Thermal Science and Engineering Progress最新文献

{"title":"4E analysis of an integrated solar energy and medical waste management system with PCM storage for healthcare buildings","authors":"Mohammad Yazdani,&nbsp;Mohammad Gholizadeh,&nbsp;Hossein Khabbazi,&nbsp;Mahdi Deymi-Dashtebayaz","doi":"10.1016/j.tsep.2025.103681","DOIUrl":"10.1016/j.tsep.2025.103681","url":null,"abstract":"<div><div>The main objective of this study is to present a near zero cycle to ensure the required heating and cooling loads and power for the Bojnord city clinic. For this purpose, a novel multi-generation cycle proposed including solar collector, medical waste incinerator, absorption chiller, ORC cycle and a PCM tank for energy storage. The PV panels generated 35,052 kWh of electricity over the year, of which 12,636 kWh was sold to the grid. Additionally, by burning 603 tons medical waste over the year, 37,765 kWh of electricity was produced by the ORC cycle. The highest thermal load was recorded in July, reaching 31,628 kWh. Of this, 17,487 kWh was provided by the auxiliary heater, while the remaining demand was met by solar energy. The energy and exergy efficiencies of the system per year are 6.8 % and 2.8 %, respectively. In addition, the solar fraction for heat and electricity was 55.9 % and 37.2 %, respectively. The environmental analysis concluded that the presented cycle reduces carbon dioxide generation to 56362 kg/year. Finally, the economic analysis showed that the NPV value becomes positive after eight years, assuming a 3 % interest rate.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103681"},"PeriodicalIF":5.1,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070035","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":"Mechanisms of ash deposition and corrosion in wall-mounted gas boilers: Compositional analysis and thermal efficiency impacts","authors":"Yang Wu ,&nbsp;Xiong Youhui ,&nbsp;Kong Xiangjun ,&nbsp;Mei Hao ,&nbsp;Shao Kunzhe ,&nbsp;Wang Ben ,&nbsp;Sun Lushi ,&nbsp;Rajender Gupta","doi":"10.1016/j.tsep.2025.103682","DOIUrl":"10.1016/j.tsep.2025.103682","url":null,"abstract":"<div><div>This research systematically investigates ash deposition and corrosion mechanisms in four types of 24 KW wall-mounted gas boilers. Quantitative analysis reveals that corrosive components constitute approximately 90 wt% of condensing boiler ash deposits, predominantly comprising Fe/Cr/Ni metal oxides, SiO₂ and CaSO₄. Si, Ca, and S have a significant impact on the ash deposition and corrosion of wall-mounted gas boilers. SiO₂ particles mainly come from air dust and were prone to ash deposition on the surface of heat exchange coils. S mainly comes from sulfur-containing components in natural gas, such as H₂S and thiols. When inorganic mineral such as aluminosilicate, CaSO₄, and alkali salts deposit on the surface of the heat exchange coil, corrosive media such as S and sulfate further intensify the corrosion of the heating surface material. A nonlinear deterioration of thermal efficiency was observed with progressive ash accumulation. Under typical operating conditions (0.8 mm nominal coil spacing), the heat transfer efficiency experiences a severe 75 % reduction when ash layer thickness reaches the critical threshold of 0.35 mm. Appropriately increasing the gap between heat exchanger coils can effectively mitigate the impact of surface ash on thermal efficiency.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103682"},"PeriodicalIF":5.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943465","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 performance of nanoparticle-infused PCMs in honeycomb-finned cavities for high-efficiency heat storage","authors":"Naresh Kumar Goud Ranga ,&nbsp;S.K. Gugulothu ,&nbsp;P. Gandhi","doi":"10.1016/j.tsep.2025.103675","DOIUrl":"10.1016/j.tsep.2025.103675","url":null,"abstract":"<div><div>This study presents a novel dual-mode thermal enhancement strategy for latent heat thermal energy storage, combining nanoparticle augmentation and geometric optimization through honeycomb extended surfaces. A comprehensive numerical investigation is conducted to evaluate the melting performance of phase change materials (PCMs) enhanced with four different nanoparticles Al₂O₃, Cu, CuO, and graphene nanoplatelets (GnP) at volume concentrations of 2 %, 5 %, 8 %, and 10 %. Unlike prior works, this study provides a side-by-side comparison under identical boundary conditions, offering practical design insights for material geometry combinations. The phase change process is modelled using the enthalpy-porosity method, while natural convection is incorporated through the Boussinesq approximation. Performance metrics include liquid fraction evolution, melting time, and thermal field uniformity. Among all configurations, GnP at 10 % concentration yielded the best performance, reducing the melting time from 3000 s (pure PCM) to 1180 s without fins and further down to 950 s with honeycomb fins. The combination also resulted in a 98 % liquid fraction, temperature gradient reduction of over 60 %, and an increase in absorbed thermal energy from 170 kJ/kg to 218 kJ/kg. Other nanoparticles (Al₂O₃, Cu, CuO) showed moderate enhancements with melting time reductions ranging from 31 % to 43 %, depending on concentration and geometry. The results confirm that the synergistic integration of high thermal conductivity nanoparticles and geometrically optimized fins significantly enhances PCM thermal performance. These findings provide valuable design guidelines for advanced latent heat storage systems used in electric vehicle cooling, solar thermal collectors, and electronics thermal management.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103675"},"PeriodicalIF":5.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943466","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":"Experimental investigation on effects of surface texturing and surfactant on pool boiling performance of a vertically downward-faced copper surface","authors":"Rakesh A.,&nbsp;Inbaoli A.,&nbsp;Sujith Kumar C.S.","doi":"10.1016/j.tsep.2025.103676","DOIUrl":"10.1016/j.tsep.2025.103676","url":null,"abstract":"<div><div>The orientation dependence of boiling surfaces poses a significant challenge to the heat transfer performance of two-phase thermal management systems working based on boiling heat transfer. Substantial reductions in performance were reported when the boiling surface is downward faced (at 180^⁰ orientation) compared to upward faced (0^⁰ orientation). The present study investigated the pool boiling performance of a downward-facing surface, incorporating surface modification via electrical discharge machining (EDM) and modification of the base working fluid, deionised (DI) water, by adding 10 % of the critical micelle concentration (CMC) of Dodecyl Trimethylammonium Bromide (DTAB), an ionic surfactant. The results demonstrated a significant enhancement in heat transfer coefficient in the margin of 50 % and a reduction in wall temperature in the range of 5.5 °C compared to the performance of a plain surface in DI water at a heat flux of 200 kW/m²<em>.</em> The combined effect of surface modification and fluid modification on pool boiling heat transfer presented in this study effectively addresses the boiling instabilities, such as poor bubble dynamics and vapor bubbles hovering on boiling surfaces at lower heat fluxes encountered in downward-facing (adverse gravity conditions) surfaces.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103676"},"PeriodicalIF":5.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070003","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":"Entropy analysis of new proposed Brayton cycle configurations for solar thermal power plants","authors":"Paul Tafur-Escanta ,&nbsp;Robert Valencia-Chapi ,&nbsp;Javier Muñoz-Antón","doi":"10.1016/j.tsep.2025.103670","DOIUrl":"10.1016/j.tsep.2025.103670","url":null,"abstract":"<div><div>The present work is driven by two overarching objectives. Firstly, novel and innovative s-CO₂ Brayton cycle configurations are to be evaluated, including Partial Cooling with Recompression and Main Compressor Intercooling−PCRCMCI, PCRCMCI-RH (with Reheat) and PCRCMCI-2RH (with Dual Reheat). The latter configurations are expected to increase efficiency compared to the Partial Cooling with Recompression−PCRC. Secondly, the impact of three CO₂-based mixtures (CO₂/C₂H₆, CO₂/CH₄, and CO₂/Kr) on the efficiency of the proposed novel cycles is assessed. When the mixture attains optimal efficiency, this value increases between 0.2 and 2.4 percentage points compared to use pure s-CO₂ as working fluid. The most efficient working fluid is found to be that comprising s-CO₂ and ethane in a molar fraction of 0.30/0.70, with an efficiency value of 51.3 % for the PCRCMCI-2RH configuration. The mixture comprising s-CO₂ and methane with a molar fraction of 0.70/0.30, was the second most efficient, with a thermal efficiency of 50.5 % for the PCRCMCI-2RH configuration. The study concluded with a comparative analysis of the exergy efficiency of pure s-CO₂ and s-CO₂ mixtures in two topologies (PCRCMCI and PCRCMCI-2RH). The findings of the study demonstrated that the s-CO₂ mixtures exhibited the capacity to enhance exergy efficiency by up to 5.6 percent points. Furthermore, it was concluded that optimising heat transfer properties and designing equipment accordingly has the potential to enhance efficiency in solar field infrastructure. This finding suggests that s-CO₂ mixtures could play a pivotal role in the development of next-generation energy systems.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103670"},"PeriodicalIF":5.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070076","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":"Comparative study of heat and mass recovery in activated carbon-ammonia physisorption cooling cycles: a novel analytical approach","authors":"Alok Dubey ,&nbsp;Narender Kumar ,&nbsp;Sulaiman Isha ,&nbsp;Hardik Kothadia ,&nbsp;Prodyut R. Chakraborty","doi":"10.1016/j.tsep.2025.103671","DOIUrl":"10.1016/j.tsep.2025.103671","url":null,"abstract":"<div><div>The work described in this manuscript involves systematic analysis of four types of basic and advanced thermodynamic cycles for two-bed continuous adsorption cooling system with activated carbon-ammonia as the working pair. The four cycles under consideration are Basic cycle, Mass recovery cycle (MRC), Heat recovery cycle (HRC), Combined heat and mass recovery cycle (CHMRC). Using ammonia as the refrigerant allow us to build a pressurized system, and greater level of compactness of the system might be achieved as compared to water, ethanol and methanol-based adsorption cooling systems operating under vacuum condition. The usage of ammonia as refrigerant also allows the recovery of high-grade waste heat from exhaust gases coming out of large automobiles having temperature range of 250–500 °C. Three most important performance parameters associated with adsorption cooling, namely: COP, SCE and second law efficiency are evaluated and compared against five control parameters, namely: maximum desorption temperature, minimum adsorption temperature, condensation temperature, evaporation temperature and heat capacity ratio between bed construction material and adsorbent. A simple yet novel iterative scheme is proposed and developed in detail to estimate the equilibrium pressure and associated thermal and compositional states of the two beds after the completion of highly irreversible mass recovery process.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103671"},"PeriodicalIF":5.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935901","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 thermal radiation and dissipation effects on MHD Prandtl hybrid nanofluid flow past an exponential stretched porous device","authors":"Parshuram S. Mane ,&nbsp;Vishwambhar S. Patil ,&nbsp;Amar B. Patil ,&nbsp;Pooja P. Humane ,&nbsp;Ishwar Maharudrappa ,&nbsp;G.C. Sankad","doi":"10.1016/j.tsep.2025.103677","DOIUrl":"10.1016/j.tsep.2025.103677","url":null,"abstract":"<div><div>Fluid dynamics requires a comprehensive understanding of energy dissipation, heat and mass transfer phenomena, since it directly impacts thermal efficiency, flow stability, and energy conservation in various industrial and engineering applications. With this motivation, the present study investigates the magnetized flow of Prandtl mixed hybrid nanofluids across an exponentially stretched surface. The hybrid nanofluid is formed with nanoparticles of Titanium oxide (TiO₂) and Copper (Cu) in water as the base fluid. The governing set of equations is formulated as an extension of the Prandtl fluid model to investigate the physical effects of chemical processes, heat radiation, bioconvection, and energy dissipation. The nonlinear ordinary differential equations are derived after successfully implementing appropriate transformations on governing equations and are solved numerically via the Differential Transform Method (DTM). The graphical illustration of non-dimensional velocity, temperature, and concentration is obtained through MATLAB and discussed with proper physical justification for various terms such as magnetic parameter, chemical reaction, radiation parameter, Sherwood number, Nusselt number, and friction parameter. The outcomes are validated with a comparison of previous published work. Results reveal that hybrid nanofluids significantly enhance heat transfer efficiency compared to conventional nanofluids. Increasing the Eckert and Biot numbers raises temperature, while a stronger magnetic field reduces fluid velocity. Increasing magnetic parameter reduces velocity by 42 % (NF) and 37.5 % (HNF), while increasing Eckert number raises temperature by 67 % (NF) and 53 % (HNF), highlighting strong magnetic and viscous dissipation effects. The findings of this study have significant applications in oil extraction, heat exchanger optimization, and MHD propulsion systems, where energy dissipation and thermal radiation play a crucial role.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103677"},"PeriodicalIF":5.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070074","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":"Absorption-based heat pumps for decarbonization of industrial process heating: performance, current status, and new developments","authors":"Dereje S. Ayou ,&nbsp;Wei Wu ,&nbsp;Alberto Coronas","doi":"10.1016/j.tsep.2025.103679","DOIUrl":"10.1016/j.tsep.2025.103679","url":null,"abstract":"<div><div>In industry, there is a huge demand for process heat to produce, process, or finish products. Industrial process heat originates mainly from the combustion of fossil fuels, so industries need to use sustainable heat supplies if they are to reduce their carbon footprints. In this context, absorption-based heat pumps can offer a viable solution to mitigating the environmental impact of industrial heat consumption. This article reviews and discusses the state of the art of three types of absorption-based heat pumps for industrial heating applications (≥80 °C): absorption-compression heat pumps, absorption heat pumps (Type I heat pumps), and absorption heat transformers (Type II heat pumps). The water/LiBr Type I heat pump technologies currently available are restricted to a maximum heat supply temperature of 100 °C and a temperature lift up to 50 °C with thermal COPs of 1.65–1.80. The water/LiBr Type II heat pumps have a maximum heat supply temperature of 185 °C and a temperature lift of up to 50 °C with thermal COPs of 0.33–0.48. The ammonia/water absorption-compression heat pumps have a maximum heat supply temperature of 160 °C and a temperature lift of up to 110 °C with electrical COPs of 2.7–7.3. However, to fully exploit the potential of these heat pumps in process industries, research and development should focus on increasing heat supply temperature and temperature lift beyond the current limits. The use of these heat pumps to recover industrial waste heat will make a considerable contribution to the decarbonisation of the process industries.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103679"},"PeriodicalIF":5.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935902","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":"Multi-objective optimization of a solar-assisted cogeneration system in hot climate: An exergoeconomic and exergoenvironmental assessment","authors":"Hassan Hajabdollahi,&nbsp;Amin Saleh,&nbsp;Naser Kavousi Yadollahi","doi":"10.1016/j.tsep.2025.103656","DOIUrl":"10.1016/j.tsep.2025.103656","url":null,"abstract":"<div><div>The research investigated a solar-fossil fuel cogeneration system designed to generate power, freshwater, and hydrogen and oxygen in a hot climate. The system comprises multiple components, including the Brayton cycle, heat recovery steam generator, steam turbine, parabolic trough collectors, desalination unit, organic Rankine cycle, and a polymer electrolyte membrane electrolyzer. The optimization approach employed the NSGA-II, aiming to maximize exergy efficiency while minimizing total annual cost. Comprehensive analyses, including energy, exergy, economic, environmental, exergoeconomic, and exergoenvironmental assessments, were conducted. The optimal results indicated that exergy efficiency improved with higher gas turbine inlet temperatures and air compressor pressure ratios, but declined with increasing solar water fractions. Exergoeconomic and exergoenvironmental analyses identified that DB as having the highest exergy destruction cost rate, while the CC exhibited the largest exergy destruction ecological impact rate. In contrast, the solar field demonstrated the lowest cost rate of exergy destruction and minimal ecological impact. The production costs for power, freshwater, and hydrogen–oxygen were determined to be 0.0378 $/kWh, 2.2346 $/<span><math><msup><mrow><mtext>m</mtext></mrow><mtext>3</mtext></msup></math></span>, and 4.0139 $/kg, respectively. The corresponding ecological impact rates were 0.0206 Pts/kWh, 0.7447 Pts/<span><math><msup><mrow><mtext>m</mtext></mrow><mtext>3</mtext></msup></math></span>, and 1.2249 Pts/kg. These findings provide a thorough overview of the system’s performance and optimization from multiple perspectives, highlighting its economic and environmental viability.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103656"},"PeriodicalIF":5.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070077","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 into a new steam ejector with several entrainment channels for energy utilization improvement","authors":"Dongjun Guo ,&nbsp;Jianbo Wang ,&nbsp;Zhisong Zhu ,&nbsp;Linfei Chen","doi":"10.1016/j.tsep.2025.103667","DOIUrl":"10.1016/j.tsep.2025.103667","url":null,"abstract":"<div><div>As an important energy conversion device, steam ejector is a widely used energy-saving technology. To fully utilize the large pressure difference between the low-pressure region and the entrainment fluid entrance, a new ejector with added entrainment channels is developed, so that more entrainment fluid is sucked in the ejector from the added entrainment channels, and to promote the entrainment capacity of the ejector. Three geometrical models of the ejector were established, and the numerical analysis was calculated. Under the condition of different compression ratio and expansion ratio, the entrainment capacity of the ejector with different number of entrainment channels was analyzed and discussed. The results show that with the increase of entrainment channels, reduction of the compression ratio can effectively increase the entrainment ratio and reduce the critical compression ratio, but the optimal expansion ratio decreases, and the less primary fluids is consumed and more entrainment fluids are sucked. Thus, the purpose of reducing energy consumption and effectively heightening the entrainment capacity can be achieved. Compared to a traditional ejector, The entrainment capacity of the ejector with two or three or four entrainment channels increased by 69.98%, 170.7% and 272.29%, respectively. Therefore, by adding the entrainment channels, the entrainment capacity of the ejector is greatly promoted, the production efficiency and energy utilization are improved, and the energy consumption is reduced.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103667"},"PeriodicalIF":5.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929528","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}