Journal of Thermal Analysis and Calorimetry最新文献

{"title":"Influence of injection/suction and transient pressure gradient on the Brinkman-type dusty magnetized fluid flow through a horizontal microchannel system","authors":"Shabiha Naz,&nbsp;Tamizharasi R","doi":"10.1007/s10973-024-13869-z","DOIUrl":"10.1007/s10973-024-13869-z","url":null,"abstract":"<div><p>The current study explores the behavior of Brinkman-type magnetized dusty-fluid flow in a horizontal penetrable microchannel system for case (i) under transient pressure gradient, which varies inversely with the distance between the channels or is directly proportional to the squeezing ratio of the channels, and case (ii) under uniform injection and suction applied at the lower and upper channel, respectively. The study highlights the versatility and effectiveness of using dusty fluids in microchannel systems with magnetic effects which offer several industrial applications that capitalize on the unique properties of dusty fluids, ultimately enhancing process efficiency and product quality. The governing Darcy–Brinkman equations are transformed into dimensionless form, utilizing the similarity technique. Further, we have established an analytical perturbation approach which enabled us to derive the expressions up to <span>(O(epsilon ^2))</span> with <span>(epsilon )</span> as an amplitude, characterizing the motion of mobile oscillatory upper plate. Furthermore, the effects of chemical reaction, thermal radiation, heat source, magnetic field, the Darcy and the Brinkman parameter, the Schmidt number and the Prandtl number on dusty-fluid flow are discussed graphically using MATLAB ode15s solver. Additionally, the shear stress and the rate of heat and mass transfer are evaluated at both channels. We found that the shear stress is decreased at the lower channel with increase in injection (<span>( delta _{{text{i}}} )</span>) while it is enhanced at the upper channel with increase in suction (<span>( delta _{{text{s}}} )</span>). Also, the velocity profile of both the Brinkman-type fluid and the dust particle rises with increase in pressure gradient and squeezing parameter (<span>(0le alpha le 0.5)</span>). The present work is also validated with existing works for limiting cases and is found to be in good accord.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1801 - 1818"},"PeriodicalIF":3.0,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073748","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":"Optimization of heat transfer characteristics of Casson hybrid nanofluid flow over a porous exponentially elongating surface using RSM approach","authors":"K. Madiha Takreem,&nbsp;B. Venkateswarlu,&nbsp;A. Misra,&nbsp;P. V. Satya Narayana,&nbsp;D. Harish Babu","doi":"10.1007/s10973-024-13840-y","DOIUrl":"10.1007/s10973-024-13840-y","url":null,"abstract":"<div><p>Research on non-Newtonian fluids has received significant attention in recent years due to its wide-ranging applications in a few engineering fields and applied sciences. Casson fluid, a non-Newtonian fluid characterized by a finite yield stress, finds application in biomedical engineering such as the drug delivery systems, tissue engineering processes, medical devices, etc. Motivated by its applications, the current research work extensively examines the flow behavior of a blood-based Casson hybrid nanofluid with silver and gold nanoparticles over an exponentially elongating sheet. Heat transmission in the Casson hybrid nanofluid is driven by convective, joule, and viscous dissipation, with significant influence from the presence of multiple slips, the porous medium, and magnetic forces. A dimensionless form of the governing equations is obtained through the implementation of a similarity approach and are solved numerically by the utilization of bvp4c package in MATLAB. The current research introduces a novel aspect by optimizing the thermal transport rate employing the Response Surface Methodology (RSM) based Box-Behnken Design (BBD). The outcomes elucidate that the phenomena of viscous dissipation and thermal radiation effectively contribute to enhancing the temperature profile, while the presence of a chemical reaction minimizes the concentration profile. The strengthening of the porous medium and the velocity slip substantially boosts the skin friction and the heat transfer rate. Stronger thermal radiation in the absence of velocity slip tends to enlarge the heat transfer rate of Ag-Au/blood. Additionally, Ag-Au/blood achieves an improvement of approximately 3.25–5.73% in thermal transfer rate surpassing Au/blood across a wide range of porosity parameter. Also, the proposed model demonstrates a remarkable precision with an <span>(R^{2})</span> value of 99.73% for the Nusselt number suggesting the exceptional fit of the model.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"2133 - 2149"},"PeriodicalIF":3.0,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074164","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":"Investigation of magnetohydrodynamic flow with tri-hybrid alumina-silica-copper-water nanofluids over a thin needle: impact of Arrhenius activation energy and thermal effects","authors":"Utpal Jyoti Das,&nbsp;Deepjyoti Mali","doi":"10.1007/s10973-024-13853-7","DOIUrl":"10.1007/s10973-024-13853-7","url":null,"abstract":"<div><p>This study investigates a steady magnetohydrodynamic flow involving a tri-hybrid nanofluid composed of aluminum oxide (<span>({text{Al}}_{2} {text{O}}_{3})</span>), silicon dioxide (<span>({text{SiO}}_{2})</span>), and copper (<span>({text{Cu}})</span>) suspended in water. This flow occurs over a slender, thin needle subjected to a heat source or sink. We account for various complex phenomena, including viscous dissipation, Arrhenius activation energy, and the thermo-diffusion and diffusion-thermo effects, which influence thermal and convective mass transfer. To analyze this intricate system, we solve the modified governing equations using the bvp4c numerical tool, which addresses boundary value problems. This study shows that temperature profile grows with the Dufour and Eckert numbers; whereas, the concentration profile grows with the Soret number. Also, it demonstrates that elevating activation energy diminishes concentration profiles while enhancing thermal radiation boosts temperature profiles. As the nanoparticle volume fraction magnifies, fluid velocity declines, accompanied by a rise in temperature. Compared to water, introducing 1% of alumina oxide (<span>({text{Al}}_{2} {text{O}}_{3})</span>), silicon dioxide (<span>({text{SiO}}_{2})</span>), and copper (<span>({text{Cu}})</span>) nanoparticles into the base fluid increases frictional drag by 1.01%, 0.37%, and 1.33%, respectively.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"2151 - 2163"},"PeriodicalIF":3.0,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074163","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":"10E analysis and certain investigation on the performance of high-thermal-conductivity material in PV/T system: an experimental approach","authors":"Gurukarthik Babu Balachandran,&nbsp;Vishnu Karan Baskaran,&nbsp;Abirami Chidambaram,&nbsp;Prince Winston David","doi":"10.1007/s10973-024-13913-y","DOIUrl":"10.1007/s10973-024-13913-y","url":null,"abstract":"<div><p>The efficiency of photovoltaic/thermal (PV/T) systems can be significantly compromised by energy losses. This study investigates the environmental and economic impacts of a novel PV/T system enhanced with high-thermal-conductivity materials (aluminium, copper, and iron) to reduce energy losses and improve overall efficiency. The incorporation of thermal conducting material mitigates these losses by facilitating better heat dissipation and enhancing thermal transfer within the system. The proposed system demonstrates a daily water yield increase from 1.29 to 1.89 L and a remarkable efficiency boost of 47% compared to conventional systems. The capacity utilization factor (CUF) improved from 2.77 to 2.9%, while the cost per unit of power (CPP) decreased from 35.78 to 34.55 years over a 30-year lifespan. The performance ratio was calculated as 2.7511/2.8983 for the conventional and proposed systems, respectively. Enhanced thermal conductivity allows for more effective heating of the working fluid, thereby increasing evaporation rates in the thermal subsystem. These findings highlight the potential of integrating high-thermal-conductivity materials in PV/T systems, showcasing enhanced productivity, reduced costs, and improved energy efficiency, thus contributing to sustainable energy solutions.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1509 - 1532"},"PeriodicalIF":3.0,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074162","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":"Bi-directional tangent hyperbolic MHD hybrid nanofluid flow over an expanding surface with Darcy dissipation connecting to velocity slip and convective boundary condition","authors":"Subhajit Panda,&nbsp;P. K. Pattnaik,&nbsp;S. R. Mishra,&nbsp;Rupa Baithalu","doi":"10.1007/s10973-024-13804-2","DOIUrl":"10.1007/s10973-024-13804-2","url":null,"abstract":"<div><p>The exploration of non-Newtonian fluids poses significant challenges in recent advancements in area of fluid flow phenomena such as tangent hyperbolic nanofluids, which have enhanced energy transportation in various industrial applications. These include cooling systems, biomedical devices, and energy storage. The current work focuses on the magnetohydrodynamic flow of a tangent hyperbolic hybrid nanofluid comprised of magnesium oxide (MgO) and zirconium oxide (ZnO) in the base fluid water over a bi-directional expanding surface. The flow along porous medium urges to introduce the impact of Darcy dissipation in the energy equation, and the implementation of velocity slip and convective boundary constraints energies the study. The formulated mathematical model clubbed with governing partial differential equations that describes the flow properties with specified conditions are transformed by utilizing suitable similarity functions. Further, shooting-based traditional numerical technique generally known as Runge–Kutta fourth-order method. The impact of several characterizing factors involved in the flow phenomena are presented graphically following the validation with earlier studies. In a significant contribution, the results reveal that the existence of magnetism and Darcy dissipation significantly influences the flow and thermal characteristic of the fluid. Thermal radiation acts as an influential factor for the smooth enhancement in the heat transfer, making it crucial in regulating fluid temperature.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"2165 - 2179"},"PeriodicalIF":3.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074199","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":"Investigation of a novel shape-stabilized composite phase change material based on biocarbon","authors":"Shunhua Yao,&nbsp;Jianong Wang,&nbsp;Jiarui Huang,&nbsp;Qili Shi,&nbsp;Cong Zhang,&nbsp;Xinghui Zhang,&nbsp;Weijia Xing","doi":"10.1007/s10973-024-13938-3","DOIUrl":"10.1007/s10973-024-13938-3","url":null,"abstract":"<div><p>In this study, two types of biocarbons, namely CNCC and ACNCC, were developed by carbonization of corn cob (CNCC) and chemical activation of carbonization corn cob (ACNCC). CNCC and ACNCC were used as support materials mixed with composite phase change materials (cPCMs), respectively, by vacuum impregnation, which can not only prevent the leakage of cPCMs but also enhance its thermal conductivity. The measurement results showed that the specific surface area and pore volume of CNCC increased by 9.4 times and 6.4 times, respectively, after being activated. The cPCM was stably adsorbed into the pores of CNCC and ACNCC. The different components of the new shape-stable cPCMs have good chemical compatibility. Differential scanning calorimetry tests showed that the latent heat of two new cPCMs are 201.80 Jg⁻¹ and 214.02 Jg⁻¹, respectively. The thermal conductivity of two new cPCMs is 0.676 Wm⁻¹ K⁻¹ and 0.725 Wm⁻¹ K⁻¹, respectively. Furthermore, the new shape-stable cPCMs present remarkable chemical structural stability and thermal reliability after 150 heating/cooling cycles. This study provides a new type of hybrid PCM which has potential to be widely applied to heating, cooling and power industry, leading to the enhanced energy efficiency and reduced carbon emission globally.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1477 - 1489"},"PeriodicalIF":3.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074198","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":"Influence on the thermophysical properties of organic mixture-based nano-enhanced phase change materials for passive cooling in marine ships","authors":"B. Sabarish,&nbsp;M. Cheralathan","doi":"10.1007/s10973-024-13887-x","DOIUrl":"10.1007/s10973-024-13887-x","url":null,"abstract":"<div><p>This experimental research work explores the effect of adding carbon–graphene nanoplatelets (CNP) and multiwall carbon nanotube (MWCNT) materials to organic PCM mixtures OM18 and OM21 aimed at improving heat transfer for passive cooling applications onboard marine ships. Nano-enhanced phase change materials (NEPCMs) offer a perfect solution to tackle the primary challenge of inadequate thermal conductivity and heat storage capacity. This advancement enables the efficient utilization of PCMs in marine applications. NEPCMs are prepared by blending of nanomaterials CNP and MWCNT at mass concentrations of 0.2%, 0.4%, and 0.6% into the base PCM organic mixtures OM18 and OM21. The thermal conductivity and phase change enthalpy of NEPCMs are measured experimentally using transient hot wire method and DSC 214 polyma, respectively. The prepared NEPCM samples are stable and the particles have high repulsive forces between them which is confirmed by zeta potential distribution analysis (− 35 mV to − 42 mV). The NEPCM sample OM18 with 0.6 mass% of CNP has shown 47% (0.248 W m⁻¹ K⁻¹) increase in thermal conductivity. This improvement in thermophysical characteristics of the organic blend will reduce energy usage during charging. Implementing cool thermal energy storage (TES) systems on ships can play a vital role in reaching this goal. By decreasing the demand for power generation in HVAC systems, these passive cooling systems can curtail fuel consumption and markedly diminish CO₂ emissions.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"2119 - 2131"},"PeriodicalIF":3.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074200","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":"In situ analysis of magnesium ([NH4]2Mg[CO3]2·4H2O), copper ([NH3]2Cu(CO3)), and zinc ((NH3)Zn(CO3)) ammonium carbonate thermal properties","authors":"Mohamed Ammar,&nbsp;Tadas Dambrauskas,&nbsp;Sahanaz Parvin,&nbsp;Diego Alexander Gonzalez‐Casamachin,&nbsp;Kestutis Baltakys,&nbsp;Jonas Baltrusaitis","doi":"10.1007/s10973-024-13878-y","DOIUrl":"10.1007/s10973-024-13878-y","url":null,"abstract":"<div><p>Three metal ammonium (ammonia) carbonate double salts were mechanochemically synthesized including magnesium ammonium carbonate ([NH₄]₂Mg[CO₃]₂·4H₂O, MAC), copper ammonium carbonate ([NH₃]₂Cu(CO₃), CAC), and zinc ammonium carbonate ((NH₃)Zn(CO₃), ZAC), and their crystallinity and thermal stability were investigated using in situ X-ray diffraction. The crystal structures were investigated in the temperature interval from 25 to 355 °C. MAC exhibited relatively low thermal stability with its crystal structure rapidly losing crystalline water as well as ammonium ions already at 85 °C and transforming into an amorphous carbonate, as confirmed by in situ infrared spectroscopy. CAC and ZAC exhibited loss of the corresponding NH₃ at much higher temperatures transforming into a mixture of the corresponding metal oxides according to the XRD with the outer layer of the carbonate, as suggested by infrared spectroscopy measurements. The thermogravimetric analysis has been carried out to investigate the thermal degradation behavior. Initial fast mass loss was observed in the parent [NH₄]₂CO₃ already under 100 °C with complex mass loss patterns from basic carbonate precursors achieving stable mass at above 500 °C for magnesium carbonate. CAC and ZAC inherited intermediate responses to temperature when compared to the precursors exhibiting stable mass at ~ 300 °C. This can be associated with the distinct crystal structure of the compounds whereby CAC and ZAC exhibit strong bonds with metal ions, while in MAC crystalline water contributes to lower stability of the crystal as well as the loosely bound ammonium ion. Infrared spectra were obtained and interpreted at room temperature followed by their in situ thermal analysis up to 250 °C in attenuated total reflection mode. Changes in the complex room temperature spectra with increasing temperature were interpreted as loss of N–H bonds, as confirmed by the concurrent decrease in the 3350–3000 and 1248 cm⁻¹ band region. It was found that ZAC was the most thermally stable compound among the three double salts. The thermal data obtained in this work have practical implications for nutrient recovery and their release in the environment.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1557 - 1569"},"PeriodicalIF":3.0,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10973-024-13878-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073969","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":"Significance of Marangoni convection and heat generation on Darcy Forchheimer 3D flow of Maxwell ((text{AA}7072+text{AA}7075-{text{CH}}_{3}text{OH})) hybrid nanofluid over a rotating disk","authors":"Munawar Abbas,&nbsp;Hammad. Alotaibi,&nbsp;Taseer Muhammad,&nbsp;J. F. Gómez-Aguilar,&nbsp;Abdullah A. Faqihi,&nbsp;Hassan A. Jari,&nbsp;Abdulhadi A. Altherwi","doi":"10.1007/s10973-024-13778-1","DOIUrl":"10.1007/s10973-024-13778-1","url":null,"abstract":"<div><p>The current model describes the study of Darcy–Forchheimer 3D flow of MHD Maxwell hybrid nanofluid over a rotating disk with Arrhenius activation energy, heat generation, and variable thermal conductivity and mass diffusivity, taking into account with the effects of Marangoni phenomena. A hybrid nanofluid consisting of <span>(AA7072)</span> and <span>(AA7075)</span> aluminum alloys nanoparticles, methanol as the base fluid is used. The <span>(AA7072)</span> alloy is a composition of silicon, ferrous, and copper added to aluminum and zinc in the ratios of <span>(98:1.)</span> Similarly, <span>(AA7075)</span> is a combination of <span>(sim 90, sim 6, sim 3)</span>, and <span>(sim 1)</span> aluminum, zinc, magnesium, and copper, with silicon ferrous and magnesium added. In aerospace engineering, it could help with the planning and refinement of turbine blade cooling systems, guaranteeing effective heat dissipation and extended component life. The model's findings in materials science could improve the creation of sophisticated cooling solutions for high-performance electronics, enhancing the control of thermal expansion in components like electric car batteries and computer processors. The bvp4c approach is used to numerically solve the resulting non-dimensional equations. As the Marangoni convection parameter rises, the concentration and temperature distributions drop while the rates of heat and mass transfer in both hybrid nanofluid and nanofluid increase.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1967 - 1981"},"PeriodicalIF":3.0,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073970","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":"Energy, exergy, and thermoeconomic analysis of a natural gas combined power plant","authors":"Bashar Mohammed Al-Dulaimi,&nbsp;Mutlucan Bayat,&nbsp;Mutlu Tekir","doi":"10.1007/s10973-024-13897-9","DOIUrl":"10.1007/s10973-024-13897-9","url":null,"abstract":"<div><p>This paper explores an innovative power plant design integrating three organic Rankine cycle (ORC) subsystems with a Brayton cycle (BC) to enhance energy conversion efficiency by utilising various waste heat sources. The study applies advanced energy, exergy, and thermoeconomic analyses to comprehensively assess the performance of a natural gas combined cycle (NGCC) power plant, using the energy equation solver (EES) software. The model has been validated against previous research with different parameters, such as compressor efficiency, ambient temperature, and pressure ratio, confirming its accuracy and reliability. The numerical results demonstrate that increasing compressor efficiency from 70 to 88% boosts the NGCC system’s net power output by nearly 60% compared to the Brayton cycle alone. Additionally, both energy and exergy efficiencies of the NGCC improve by 6.6% from the initial state, while the annual cost rate shows a parabolic increase over this range. Furthermore, higher turbine efficiency leads to a 14% increase in overall energy efficiency and a 13% increase in exergy efficiency. An increase in pressure ratio from 6 to 15 raises energy and exergy efficiency by 4% and 3%, respectively. However, the influence of the pressure ratio is less significant compared to the other parameters. Moreover, cycle performance is inversely related to ambient and exhaust gas temperatures.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"150 3","pages":"1869 - 1885"},"PeriodicalIF":3.0,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074210","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}