Case Studies in Thermal Engineering最新文献_第9页

Performance comparison of LFPSC-ASHP and VTSC-ASHP heating systems based on oil and gas gathering and transportation stations 基于油气集输站的LFPSC-ASHP与VTSC-ASHP供暖系统性能比较

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-08 DOI: 10.1016/j.csite.2025.106269

Zhenglong Zhang , Zhiguo Wang , Yixing Yang , Haoyu Chen , Peiyuan Chen

{"title":"Performance comparison of LFPSC-ASHP and VTSC-ASHP heating systems based on oil and gas gathering and transportation stations","authors":"Zhenglong Zhang , Zhiguo Wang , Yixing Yang , Haoyu Chen , Peiyuan Chen","doi":"10.1016/j.csite.2025.106269","DOIUrl":"10.1016/j.csite.2025.106269","url":null,"abstract":"<div><div>To addressing the high operating costs, low energy efficiency, and severe carbon emissions of high-carbon heating systems in oil and gas collectors, we proposes a new dynamic and complementary energy supply framework that couples an inverted air source heat pump with a solar collector. Unlike existing hybrid heating systems for intermittent residential demand, our solution is specifically designed for continuous heat load requirements (90 % load stability), extremely low temperature adaptation (−30 °C), and corrosion resistance inherent to industrial oil field operations. The large flat plate (LFPSC) and vacuum tube solar collector (VTSC) coupled systems were compared by TRNSYS simulation. Compared to the LFPSC, the VTSC-ASHP has a peak efficiency of 67.9 %, an average collector efficiency of 34.99 %, a heating efficiency increase of 13.10 %, an energy saving of 16.78 %, and a higher SEER (5.23 vs. 4.61). Crucially, VTSC-ASHP reduces annual coal consumption by 2230.89 kg (80.61 % primary energy saving) and shortens payback period by 1.82 years through dynamic multi-energy coordination. The core innovation of this study is that it achieves both energy cost optimisation for industrial heat networks and fills the gap in the technology for low-carbon retrofit of oil and gas gathering and transportation stations for all-weather stable energy supply.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106269"},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on heat transfer characteristics of crude oil storage tank heated by jet in combination with mechanical stirring 射流加热与机械搅拌相结合的原油储罐传热特性研究

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-08 DOI: 10.1016/j.csite.2025.106227

Hang Dong , Xiaowan Liang , Xiaonian Xiong , Mingyu Lei , Jian Zhao

{"title":"Research on heat transfer characteristics of crude oil storage tank heated by jet in combination with mechanical stirring","authors":"Hang Dong , Xiaowan Liang , Xiaonian Xiong , Mingyu Lei , Jian Zhao","doi":"10.1016/j.csite.2025.106227","DOIUrl":"10.1016/j.csite.2025.106227","url":null,"abstract":"<div><div>Mechanical stirring can enhance the jet heating of storage tanks. However, the internal heat transfer characteristics during heating and the effects of different agitators are unclear. This paper simulated the heating process of single jet and three agitators under different stirring speeds, considering crude oil rheology and wax crystal latent heat, using the SIMPLE algorithm. Results show that mechanical stirring spreads jet - introduced heat across the domain, making the temperature field more uniform. The agitator B, with higher impact flow velocity, a broader velocity core, and wider reflux coverage, was most effective. After 4 - hour heating, it raised the average temperature by 0.13 °C over the single jet, reduced temperature variance by 80 %, and increased the heating rate by 12.5 %. At high speed (350 rpm), the three impellers showed little difference. At low speed (150 rpm), the agitator B also increased the minimum temperature. After 4 - hour heating, the domain's minimum temperature was 1.04 °C higher than the single jet, and 0.35 °C and 0.37 °C higher than the agitators A and C. The findings also apply to large - scale oil storage facilities and different crude oil types. Both high-speed stirring and low-speed stirring were comprehensively evaluated from various perspectives.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"71 ","pages":"Article 106227"},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal comfort and energy-saving retrofits: An empirical study in high-altitude regions 热舒适与节能改造：高海拔地区的实证研究

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-08 DOI: 10.1016/j.csite.2025.106220

Wenjing Sun , Lixing Chen , Yingzi Zhang , Baimu Suolang , Lele Yuan , Kai Liu , Yong Xia , Yuan Chen

{"title":"Thermal comfort and energy-saving retrofits: An empirical study in high-altitude regions","authors":"Wenjing Sun , Lixing Chen , Yingzi Zhang , Baimu Suolang , Lele Yuan , Kai Liu , Yong Xia , Yuan Chen","doi":"10.1016/j.csite.2025.106220","DOIUrl":"10.1016/j.csite.2025.106220","url":null,"abstract":"<div><div>With the intensification of global warming, issues related to human thermal comfort have become increasingly prominent. In Xizang's extreme climate, indoor thermal comfort faces significant challenges. This study conducts an empirical investigation of an office building in Lhasa, employing on-site surveys, questionnaires, and field measurements to evaluate and validate the effectiveness of passive retrofit strategies in improving indoor thermal environments and thermal comfort. The results indicate the following: (1) The synergistic application of passive solar heat gain and high/low-heat-capacity materials is the most suitable passive strategy for Lhasa; (2) optimizing external wall insulation, window materials, and increasing the window-to-wall ratio significantly enhances indoor thermal comfort levels but requires further integration with humidity control and thermal storage strategies; (3) for the retrofitting of envelope structures on different orientations and floors, differentiated strategies should be adopted based on local climate conditions and surrounding environmental characteristics to optimize thermal performance; (4) Retrofitting existing buildings should address both winter heat gain needs and indoor humidity and ventilation, achieved through indoor greenery and optimized ventilation strategies for precise temperature and humidity control. This study provides essential references and optimization strategies for the passive retrofitting of office buildings in high-altitude, cold regions.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106220"},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating biodegradable alternatives to petroleum-based phase change materials in enclosed cavity heat transfer 评价封闭腔传热中可生物降解石油基相变材料的替代品

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-08 DOI: 10.1016/j.csite.2025.106300

Abdullah Aziz , Eiyad Abu-Nada , Anas Alazzam

{"title":"Evaluating biodegradable alternatives to petroleum-based phase change materials in enclosed cavity heat transfer","authors":"Abdullah Aziz , Eiyad Abu-Nada , Anas Alazzam","doi":"10.1016/j.csite.2025.106300","DOIUrl":"10.1016/j.csite.2025.106300","url":null,"abstract":"<div><div>Finding biodegradable alternatives to petroleum-based phase change materials (PCMs) is essential for sustainable thermal energy storage. This study presents a numerical investigation comparing paraffin wax (petroleum-based) and beeswax (biodegradable) in two-dimensional enclosed aluminum cavities of varying height-to-width ratios (H/L = 0.5, 1, 2) and heating configurations (bottom and side heating), using finite-element method. A novel viscosity model for each PCM was developed using existing experimental data to improve prediction accuracy. Key features such as convective cell formation, thermal plumes, and viscous fingering were analyzed through time-resolved velocity, temperature, and liquid fraction contours. The results showed that paraffin wax exhibits faster melting due to lower viscosity and thermal conductivity, but also more unstable convective behavior. Beeswax, in contrast, displayed slower yet more uniform melting with greater thermal stability. The highest heat transfer was observed for H/L = 2 due to stronger vertical convection. Bottom heating was more effective in promoting uniform melting compared to side heating, which resulted in thermal stratification. This study demonstrates that biodegradable PCMs like beeswax can offer comparable thermal performance with improved stability, making them viable for sustainable thermal management systems.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106300"},"PeriodicalIF":6.4,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on the characteristic premixed methane/hydrogen deflagration and water mist suppression in a semi-confined duct 半密闭管道中甲烷/氢预混爆燃特性及水雾抑制试验研究

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-07 DOI: 10.1016/j.csite.2025.106280

Amanuel Girma Bekele, Bin Zhang, Yuanchen Xia, Boqiao Wang, Zhang Siqi, Wanying Yue

{"title":"Experimental study on the characteristic premixed methane/hydrogen deflagration and water mist suppression in a semi-confined duct","authors":"Amanuel Girma Bekele, Bin Zhang, Yuanchen Xia, Boqiao Wang, Zhang Siqi, Wanying Yue","doi":"10.1016/j.csite.2025.106280","DOIUrl":"10.1016/j.csite.2025.106280","url":null,"abstract":"<div><div>This study investigates the characteristics of the deflagration process in premixed methane/hydrogen mixtures and the suppression effect of water mist in a semi-confined duct under various experimental conditions. Increasing the hydrogen fraction in the methane/hydrogen mixture enhanced the maximum flame velocity, maximum overpressure, pressure rise rate, and deflagration intensity. For unobstructed deflagration at an equivalence ratio of 1, deflagration intensities increased by 43.53 % and 122.63 % for hydrogen fractions of 25 % and 35 %, respectively, compared to a 15 % hydrogen fraction. In obstructed deflagration, Rayleigh-Taylor and Kelvin-Helmholtz instabilities intensified flame instability and turbulence vortices between obstacles. Compared to unobstructed deflagration, obstructed deflagration showed increases of 165.04 % in maximum flame propagation velocity, 161.18 % in maximum overpressure, 293.96 % in maximum pressure rise rate, and 985.35 % in deflagration intensity. Under suppression with 8 μm water mist, yellow-colored bubbles persisted behind the flame front until the flame exited the duct. However, as the water mist droplet diameter increased, the appearance of yellow-colored bubbles behind the flame front diminished, and suppression efficiency gradually decreased with increasing droplet size.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106280"},"PeriodicalIF":6.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical analysis of the thermal and electrical performance of concentrated photovoltaic systems integrated with multiple phase change materials 多相变材料聚光光伏系统热电性能数值分析

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-07 DOI: 10.1016/j.csite.2025.106251

Atef Chibani , Slimane Merouani , Riad Badji , Farhan Lafta Rashid , Mohamed Kezzar , Sahar Ahmed Idris , Mohamed Rafik Sari , B. Rushi Kumar , Sunitha Nagarathnam

{"title":"Numerical analysis of the thermal and electrical performance of concentrated photovoltaic systems integrated with multiple phase change materials","authors":"Atef Chibani , Slimane Merouani , Riad Badji , Farhan Lafta Rashid , Mohamed Kezzar , Sahar Ahmed Idris , Mohamed Rafik Sari , B. Rushi Kumar , Sunitha Nagarathnam","doi":"10.1016/j.csite.2025.106251","DOIUrl":"10.1016/j.csite.2025.106251","url":null,"abstract":"<div><div>Great attention has been paid to the improvement of the efficiency of photovoltaic (PV) systems and their profit due to the constantly growing demand for effective energy solutions. The rise of the demands for efficient energy solutions in terms of environmental influence needed much concern to make solar (PV) systems work better, especially in the hot climates where huge ambient temperature influences the efficacy of PV systems. This paper examines the use of multi-layered phase change materials (PCMs) in parallel arrangement for PV thermal control to lower the temperature increase and enhance the energy production. The study uses a numerical method to compare and determine the thermal efficiency of PV systems deployed at different angles (0, 30, 45, 75 and 90°) on the PCM's freezing and melting behavior. The usage of multi-layered phase change materials has been demonstrated to effectively reduce the surface temperature of photovoltaic panels by as much as 25 °C, thereby leading to a significant enhancement of electrical efficiency by about 5.18 %. Hence, the study of the liquid fraction contours resulting from the heat transfer operation discloses that a greater tilt angle promotes faster and more effective melting of the PCM. Other maps presenting temperature contours also emphasize that steeper angles result in lower maximum temperatures and small thermal gradients inside the PCM, which are essential to support the required operation conditions.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106251"},"PeriodicalIF":6.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimising building envelope retrofits under future climates: Integrating passive, active, and renewable strategies 优化未来气候下的建筑围护结构改造：整合被动、主动和可再生策略

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-07 DOI: 10.1016/j.csite.2025.106219

Duc Minh Le , Philip Christopher , Tuan Ngo

{"title":"Optimising building envelope retrofits under future climates: Integrating passive, active, and renewable strategies","authors":"Duc Minh Le , Philip Christopher , Tuan Ngo","doi":"10.1016/j.csite.2025.106219","DOIUrl":"10.1016/j.csite.2025.106219","url":null,"abstract":"<div><div>This study aims to enhance building energy efficiency and resilience during retrofitting stages to address future climate change impacts by examining a representative commercial building model across various cities. To this end, comprehensive retrofit parameters for the building envelope, including passive, active, and renewable design elements, were integrated into a simulation-based optimisation framework to minimise building energy use, enhance thermal comfort, and reduce life-cycle costs. The optimisation process revealed the significant influence of varying climate scenarios on building performance and the effectiveness of different retrofit strategies. Results demonstrate that renewable energy generation has the potential to meet cooling, heating, and lighting demands under diverse conditions. Seasonal and temperate climates show potential for retrofitted buildings to meet net-zero energy buildings (NZEB) by 2050, with retrofit costs maintaining comparable to current levels. However, due to global temperature warming, the risk of overheating is anticipated to increase significantly across all cities, from an average of 4.91 % under current conditions to 23.98 % in future scenarios, posing substantial challenges in managing heat-related stress for occupants. Moreover, by employing the heuristic multi-criteria decision-making (MCDM) framework to identify optimal retrofit solutions for different regions, the findings underscore the limitations of current climate-based design approaches and recommend tailored strategies that consider both interactions between retrofit parameters and local climate conditions to effectively achieve zero-energy targets in the future.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106219"},"PeriodicalIF":6.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature field characteristics of concrete box girders in rigid-frame bridges based on fine simulation and monitoring 基于精细仿真与监测的刚架桥混凝土箱梁温度场特征

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-07 DOI: 10.1016/j.csite.2025.106265

Minshui Huang , Jianwei Zhang , Jun Li , Hongping Zhu

{"title":"Temperature field characteristics of concrete box girders in rigid-frame bridges based on fine simulation and monitoring","authors":"Minshui Huang , Jianwei Zhang , Jun Li , Hongping Zhu","doi":"10.1016/j.csite.2025.106265","DOIUrl":"10.1016/j.csite.2025.106265","url":null,"abstract":"<div><div>The non-uniform temperature distribution in long-span double-box single-cell concrete box girder bridges can lead to reduction in structural bearing capacity and temperature-induced diseases. In this paper, a fine simulation method for two-dimensional non-uniform temperature field of double-box single-cell concrete box girders is proposed. The temperature time history and temperature gradients are validated based on long-term measurement data from temperature monitoring in long-span single-pier rigid-frame bridge. The proposed simulation method is used to recover missing data for temperature measurement points. Vertical and transverse temperature distribution characteristics of the box girder are investigated by combining measured values, simulated values and statistical analysis method. The average annual temperature of box girder is 20.10 °C, with daily temperature variations ranging from 0.15 °C to 2.96 °C at all measurement points. The standard values and models of the most disadvantageous vertical in dayside web and transverse temperature difference are obtained. The results indicate that the temperature distribution of double-box single-cell concrete box girders has obvious non-uniformity. Some temperature difference models differ from the gradient patterns specified in the code substantially. The research results of this study can supply references for temperature field simulation, temperature effects calculation, and codes design for long-span double-box single-cell concrete box girder bridges.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106265"},"PeriodicalIF":6.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Based on the study of icing characteristics of FENSAP-ICE multi-row perforated wind turbine blades 基于FENSAP-ICE多排穿孔风力机叶片结冰特性研究

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-07 DOI: 10.1016/j.csite.2025.106299

Jing-mei Yu , Ya-chao Shi , Yao-hong Liu , Chun-long Bai

{"title":"Based on the study of icing characteristics of FENSAP-ICE multi-row perforated wind turbine blades","authors":"Jing-mei Yu , Ya-chao Shi , Yao-hong Liu , Chun-long Bai","doi":"10.1016/j.csite.2025.106299","DOIUrl":"10.1016/j.csite.2025.106299","url":null,"abstract":"<div><div>The icing of horizontal-axis wind turbine blades in cold regions significantly alters their power output and aerodynamic performance. To address this issue, an air film heating method was implemented for anti-icing. The NACA63 (2)-215 airfoil was chosen as the subject of study. Numerical simulations of frost formation were performed on both the modified airfoil with leading-edge film holes and the original airfoil, using FLUENT and FENSAP-ICE software. Ice formation characteristics were analyzed for both airfoils under varying inflow wind speeds and liquid water content. The study reveals that the holed airfoil demonstrates effective anti-/de-icing performance compared to the original airfoil across various angles of attack, although the location of ice suppression shifts with increasing angle. At low liquid water content, ice accumulation at the jet-induced air film is notably reduced compared to the original airfoil. Overall results indicate that air film heating can effectively reduce icing on the leading edge when the icing duration is under 3 h and liquid water content is below 0.25 g/m<sup>3</sup>.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106299"},"PeriodicalIF":6.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing drying and storage for edible mushrooms: Study on gamma irradiation levels, drying temperatures, and packaging materials with SVM-based predictions 优化食用菌的干燥和储存：基于支持向量机预测的伽马辐照水平、干燥温度和包装材料的研究

IF 6.4 2区工程技术

Case Studies in Thermal Engineering Pub Date : 2025-05-07 DOI: 10.1016/j.csite.2025.106288

Ehsan Fartash Naeimi , Mohammad Hadi Khoshtaghaza , Kemal Çağatay Selvi , Mariana Ionescu , Soleiman Abbasi

{"title":"Optimizing drying and storage for edible mushrooms: Study on gamma irradiation levels, drying temperatures, and packaging materials with SVM-based predictions","authors":"Ehsan Fartash Naeimi , Mohammad Hadi Khoshtaghaza , Kemal Çağatay Selvi , Mariana Ionescu , Soleiman Abbasi","doi":"10.1016/j.csite.2025.106288","DOIUrl":"10.1016/j.csite.2025.106288","url":null,"abstract":"<div><div>The control of dried product quality is crucial for preservation and marketability. In this study, the effects of gamma irradiation doses (0, 1.2, 2.4, and 3.6 kGy) and drying temperatures (50, 60, and 70 °C) on the drying rate, lightness (L∗), and texture firmness of mushroom slices were evaluated. In addition, dried samples were packaged in three materials: polyethylene, polypropylene, and a silicone nanoemulsion-based nanocomposite. After four months, the effect of packaging on L∗ and firmness were assessed. Higher irradiation doses and drying temperatures significantly (P < 0.01) enhanced drying rates, ranging from 0.39 g/g∙min for control samples at 50 °C to 0.95 g/g∙min for 3.6 kGy and 70 °C. Higher irradiation doses and lower temperatures yielded better L∗ values (74–78) and texture firmness (41–50 N). Packaging materials and drying conditions significantly affected (P < 0.01) texture firmness, while packaging showed no significant effect (P > 0.01) on L∗. The Support Vector Machine (SVM) algorithm accurately predicted change in L∗ and texture firmness after six months of storage, with the Pearson universal kernel producing the highest correlation coefficients (0.996, 1.000, and 1.000). This kernel outperformed the others in estimating parameter changes within the integrated SVM-based modeling framework. Overall, gamma irradiation effectively reduced drying time while maintaining product quality, presenting a viable alternative to expensive industrial drying. Nanocomposite packaging preserved the appearance characteristics of the dried mushrooms, and the SVM algorithm demonstrated strong potential for predicting quality changes prior to processing.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106288"},"PeriodicalIF":6.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0