Bo Wang, Christof Beyer, Murat Aydin, Sebastian Bauer
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Influence of conjugate thermal boundary on turbulent heat transfer of supercritical CO2 in the horizontal tube Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Xiongzhou Xie, Daoming Ye, Jishuang Gong, Shilong Zhao, Jianyong Wang
In numerical simulations on horizontal supercritical heat transfer, the tube model excluding or including the solid wall is usually employed. However, a systematic comparison and in-depth elucidation between the non-conjugate and conjugate heat transfer (NCHT, CHT) models are still in absence. To address this critical issue, the present work employs both horizontal models to perform comparative numerical
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Experimental and economic evaluation on the performance improvement of a solar photovoltaic thermal system with skeleton-shaped fins Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Abdelkrim Khelifa, Mohammed El Hadi Attia, K. Harby, Abd Elnaby Kabeel, Moataz M. Abdel-Aziz, Mohamed Abdelgaied
At elevated ambient temperatures, the production and efficiency of solar panels are degraded due to the overheating of the cells. Cooling photovoltaic cells at elevated ambient temperatures can prevent overheating, extend their life, and enhance overall efficiency, particularly in areas exposed to strong sunlight and elevated temperatures. In this study, an attempt was made experimentally to increase
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Numerical investigation and optimisation of solid–solid phase change material composite-based plate-fin heat sink for thermal management of electronic package Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Midhun V.C., Mayank Maroliya, Sandip K. Saha
Phase Change Material based Thermal Management Systems show promise in electronic packaging systems for safe operation, acting as a thermal storage element to prevent sudden temperature surges, enhancing operational time and mitigating electronic system failures. Therefore, the meticulous design of a solid–solid phase change material (SSPCM) based heat sink with fins is imperative for effective electronic
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Feasibility and performance evaluation of film cooling using incoming air in a gel-fueled scramjet Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Hongbin Yan, Song Yang, Wei-Tao Wu, Feng Feng
Gel-fuels with metal particles have high specific impulse, lowered volatility and reduced risk of leakage compared with conventional liquid fuels, which are promising fuel candidates in scramjet engines. However, these non-Newtonian fluids with unique rheological properties are not suitable for active cooling. To address this issue, this paper proposes a film cooling strategy using the incoming air
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Pin fin-PCM composite heat sink solution for thermal management of cylindrical Li-ion battery Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Rajesh Akula, Abhiram Minnikanti, C. Balaji
Phase Change Material (PCM) based heat sink is a state-of-the-art cooling technique for the effective thermal management of Lithium-ion batteries (LIBs). The low thermal conductivity of PCMs () adversely affects their cooling performance. Fins are the most commonly used structures in augmentation with PCMs to enhance their effective thermal conductivity. All the studies on the thermal management of
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Performance investigation on dual bed adsorption chiller integrated with a partially covered N-PVT collector Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Manigandan Sidhareddy, Sumit Tiwari
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Mathematical modeling validation of experimental brine droplet freeze desalination with phase change under natural free convection Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Symeon Savvopoulos, Hongtao Zhang, Khadije El Kadi, Haralampos Hatzikirou, Isam Janajreh
Freeze desalination (FD) emerges as an innovative and eco-friendly approach to water purification, utilizing sub-zero temperatures to crystallize and segregate salts and impurities from brine. This study presents a novel comprehensive mathematical model that describes all cooling stages and ice purification processes within saline water droplet freezing under natural free convection. This model integrates
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Improving Li-ion battery thermal management via hydrogel evaporative cooling Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 S.A.M. Mehryan, Hamid Jannesari
Thermal management plays a pivotal role in the design of Li-ion batteries, making it a critical subject of extensive research. Among the various methods explored in this field, the use of hydrogel stands out. The combination of water evaporation within the hydrogel and convection cooling techniques could affect the performance of this method. Actually, the influence of key parameters, such as the relative
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Thermodynamic analysis and performance assessment of different feed configurations for solar multi-effect distillation plant Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-16 Hassen Dhouha, Chekir Nihel, Khir Tahar
The solar multi-effect distillation is a promising technology to overcome water scarcity. Thermodynamic optimization and performance assessment of six feed configurations of a multi-effect distillation system are performed. The main objective of this research is to improve the system's efficiency and to reduce heat consumption. The optimum ranges of the heating steam temperature and the heating steam
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Thermal performance and applied evaluation of the pre-bored grouting planted nodular pile in warm frozen soil Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-15 Qi Zhang, Tianqi Zhang, Yuanhong Dong, Tianyuan Zhang, Yao Wei, Ruoyu Hao, Nanlu Zhao, Haowei Du
The thermal effect of pile foundation in frozen ground is crucial for the formation of its bearing capacity. To break through the problems of strong thermal disturbance and slow formation of bearing capacity in the existing pile foundations. In this paper, a new type of pile named Pre-bored Grouting Planted Nodular (PGPN) was first introduced to the permafrost area, which was a prefabricated composite
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Experimental optimization of a spectrum-splitting photovoltaic-thermoelectric hybrid system Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-15 Shu Yang, Ershuai Yin, Qiang Li, Yingping Long
This paper provides a comprehensive experimental optimization of a spectrum-splitting photovoltaic-thermoelectric hybrid system. A steady-state experimental setup is established. The properties of the coupling system with different splitter cutoff wavelengths and thermoelectric device structures are tested and compared with the single photovoltaic system under the same conditions. The effects of concentration
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Experimental study of ambient temperature and humidity distribution in large multi-span greenhouse based on different crop heights and ventilation conditions Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-15 Qianjun Mao, Hongwei Li, Chenchen Ji, You Peng, Tao Li
Analyzing the distribution of temperature and humidity within a greenhouse is essential for optimizing ventilation strategies and improving crop quality and yield. The temperature and humidity distribution of eight-span greenhouse under natural ventilation and mechanical ventilation is studied experimentally. The influence of different crop height on temperature and humidity distribution in greenhouse
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Ultra-efficient and thermally-controlled atmospheric structure deicing strategy based on the Peltier effect Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-15 Li Wang, Lichun Shu, Yunlong Lv, Qin Hu, Lie Ma, Xingliang Jiang
Snow and ice coverage pose significant threats to the safe and stable operation of energy equipment. To address the challenges of high power consumption and thermal damage to materials resulting from prolonged use of thermal ice melting technology, this study developed and tested a low-power, thermally controlled de-icing system. The system employs thermoelectric material as the heating element to
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Numerical investigation on the impact of circumferentially varying temperature on the buoyancy and heat transfer characteristics of supercritical CO2 natural circulation loop Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-13 Vignesh Boopalan, Senthil Kumar Arumugam, P. Rajesh Kanna
The non-uniform heating in the supercritical natural circulation loop (SCNCL) and its associated heat transfer behaviour and buoyancy variation are not well understood. Since buoyancy is the primary force that drives fluid motion in the SCNCL, any factor affecting buoyancy will have an impact on overall performance. The present study investigated the circumferentially varying temperature (CVT) at the
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A dynamic mathematical model used for controller design of a supercritical once-through boiler-turbine unit in all load conditions Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-12 Yan Xie, Ji-zhen Liu, De-liang Zeng, Yong Hu, Yan-song Zhu, Rui-lian Li
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Examination of convective heat transfer and entropy generation performance in twisted elliptical tubes using response surface method Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-12 Xiuzhen Li, Junqi Feng, Yingying Tan, Zhanwei Wang, Guo Tian, Lin Wang
In this paper, the convective heat transfer (CHT) and flow properties of twisted elliptical tubes (TETs) are numerically simulated within the range of Reynolds numbers () 710 to 4790. The effects of design parameters such as twist ratio (/), aspect ratio (/), and on the CHT and flow resistance properties of TETs are highlighted. The response surface method (RSM) is used to research the effect of interaction
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Numerical investigation on mixed convection for laminar molten salt in horizontal square tubes Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-11 Yang Yang, Yang Zou, Zhijun Li
Molten salts are the key working media in nuclear and new energy fields. However, the mixed convection of molten salt is rarely investigated. The mixed convection of laminar flow in horizontal square tubes with constant heat flux is analyzed using Fluent software for the first time. The effects of heat flux, inlet temperature and Reynolds number on the flow and heat transfer performances are evaluated
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Data-driven dimensional analysis of critical heat flux in subcooled vertical flow: A two-stage machine learning approach Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-11 Kuang Yang, Zhicheng Liang, Bo Xu, Zhenghui Hou, Haijun Wang
This study presents a novel two-stage machine learning algorithm that identifies dominant dimensionless numbers for critical heat flux (CHF) prediction, circumventing the limitations of traditional dimensional analysis by integrating the Buckingham Pi theorem with advanced computational methods, including the active subspace method and machine learning. When applied to extensive datasets, including
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Performance evaluation and optimization of the cascade refrigeration system based on the digital twin model Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-10 Yanpeng Li, Yiwei Feng, Chuang Wang, Ziwen Xing, Dawei Ren, Lin Fu
Cascade refrigeration systems (CRSs) have become the priority choice in low-temperature applications, causing severe energy waste due to the lack of practical control strategies. Currently, refrigeration simulations are mainly based on the simplified thermodynamic or Artificial Intelligence (AI) model. However, the former is insufficiently accurate, while the latter is of unclear thermodynamic significance
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Validation of a mathematical model for the simulation of a multitubular and multitask solar reactor Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-10 H. Sánchez-Mora, A. Santamaria-Padilla, H. Romero-Paredes, Heidi I. Villafán-Vidales
Solar reactors represent an opportunity to obtain chemical reactions at high temperatures, saving costs in energy supply through the concentration of solar energy. Multitubular and Multitask (M&M) solar reactors are one of the options that allow the production of hydrogen and the production of synthesis gas through the gasification of hydrocarbon materials. The complexity of the phenomena involved
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Thermal stability of trifluoroiodomethane (R13I1) as an environmentally friendly working fluid for refrigeration and heat pump systems: Investigations and improvement strategies Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-10 Yubo Chen, Zhao Yang, Yansong Hu, Yong Zhang, Hongxia He
Trifluoroiodomethane (R13I1) has attracted extensive attention because of its excellent environmental protection performance and flame retardant effect. However, R13I1 has poor thermal stability due to the presence of C-I bonds, which greatly limits its application in refrigeration and heat pump systems. At present, there are few theoretical and experimental studies on the thermal stability of R13I1
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Applying indirect evaporative chillers for comfort cooling in Northern European commercial buildings: A case study in Sweden Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-10 Tianhao Xu, Yang Jing, Hatef Madani, Xiaoyun Xie, Yi Jiang
Indirect evaporative chiller (IEC) can produce chilled water below the wet-bulb temperature of outdoor air. To evaluate the potential of applying indirect evaporative chillers for covering the high indoor sensible cooling loads in commercial buildings of Northern European countries, a case study based on a real commercial building in Stockholm was carried out assuming renovation of the existing air-conditioning
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Process control and energy saving in the ladle stage of a metal casting process through physics-based and ANN-based modelling approaches Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-10 Rita Mastrullo, Alfonso William Mauro, Francesco Pelella, Luca Viscito
The process and temperature control of metal casting applications is of utmost importance both to guarantee the good quality of the final product and also to pursue an energy saving policy. For this purpose, in this paper two different modelling approaches have been proposed to predict the liquid steel temperature inside a ladle for metal casting, shortly before the casting process. The first is a
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Flow structure and cooling effect of seeping gas film in supersonic turbulent boundary layer Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-09 Q. Mi, S.H. Yi, D.D. Gang, X.G. Lu, M.X. Liu
Seeping gas film cooling is an active cooling method that involves injecting a cooling gas film into the boundary layer through porous media. In this study, a sintered wire mesh porous material is used to generate the gas film through seepage flow. The flow of the gas film in the supersonic turbulent boundary layer is observed using nanometer particle plane laser scattering technology, while the temperature
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Effects of split injection strategy on combustion characteristics and NOx emissions performance in dual-fuel marine engine Appl. Therm. Eng. (IF 6.4) Pub Date : 2024-04-09 Longlong Jiang, Ge Xiao, Wuqiang Long, Dongsheng Dong, Fuxing Wei, Jianlin Cao, Yang Wang, Hua Tian
In order to address environmental concerns and promote sustainable development, the maritime industry is facing a demand to reduce emissions from ship engines. To address this, a growing trend in the development of diesel natural gas dual-fuel marine engine involves implementing more flexible diesel injection strategies, with the aim of enhancing performance and minimizing harmful emissions. This study