Thermal Science and Engineering Progress最新文献

{"title":"Performance analysis of a cylindrical heat pipe with corrugated wick","authors":"Pratit Sunder Dev Roy ,&nbsp;Koushik Das ,&nbsp;Hriday Mani Kalita","doi":"10.1016/j.tsep.2025.103597","DOIUrl":"10.1016/j.tsep.2025.103597","url":null,"abstract":"<div><div>Heat pipes are highly efficient thermal management systems that leverage phase change and capillary action to transfer heat with minimal thermal resistance. This study investigates the role of the wick-vapor interface geometry in the performance of a heat pipe. The impact of wick-vapor interface geometry and its surface area on phase change heat transfer rates remains insufficiently explored. To address this gap, the study investigates the influence of an enhanced wick-vapor interface area on heat pipe performance by introducing a novel stepped corrugated wick design. A two-dimensional finite element model is developed and solved at steady state. Sensitivity analysis identifies step height as the key parameter. Optimization using the BOBYQA algorithm yields 7.4 K reduction in evaporator temperature and an enhancement of 131 % improvement in Temperature-Pressure Index as compared to a smooth wick heat pipe of the same wick volume. The results show that the novel design increases thermal conductivity by up to 75 % for a particular heat input. These findings highlight the design’s potential to significantly enhance heat pipe efficiency for advanced thermal management applications.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103597"},"PeriodicalIF":5.1,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856080","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 and economic study of energy-efficient hybrid silica gel adsorption/HDH/AC cogeneration system","authors":"Ahmed E. Abu EL-Maaty ,&nbsp;Rached Ben-Mansour ,&nbsp;Mohammad A. Abido ,&nbsp;Ridha Ben Mansour","doi":"10.1016/j.tsep.2025.103584","DOIUrl":"10.1016/j.tsep.2025.103584","url":null,"abstract":"<div><div>Over the past century, integrated adsorption desalination (AD) systems have gained significant interest as sustainable solutions to the increasing global freshwater demand. Although many hybrid AD systems are presented, ample energy efficiency improvement still exists by integrating humidification de-humidification (HDH) and air conditioning (AC) for water production and thermal comfort cogeneration. In this regard, a comprehensive mathematical model is developed to evaluate key performance metrics for two AD/HDH/AC proposed system configurations. Additionally, multi-objective optimization is employed to identify optimal operating conditions. The results reveal that the hybrid system (Scheme #2) demonstrates high productivity and GOR. At a heating water temperature of 50 °C, it produces up to 181.4 kg/h of water with a maximum GOR of 3.74. This productivity increases to 216.2 kg/h with a GOR of 1.69 under maximum output conditions. For Scheme #1, maximum productivity is 115 kg/h at a GOR of 1.67, while the peak GOR is 3.86 at 65 kg/h. The specific cost per kilogram of water (SCPW) varies between $0.015 and $0.0165, depending on the operating conditions. Key parameters affecting system performance include chilled and heating water temperatures, flow rates, and the mass ratio of the humidifier. The findings show that integrating AC with HDH and AD provides superior performance, offering dual benefits of thermal comfort and water desalination.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103584"},"PeriodicalIF":5.1,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844470","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":"Manuscript Title:Thermal-Electrical scheduling of Low-Carbon Industrial energy systems with rooftop PV: An improved Red-Billed blue magpie optimization approach","authors":"Weile Kong,&nbsp;Mengran Zhou,&nbsp;Feng Hu,&nbsp;Ziwei Zhu","doi":"10.1016/j.tsep.2025.103599","DOIUrl":"10.1016/j.tsep.2025.103599","url":null,"abstract":"<div><div>To address the global warming problem and reduce carbon emissions while considering economic factors, this study proposes an improved Red-billed Blue Magpie Optimizer (IRBMO) for the optimal scheduling of an integrated energy system (IES) with rooftop photovoltaic (RPV). First, a low-carbon IES is developed by integrating renewable energy units with reward-penalty gradient carbon trading, power-to-gas conversion, and carbon capture technologies, utilizing real-world plant data to model RPV. Subsequently, IRBMO is validated by comparing its performance against the CEC 2022 benchmark test functions. Finally, IRBMO is applied to optimize IES scheduling and evaluate its effectiveness against other algorithms. Results demonstrate that IRBMO surpasses RBMO in multiple test functions, exhibiting enhanced global search capability and stability. The proposed IES achieves significant economic and environmental benefits: compared to a system without RPV, it reduces total costs by 37.7% and carbon emissions by 50.7%. In optimal scheduling, IRBMO outperforms the Genghis Khan Shark Optimizer, RBMO, and Coati Optimization Algorithm, lowering total costs by 0.15%, 0.16%, and 4.11%, respectively, and reducing emissions by 2.30%, 1.97%, and 38.47%. This confirms IRBMO’s efficacy in advancing cost-effective and low-carbon energy management.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"61 ","pages":"Article 103599"},"PeriodicalIF":5.1,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833617","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 of natural convection heat transfer in a ship cargo tank filled with high-viscosity fluid","authors":"Koray Sahin ,&nbsp;Selma Ergin","doi":"10.1016/j.tsep.2025.103596","DOIUrl":"10.1016/j.tsep.2025.103596","url":null,"abstract":"<div><div>Experimental research was conducted to elucidate heat transfer by natural convection in a ship cargo tank filled with high-viscosity fluid (heavy fuel oil). The cargo tank was modeled as a 1/20 scale rectangular enclosed volume. The fluid in the enclosed volume was heated from the bottom plate by resistance wires and cooled from the top plate using a circulating thermostatic water bath. The isothermal boundary condition was used for the bottom and top plates. All other boundaries of the rectangular enclosed volume were insulated. Glycerin was used as a working fluid in the enclosed volume to model the large temperature-dependent variation in the viscosity of heavy fuel oil. The effects of the temperature difference between the bottom plate (T_H) and top plate (T_C) on the heat transfer by natural convection and the temperature field in the enclosed volume were experimentally investigated. Experiments were conducted for three different temperature differences (ΔT_p = T_H − T_C) and the Rayleigh (Ra) number was varied between 1.43 x 10⁸ and 6.57 x 10⁸. The Prandtl (Pr) number was varied in the range of 1633.9 ≤ Pr ≤ 3612.1. The temperature profiles in the enclosed volume are presented and the mean Nusselt (Nu) values are calculated. The mean Nu value increased as the ΔT_p increased. In contrast, the time required for the system to stabilize is inversely related to the ΔTp value. The natural convection characteristics in a tank filled with high-viscosity fluid were obtained and an experimental correlation between the Nu and Ra numbers was developed.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"61 ","pages":"Article 103596"},"PeriodicalIF":5.1,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834083","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 of operational modes on the system performance and exergy efficiency of carbon fiber film heater-assisted heat pump drying systems","authors":"Ahmet Yüksel,&nbsp;Ümit İşkan,&nbsp;Cüneyt Tunçkal","doi":"10.1016/j.tsep.2025.103591","DOIUrl":"10.1016/j.tsep.2025.103591","url":null,"abstract":"<div><div>This study investigated the drying performance of apple slices using a closed-circuit heat pump drying (HPD) system enhanced by a carbon fiber film heater (CFFH) integrated under the trays. The motivation behind this research was to improve the coefficient of performance (COP) and drying uniformity of the HPD system through innovative heating strategies. It was hypothesized that different operational strategies of the CFFH would significantly affect the system’s performance and exergy efficiency. To test this, three different CFFH operating strategies were implemented: continuous operation with the HPD system (Case-I), simultaneous intermittent operation with the external condenser (Case-II), and simultaneous intermittent operation with the external evaporator (Case-III). The experimental results revealed that Case-III achieved the highest coefficient of performance for the heat pump (COP_HP) at 4.44 and the highest coefficient of performance for the system (COP_SYS) values at 3.34, while Case-I demonstrated the lowest values at 4.08 for COP_HP and 2.98 for COP_SYS. Compared to the HPD system without CFFH, Case-I yielded higher moisture extraction rate (MER) and specific energy consumption (SEC) values by 0.005 kg/h and 0.935 kg/kWh, respectively, while specific moisture extraction rate (SMER) values were 0.007 kg/kWh lower. Furthermore, the highest exergy efficiency of 90.7 % was observed in the capillary tube during Case-II, whereas the compressor in Case-I exhibited the lowest efficiency at 60.6 %. In conclusion, integrating CFFHs with the HPD system not only facilitated more uniform drying of the apple slices but also enhanced COP_HP.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"61 ","pages":"Article 103591"},"PeriodicalIF":5.1,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834086","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 and numerical study of thermal performance of an additively manufactured microchannel heat exchanger","authors":"Yu Rao ,&nbsp;Yueliang Zhang ,&nbsp;Kehua Xiao","doi":"10.1016/j.tsep.2025.103572","DOIUrl":"10.1016/j.tsep.2025.103572","url":null,"abstract":"<div><div>High-efficiency heat exchangers (HX) play a pivotal role in enhancing the thermal efficiency of micro gas turbines. This study presents an advanced microchannel heat exchanger which was specifically designed adopting a modular design concept. A unit of the heat exchanger was fabricated using additive manufacturing (AM), and steady-state thermal performance experiments were carried out under various operational conditions. The AM microchannel heat exchanger is characterized by wavy microchannels, and the corrugated primary walls are equipped with staggered micro-thickness supporting ribs spanning the height of the wavy microchannels, and the micro ribs work to increase the wetted area and achieve a uniform flow distribution within the microchannels. The AM heat exchanger exhibits compactness exceeding 1700 m²/m³, and industrial CT scanning reveals relatively high-quality except for the collapse of the peaks. Experiments show that the AM heat exchanger achieves a maximum heat transfer efficiency of 0.78 within the Reynolds numbers range of 200–600, and maintains a pressure loss below 3.0 % of the inlet total pressure, which shows about 88.9 % improvement in the average Nusselt numbers compared to conventional flat-plate heat exchangers. Numerical simulations further reveal the flow mechanisms behind the high thermal performance of the microchannel heat exchanger. Due to the regular flow fluctuations over the wavy walls and the flow guiding effects by the micro ribs along the wavy microchannels, the enhanced heat transfer is uniformly distributed across the channels. Apparent vortex structures are formed at the crests and troughs of the corrugated walls, and the sudden contraction at the inlet and expansion at the outlet contribute to additional pressure loss. Through comparing numerical simulations with the experimental data, it is evident that the inherent surface roughness of additive manufactured heat exchanger enhances heat transfer but also leads to greater pressure loss.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103572"},"PeriodicalIF":5.1,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143839400","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 of sprayed water temperature on phase changes in droplets slipping in radiative flue gas flow of industrial biofuel boilers","authors":"Gintautas Miliauskas ,&nbsp;Robertas Poškas ,&nbsp;Egidijus Puida ,&nbsp;Hussam Jouhara","doi":"10.1016/j.tsep.2025.103589","DOIUrl":"10.1016/j.tsep.2025.103589","url":null,"abstract":"<div><div>This work presents the investigation of phase changes of water droplets with an equivalent diameter of 50–500 <!--> <!-->μm and initial temperatures of 40 °C and 90 °C in a flue gas flow with a temperature of 200–1200 °C in the case of complex heating, modeled from the application of technological water injection in industrial biofuel boilers. It was assumed that the radiation and multiple reflection of the soot-coated walls in the two-phase flow of droplets and flue gas provide the spectral intensity of blackbody radiation incident on an individual droplet. Convective droplet heating was defined by an initial Reynolds number of 0–200. A numerical scheme based on an iterative algorithm for determining the instantaneous temperature of the droplet surface, which works according to the fastest convergence method, is based on a balance of heat fluxes. It has been highlighted that in a slipping droplet, there is an intense interaction between absorbed radiation and forced convection processes of water, which defines the complex dynamics of the droplet’s thermal and energy state in phase change regimes. It has been justified that the influence of the temperature of the injected water on the equilibrium evaporation of droplets is insignificant, but it has a significant effect on transitional phase changes in droplets. It has been suggested that the thermal state of water be defined using a parameter expressed as the ratio of the equilibrium evaporation temperature to the water temperature, rather than evaluating it based on its sensory temperature.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103589"},"PeriodicalIF":5.1,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844465","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 analysis and modelling of R1233zd(E) condensation heat transfer and pressure drop in small diameter channels","authors":"Nicolò Mattiuzzo,&nbsp;Arianna Berto,&nbsp;Marco Azzolin,&nbsp;Davide Del Col","doi":"10.1016/j.tsep.2025.103586","DOIUrl":"10.1016/j.tsep.2025.103586","url":null,"abstract":"<div><div>Hydrofluoroolefins such as R1234yf, R1234ze(E) and hydrochlorofluoroolefin R1233zd(E) were suggested as replacements for hydrofluorocarbons in refrigeration and air-conditioning applications. In particular, R1233zd(E) has been indicated for the substitution of R123 and R245fa, since it displays a much lower value of global warming potential but a similar saturation curve. R1233zd(E) is also adopted as a replacement for R245fa in organic Rankine cycles. In the present study the condensation process of R1233zd(E) has been investigated in small channels with internal diameter lower than 4 mm. Condensation experiments have been conducted at 40 °C saturation temperature and mass flux ranging from 30 kg m^-2 s^-1 to 400 kg m^-2 s^-1. Therefore, this study holds particular significance for the design of condensers both in direct Rankine cycles and inverse vapour compression cycles. The adoption of channels with small diameter is intended for reducing the refrigerant charge. The present study is particularly focused onto condensation occurring at reduced mass flux, at 100 kg m^-2 s^-1 and below. Experimental investigations at these mass fluxes are relatively scarce, despite their significant relevance considering that predicting tools are less accurate at these working conditions. The present experimental activity, besides the measurement of the heat transfer coefficients and two-phase frictional pressure drop, includes the visualization of the flow patterns, in a 3.38 mm inner diameter tube. The detected flow regimes have been used to assess a modified flow pattern map and discuss the predictions of three semi-empirical models. Since R1233zd(E) is a low-pressure refrigerant displaying high pressure drop, the condensation heat transfer performance is also affected by the saturation temperature drop due to friction. Therefore, the comparison with other fluids is carried out first at the same mass flux and then at operating conditions that properly account for the pressure drop.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103586"},"PeriodicalIF":5.1,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859324","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 enhancement of phase change material melting using innovative fins","authors":"S.A. Marzouk ,&nbsp;Ahmad Aljabr ,&nbsp;Fahad Awjah Almehmadi ,&nbsp;Maisa A. Sharaf ,&nbsp;Tabish Alam ,&nbsp;Dan Dobrotă","doi":"10.1016/j.tsep.2025.103585","DOIUrl":"10.1016/j.tsep.2025.103585","url":null,"abstract":"<div><div>Enhancing PCM melting is crucial for improving thermal performance in energy storage systems, especially for thermal management and renewable energy applications. This study numerically examines PCM melting in a rectangular enclosure with different fin geometries, including rectangular, constructal, and tree-shaped fins. Key performance indicators such as liquid fraction rate, melting time, and heat transfer rate are analyzed. A numerical model was developed using commercial CFD software where validation against experimental data confirmed the model’s reliability, supporting its effectiveness in optimizing thermal energy storage. The findings reveal that the addition of fins significantly enhances the liquid fraction and reduces the melting time of the PCM. Among the tested designs, tree-shaped fins exhibited the best performance, achieving complete melting within 130 min and 67% reduction in melting time compared to the unfinned enclosure. The use of rectangular and constructal fins decreases the melting time by 41%, and 53%, respectively. The heat transfer rate was highest at the onset of melting and gradually declined over time. Tree-shaped fins also demonstrated superior energy storage capabilities, outperforming constructal, rectangular, and unfinned configurations. The study highlights the role of buoyancy-driven flow in the melting process, where the melted PCM rises to the top of the enclosure. These results underscore the potential of novel fin geometries, particularly tree-shaped fins, to optimize thermal energy storage systems.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"61 ","pages":"Article 103585"},"PeriodicalIF":5.1,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834084","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":"Design and experiment of thermal control system for solar extreme Ultraviolet imager","authors":"Shuai Liu ,&nbsp;Renxin Wang ,&nbsp;Peng Xu ,&nbsp;Liheng Chen ,&nbsp;Zhipeng Yuan","doi":"10.1016/j.tsep.2025.103595","DOIUrl":"10.1016/j.tsep.2025.103595","url":null,"abstract":"<div><div>This paper introduces the design and test of the solar extreme ultraviolet imager’s (EUVI) thermal control system. EUVI is used for real-time observation of solar activity and prediction of space weather, with its thermal control system ensuring the stable operation of the equipment in complex space environments. The thermal control system employs a combination of active and passive methods to control the temperature of each component of EUVI. The heat dissipation problem of EUVI in a complex external heat flow environment is solved through detailed external heat flow analysis, thermal design and simulation calculation. The thermal balance test results show that the temperature of the lens barrel assembly is controlled at 20.01 ℃, and the fluctuation range is within 0.3 ℃, which ensures the temperature stability of the optical system. The temperature of the electric box is between 10.11 ℃ and 30.15 ℃, indicating the effectiveness of the thermal control system in dissipating heat under different working conditions. The CMOS temperature can be controlled at 30.01 ℃ in a closed loop, which greatly reduces the influence of temperature fluctuation on CMOS imaging quality. The reliability of the thermal control system is verified by the thermal balance test, which guarantees the stable operation of EUVI in the extreme space environment. This study also provides important technical reference and experience accumulation for the design of thermal control systems of space instruments and promotes the development of space thermal control technology.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"62 ","pages":"Article 103595"},"PeriodicalIF":5.1,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856082","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}