Journal of Thermal Analysis and Calorimetry最新文献

Phase diagram, thermal, structural and optical studies of newly synthesized co-crystals 新合成的共晶的相图、热、结构和光学研究

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-04-07 DOI: 10.1007/s10973-026-15410-w

Sumit Chaudhary, Rama Nand Rai

{"title":"Phase diagram, thermal, structural and optical studies of newly synthesized co-crystals","authors":"Sumit Chaudhary, Rama Nand Rai","doi":"10.1007/s10973-026-15410-w","DOIUrl":"10.1007/s10973-026-15410-w","url":null,"abstract":"<div><p>The phase diagram, physicochemical and thermodynamic studies of newly synthesized co-crystals formed by the complexation in two organic pharmaceutical compounds namely nicotinamide (NIC)—3-nitrobenzoic acid (NBA) and sulfanilamide (SUL)—3-hydroxy-4-methoxybenzaldehyde (HMB) are reported. The individual phase diagram forming the co-crystals has been established. A phase diagram is a significant study to find the precise stoichiometric ratio at which the formation of new molecular complex/co-crystal would take place. The solvent-free solid-state synthesis method has been adopted for the synthesis of binary compounds in the entire range of compositions. The two novel co-crystals formed at 2:1 molar ratio in NIC–NBA and 1:1 molar ratio in SUL–HMB system along with two eutectics on either side of the co-crystal. The pure and single-phase behaviour of co-crystals and their melting are studied using the DSC method. The DSC of eutectics formed in both systems is also studied. Using the experimental heat of fusion values, obtained from DSC, various thermodynamic parameters of co-crystals and eutectics have been studied and are being reported first time. Besides the phase diagram and DSC studies, FTIR, PXRD and UV–Vis is absorption and emission studies also confirm the formation of co-crystals and change in their structures in comparison with that of the parent components.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 5","pages":"3811 - 3822"},"PeriodicalIF":3.1,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808256","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}

引用次数: 0

Eggshell-derived calcium oxide nanocatalyst for the production of bio-lubricant from Mahua (Madhuca Indica) oil 蛋壳源氧化钙纳米催化剂用于麻花油生物润滑剂的制备

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-04-03 DOI: 10.1007/s10973-026-15438-y

Anjani R. K. Gollakota, Amit Kumar Rajak, Prakash Kumar Sarangi, Munagapati Venkata Subbaiah, Chi-Min Shu, Yang Xiao, Jet-Chau Wen

{"title":"Eggshell-derived calcium oxide nanocatalyst for the production of bio-lubricant from Mahua (Madhuca Indica) oil","authors":"Anjani R. K. Gollakota, Amit Kumar Rajak, Prakash Kumar Sarangi, Munagapati Venkata Subbaiah, Chi-Min Shu, Yang Xiao, Jet-Chau Wen","doi":"10.1007/s10973-026-15438-y","DOIUrl":"10.1007/s10973-026-15438-y","url":null,"abstract":"<div><p>The present study explores the potential of non-edible Mahua oil <i>(Madhuca indica)</i> as a sustainable feedstock for producing bio-lubricants within a green refinery framework. Bio-lubricants were synthesized via a two-step process comprising transesterification of Mahua oil with methanol to yield fatty acid methyl esters (FAMEs), followed by esterification with neopentyl glycol (NPG) in the presence of calcium oxide (CaO) nanocatalyst derived from waste eggshells. The resulting bio-lubricants exhibited superior thermal stability and enhanced tribological properties while adhering to green chemistry and circular economy principles, thereby reducing dependence on synthetic additives. Further, the study evaluated the impact of key operational parameters, such as temperature, catalyst loading, reaction time, and the molar ratio of FAME to NPG on the efficiency of bio-lubricant production. The results, indicating 2.5% w/w catalyst dosage, 1:7 FAME: NPG molar ratio, and a reaction temperature of 180 °C for 5h under vacuum, resulted in a maximum yield of 89.15%. This approach offered a sustainable, efficient route to high-performance bio-lubricants derived from renewable plant oils and waste-based catalysts, advancing environmentally responsible industrial practices.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 6","pages":"4625 - 4649"},"PeriodicalIF":3.1,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727339","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}

引用次数: 0

Heat capacities of selected battery materials and components 所选电池材料和部件的热容

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-03-29 DOI: 10.1007/s10973-026-15452-0

Mahmoud Reda, Hans Flandorfer

{"title":"Heat capacities of selected battery materials and components","authors":"Mahmoud Reda, Hans Flandorfer","doi":"10.1007/s10973-026-15452-0","DOIUrl":"10.1007/s10973-026-15452-0","url":null,"abstract":"<div><p>The specific heat capacities of solid battery materials like active electrode materials and separators were measured from approx. 300–550 K in this study. First, the method was validated by measuring the heat capacities of active anode materials silicon and tin disulfide, which could then be compared to data from literature. The second set of measurements were done on two separator materials (Celgard 2500 and Whatman GF/C), and the results were compared to the heat capacity measurements of pure polypropylene and borosilicate glass from literature. The C<sub>p</sub> of Celgard 2500 was between of 1.79 and 2.16 J.g<sup>−1</sup>K<sup>−1</sup> and the Cp of Whatman GF/C was between 0.83 and 0.96 J.g<sup>−1</sup>K<sup>−1</sup>. In addition, heat capacity values of both types of LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> (LNMO), disordered LNMO (DLNMO) and ordered LNMO (OLNMO), are reported for the first time, ranging between 0.72–0.90 J.g<sup>−1</sup>K<sup>−1</sup> and 0.73–0.86 J.g<sup>−1</sup>K<sup>−1</sup> for DLNMO and OLNMO, respectively. Compared to each other, both DLNMO and OLNMO have similar heat capacities at lower temperatures. However, with increasing temperature, DLNMO starts to have higher heat capacities. Both heat capacities were compared to a heat capacity calculation according to Neumann–Kopp based on the heat capacities of the binary oxides. When compared to the “Parent” material LiMn<sub>2</sub>O<sub>4</sub> (LMO), both DLNMO and OLNMO had lower heat capacities. The data are highly relevant for battery thermal management and for thermal modeling and simulation of lithium-ion batteries.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"6397 - 6407"},"PeriodicalIF":3.1,"publicationDate":"2026-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10973-026-15452-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727410","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}

引用次数: 0

Developing turbulent flow of fuel salt in circular tubes with inward wall heat flux 燃料盐在具有内壁热流的圆管内湍流流动的研究

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-03-28 DOI: 10.1007/s10973-026-15448-w

Yang Yang, Yang Zou

{"title":"Developing turbulent flow of fuel salt in circular tubes with inward wall heat flux","authors":"Yang Yang, Yang Zou","doi":"10.1007/s10973-026-15448-w","DOIUrl":"10.1007/s10973-026-15448-w","url":null,"abstract":"<div><p>Since 2000, amid growing concerns over energy conservation and emission reduction, liquid-fueled molten salt reactors (LF-MSR) have regained considerable attention. However, there is still a lack of applicable correlations for the developing turbulent flow and heat transfer of molten salt under the coupled effects of internal heat generation and inward wall heat flux. To address this gap, numerical simulations are performed using ANSYS Fluent with the Reynolds Stress-BSL turbulence model to systematically investigate the thermal–hydraulic performance and entropy generation characteristics. Parametric analysis reveals that the friction factor decreases with increasing wall heat flux, Reynolds number, and inlet temperature and with decreasing tube diameter, while the standalone effect of internal heat generation rate is negligible. The equivalent Nusselt number increases with increasing internal heat generation rate, Reynolds number, inlet temperature, and tube diameter and decreasing wall heat flux; the performance index shows the same trend while decreasing with increasing tube diameter. The heat transfer irreversibility dominates the total irreversibility; it increases with internal heat generation rate, wall heat flux, and tube diameter, but decreases with Reynolds number and inlet temperature. The exergy efficiency, which depends on the wall heat flux, decreases with increasing wall heat flux. Finally, new correlations for the equivalent Nusselt number and friction factor are proposed, with a maximum relative deviation of 14.8% from experimental data for the Nusselt number correlation and 8.7% from numerical data for the friction factor correlation, respectively. The present findings can be directly applied to the preliminary design of liquid-fueled molten salt reactors.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"6053 - 6077"},"PeriodicalIF":3.1,"publicationDate":"2026-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727405","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}

引用次数: 0

Influence of pressure gradient and buoyancy on viscous dissipation and Joule heating in Carreau nanofluid flow 压力梯度和浮力对卡罗纳米流体黏性耗散和焦耳加热的影响

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-03-26 DOI: 10.1007/s10973-025-15229-x

M. A. M. Sharaf, M. M. El Shafee, Mohamed Montaser, Ahmed Saleh

{"title":"Influence of pressure gradient and buoyancy on viscous dissipation and Joule heating in Carreau nanofluid flow","authors":"M. A. M. Sharaf, M. M. El Shafee, Mohamed Montaser, Ahmed Saleh","doi":"10.1007/s10973-025-15229-x","DOIUrl":"10.1007/s10973-025-15229-x","url":null,"abstract":"<div><p>Efficient control of heat and mass transport in non-Newtonian nanofluids plays a vital role in several engineering fields, including polymer extrusion, thermal regulation of electronic components, and waste-energy recovery. Although numerous investigations have been reported, many of them address only one or two effects separately, which limits a full understanding of the combined physical mechanisms involved. In the present work, we analyze the time-dependent, axisymmetric motion of a Carreau-type nanofluid past a porous disk that stretches radially. The formulation incorporates the influence of pressure gradients, buoyancy, magnetic effects, viscous dissipation, Joule heating, and radiative heat flux. Porosity and inertial resistance are represented through the Darcy–Forchheimer approach. After applying suitable similarity transformations, the resulting nonlinear ordinary differential equations are solved numerically using a Runge–Kutta-based shooting algorithm. The numerical results indicate that stronger magnetic intensity reduces the fluid velocity but increases the surface friction coefficient. Periodic pressure gradients significantly affect both velocity and temperature fields, while the combined action of viscous dissipation and thermal radiation thickens the thermal boundary layer. Comparisons with previously published data show excellent agreement, confirming the accuracy of the proposed formulation. This investigation unifies several thermal–physical effects that were previously treated separately and thus provides an extended theoretical basis for Carreau nanofluid transport, with direct implications for industrial systems where simultaneous control of flow and heat transfer is essential.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"5815 - 5834"},"PeriodicalIF":3.1,"publicationDate":"2026-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10973-025-15229-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727439","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}

引用次数: 0

Special Chapter on the 4th International Symposium on Urban and Industrial Safety (ISUIS 2024) 第四届城市与工业安全国际研讨会（ISUIS 2024）专章

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-03-26 DOI: 10.1007/s10973-026-15422-6

Chi-Min Shu

引用次数: 0

Optimization of aspect ratio for enhanced thermal and exergy efficiency in conical solar distillers: a thermodynamic and AI-driven study for sustainable freshwater production 优化长宽比以提高锥形太阳能蒸馏器的热效率和火用效率：可持续淡水生产的热力学和人工智能驱动研究

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-03-25 DOI: 10.1007/s10973-026-15372-z

M. A. Elazab, Mohamed Kamel Elshaarawy, H. A. Dahab

{"title":"Optimization of aspect ratio for enhanced thermal and exergy efficiency in conical solar distillers: a thermodynamic and AI-driven study for sustainable freshwater production","authors":"M. A. Elazab, Mohamed Kamel Elshaarawy, H. A. Dahab","doi":"10.1007/s10973-026-15372-z","DOIUrl":"10.1007/s10973-026-15372-z","url":null,"abstract":"<div><p>This study explores the impact of aspect ratio (AR) optimization on the thermal performance of conical solar stills to enhance freshwater production. Recognizing that conical geometry significantly influences solar absorption and evaporation efficiency, the research aims to identify the optimal AR that maximizes energy utilization and water yield under seasonal environmental conditions. A comprehensive thermodynamic model, based on energy and exergy balances, is developed to evaluate the effects of varying AR and conical angles on system performance. Numerical simulations reveal that increasing AR improves solar absorption, thermal gradients, and evaporation rates, with an optimal AR near 3.0 resulting in up to 140% enhancement in energy efficiency, 175% in exergy efficiency, and a 137% increase in the gained output ratio (GOR) compared to winter baselines. To support the identification of this optimum, artificial intelligence (AI) tools, viz. genetic algorithms (GA), particle swarm optimization (PSO), and artificial neural networks (ANNs), are employed as secondary aids to efficiently map nonlinear thermal behavior and confirm the best-performing configurations. The results underscore the critical role of geometric design, particularly AR, in driving the efficiency of passive solar desalination systems and offer a validated, data-supported pathway for scalable, sustainable freshwater generation.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"6079 - 6101"},"PeriodicalIF":3.1,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10973-026-15372-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727459","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}

引用次数: 0

Experimental analysis of thermal energy exchange performance in gravitational water vortex systems 重力水涡系统热能交换性能的实验分析

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-03-24 DOI: 10.1007/s10973-026-15348-z

Hafiz Muhammad Rizwan, Taqi Ahmad Cheema, M. Mohib Ur Rehman, Cheol Woo Park

{"title":"Experimental analysis of thermal energy exchange performance in gravitational water vortex systems","authors":"Hafiz Muhammad Rizwan, Taqi Ahmad Cheema, M. Mohib Ur Rehman, Cheol Woo Park","doi":"10.1007/s10973-026-15348-z","DOIUrl":"10.1007/s10973-026-15348-z","url":null,"abstract":"<div><p>Thermal performance of heat exchangers is essential in a wide range of industrial applications, demanding continuous advancements in thermal energy exchange systems. The proposed novel configuration of gravitational water vortex heat exchangers (GWVHEs) could be an appealing option for effective thermal energy exchange in industrial heat exchange operations. Moreover, the suggested configuration of GWVHE may operate with less energy input due to the use of gravity to facilitate flow. Therefore, the current study examines the mechanism of thermal energy exchange in a newly designed and developed configuration of GWVHE. The experimental study includes measuring the rates at which heat is exchanged between the hot and cold fluids to examine the thermal energy balance between two fluids, as well as the temperature distributions of the two fluids. The experimental results for the thermal energy exchange process validate the thermal energy balance for both fluids streams with thermal losses in the range of 10.5–8.5% for the two sets of investigating parameters. Moreover, the temperature distributions found for the thermal energy gained by cold fluid inside the basin from baffled shell and rectangular spiral confirms the efficient heat exchange process. In addition, the Nusselt number correlations obtained using the Wilson plot approach can be used to predict heat transfer coefficients. The experimental results are effectively predicted by the developed Nusselt number correlation within a maximum of ± 20% deviation and with an average deviation of 1.9% and 5.1% for both sets of investigating parameters, respectively. The results validate the suggested GWVHE configuration's effective thermal energy exchange capability, setting a new industry benchmark for heat exchangers.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"5667 - 5685"},"PeriodicalIF":3.1,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727275","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}

引用次数: 0

Performance evaluation of a vertical-axis rotary silica gel dehumidifier for energy-efficient and sustainable HVAC applications 垂直轴旋转硅胶除湿机节能和可持续暖通空调应用的性能评估

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-03-24 DOI: 10.1007/s10973-026-15433-3

Sampath Suranjan Salins, H. K. Sachidananda, Mohamed Shoaib, Cian Sanjay Machado, Tharun guruvaredduyur Karthikeyan, Mohammed Milan, Shiva Kumar

{"title":"Performance evaluation of a vertical-axis rotary silica gel dehumidifier for energy-efficient and sustainable HVAC applications","authors":"Sampath Suranjan Salins, H. K. Sachidananda, Mohamed Shoaib, Cian Sanjay Machado, Tharun guruvaredduyur Karthikeyan, Mohammed Milan, Shiva Kumar","doi":"10.1007/s10973-026-15433-3","DOIUrl":"10.1007/s10973-026-15433-3","url":null,"abstract":"<div><p>This study focuses on the design and construction of a vertical-axis rotary dehumidifier test rig, which utilizes silica gel as the desiccant to remove moisture from the air. Regeneration of the desiccant is facilitated by a heater and a dedicated blower that generates suction to remove moisture adsorbed onto the solid desiccant. The tests were conducted by varying the motor speed from 40 to 100 rpm and adjusting the air Reynolds number between 13,682.43 and 45,608.1. The results demonstrated a maximum change in temperature of 4.2 °C, a specific humidity change of 3 gkg<sup>−1</sup>, a moisture removal rate (MRR) of 0.090 gs<sup>−1</sup>, dehumidification efficiency of 0.91, and a mass transfer coefficient (MTC) of 74.54 kgm<sup>−2</sup> s<sup>−1</sup>. Experimental findings indicated that the dynamic humidifier outperformed the static humidifier in terms of performance. Air quality tests revealed that pollution levels increased with motor speed and air velocity; however, pollutants such as carbon dioxide, total volatile organic compounds, and formaldehyde remained within acceptable limits. It was observed that the velocity of air entering the dehumidifier decreases with increased motor speed. Additionally, the change in air velocity and the change in specific humidity were found to be inversely proportional to each other.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"5871 - 5887"},"PeriodicalIF":3.1,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10973-026-15433-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727327","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}

引用次数: 0

Floating and sloped solar chimney systems: a comprehensive review of concepts, performance, and future prospects 浮动和倾斜太阳能烟囱系统：概念，性能和未来前景的全面审查

IF 3.1 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2026-03-23 DOI: 10.1007/s10973-026-15455-x

Omer K. Ahmed

{"title":"Floating and sloped solar chimney systems: a comprehensive review of concepts, performance, and future prospects","authors":"Omer K. Ahmed","doi":"10.1007/s10973-026-15455-x","DOIUrl":"10.1007/s10973-026-15455-x","url":null,"abstract":"<div><p>The increasing global demand for clean energy, coupled with the challenges posed by high construction costs and the low overall efficiency of conventional solar chimneys (typically only 1–2%), has created a need for more efficient, cost-effective engineering solutions. This study systematically reviews the floating solar chimney (FSC) and inclined solar chimney (SSC) systems as advanced alternatives that leverage thermal buoyancy to increase power output. Quantitative results from previous studies indicate that FSC systems can achieve a 15–30% improvement in thermal efficiency by increasing the effective height to 1–2.5 km, while reducing construction costs by up to 80–90% compared to concrete chimneys. SSC systems with optimal inclination angles (20°–35°) have demonstrated a 10–35% performance increase and a 20–30% increase in air velocity, while minimizing the need for a tall vertical chimney.</p><p>Analysis of the second law of thermodynamics also showed that the exothermic efficiency of the inclined system can reach approximately 80% under optimal conditions. Despite these advantages, challenges remain regarding structural stability, air losses, and long-term material durability. The scientific novelty of this study lies in providing the first comprehensive quantitative comparison between the two systems in terms of thermal performance and economic viability, thus offering a clear analytical framework to support the application of these technologies in areas with high solar irradiance, particularly in desert and mountainous environments.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"151 7","pages":"5481 - 5500"},"PeriodicalIF":3.1,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147727570","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}

引用次数: 0