Journal of Thermal Analysis and Calorimetry最新文献

{"title":"Solidification effect of MXene nano-enhanced phase change material on 2E’s analysis of latent heat thermal energy storage","authors":"Utkarsh Srivastava,&nbsp;Rashmi Rekha Sahoo","doi":"10.1007/s10973-024-13936-5","DOIUrl":"10.1007/s10973-024-13936-5","url":null,"abstract":"<div><p>In the present study, systems efficiency, heat transfer rate, exergy destruction, entropy generation number, exergetic efficiency, liquid fraction, and solidification temperature contours are determined for double-tube thermal energy storage (DT-TES) and triple-tube thermal energy storage (TT-TES) systems using MXene-based nano-enhanced phase changes material (NEPCM). The findings showed that the DT-TES using pure beeswax PCM in pure solidification has a discharge exergy 14.76% lower than that of MXene-based NEPCM. Using the TT-TES system, pure PCM and MXene NEPCM produced 2.47% and 3.62% less entropy at 2400 s than pure beeswax. Over 2400 s, DT-TES using pure beeswax discharged more effectively. Because of the superior thermophysical characteristics of MXene nanoparticles, the TT-TES system solidified beeswax PCM 18.53% faster than pure PCM. Consequently, under TT-TES latent heat, MXene-based nano-enhanced beeswax PCM solidifies more quickly per volume.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 1","pages":"107 - 121"},"PeriodicalIF":3.0,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and properties of DAP-4@LLM-105 micro-nano core–shell structures","authors":"Yang Liu,&nbsp;Huinan Wang,&nbsp;Tiancheng Lv,&nbsp;Lishuang Hu,&nbsp;Kaili Liang,&nbsp;Yan Li,&nbsp;Jianren Zhang,&nbsp;Yuheng Wu,&nbsp;Shuangqi Hu","doi":"10.1007/s10973-024-13923-w","DOIUrl":"10.1007/s10973-024-13923-w","url":null,"abstract":"<div><p>The fluororubber F2314 served as the binder; while, nano-LLM-105 acted as the insensitive agent. The DAP-4@LLM-105 energetic composites were prepared by coating with different contents of nanoscale LLM-105 using the solvent evaporation method to improve the safety performance of DAP-4. The morphologies, structures, and thermal properties of the DAP-4@LLM-105 energetic composites were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and differential scanning calorimetry (DSC), respectively. Additionally, the sensitivities were tested and analyzed. The combustion performance was also evaluated. The results show that the crystal structures of DAP-4 remain unchanged. When the content of LLM-105 is 20% by mass, the surface of DAP-4 can be uniformly and densely coated. Nanoscale LLM-105 could promote the thermal decomposition of DAP-4. The amount of nano-LLM-105 significantly influences the impact sensitivity and electrostatic sensitivity of DAP-4. As the content of nano-LLM-105 increases, the sensitivity of the DAP-4@LLM-105 micro-nano core–shell structures progressively decreases. Furthermore, the combustion time of the micro-nano core–shell structure is extended.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 1","pages":"87 - 95"},"PeriodicalIF":3.0,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of the tensile modulus of polyethylene based on single calorimetric curves","authors":"Ali Zarbali,&nbsp;Younsi Yosser,&nbsp;Alfréd Menyhárd","doi":"10.1007/s10973-024-13759-4","DOIUrl":"10.1007/s10973-024-13759-4","url":null,"abstract":"<div><p>This study focuses on the prediction of the tensile modulus of polyethylene based on a previously developed empirical model. Just as in earlier works, the stiffness is estimated from the data evaluated from single calorimetric curves. During the work, three types of polyethylene (LDPE, MDPE and HDPE) were used. Calorimetry was employed to measure the degree of crystallinity and melting characteristics of the polymers investigated in this study, while the mechanical properties were evaluated through tensile tests conducted on standard-shaped specimens. The specimens intended for the tests were produced by injection molding and later annealed at various temperatures. The stiffness of the perfectly crystalline polymer was determined based on the propagation velocity of longitudinal sound waves in the material. The predicted and experimentally determined modulus values demonstrated a reasonably good agreement. These results verify the effectiveness of our prediction method in accurately estimating the tensile modulus of PE.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 1","pages":"167 - 173"},"PeriodicalIF":3.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10973-024-13759-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermally simulated double diffusion flow for Prandtl nanofluid through Levenberg–Marquardt scheme with artificial neural networks with chemical reaction and heat transfer","authors":"Noreen Sher Akbar,&nbsp;Tayyab Zamir,&nbsp;A. Alzubaidi,&nbsp;S. Saleem","doi":"10.1007/s10973-024-13831-z","DOIUrl":"10.1007/s10973-024-13831-z","url":null,"abstract":"<div><p>The study explores the use of neural networks to analyze the behavior of Prandtl nanofluid near an extending surface, considering crude oil as the base fluid and copper nanoparticles. It examines the combined effects of thermal and concentration gradients on fluid flow and heat transfer characteristics through advanced computational techniques. The research focuses on double diffusion in the flow of Prandtl nanofluid near a stretching surface (DD-PNSS), utilizing the Levenberg–Marquardt scheme with artificial neural networks (LMS-ANNs). By applying similarity variables, the nonlinear partial differential equations are transformed into nonlinear ordinary differential equations. Through the application of the Lobatto IIIa formula in a three-stage process, various data sets are generated for the LMS-ANNs by varying parameters such as the Prandtl fluid parameter (<span>(alpha)</span>), Prandtl number (Pr), Brownian motion parameter (Nb), thermophoresis parameter (Nt), and Dufour-solutal Lewis number (Ld). The proposed LMS-ANNs model is meticulously tested, validated, and trained using a multi-stage approach, and its performance is compared to established references to ensure its reliability. The effectiveness of the suggested LMS-ANNs model is further affirmed through regression analysis, Mean Squared Error (MSE) evaluation, and histogram studies, showcasing an exceptional accuracy level ranging from <span>(1{0}^{-08})</span> to <span>(1{0}^{-10})</span>, setting it apart from alternative approaches and reference models. The study has application in optimizing heat and mass transfer processes. It is useful for catalytic reaction enhancement, energy transfer improvement in nanofluids, and efficient cooling system design. The growth of thermal management systems is supported by the incorporation of AI-driven algorithms, which provide accurate forecasts of heat and chemical transport phenomena under a variety of circumstances.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 1","pages":"627 - 647"},"PeriodicalIF":3.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peristalsis of hybrid nanomaterial in convectively heated asymmetric configuration","authors":"T. Hayat,&nbsp;S. Amjad,&nbsp;Z. Nisar,&nbsp;A. Alsaedi","doi":"10.1007/s10973-024-13790-5","DOIUrl":"10.1007/s10973-024-13790-5","url":null,"abstract":"<div><p>Behavior of progressive fluid motion under various physical circumstances and geometries must be predicted and understood to improve industrial thermal management systems. Furthermore, peristaltic motion of hybrid nanofluids is essential for temperature control, chemical manufacturing, environmental engineering and biological applications. The present research investigates peristaltic transport of hybrid nanoliquid within a nonlinear porous medium. Darcy–Forchheimer law is implemented to describe the nonlinear porous medium properties and convection. Dissipation and heat source/sink have been considered in energy expression. The copper (Cu) and silver (Ag) nanoparticles are taken. Maxwell thermal conductivity relation is used to explore the thermal features of hybrid nanomaterial. Brinkman viscosity model describes the viscous characteristics of mono and hybrid nanomaterials. Convective boundary constraints are imposed. Dimensionless systems for larger wavelength are chosen. System of equations and boundary conditions are numerically solved. Graphs and bar charts are drawn to study the velocity, pressure gradient, temperature and transfer rate.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 1","pages":"175 - 185"},"PeriodicalIF":3.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase transitions of sodium peroxide investigated by DSC","authors":"Shin Kikuchi,&nbsp;Nobuyoshi Koga","doi":"10.1007/s10973-024-13886-y","DOIUrl":"10.1007/s10973-024-13886-y","url":null,"abstract":"<div><p>To simulate the sodium fire phenomenon that is expected to occur in an accident of sodium-cooled fast reactor, it is necessary to obtain the thermodynamic parameters that describe the structural phase transition and melting of sodium peroxide (Na₂O₂). Nevertheless, the thermodynamic database and existing literature provide only limited information on this topic. The objective of this study was to ascertain the thermodynamic parameters associated with the phase transitions of Na₂O₂ through the use of differential scanning calorimetry (DSC). Due to the high chemical reactivity of Na₂O₂ at elevated temperatures, particular precautions were necessary for the DSC measurement, including the selection of an appropriate crucible material, the preparation of a custom-made crucible with a specialized geometrical configuration, and the meticulous calibration of the recorded temperature and enthalpy change. Furthermore, all experimental procedures for the DSC measurement were required to be conducted under controlled atmospheric conditions of inert gas. Despite the aforementioned difficulties, we were able to successfully determine the transition temperatures and enthalpy changes associated with the structural phase transition and melting of Na₂O₂ using DSC. The reliability of these thermodynamic parameters was validated by comparing them with previously reported values.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 1","pages":"585 - 590"},"PeriodicalIF":3.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensitivity analysis of thermal optimisation within conical gap between the cone and the surface of disk with particle deposition","authors":"S. Manjunatha,&nbsp;B. Ammani Kuttan,&nbsp;T. N. Tanuja","doi":"10.1007/s10973-024-13866-2","DOIUrl":"10.1007/s10973-024-13866-2","url":null,"abstract":"<div><p>This work examines the thermal and flow characteristics of <span>(left( {{text{TiO}}_{2} + {text{AgBr}} + {text{GO}}/{text{EG}}} right))</span> trihybrid nanofluid in the conical gap that exists between a disc and a cone. Effect of thermophoresis and particle deposition are examined to perceive the mass dissipation change on the surface. The governing equations of the problem are in the form of partial differential equations which are converted to nonlinear ordinary differential equations by applying proper scaling similarity transformations, and then the resultant equations are approximated numerically by using RKF45 technique. The interesting part of this research is to discuss the impact of various pertinent parameters on three cases namely: (1) rotating cone/disk (2) rotating cone/stationary disk and (3) stationary cone/rotating disk. The flow field, heat and mass transfer rates were analysed using graphical representations. Additionally, sensitivity analysis is performed on derived rate of heat transfer as a response function for input factors for different parameters. From the graph, it is perceived that flow field increases significantly with increase in the values of Reynolds numbers for both cone and disk rotations. Also, it is seen that temperature upsurges significantly for ascendent values of solid volume fraction of nanoparticles. It is also noticed that the sensitivity of the Nusselt number towards <span>(n)</span> is more for all the values of source/sink and for middle level values of <span>(n)</span><i>.</i></p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 1","pages":"361 - 375"},"PeriodicalIF":3.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing safety in rapid hydrogen refueling: a numerical study on cylinder injector parameters and filling strategies","authors":"Xuerui Ma,&nbsp;Joon Yong Yoon","doi":"10.1007/s10973-024-13876-0","DOIUrl":"10.1007/s10973-024-13876-0","url":null,"abstract":"<div><p>During the rapid filling of hydrogen cylinders, the geometric parameters related to the cylinder configuration significantly influence the gas temperature rise and the final filling state. However, the existing literature still needs to sufficiently explore the internal structure of hydrogen cylinder injectors. Therefore, this study aims to address this gap by developing a numerical model for the rapid filling process of a 35 MPa, 74 L cylinder (includes both 2D axisymmetric and 3D models). The investigation focuses on analyzing the impacts of the internal length, diameter, and angle of the injector on the temperature rise and gas distribution within the cylinder. The results indicate that optimizing the injector angle can effectively mitigate the temperature increase, while improper angle configurations may exacerbate the temperature rise. Furthermore, this study introduces a novel time-divided filling strategy designed to control the maximum temperature within the cylinder while minimizing energy consumption. By optimizing both the injector configuration and the filling strategy, this research can enhance the efficiency of the hydrogen filling process, thereby contributing to the advancement of hydrogen energy utilization.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 1","pages":"537 - 550"},"PeriodicalIF":3.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal diffusivity and conductivity of Pr, Eu and Ho zirconates","authors":"Marta Mikuśkiewicz,&nbsp;Grzegorz Moskal,&nbsp;Michał Stopyra,&nbsp;Jerzy Korol","doi":"10.1007/s10973-024-13943-6","DOIUrl":"10.1007/s10973-024-13943-6","url":null,"abstract":"<div><p>The article presents the thermal diffusivity and conductivity value of rare earth elements (Pr, Eu, Ho) zirconates as a function of the temperature. All analysed systems were synthesised using the polymerized-complex method (PCM) with Zr(NO₃)₄ as a precursor. The rare earth cations RE³⁺ were introduced as nitrate compounds. The products of the primary stage of synthesis were calcinated and milled. As a final product, the monophasic pyrochlore zirconates of Eu, Pr and fluorite zirconate of Ho were obtained, confirmed by XRD analysis of phase constituents. The theoretical density and the specific heat were calculated (Neumann–Kopp rule). Based on these data and thermal diffusivity measurement (laser-flash method), the thermal conductivity was calculated for all considered compounds. Obtained data were used to determine the thermal conductivity value in the function of porosity. Based on the approximation procedure, the thermal conductivity of pores-free compounds was calculated. It can be assumed that the presented research revealed the thermal properties of Pr and Ho zirconates, which are very narrowly presented in the literature. It should also be noted that thermal conductivity’s tendency to decrease correlates with the cation size of rare earth elements used in zirconate compounds (except the Pr zirconate). Moreover, the relatively low influence of temperature on thermal conductivity thermal course suggests the strong influence of the phonon scattering mechanism.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 2","pages":"1195 - 1204"},"PeriodicalIF":3.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of MHD Williamson fluid flow over a stretched cylinder with Hall, thermal dynamics, and chemical reactions effects","authors":"Atul Jakhar,&nbsp;Vijay Kumar Sukariya,&nbsp;Suresh Kumar,&nbsp;Anand Kumar,&nbsp; Anurag","doi":"10.1007/s10973-024-13851-9","DOIUrl":"10.1007/s10973-024-13851-9","url":null,"abstract":"<div><p>A comprehensive analysis is conducted on the magnetohydrodynamic (MHD) flow of a non-Newtonian Williamson fluid around a stretching cylinder, incorporating Hall current, heat generation, variable thermal conductivity, and convective boundary conditions in the presence of radial magnetic field. This study additionally examines the thermophoretic and Brownian motion characteristics with the selected non-Newtonian model. By employing appropriate physical assumptions, the problem is mathematically formulated as a system of nonlinear partial differential equations. To facilitate the analysis, these equations are further simplified by using the similarity transformations. The resulting equations are subsequently solved numerically utilizing the MATLAB bvp4c solver. The outcomes related to thermal, momentum, and mass transport are presented graphically, highlighting the influence of varying flow parameters. Additionally, key engineering quantities, such as the local skin friction coefficient, local Nusselt number, and Sherwood number, are summarized in a tabular format. The main findings of this study indicate that an increase in the Hall parameter enhances the momentum profiles, whereas the presence of a magnetic field parameter leads to a reduction in these profiles. Further, the thermophoretic parameter significantly enhances the distribution of heat and mass, whereas the Brownian motion parameter exhibits a counteractive effect, resulting in a reduction of mass distribution alongside an elevation in temperature. The skin friction coefficient is surged by <span>(0.43% )</span> and dropped by <span>(11%)</span> by increasing Hall parameter from 0.1 to 0.5 and the magnetic field parameter raised by 0.3 – 0.7, respectively. Also, comparative analysis is conducted between the MATLAB-derived results and previously published data. Moreover, this study has significant implications for heat and mass transfer in Williamson nanofluids, with potential applications in chemical reactors, pollution control, fuel cells, and solar stills.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 1","pages":"673 - 690"},"PeriodicalIF":3.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}