Heat Transfer Research最新文献_第6页

The Effect of Corrugation on Heat Transfer and Pressure Drop in a Solar Air Heater: A Numerical Investigation 波纹对太阳能空气加热器传热和压降的影响：数值研究

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2024-01-01 DOI: 10.1615/heattransres.2024050336

Aneeq Raheem, Waseem Siddique, Shoaib A.Warraich, Khalid Waheed, Inam Ul Haq, Muhammad Tabish Raheem, Muhammad Muneeb Yaseen

{"title":"The Effect of Corrugation on Heat Transfer and Pressure Drop in a Solar Air Heater: A Numerical Investigation","authors":"Aneeq Raheem, Waseem Siddique, Shoaib A.Warraich, Khalid Waheed, Inam Ul Haq, Muhammad Tabish Raheem, Muhammad Muneeb Yaseen","doi":"10.1615/heattransres.2024050336","DOIUrl":"https://doi.org/10.1615/heattransres.2024050336","url":null,"abstract":"Solar is a green source of energy. The foremost objective is the efficient heating of air by enhancing the thermal efficiency of Solar Air Heaters. Even a small enhancement in efficiency will increase its life, power output and reduce its operating cost. In current study double pass, trapezoidal cross-sectioned channel with four different arrangement of corrugations at bottom and trailing wall of outlet pass is numerically investigated at a Re equals to 9400. Corrugations are of trapezoidal shape having pitch to height ratio (p/e) equals to 4. Four different arrangements of trapezoidal corrugation at bottom wall and trailing wall of outlet pass is investigated. When compared to a smooth trapezoidal channel, it turns out that an inline arrangement of corrugation enhances heat transfer by 33% while increasing friction factor by up to 27%. Also, compared to a staggered ribbed trapezoidal channel, inline corrugation patterns improve heat transfer by 7% and reduce friction by up to 16%.. Corrugations with staggered arrangement gives slightly better results but as space for passive cooling ducts in solar air heaters is limited therefore concerns regarding fabrication and less mechanical strength arises. Effect of increasing Reynolds number in trapezoidal corrugated channel shows increasing trend in Nu/Nuo, pressure drop and thermal performance factor.","PeriodicalId":50408,"journal":{"name":"Heat Transfer Research","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139476306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THERMAL MANAGEMENT OF LITHIUM-ION BATTERY PACKS BY USING CORRUGATED CHANNELS WITH NANO-ENHANCED COOLING 利用具有纳米增强冷却功能的波纹通道实现锂离子电池组的热管理

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2024-01-01 DOI: 10.1615/heattransres.2024051267

Fatih Selimefendigil, Aykut Can, Hakan Fehmi Oztop

引用次数: 0

Preparation method and thermal performance of a new ultra-thin flexible flat plate heat pipe 新型超薄柔性平板热管的制备方法和热性能

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2024-01-01 DOI: 10.1615/heattransres.2024051529

Xuancong Zhang, Jinwang Li, Qi Chen

{"title":"Preparation method and thermal performance of a new ultra-thin flexible flat plate heat pipe","authors":"Xuancong Zhang, Jinwang Li, Qi Chen","doi":"10.1615/heattransres.2024051529","DOIUrl":"https://doi.org/10.1615/heattransres.2024051529","url":null,"abstract":"Ultra-thin flat plate heat pipes must provide a degree of flexibility to meet foldable electronics heat dissipation requirements. In this paper, a new flexible ultra-thin flat plate heat pipe with a thickness of 0.75 mm has been designed and fabricated. Compared with the traditional flexible ultra-thin flat heat pipe, the innovation lies in the flexible insulation section formed by epoxy resin pouring of the shell. The design of the shell ensures that the flexible ultra-thin plate heat pipe can respond quickly to the external temperature change, and also has good flexibility, which provides a new choice for the material and structure design of the flexible ultra-thin plate heat pipe shell. The gas-liquid coplanar type mesh is used as the capillary wick to reduce the flow resistance of steam inside the heat pipe, and the wick is hydrophilically modified to improve its capillary pumping performance; a sandwich support structure is used to prevent the steam chamber from collapsing. The thermal performance of the three liquid filling ratios of 0.3, 0.4 and 0.5 was tested at different tilt angles and bending angles. The results show that: in the cases of filling ratios of 0.3, 0.4 and 0.5, the ultra-thin flexible flat plate heat pipe with the liquid filling ratio of 0.3 has the best heat transfer performance under different working conditions; the tilt angle has different effects on the heat transfer performance and starting speed of the ultra-thin flexible flat plate heat pipe with different filling ratios, and the bending angle changes the steam condensation position inside the ultra-thin flexible flat plate heat pipe and increases the thermal resistance.","PeriodicalId":50408,"journal":{"name":"Heat Transfer Research","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139551694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Passive thermal management of photovoltaic modules using latent heat storage system with metallic mesh layers and multi-metal spinel oxide nanoparticles 利用带有金属网层和多金属尖晶石氧化物纳米颗粒的潜热储存系统对光伏组件进行无源热管理

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2023-12-01 DOI: 10.1615/heattransres.2023051462

Emine Yağız Gürbüz, Haytem Moussaoui, Barış Kusun, Azim Dogus Tuncer

{"title":"Passive thermal management of photovoltaic modules using latent heat storage system with metallic mesh layers and multi-metal spinel oxide nanoparticles","authors":"Emine Yağız Gürbüz, Haytem Moussaoui, Barış Kusun, Azim Dogus Tuncer","doi":"10.1615/heattransres.2023051462","DOIUrl":"https://doi.org/10.1615/heattransres.2023051462","url":null,"abstract":"Passive thermal management of photovoltaic (PV) panels is an effective and low-cost method for reducing the surface temperature and improving the power output of these systems. In the current study, it is aimed to upgrade the efficiency of a PV system using a latent heat storage system with metallic mesh layers and multi-metal spinel oxide nanoparticles. The experimental part of this work contains two stages. In the first stage, three PV systems including an unmodified PV, LHSS (only paraffin)-integrated PV system and a LHSS-integrated PV system that modified with metallic mesh layers. As a result of the initial test, the PV system with mesh layers added LHSS gave the best performance results. In the second experiment, the mesh integrated LHSS of the PV system has been modified with MgOAl2O3 nanoparticles for enhanced thermal conductivity and compared with the PV system with mesh layer integrated LHSS containing only paraffin. According to the experimental results of this work, applying different types of LHSS configurations significantly reduced the surface temperature of the PV panel. The overall outcomes of the present work showed that using a LHSS with MgOAl2O3 nanoparticles-doped paraffin and metallic mesh layers upgraded the normalized power output efficiency and performance ratio of the unmodified system as 17.43% and 15.72%, respectively.","PeriodicalId":50408,"journal":{"name":"Heat Transfer Research","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138744817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving Thermal and Electricity Generation Performance of Photovoltaic/Thermal (PV/T) Systems Using Hybrid Nanofluid 利用混合纳米流体改善光伏/热(PV/T)系统的热发电性能

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2023-12-01 DOI: 10.1615/heattransres.2023049992

ADNAN SOZEN, Ettahir El Hadi O. Swese, Aybaba HANÇERLİOĞULLARI, İpek Aytaç, Halil İbrahim Variyenli, Mutlu Tarık Çakır, Rezvan REZAEIZADEH

{"title":"Improving Thermal and Electricity Generation Performance of Photovoltaic/Thermal (PV/T) Systems Using Hybrid Nanofluid","authors":"ADNAN SOZEN, Ettahir El Hadi O. Swese, Aybaba HANÇERLİOĞULLARI, İpek Aytaç, Halil İbrahim Variyenli, Mutlu Tarık Çakır, Rezvan REZAEIZADEH","doi":"10.1615/heattransres.2023049992","DOIUrl":"https://doi.org/10.1615/heattransres.2023049992","url":null,"abstract":"Solar energy is a safe and clean source of energy, available on earth throughout the year. A PV/T system is a device designed to take solar energy and convert it into electrical/thermal energy. Photovoltaic/Thermal (PV/T) systems can also be useful to produce hot fluid (usually water) along with the generation of electrical energy. In addition, the electric generating performance of PVs increases with heat discharging ability of thermal system, which also prevent overheating in PV systems. Nanofluid is a new generation heat transfer fluid that deliver higher thermal conductivity and heat transfer rate compared to conventional fluids. The thermal conductivity of the nanofluid depends on the size of the nanoparticles, concentration of the nanofluid, and the method of its preparation. In this study, it is aimed to increase the thermal heat transfer of the PV/T system by using hybrid nanofluids, manufactured by adding 0.5% Fe2O3 and Fe3O4 nanoparticles to the water as a working fluid. By using hybrid nanofluids, increase in bidirectional performance along with enhanced cooling is achieved. In the experimental study, more heat was withdrawn from the heated PV panels by utilizing the high thermal conductivity of the hybrid nanofluid, and the best improvement in total efficiency was obtained as 86% for the hybrid nanofluid. With the use of hybrid nanofluids in the cooling circuit, the electrical and thermal efficiency of the PV panel has reached to overall 81% on average basis.","PeriodicalId":50408,"journal":{"name":"Heat Transfer Research","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138536155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance and structure optimization of torsional flow heat exchanger with orthogonal drop-shaped tube 正交滴型管扭转流换热器性能及结构优化

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2023-12-01 DOI: 10.1615/heattransres.2023051028

Xin Gu, Yiwen Zhu, Xin Liu, Hao Sun, yongqing wang

{"title":"Performance and structure optimization of torsional flow heat exchanger with orthogonal drop-shaped tube","authors":"Xin Gu, Yiwen Zhu, Xin Liu, Hao Sun, yongqing wang","doi":"10.1615/heattransres.2023051028","DOIUrl":"https://doi.org/10.1615/heattransres.2023051028","url":null,"abstract":"As a novel variation of shell-and-tube heat exchanger, torsional flow heat exchanger has a promising application prospect, while drop-shaped tube can enhance fluid flow velocity, distribution, and overall heat transfer performance. A torsional flow heat exchanger with orthogonal drop-shaped tubes in the shell side is presented to obtain the benefits of both designs. Three numerical models about torsional flow heat exchangers are established, having the same structure but different in the axial ratio of the heat transfer tubes. The characteristics of fluid flow and heat transfer in the shell side of heat exchangers are analyzed numerically. Response surface method is utilized to optimize the shell-side structure. The results show that compared with the torsional flow heat exchanger with common round tubes, torsional flow heat exchangers with orthogonal drop-shaped tubes of three axial ratios at the Reynolds number range from 5000 to 13000, pressure drop reduces by 9.26%-14.49%, heat transfer coefficient increases by 0.65%-11.57%, and comprehensive performance improves by 14.18%-27.23%. The optimum structure of the torsional flow heat exchanger with orthogonal drop-shaped tubes is predicted by using Minitab and compared to the initial structure, resulting in 17.19% improvement in heat transfer coefficient and 18.63% improvement in comprehensive performance. The study provides a reference for the structural exploration and improvement of torsional flow heat exchangers with enhanced tubes.","PeriodicalId":50408,"journal":{"name":"Heat Transfer Research","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138536156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NATURAL CONVECTION OF NON NEWTONIAN DILATANT FLUID IN THE GAP BETWEEN AN OUTER CYLINDER AND INNER CYLINDER WITH GROOVES 非牛顿流体在带凹槽的外圆柱体和内圆柱体间隙中的自然对流

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2023-12-01 DOI: 10.1615/heattransres.2023050322

Oussama Benhizia, Mohamed Bouzit

引用次数: 0

STUDY OF FORCED ACOUSTIC OSCILLATIONS INFLUENCE ON METHANE OXIDATION PROCESS IN OXYGEN-CONTAINING FLOW OF HYDROGEN COMBUSTION PRODUCTS 研究强迫声波振荡对含氢燃烧产物氧流中甲烷氧化过程的影响

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2023-12-01 DOI: 10.1615/heattransres.2023051433

Anastasiya Krikunova, Konstantin Arefyev, Ilya Grishin, Maxim Abramov, Vladislav Ligostaev, Evgeniy Slivinskii, Vitaliy Krivets

{"title":"STUDY OF FORCED ACOUSTIC OSCILLATIONS INFLUENCE ON METHANE OXIDATION PROCESS IN OXYGEN-CONTAINING FLOW OF HYDROGEN COMBUSTION PRODUCTS","authors":"Anastasiya Krikunova, Konstantin Arefyev, Ilya Grishin, Maxim Abramov, Vladislav Ligostaev, Evgeniy Slivinskii, Vitaliy Krivets","doi":"10.1615/heattransres.2023051433","DOIUrl":"https://doi.org/10.1615/heattransres.2023051433","url":null,"abstract":"The article presents the results of a computational and experimental study of the acoustic intensification of methane oxidation processes in high-enthalpy oxygen-containing flow of hydrogen combustion products. The studies were conducted by using tube with constant cross-section and finite length. Initial specific enthalpy of the oxygen-containing flow is varied from 1600 kJ/kg to 2400 kJ/kg. The patterns of total enthalpy influence of the oxygen-containing flow of hydrogen combustion products and acoustic effect on the efficiency (completeness of chemical reactions) of methane oxidation were obtained. The dependence of acoustic frequency influence on completeness coefficient of physics-chemical processes has been found. The values of fuel equivalence ratio were determined for various total enthalpies of the oxygen-containing flow, corresponding to diffusion and kinetic regimes of methane oxidation. Stability of methane oxidation process and influence of forced acoustic oscillations on the spectral characteristics of static pressure pulsations in the flow were analyzed.","PeriodicalId":50408,"journal":{"name":"Heat Transfer Research","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138580809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation on thermal performance of ultra-thin flattened heat pipe with middle heating for electronics cooling 用于电子设备冷却的中间加热超薄扁平热管热性能实验研究

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2023-12-01 DOI: 10.1615/heattransres.2023051581

Tengqing Liu, Xuehao He, Yaokang Zhang, Shuangfeng Wang

引用次数: 0

Parametric CFD study of Solar Air Heater having alternated upper and bottom absorber plates in turbulent flow 紊流条件下上下板交替吸收体太阳能空气加热器的参数CFD研究

IF 1.7 4区工程技术

Heat Transfer Research Pub Date : 2023-11-01 DOI: 10.1615/heattransres.2023049434

Djemel Hassene, Benmabrouk Amine, Hammami Moez, Baccar Mounir

{"title":"Parametric CFD study of Solar Air Heater having alternated upper and bottom absorber plates in turbulent flow","authors":"Djemel Hassene, Benmabrouk Amine, Hammami Moez, Baccar Mounir","doi":"10.1615/heattransres.2023049434","DOIUrl":"https://doi.org/10.1615/heattransres.2023049434","url":null,"abstract":"This work presents a CFD investigation of a Solar Air Heater that features alternating upper and bottom absorber plates to evaluate its thermal behavior and turbulent flow characteristics. Generally, the SAH exhibits low heat transfer characteristics and poor thermal efficiency in turbulent flow. The use of alternating upper and bottom absorber plates facing the turbulent flow would improve heat transfer by producing recirculation zones mainly over these heated plates. The Computational Fluid Dynamics software program, Ansys Fluent 15.0, along with the RNG k-ε turbulence model, was utilized in this analysis to solve the transport equations for turbulent kinetic energy and dissipation rate. The analysis encompassed several geometric and operating parameters, including the range of relative absorber plate length (lp/h) from 4.375 to 140, relative absorber plate height (h/H) ranging from 0.03 to 0.12, and Reynolds numbers varying between 3800 and 18000. The impact of these parameters on heat transfer improvement factors, including the Heat Transfer Amelioration Factor (HTAR), Friction Loss Amelioration Factor (FLAR), and Thermo-Hydraulic Efficiency Factor (THEF), was studied. The optimum computed THEF value was found to be 2.18 for (Lp/h) = 4.375, (h/H) = 0.12, and Re = 3,800","PeriodicalId":50408,"journal":{"name":"Heat Transfer Research","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138543356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0