Thermal Science and Engineering Progress最新文献

{"title":"Impact of flow resistance on the operational stability of two-phase thermosyphon loop with different working fluids","authors":"Zhen Tong,&nbsp;Zhaolong Zhu,&nbsp;Wencheng Wang,&nbsp;Zekun Han","doi":"10.1016/j.tsep.2025.103463","DOIUrl":"10.1016/j.tsep.2025.103463","url":null,"abstract":"<div><div>When a two-phase thermosyphon loop (TPTL) operates in an oscillatory state, its service life may be shortened due to mechanical impacts. Limited research exists on improving TPTL stability. This study used a needle valve to adjust the flow resistance in the downcomer of a TPTL to analyze its impact on the operational stability of CO₂ and R134a TPTLs. Our research revealed that the operating states of the two TPTLs are affected differently by flow resistance. The fluctuating operation of the CO₂ TPTL is caused by the periodic changes in the flow regime within the loop. An increase in flow resistance led to higher circulating driving force by increasing vapor quality in the riser and decreasing vapor quality in the downcomer. This suppressed the operational instability of the CO₂ TPTL. However, the unstable operation of R134a TPTL resulted from the inherent instability of the stirred flow in the riser. Therefore, the change in flow resistance has almost no effect on the operational stability of the R134a TPTL. The findings of this study provide new insights for improving the operational stability of the CO₂ TPTL.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103463"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552567","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":"Cell thermal modeling and muscle oxygenation measurement in sports based on thermal radiation infrared spectroscopy and sensors","authors":"Hong Yang ,&nbsp;Qiang Gao","doi":"10.1016/j.tsep.2025.103466","DOIUrl":"10.1016/j.tsep.2025.103466","url":null,"abstract":"<div><div>Cell thermal modeling and muscle oxygenation are key indicators to evaluate athletes’ physical fitness and fatigue status. Traditional measurement methods often rely on invasive techniques, which not only inconvenience athletes, but also affect their performance. The aim of this study is to develop a non-invasive method based on thermal radiation infrared spectroscopy and sensor technology. The thermal radiation infrared spectroscopy technology and high sensitivity sensor are used to collect the thermal radiation images of athletes in different sports states. Image processing technology was used to analyze the acquired thermal radiation images, and the characteristic parameters related to cell thermal modeling and muscle oxygenation were extracted. In order to verify the effectiveness of the proposed method, we conducted a comparison experiment with the traditional intrusive measurement method. Through comparative analysis, the consistency between the measurement results based on thermal radiation infrared spectroscopy and the traditional method is evaluated. The results show that the measurement method based on thermal radiation infrared spectroscopy and sensor technology can effectively monitor cell thermal modeling and muscle oxygenation. Compared with the traditional intrusive method, this method has advantages in both accuracy and real-time performance. The thermal radiation images clearly show the heat distribution of athletes in different sports states, and the characteristic parameters obtained through image analysis are closely related to the physical state of athletes.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103466"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552565","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":"Performance evaluation of modified wick belt configuration in rotating wick solar stills using different wick materials","authors":"Gokulnath R,&nbsp;E. Sam Elijah,&nbsp;Rohinikumar Bandaru","doi":"10.1016/j.tsep.2025.103457","DOIUrl":"10.1016/j.tsep.2025.103457","url":null,"abstract":"<div><div>Desalination is the process of removing dissolved salts from saline water. In this work, experimental investigations were conducted on different single slope rotating wick solar stills (RWSS) for improved performance. Water evaporation test was conducted to select the suitable wick materials for the system and the selected wick materials were subjected to water absorption and characterization study. The experiments were conducted on solar still with two different wick configurations, namely, LC rotating wick solar still (LCRWSS) and newly established inclined rotating wick solar still (IRWSS) with different wick materials, and solar still without wick (SSWW). The effect of glass cooling and external reflectors on the performance of the still were also studied. The maximum productivity and efficiency of the system were obtained for jute fabric as the wick material. The daily thermal efficiencies of LCRWSS and IRWSS, with jute wick, are 52.8 % and 57.3 % respectively which are higher than the efficiency of solar still without wick (SSWW), whose efficiency is 22.7 %. IRWSS has more productivity as well as efficiency than LCRWSS for all the wick materials considered. The efficiency of IRWSS increased to 63.8 % with the incorporation of external reflectors. The maximum efficiency of 74.3 % is obtained for IRWSS with reflectors and glass cooling. The contribution to productivity was found to be maximum by the top glass of the still compared to other sides. The distillate cost per litre obtained for SSWW and IRWSS are 0.094 $ and 0.0547 $, respectively.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103457"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552570","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":"A chemical reactor network approach for a gas-assisted iron dust flame in a laboratory-scale combustor","authors":"Sören Dübal ,&nbsp;Pascal Steffens ,&nbsp;Johannes Mich ,&nbsp;Daniel Braig ,&nbsp;Antje Vahl ,&nbsp;Leon L. Berkel ,&nbsp;Arne Scholtissek ,&nbsp;Tiziano Faravelli ,&nbsp;Christian Hasse ,&nbsp;Hendrik Nicolai ,&nbsp;Sandra Hartl","doi":"10.1016/j.tsep.2025.103435","DOIUrl":"10.1016/j.tsep.2025.103435","url":null,"abstract":"<div><div>Metal powders demonstrate promising performance when reacting with oxygen in laboratory-scale reactors, releasing the chemically stored energy as heat. To scale up this technology, chemical reactor network (CRN) modeling serves as a critical tool to bridge the gap between laboratory experiments and real-world applications. In this work, a multi-phase CRN is derived to analyze the iron oxidation and pollutant formation in a novel methane-assisted iron dust flame in a laboratory-scale combustor. State-of-the-art single particle oxidation models are employed to describe the conversion of iron particles, while gas phase combustion is modeled with a detailed kinetic mechanism within fully coupled reactors. The approach is validated for single particle combustion using the solid-gas plug flow reactor. It is demonstrated, that a reactor network model with four solid-gas perfectly stirred reactors accurately reproduces the flame structure of laminar iron flames. Subsequently, both ideal reactor models are combined in a multi-phase reactor network to analyze iron oxidation, evaporation and NOx formation in the swirl burner. The CRN design is based on a recent high-fidelity Large Eddy Simulation. The monodisperse description of the iron suspension within the CRN reveals that different initial particle diameters significantly influence the estimated evaporated mass, ranging from less than 0.5% for <span><math><mrow><mn>20</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> particles to approximately 4% for <span><math><mrow><mn>5</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> particles, while the overall iron conversion remains largely unaffected. Furthermore, sensitivity analyses highlight the critical role of the oxygen distribution and local gas temperatures within the reactor to effectively control NOx formation and potential nano-oxide emissions during iron combustion.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103435"},"PeriodicalIF":5.1,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552345","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":"Parametric image design and visualization simulation based on infrared thermal image fusion algorithm","authors":"Guangyi Tang ,&nbsp;Xiaozhan Ma","doi":"10.1016/j.tsep.2025.103462","DOIUrl":"10.1016/j.tsep.2025.103462","url":null,"abstract":"<div><div>Infrared thermal image can provide intuitive information about the surface temperature distribution of objects, but the traditional infrared thermal image processing methods have problems such as low resolution and lack of detailed information, which limits its application in more complex scenes. This paper presents a parametric image design and visualization simulation method based on infrared thermal image fusion algorithm. This paper studies the use of highly sensitive infrared thermal imager to collect thermal image data of target objects under different conditions, and preprocesses the collected infrared thermal images. An algorithm based on multi-scale transformation and image fusion is designed to effectively fuse multiple infrared thermal image data sources, and a parametric design mechanism is introduced to allow users to adjust fusion parameters according to actual application scenarios. In this way, users can customise the generation of thermal images that meet specific needs. Through visual simulation technology, the fusion thermal radiation image is displayed in an intuitive way. In the simulation process, different environmental conditions and object characteristics can be simulated to evaluate the performance and applicability of thermal images in different scenarios. The results show that compared with the traditional method, the thermal radiation image generated by this method has a great improvement in resolution and detail performance. The proposed method not only improves the thermal image quality, but also enhances its applicability and flexibility through parametric design.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103462"},"PeriodicalIF":5.1,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552568","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 validation of design-induced change on the opto-thermal performance of solar box cooker utilizing the novel design of cooking pot","authors":"P.S. Panja ,&nbsp;Atul A. Sagade ,&nbsp;S.K. Samdarshi ,&nbsp;Md Rahbar Jamal","doi":"10.1016/j.tsep.2025.103455","DOIUrl":"10.1016/j.tsep.2025.103455","url":null,"abstract":"<div><div>The present work explores the influence of design-induced change on the performance of box solar cooker (BSC). A novel cooking pot design with stainless steel fins on its lateral surface and a glass lid is fabricated and tested under field conditions. The performance of the BSC with a new cooking pot is evaluated and compared using a TPP-based test protocol. The present work is the first evidence of using the proposed novel cooking pot’s design in a BSC operating at an intermediate temperature. The inter-cooker performance of BSC with a new cooking pot design is compared with the same BSC design tested previously with two other cooking pot designs.</div><div>The opto-thermal performance of a BSC with a new pot design resulted in the COR as 0.115 [(m²·°C)/W]. The typical experimentally observed maximum achievable load temperature and reference time values are 136.6 °C and 42 min, respectively. A comparison of the results showed that the earlier values of COR of the same BSC tested with the modified cooking pot (MCP) and the conventional cooking pot (CCP) are relatively higher. Thus, the present work depicted the influence of minor design changes and the detrimental impact of external fin on the thermal performance of BSC. Hence, the proposed study will contribute to developing innovative designs of cooking vessels operating at intermediate temperatures and give insights into the pros and cons that must be considered while creating them.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103455"},"PeriodicalIF":5.1,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552349","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":"Lateral conduction effect study using 2-D transient liquid crystal measurement","authors":"Vaibhav Sharma,&nbsp;Andallib Tariq","doi":"10.1016/j.tsep.2025.103456","DOIUrl":"10.1016/j.tsep.2025.103456","url":null,"abstract":"<div><div>In most liquid crystal thermography (LCT) based heat transfer investigations, one-dimensional (1-D) conduction solution for semi-infinite wall is widely used to determine surface heat transfer coefficients (HTCs). The conventional 1-D solution ignores the transverse and longitudinal variation of surface temperature values, which makes HTCs prone to lateral conduction errors. Accounting the lateral conduction effect demands full-scale multidimensional boundary conditions, which is seldom possible in Liquid Crystal (LC) experiments. Present investigation is a forward step in that direction and performs comprehensive analysis to evaluate the lateral conduction effect with the help of actual LC measurements. Investigations have been performed at different Reynolds number for the duct carrying smooth surface and surface mounted with different types of turbulence promoters, i.e., round-edged perforated rib (2-D rib) and truncated prismatic rib (3-D rib), which are supposed to produce two/three-dimensionality in flow field and hence the lateral conduction effects. Eventually, 2-D and 3-D conduction results are compared against 1-D results. Accuracy and reliability of transient conduction scheme is also reviewed by varying several inherent parameters. For undisturbed flow (smooth duct), 1-D solution (wall normal, y-direction) under predicts HTC as against the transverse spanwise (2-D), longitudinal streamwise (2-D), and full scale multidimensional (3-D) conduction results by ∼ 7–9 %, 2–4 %, and 8–12 %, respectively. 2-D conduction-based (transverse or longitudinal) solution fails to predict the actual HTC distribution in vortex induced flow condition (ribbed duct). 3-D conduction-based analysis accurately capture the small-scale HTC distribution pattern, and yields 10–13 % higher HTC values as against conventional 1-D semi-infinite conduction-based solution.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103456"},"PeriodicalIF":5.1,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552348","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":"Test bench for radiative waste heat recovery in steel mills","authors":"I. Mesonero ,&nbsp;P.F. Arroiabe ,&nbsp;J. Iturralde ,&nbsp;S. López ,&nbsp;M. Martinez-Agirre ,&nbsp;M. Gómez de Arteche ,&nbsp;S. Herrero ,&nbsp;M.Mounir Bou-Ali","doi":"10.1016/j.tsep.2025.103458","DOIUrl":"10.1016/j.tsep.2025.103458","url":null,"abstract":"<div><div>This paper presents the design, manufacturing, and validation of a test bench for a radiation waste heat recovery system, which can reproduce the operating conditions of a real steelmaking factory, in particular, continuous casting. The experimental unit consists of three main components: an emitter, a heat capturing device and a thermal oil loop. The influence of different operating conditions, including emitter surface temperature, thermal oil inlet temperature, and oil mass flow rate, on the performance of the recovery unit was evaluated. Additionally, the impact of the corner effect was studied to determine the effect on the radiation heat transfer. The results showed that the proposed experimental unit can achieve surface temperatures up to 1000 °C, which are like those found in the selected area of the steelmaking process. The temperature of the emitter was found to have a substantial effect on the performance of the heat recovery unit, especially when the temperature is below 800 °C. The oil inlet temperature and mass flow rate were also found to influence the thermal radiation heat transfer rate and the recovery efficiency of the device. The findings reveal the importance of the maximum temperature, oil inlet temperature, and oil mass flow rate for optimizing the waste heat recovery system. This study proposes a valuable experimental methodology for analysing thermal radiant heat recovery units under real conditions, which can be helpful in developing optimized systems to harness waste heat from high-temperature energy-intensive industries, considerably reducing their carbon footprint.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103458"},"PeriodicalIF":5.1,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552564","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":"Advanced cryocooler system design for superconducting aircraft propulsion: Integrating air-cycle reverse Brayton refrigeration with cryogenic hydrogen cooling","authors":"Yat Huang Yau ,&nbsp;Dengshuo Lai ,&nbsp;Poo Balan Ganesan","doi":"10.1016/j.tsep.2025.103451","DOIUrl":"10.1016/j.tsep.2025.103451","url":null,"abstract":"<div><div>Direct cryogenic hydrogen cooling is the primary method employed for the Turboelectric Distributed Propulsion (TeDP) system in N3-X aircraft. To enhance this approach, a hybrid cryocooling system (HCS) is developed, which integrates an air-cycle cooling (ACC) subsystem for precooling and a cryogenic hydrogen cooling (CHC) subsystem for aftercooling. This innovative configuration aims to reduce the mass of cooling hydrogen, minimize redundancy, and provide more flexible cooling control. For this hybrid cooling system, this study proposes an analytical framework for system construction, optimization, and feasibility analysis, leveraging Engineering Equation Solver (EES) and Refprop software for detailed numerical analysis. Based on this framework, this study proposes a fundamental HCS, develops the cooling distribution for high-temperature superconducting components, analyzes HCS operational scenarios to accommodate various heat load conditions, and conducts predictive evaluations of refrigerant hydrogen demand and the total system mass. The HCS shows significant potential for the N3-X aircraft, offering a viable alternative to conventional cooling methods, while this analytical framework provides valuable guidance for future hybrid cooling system design.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103451"},"PeriodicalIF":5.1,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580251","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":"Research on financial optimization of automatic production process in intelligent manufacturing factory based on cloud computing and thermal energy consumption optimization","authors":"Yueqing Hu","doi":"10.1016/j.tsep.2025.103450","DOIUrl":"10.1016/j.tsep.2025.103450","url":null,"abstract":"<div><div>Under the current wave of Industry 4.0, the automated production process of smart manufacturing plants is becoming increasingly complex and efficient. The increasing proportion of heat consumption in the production process has become an important factor affecting production costs and environmental sustainability. This paper aims to explore how to realize the financial optimization of automatic production process of intelligent manufacturing plant by combining cloud computing technology with thermal energy consumption optimization strategy. This paper introduces the background of automatic production processes in intelligent manufacturing plants, and expounds the importance and current challenges of thermal energy consumption in them. The research focuses on how to use the powerful computing power and big data analysis capabilities of cloud computing platforms to monitor and manage heat consumption in real time. The cloud computing platform will serve as the core of data processing and analysis, supporting large-scale data storage, processing and analysis tasks. The thermal management system is responsible for collecting heat usage data in the production process and analyzing it through the cloud computing platform. By establishing a heat consumption model, the heat demand under different production conditions is predicted, so as to achieve accurate supply and optimal distribution of heat energy. The results of the study will show that by implementing cloud computing and thermal optimization strategies, the thermal energy consumption of smart manufacturing plants is significantly reduced, and the production cost is also reduced, indicating that through cloud computing and thermal optimization strategies, not only financial optimization can be achieved, but also improve the environmental sustainability of smart manufacturing plants.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"60 ","pages":"Article 103450"},"PeriodicalIF":5.1,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552566","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}