Renewable Energy最新文献_第9页

Laser-based automated optical inspection for edge small defect detection in photovoltaic silicon wafers with complex backgrounds 基于激光的光电硅片边缘小缺陷自动检测

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-07 DOI: 10.1016/j.renene.2025.123658

Wei Hu , Qunbiao Wu , Haifeng Fang , Jiongjie Chen , Luo Jiachao , Lihua Cai

{"title":"Laser-based automated optical inspection for edge small defect detection in photovoltaic silicon wafers with complex backgrounds","authors":"Wei Hu , Qunbiao Wu , Haifeng Fang , Jiongjie Chen , Luo Jiachao , Lihua Cai","doi":"10.1016/j.renene.2025.123658","DOIUrl":"10.1016/j.renene.2025.123658","url":null,"abstract":"<div><div>Defect detection plays a critical role in ensuring the efficiency of photovoltaic (PV) production lines. Although existing lightweight methods perform well on obvious defects, they struggle with detecting blurred contours and small edge defects in complex backgrounds. This study enhances the YOLOv8 framework by introducing the C2f-WTConv module, which replaces the original C2f block and improves the ability to capture blurred features while reducing the number of parameters by 15.3 %. Additionally, an Efficient Multi-scale Attention (EMA) mechanism is embedded in the neck network to reduce missed detections of small edge defects. The InnerMPDIoU loss function is employed to balance recognition deviations of features and enhance generalization. On the custom SPV-2338 dataset, the proposed YOLOv8-WEIM achieves a mean Average Precision (mAP50) of 83.8 %, representing a 3.3 % increase over the baseline model. Accuracy and recall are improved by 3.1 % and 1.2 %, respectively, while maintaining a frame rate of 118 FPS. Tests on the NEU-DET public dataset further verify the model's generalization capability. The optimized model meets industrial requirements for both speed and accuracy.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"254 ","pages":"Article 123658"},"PeriodicalIF":9.0,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Site suitability assessment for solar powered green hydrogen production plants: A GIS based AHP and Fuzzy AHP approach for Bangladesh 太阳能绿色制氢厂选址适宜性评价：孟加拉国基于GIS的AHP和模糊AHP方法

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-07 DOI: 10.1016/j.renene.2025.123675

Md Tareq Aziz , Akramul Haque , Md Rabiul Islam , Md Biplob Hosen , Zarjes Kader , Md Abdul Aziz , Ovi Ranjan Saha

{"title":"Site suitability assessment for solar powered green hydrogen production plants: A GIS based AHP and Fuzzy AHP approach for Bangladesh","authors":"Md Tareq Aziz , Akramul Haque , Md Rabiul Islam , Md Biplob Hosen , Zarjes Kader , Md Abdul Aziz , Ovi Ranjan Saha","doi":"10.1016/j.renene.2025.123675","DOIUrl":"10.1016/j.renene.2025.123675","url":null,"abstract":"<div><div>The rapid adoption of renewable energy raises concerns about power stability due to their intermittent nature, highlighting the need for a reliable energy supply. Green hydrogen emerges as a promising solution, generated from renewable sources with high energy retention capabilities, making it a key player in transitioning to a fully renewable energy system. The transition to green hydrogen as a sustainable energy source requires identifying optimal locations for production to address both economic and efficiency concerns. This study presents a site suitability assessment for green hydrogen production in Bangladesh using a GIS-based framework that integrates the AHP and fuzzy AHP logic. The proposed methodology evaluates thirteen key factors affecting site suitability the results identify the central region of Bangladesh as highly favorable for establishing large-scale, photovoltaic-powered hydrogen production facilities. Spatial analyses reveal that 43 % and 42 % of this region's surface area is classified as “very high” suitability according to fuzzy AHP and AHP criteria, respectively. These findings provide valuable insights for investors and policymakers by highlighting the potential of Bangladesh's central region for green hydrogen development. The study's framework offers a replicable approach for site selection in similar contexts, supporting the advancement of green hydrogen infrastructure in response to growing global demand.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"254 ","pages":"Article 123675"},"PeriodicalIF":9.0,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Elucidating the water-molecule transport behavior and its effect in photocatalytic hydrogen-producing hydrogels from all-atom molecular dynamics simulations 从全原子分子动力学模拟研究光催化产氢水凝胶中水分子的输运行为及其影响

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-07 DOI: 10.1016/j.renene.2025.123583

Liangyu Li, Zhen Liu, Ronghui Qi

{"title":"Elucidating the water-molecule transport behavior and its effect in photocatalytic hydrogen-producing hydrogels from all-atom molecular dynamics simulations","authors":"Liangyu Li, Zhen Liu, Ronghui Qi","doi":"10.1016/j.renene.2025.123583","DOIUrl":"10.1016/j.renene.2025.123583","url":null,"abstract":"<div><div>Efficient photocatalytic hydrogen production in hydrogel composites depends largely on the transport of water molecules therein. Using all-atom molecular dynamics (MD) simulations, this study elucidated the effects of water distribution and diffusion in polyacrylamide (PAM) hydrogels incorporating ZnIn<sub>2</sub>S<sub>4</sub> (ZIS) nanosheets. The adsorbed water near photocatalysts was focused on and divided into bound water (BW), intermediate water (IW), and free water (FW). Results showed that at low hydration, BW dominates, whereas FW prevails at higher hydration conditions, creating continuous channels that enhance diffusion. The overall diffusion coefficient was found to be the fraction-weighted sum of BW, IW, and FW values, indicating that greater hydration markedly enhances proton and hydrogen mobility. Furthermore, ZIS incorporation elongated polymer chains and enhanced overall water retention, thereby enriching FW around In-centered active sites and underscoring the importance of local water trapping in charge transport. Mechanical analysis further showed the ZIS/PAM composite is over ten times stronger than pristine hydrogel. Particularly, ZIS/PAM hydrogels at 25–50 % water content exhibited rapid proton and hydrogen diffusion alongside favorable mechanical properties, making them suitable for photocatalysis. These atomistic insights provided valuable insights of hydrogel-particle systems, highlighting their potential for efficient hydrogen production and other energy conversion applications.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"254 ","pages":"Article 123583"},"PeriodicalIF":9.0,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Self made electrode empowers electrochemical synergistic anaerobic fermentation treatment of pig manure 自制电极对猪粪进行电化学协同厌氧发酵处理

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-06 DOI: 10.1016/j.renene.2025.123674

Fenghui Wu, Dandan Chen, Qiang Niu, Xuejun Zhu

{"title":"Self made electrode empowers electrochemical synergistic anaerobic fermentation treatment of pig manure","authors":"Fenghui Wu, Dandan Chen, Qiang Niu, Xuejun Zhu","doi":"10.1016/j.renene.2025.123674","DOIUrl":"10.1016/j.renene.2025.123674","url":null,"abstract":"<div><div>The intensive livestock production-derived fecal waste has emerged as a critical bottleneck in modern large scale farming. Conventional biological treatment modalities, including aerobic composting and anaerobic digestion systems, are proving increasingly inadequate to address the exponential growth in waste generation. Electrochemical enhanced fermentation technology has attracted much attention due to its ability to shorten the fermentation cycle. However, electrode corrosion has always been a key limiting factor for the promotion of electrochemical technology. To address this issue, this study employed lead-zinc tailings and waste graphite as raw materials, and prepares electrode materials through densification contact molding technology, explored the strengthening effect and heavy metals removal efficiency on the electrochemical enhanced fermentation system of pig manure. The experimental results shown that electrochemical enhancement of the fermentation cycle shortened the fermentation time by 7 days, the total gas production is increased by 12 %, and the methane production is increased by 2 % under the conditions of self-made electrodes. Meanwhile, It has a significant heavy metals removal effect, with a removal efficiency greater than 95 %, and no corrosion phenomenon of the electrode was found. This discovery compensated for the shortcomings of traditional electrochemical enhanced fermentation technology, improve the fermentation rate, shorten the fermentation time.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"253 ","pages":"Article 123674"},"PeriodicalIF":9.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144229948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

A short-term wind power forecasting method based on evolution-framed fuzzy GANs 基于进化框架模糊gan的短期风电预测方法

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-06 DOI: 10.1016/j.renene.2025.123478

Lingyu Zhao , Fuming Qu , Yaming Ji , Jinhai Liu , Fengyuan Zuo

{"title":"A short-term wind power forecasting method based on evolution-framed fuzzy GANs","authors":"Lingyu Zhao , Fuming Qu , Yaming Ji , Jinhai Liu , Fengyuan Zuo","doi":"10.1016/j.renene.2025.123478","DOIUrl":"10.1016/j.renene.2025.123478","url":null,"abstract":"<div><div>Wind power forecasting is an essential technology for a reliable power system. Although many methods demonstrated good performance in wind power prediction, there is limited research on forecasting under extreme conditions, which pose challenges for wind power generation and management. To address this problem, this paper proposes an evolutionary short-term wind power forecasting method that uses a three-module evolutionary framework to generate and optimize samples in extreme conditions for better model performance. In this framework: first, a supervised deep convolutional generative adversarial network (S-DCGAN) is proposed so that reasonable wind power samples can be generated. Second, a special fuzzy inference system (FIS) is designed according to similarities in wind power correlations, which makes the selected samples more diversified. Third, a statistical method is adopted to identify the required samples. Finally, with this evolutionary framework, the required training samples can be properly generated and the forecasting performance can be greatly improved. Four groups of experiments are conducted to evaluate the proposed method, and models trained using the generated samples by the proposed method improve averaged MAE and RMSE by more than 5% in wind power forecasting. The result of the experiment shows that the proposed method is effective.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"254 ","pages":"Article 123478"},"PeriodicalIF":9.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Powering towards cleaner urban Energy: Integrating PV, reversible fuel cells, and batteries 向更清洁的城市能源迈进：整合光伏、可逆燃料电池和电池

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-06 DOI: 10.1016/j.renene.2025.123662

Rahul Rajeevkumar Urs , Assia Chadly , Osama Mussawar , Max Wei , Ahmad Mayyas

{"title":"Powering towards cleaner urban Energy: Integrating PV, reversible fuel cells, and batteries","authors":"Rahul Rajeevkumar Urs , Assia Chadly , Osama Mussawar , Max Wei , Ahmad Mayyas","doi":"10.1016/j.renene.2025.123662","DOIUrl":"10.1016/j.renene.2025.123662","url":null,"abstract":"<div><div>Designing an efficient renewable energy system is critical for achieving cost-effective energy solutions and minimizing excess generation. This study analyzes the optimization of renewable energy systems with two storage configurations: PV solar with Li-ion Batteries (PV-LIB) and PV solar with a reversible fuel cell (PV-RFC). The system maximizes renewable energy integration by optimizing component sizes to meet the buildings load demand. Results indicate that the PV-LIB system requires a smaller PV array than the PV-RFC system due to the higher roundtrip efficiency of Li-ion batteries. The PV-RFC system achieved a renewable fraction of 95.43 %, while the PV-LIB system reached 95.73 %, with 0.068 % excess energy in the PV-RFC system and none in the PV-LIB system. Monthly energy supply distribution analysis highlights the variability of PV generation and the consistent contribution of storage systems. Cost analysis reveals a levelized cost of hydrogen (LCOH) of $5.17/kg and a levelized cost of energy (LCOE) of $0.166/kWh for the PV-RFC system, compared to an LCOE of $0.071/kWh for the PV-LIB system. The PV-LIB system is more economically viable due to lower capital costs and higher efficiency. Both systems demonstrated lower LCOE compared to local grid electricity tariffs, emphasizing their economic advantage.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"254 ","pages":"Article 123662"},"PeriodicalIF":9.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Environmental impact and water footprint of biofuel production from macro-algae biomass based on life cycle assessment 基于生命周期评估的大型藻类生物燃料生产的环境影响和水足迹

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-06 DOI: 10.1016/j.renene.2025.123612

Feng Tan , Wanming Lu , Bin Cao , Shuang Wang , Mao Mu , Anqing Zheng

{"title":"Environmental impact and water footprint of biofuel production from macro-algae biomass based on life cycle assessment","authors":"Feng Tan , Wanming Lu , Bin Cao , Shuang Wang , Mao Mu , Anqing Zheng","doi":"10.1016/j.renene.2025.123612","DOIUrl":"10.1016/j.renene.2025.123612","url":null,"abstract":"<div><div>Algae, especially macro-algae, are a promising feedstock to produce renewable biofuel, which raises many interests in utilization processes. Focusing on three utilization processes using Enteromorpha clathrata (EN, a kind of macro-algae) as feedstock to produce biofuel, this study evaluates their environmental impacts and water resource consumption. It was found that, among three utilization scenarios, the pyrolysis catalyzed by EN self-derived carbon shows the least global warming potential (8823.73 kg <span><math><mrow><msub><mtext>CO</mtext><mn>2</mn></msub></mrow></math></span> eq/t biofuel) and water resource consumption (206.382 m<sup>3</sup>/t biofuel). The oil production system takes into account operations such as bio-oil hydrogenation upgrading and synthesis gas hydrogen production to enhance system efficiency. However, it was found that the hydrogen was meted by green hydrogen form renewable electricity and the pyrolytic gas directly combusted, GWP and WCP could be reduced by 27 % and 22 % at most, respectively. To comprehensively evaluate the impact on the environment and water consumption, cultivation and raw material processing are carried out separately. The results indicate that Jiangsu Province is the most suitable region for EN oil production. The whole life cycle assessment results of this paper can be used as a reference for the subsequent algal oil production program in China.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"254 ","pages":"Article 123612"},"PeriodicalIF":9.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Advanced cooling strategies for highly concentrated PV-T systems: Confined jet impingement, thermoelectric generator integration with channel configurations 高度集中的PV-T系统的先进冷却策略：受限射流冲击，热电发生器集成与通道配置

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-06 DOI: 10.1016/j.renene.2025.123664

Abhishek Gupta , Sandesh S. Chougule , Sandip K. Saha

{"title":"Advanced cooling strategies for highly concentrated PV-T systems: Confined jet impingement, thermoelectric generator integration with channel configurations","authors":"Abhishek Gupta , Sandesh S. Chougule , Sandip K. Saha","doi":"10.1016/j.renene.2025.123664","DOIUrl":"10.1016/j.renene.2025.123664","url":null,"abstract":"<div><div>The present study focuses on the cooling of a highly concentrated photovoltaic thermal (HCPV-T) system with a hybrid cooling consisting of confined jet impingement cooling and a thermoelectric generator in the presence of a spectral splitter to keep the cell temperature within the permissible limit of 110 °C. The thermoelectric generator module is used to generate extra electrical energy using the waste heat of the HCPV-T system. Channel design involves a central inlet and four outlets at the heat sink corners. The effect of ten distinct channel configurations by varying the fin angle, fin width, and pitch is studied in the present study. The maximum cell temperature is within the permissible limit with channel configurations C4, C5, C7, C8, and C10. The overall performance of the HCPV-T system is optimum with the channel configuration C4 with a 45° fin angle, 9 mm pitch, and 2.5 mm fin width. The generated cell electrical power is 1037.3 W with configuration C4, with a minimal pressure drop of 1423 Pa. The temperature distribution across the cell surface is more uniform with configuration C5. The combined electric power generated by the HCPV-T system and TEG module is highest with configurations C5 and C7. However, the performance evaluation criterion and overall exergy efficiency are maximum with configuration C4. The power generation from waste heat will help increase the system's overall efficiency.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"254 ","pages":"Article 123664"},"PeriodicalIF":9.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Energy performance and optimization of PV vacuum glazing for high-rise office buildings integrating energy storage with time-of-use arranged grid output management 结合储能与分时排网输出管理的高层办公建筑光伏真空玻璃节能性能与优化

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-06 DOI: 10.1016/j.renene.2025.123677

Diqian Luo , Jianxiang Xie , Jiaqi Wu , Jia Liu , Huijun Wu , Jialong Huang

{"title":"Energy performance and optimization of PV vacuum glazing for high-rise office buildings integrating energy storage with time-of-use arranged grid output management","authors":"Diqian Luo , Jianxiang Xie , Jiaqi Wu , Jia Liu , Huijun Wu , Jialong Huang","doi":"10.1016/j.renene.2025.123677","DOIUrl":"10.1016/j.renene.2025.123677","url":null,"abstract":"<div><div>The photovoltaic vacuum glazing (PVVG) is developed as a promising technology for high-rise buildings given its comprehensive thermal, daylighting and electrical performance. This study develops energy evaluation and optimization framework of the PVVG for high-rise buildings integrating robust management strategy and energy storage. Full-scale experiment of the PVVG is performed to explore the thermal-daylighting-electrical performance compared with PV glazing and insulating glazing unit, and their annual energy performance for the high-rise building application is simulated. The transient building energy system with the PVVG is established and optimized promising the time-of-use arranged grid output management strategy integrated with stochastic electric vehicle and battery storage. The results indicate that its average solar heat gain coefficient and U-value is about 0.190 and 1.10 W/(m<sup>2</sup>·K), lower than the PV glazing (0.599, 5.17 W/(m<sup>2</sup>·K)) and insulating glazing unit (0.581, 3.02 W/(m<sup>2</sup>·K)). The annual building demand using the PVVG is reduced by 12.37 % compared to the PV glazing, with additional 566.47 MWh of power generation. The multi-objective optimization improves the energy system performance (−34.6 % in grid robustness, −6.35 % in lifetime economy, −2.2 % in carbon emission). The energy performance evaluation and optimization of the PVVG provides essential references to develop low-energy buildings in urban areas.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"254 ","pages":"Article 123677"},"PeriodicalIF":9.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Performance analysis of a scramjet engine thermoelectric conversion system using the SCO2 closed Brayton cycle 基于SCO2封闭Brayton循环的超燃冲压发动机热电转换系统性能分析

IF 9 1区工程技术

Renewable Energy Pub Date : 2025-06-06 DOI: 10.1016/j.renene.2025.123606

Qianqian Luo, Lei Luo, Haifeng Xing, Wei Du, Han Yan

{"title":"Performance analysis of a scramjet engine thermoelectric conversion system using the SCO2 closed Brayton cycle","authors":"Qianqian Luo, Lei Luo, Haifeng Xing, Wei Du, Han Yan","doi":"10.1016/j.renene.2025.123606","DOIUrl":"10.1016/j.renene.2025.123606","url":null,"abstract":"<div><div>This study presents a thermoelectric conversion system (TCS) for a scramjet engine, based on the supercritical carbon dioxide (SCO<sub>2</sub>) closed Brayton cycle (CBC). A coupled model is developed, integrating the scramjet engine's combustion chamber, wall cooling channels, and the SCO<sub>2</sub> CBC. The system's performance is analyzed under a free-stream Mach number of 7.7, with compressor outlet pressure (<em>p</em><sub><em>C</em>,<em>out</em></sub>) varying from 17.5 MPa to 30 MPa, while considering the impact of working fluid mass flow rate (<em>m</em>) and recompression split ratio (<em>x</em><sub><em>RC</em></sub>). The results indicate that there are crossover points in the performance between the regenerative CBC (Reg.CBC) and recompression CBC (Rec.CBC) as <em>p</em><sub><em>C</em>,<em>out</em></sub> varies. Specifically, when <em>p</em><sub><em>C</em>,<em>out</em></sub> is below a certain threshold, the Reg.CBC performs better, while the Rec.CBC achieves superior performance when <em>p</em><sub><em>C</em>,<em>out</em></sub> exceeds this value. Within the parameter range studied, the optimal performance for the Reg.CBC corresponds to a thermal efficiency (<em>η</em><sub><em>th</em></sub>) of 32.33 %, net power (<em>P</em><sub><em>net</em></sub>) of 492.01 kW, and cooling fuel mass flow rate (<em>m</em><sub><em>fc</em></sub>) of 0.490 kg/s. The optimal performance for the Rec.CBC corresponds to a <em>η</em><sub><em>th</em></sub> of 35.65 %, <em>P</em><sub><em>net</em></sub> of 541.12 kW, and <em>m</em><sub><em>fc</em></sub> of 0.471 kg/s.</div></div>","PeriodicalId":419,"journal":{"name":"Renewable Energy","volume":"254 ","pages":"Article 123606"},"PeriodicalIF":9.0,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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