Heat Transfer最新文献_第10页

Experimental and parametric analysis of a novel hybrid thermal management strategy for cylindrical lithium-ion cells 圆柱形锂离子电池新型混合热管理策略的实验和参数分析

IF 2.8

Heat Transfer Pub Date : 2024-04-17 DOI: 10.1002/htj.23063

Seham Shahid, Martin Agelin-Chaab

{"title":"Experimental and parametric analysis of a novel hybrid thermal management strategy for cylindrical lithium-ion cells","authors":"Seham Shahid, Martin Agelin-Chaab","doi":"10.1002/htj.23063","DOIUrl":"10.1002/htj.23063","url":null,"abstract":"This paper reports on a novel hybrid thermal management strategy. It uses secondary coolants (air and liquid) to withdraw heat simultaneously from the composite phase change material, resulting in increased heat extraction capability of the composite phase change material and improved thermal environment of the battery module. The significance of this strategy is that the fluid used in the liquid cooling stays stationary. Comprehensive experimental and numerical studies are performed, and parametric studies are conducted to reduce the volume of the phase change material, size of the air duct, and airflow Reynolds number. The numerical results showed that the maximum temperature was limited to 27.8°C, and a high-temperature uniformity of 0.4°C was obtained. Furthermore, the required volume of the composite phase change material is reduced by ~50%. Additionally, beyond a 6 mm height of the air duct, the reduction in maximum pressure drop is not significant enough, and it is considered the optimal height, and a Reynolds number of 1950 is considered the optimal airflow Reynolds number. Therefore, the proposed thermal management concept for the battery module can sustain the thermal environment needed for the effective operation of Lithium-ion batteries.","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"53 6","pages":"2840-2863"},"PeriodicalIF":2.8,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/htj.23063","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140690410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of heat and mass transport to free stream for Cross fluid flow past an expanding cylinder 研究经过膨胀圆柱体的交叉流体自由流的热量和质量传输

IF 2.8

Heat Transfer Pub Date : 2024-04-17 DOI: 10.1002/htj.23062

Smit Yadav, Vikas Poply, Pardeep Yadav, Naresh Sharma

{"title":"Investigation of heat and mass transport to free stream for Cross fluid flow past an expanding cylinder","authors":"Smit Yadav, Vikas Poply, Pardeep Yadav, Naresh Sharma","doi":"10.1002/htj.23062","DOIUrl":"10.1002/htj.23062","url":null,"abstract":"The investigation is about the effect of heat and mass transportation over a dragging out cylinder for Cross fluid flow in addition to free stream. This research is a notable effort to measure heat and mass transportation of the flow over an expanding cylinder with the imposition of the external flow. The system of complex partial differential equations is converted into highly nonlinear ordinary differential equations. The solution of the nonlinear system of equations is made with the numerical technique Runge-Kutta fifth order just after the implementation of the shooting technique with suitable conditions. MATLAB solver bvp4c has solved the problem of the flow over stretching cylinder very efficiently and presents the facts in the form of the graphs and numerical values. The results claim that for the values of gamma parameter from 0.1 to 0.5 the rate of heat transfer increases by 14% on the other lambda with values from 0.1 to 0.3 the heat transfer rate declines 11%. For the growing values of Schmidt number from 1.0 to 5.0 the rate of mass transfer decreases by 85%. The rate of heat transfer has fallen by 86% for the improving values of the Prandtl number from 1, 2, and 3.","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"53 6","pages":"2826-2839"},"PeriodicalIF":2.8,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140691057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental comparison of pool boiling characteristics between CNT, GO, and CNT + GO-coated copper substrate 实验比较 CNT、GO 和 CNT + GO 涂层铜基底的池沸腾特性

IF 2.8

Heat Transfer Pub Date : 2024-04-17 DOI: 10.1002/htj.23061

Ranjan Kumar, Prity Kumari, N. Rahul, Dipak Sen, S. K. Mandal

引用次数: 0

Heat transfer coefficient simulation and temperature distribution prediction of wire loops in the Stelmor air-cooling system Stelmor 空气冷却系统中导线环的传热系数模拟和温度分布预测

IF 2.8

Heat Transfer Pub Date : 2024-04-16 DOI: 10.1002/htj.23060

Qianlong Zhao, Fuyong Su, Bin Li, Cunwang Li, Guangyan Fan

引用次数: 0

Exact solutions of hydromagnetic convective flow in a microchannel with superhydrophobic slip and temperature jump: Microfluidics applications 具有超疏水滑移和温度跃迁的微通道中水磁性对流的精确解：微流控应用

IF 2.8

Heat Transfer Pub Date : 2024-04-15 DOI: 10.1002/htj.23055

Kiran Sajjan, C. S. K. Raju

{"title":"Exact solutions of hydromagnetic convective flow in a microchannel with superhydrophobic slip and temperature jump: Microfluidics applications","authors":"Kiran Sajjan, C. S. K. Raju","doi":"10.1002/htj.23055","DOIUrl":"10.1002/htj.23055","url":null,"abstract":"The researchers explored the free convective flow of a hybrid nanofluid in a vertical microchannel with a rectangular cross-section. Notably, both channel walls were heated alternately, and a transverse magnetic field was applied across the channel. The channel walls had unique properties, one of which was nonslip and the other was exceedingly hydrophobic. The major purpose was to investigate the effects of magnetism and superhydrophobicity on important flow parameters. The differential equations in the investigation were solved, producing accurate results. The study yielded some significant discoveries. First, when heated, the magnetic parameter reduced skin friction on both sides. Second, in both heating conditions, the magnetic field reduced flow rate and velocity. The flow rates in the two reported situations were similar at a crucial temperature jump coefficient. Furthermore, for low-temperature jump coefficients, heating the superhydrophobic side reduced the Nusselt number whereas heating the nonslip side had no magnetic effect. The percentage change in the value of Nusselt number and velocity decreases continuously with increase in nonlinear density variation with temperature (NDT) parameter and magnetic parameter. The percentage increases in the value of skin friction with increase in temperature jump and slip length but decrease in the percentage of skin friction for the effect of magnetic term and NDT parameter. As the NDT parameter increases, the velocity percentage rises to 50.59% when the superhydrophobic surface is heated and to 84.30% when the nonslip surface is heated. The temperature jump is statistically significant for the value of the Nusselt number and skin friction for the no-slip surface condition. These discoveries have practical consequences for the design and management of both tiny and large-scale systems, with possible applications in microfluidics, microelectronics, nanoscience, and nanotechnology.","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"53 6","pages":"2749-2792"},"PeriodicalIF":2.8,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140700191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of the enhancement in the performance of a hybrid flat plate solar collector using water and air as working fluids 以水和空气为工作流体的混合平板太阳能集热器性能提升研究

IF 2.8

Heat Transfer Pub Date : 2024-04-15 DOI: 10.1002/htj.23048

Shams Kamil Kutafa, Al-Saiydee Mahmmod A. Muhammed

{"title":"Study of the enhancement in the performance of a hybrid flat plate solar collector using water and air as working fluids","authors":"Shams Kamil Kutafa, Al-Saiydee Mahmmod A. Muhammed","doi":"10.1002/htj.23048","DOIUrl":"10.1002/htj.23048","url":null,"abstract":"A hybrid flat solar collector was manufactured from basic materials to combine the effects of both water and air solar heaters. The reason is to increase the amount of heat delivered to water by doubling the heat sources, one from the direct beam of sun and the other from the hot air delivered by the air solar heater. In addition, the flow of water inside the solar heater is made in a thin layer so that much heat can be gained by water per unit time. The outlet hot air of the solar air heater enters air ducts that pass through the solar water heater. With a constant water flowrate of 0.0167 kg/s, three different air velocities (1.7, 2.1, and 2.4 m/s) were applied to determine the optimum air velocity that results in the maximum outlet water temperature and the maximum removal factor FR for the solar water heater. The experiment was run from 10:00 a.m. to 2:00 p.m. every day during June 2023 and the data was recorded every 15 min. The data obtained from the experiment showed that the lowest air speed (1.7 m/s) results in the highest outlet water temperature (63°C) and heat removal factor FR (0.74).","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"53 6","pages":"2736-2748"},"PeriodicalIF":2.8,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140701199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radiation absorption effect on MHD natural convective flow past an impulsively started infinite vertical plate with chemical reaction and thermal radiation 辐射吸收效应对经过带化学反应和热辐射的冲动式启动无限垂直板的 MHD 自然对流的影响

IF 2.8

Heat Transfer Pub Date : 2024-04-11 DOI: 10.1002/htj.23057

Richa Deb Dowerah, Nazibuddin Ahmed, Hiren Deka

{"title":"Radiation absorption effect on MHD natural convective flow past an impulsively started infinite vertical plate with chemical reaction and thermal radiation","authors":"Richa Deb Dowerah, Nazibuddin Ahmed, Hiren Deka","doi":"10.1002/htj.23057","DOIUrl":"10.1002/htj.23057","url":null,"abstract":"The current work is interested on investigating the impacts of thermal radiation, chemical reaction, and absorption radiation of a hydromagnetic convection-free mass and heat transfer flow in case of an electrically conducting fluid that passes through a vertical plate moving impulsively. The analytical solutions of the governing momentum, energy, and species concentration equations with the initial and boundary conditions are obtained by the Laplace transformation technique. Graphs for fluid characteristics are used to analyze the impact of changing parametric quantities such as M, N, Sc, Kc, Q, Gr, Gm, and t on the temperature, velocity, concentration, and Sherwood number. We derive the engineering curiosity expressions for the Nusselt number and stress, and at the end, we tabulate and discuss the consequences of new parameters. The magnetic field effect and the chemical reaction are seen to diminish the fluid velocity and concentration, respectively, but in contrast, the absorption radiation effect is seen to accelerate both velocity and temperature. It is closely studied that the Nusselt number and skin friction values for hydrogen consistently exceed those for carbon monoxide.","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"53 6","pages":"2689-2711"},"PeriodicalIF":2.8,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140715479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of nanolayer and particle size on fluid transport through rotating disks 评估纳米层和颗粒大小对流体通过旋转盘的影响

IF 2.8

Heat Transfer Pub Date : 2024-04-11 DOI: 10.1002/htj.23059

Akinbowale T. Akinshilo

{"title":"Evaluation of nanolayer and particle size on fluid transport through rotating disks","authors":"Akinbowale T. Akinshilo","doi":"10.1002/htj.23059","DOIUrl":"10.1002/htj.23059","url":null,"abstract":"In this paper, the impact of nanolayer which shows the relationship between the nanoparticle and pure fluid is investigated on the fluid transport and thermal transfer through a rotating system. The nanolayer shows the relationship between the nanoparticle and base liquid, signifying a higher thermal conductivity than the nanoparticle and lower conductivity than the base fluid. Also, the effect of larger nanoparticle size and volume on fluid thermal distribution is considered. The nanoparticle raises the fluid thermal conductivity with the aim of conserving thermal transfer during fluid transport, consequently saving energy. The mechanics of the fluid is developed using a higher-order coupled system of nonlinear models, solved with the aid of the Homotopy perturbation method. Obtained results from the analysis show the impact of nanolayer expansion on thermal distribution increases boundary layer thickness. Also, the size of the nanoparticle when varied from 10 to 40 nm shows a heat transfer increase of 17.02% at the center of the disk. Particle size increase indicates temperature rise as nanolayer size encompassing the nanoparticle increases. Obtained results when compared against literature give good agreement. The study finds useful applications in coolant and lubricant processing amongst other practical applications.","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"53 6","pages":"2712-2735"},"PeriodicalIF":2.8,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140714805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing cooling performance and economic analysis of a vertical earth air heat exchanger (VEAHE) through geometric shape optimization 通过几何形状优化提高垂直地球空气热交换器（VEAHE）的冷却性能和经济性分析

IF 2.8

Heat Transfer Pub Date : 2024-04-10 DOI: 10.1002/htj.23056

Mohammadreza Hasandust Rostami

{"title":"Enhancing cooling performance and economic analysis of a vertical earth air heat exchanger (VEAHE) through geometric shape optimization","authors":"Mohammadreza Hasandust Rostami","doi":"10.1002/htj.23056","DOIUrl":"10.1002/htj.23056","url":null,"abstract":"The cooling and heating sector is responsible for the highest energy consumption in the building sector, comprising approximately 30% of the total. Extensive research has been conducted to address this issue and minimize energy consumption through the implementation of innovative technologies. Among these technologies, the passive earth-air heat exchanger (EAHE) has proven highly effective in reducing energy usage in the cooling and heating sector. This research focused on optimizing U-shaped EAHE systems and examined their functional and thermal-fluidic parameters through numerical analysis. The simulation employed COMSOL Multiphysics software, and the results obtained were in excellent agreement with experimental data. The study investigated a base case, as well as five optimized cases with varying inlet velocities, to evaluate performance. The findings revealed that increasing the working fluid's inlet velocity led to a decrease in the system's thermal efficiency. However, at higher velocities, the economic parameters for energy production showed improvements. Specifically, the system generated a maximum energy output of 9132 W in the fifth case, operating at a velocity of 2 m/s. Additionally, the system achieved an impressive performance coefficient of approximately 5.13 in the same case, with an inlet velocity of 0.46 m/s. Notably, the lowest recorded output temperature of the system was 22°C at the specified inlet velocity.","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"53 6","pages":"2661-2688"},"PeriodicalIF":2.8,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140717056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Volumetric heating and AC electric field effects on porous convection with general boundary conditions 一般边界条件下多孔对流的体积加热和交流电场效应

IF 3.6

Heat Transfer Pub Date : 2024-04-01 DOI: 10.1002/htj.23054

Chowlahiriyur Shivappa Rachitha, Chikkanalluru Erappa Nanjundappa, Inapura Siddagangaiah Shivakumara

{"title":"Volumetric heating and AC electric field effects on porous convection with general boundary conditions","authors":"Chowlahiriyur Shivappa Rachitha, Chikkanalluru Erappa Nanjundappa, Inapura Siddagangaiah Shivakumara","doi":"10.1002/htj.23054","DOIUrl":"10.1002/htj.23054","url":null,"abstract":"The onset of convective instability in an internally heated dielectric fluid-saturated porous layer under the influence of a uniform AC electric field for different types of boundary conditions is investigated. The flow in the porous medium is described by the Brinkman model with fluid viscosity different from effective viscosity. The lower adiabatic and the top with finite heat transfer coefficient to the external environment boundaries are considered to be either rigid or stress-free. The presence of a uniform volumetric heat source alters the conduction profile of the temperature field from linear to quadratic in the vertical coordinate. A modal linear stability analysis of the basic motionless state is carried out and the general regime of linear instability is investigated by solving the stability eigenvalue problem numerically using the Galerkin method of weighted residual technique. The neutral stability condition as well as the critical value of the thermal Rayleigh number is computed for rigid–rigid, free–free, and rigid–free boundaries for various values of governing parameters. It is seen that the nature of boundaries affect the stability of the system only quantitatively, though not qualitatively. The rigid–rigid boundaries offer a more stabilizing effect against convection in comparison with rigid–free and free–free boundaries. The study found that the effect of increasing thermal electric Rayleigh number and the Darcy number is to hasten the onset of instability, while the opposite trend is perceived with an increase in the ratio of viscosities and Biot number. The outcomes of this investigation are found to be in good agreement with past studies under the limiting cases.","PeriodicalId":44939,"journal":{"name":"Heat Transfer","volume":"53 5","pages":"2636-2656"},"PeriodicalIF":3.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140772553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0