Pub Date : 2024-09-01DOI: 10.1088/1742-6596/2838/1/012012
Yi Feng, Ruitang Guo, Zhongzhu Qiu
ZnIn2S4 (ZIS)’s superior photocatalytic CO2 reduction efficacy, coupled with its distinct layered architecture and narrow energy band profile, makes it an intriguing target for CO2 conversion studies. This article evaluates the photogenerated charge transfer mechanism and photocatalytic CO2 reduction (PCR) efficacy of varied ZIS-based heterostructure catalysts. ZIS-based heterojunctions are initially classified, ensuing discourse on advanced engineering techniques enhancing heterojunction phot catalysts’ PCR functionality like co-catalyst incorporation and morphologic manipulation. The concluding section provides an overview of the present study state and future progression in regard to ZIS-based heterostructured photocatalysts for PCR.
{"title":"ZnIn2S4-based heterostructured photocatalysts for CO2 reduction: A mini review","authors":"Yi Feng, Ruitang Guo, Zhongzhu Qiu","doi":"10.1088/1742-6596/2838/1/012012","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012012","url":null,"abstract":"ZnIn<sub>2</sub>S<sub>4</sub> (ZIS)’s superior photocatalytic CO<sub>2</sub> reduction efficacy, coupled with its distinct layered architecture and narrow energy band profile, makes it an intriguing target for CO<sub>2</sub> conversion studies. This article evaluates the photogenerated charge transfer mechanism and photocatalytic CO<sub>2</sub> reduction (PCR) efficacy of varied ZIS-based heterostructure catalysts. ZIS-based heterojunctions are initially classified, ensuing discourse on advanced engineering techniques enhancing heterojunction phot catalysts’ PCR functionality like co-catalyst incorporation and morphologic manipulation. The concluding section provides an overview of the present study state and future progression in regard to ZIS-based heterostructured photocatalysts for PCR.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1088/1742-6596/2838/1/012035
Jianyang Fang, Yusheng Ju, Liwei Mao, Shichao Pei
To conduct an in-depth study of the injection characteristics of gas fuels, the structural parameters of the nozzle are optimized. Utilizing the Response Surface Method (RSM), this study selects an inlet radius R1, outlet radius R2, throat straight radius R0, expansion half angle θ, and contraction half angle α as design parameters. Based on the validated numerical model, a response surface prediction model for outlet velocity v and mass flow rate Q is established. Using the derived expressions, the contribution and interactive effects of design variables on response variables are analyzed. The findings indicate that the outlet radius and throat radius significantly affect the outlet velocity. The outlet radius positively correlates with the outlet velocity, while the throat radius negatively correlates with it. The mass flow rate is most significantly influenced by the throat radius, increasing with its increase. With outlet velocity and mass flow rate as optimization objectives, the MOGA algorithm is applied for multi-objective optimization. The optimization results indicate that the optimized structural parameters increased the centrifugal nozzle’s atomization cone angle and mass flow rate by 1.86% and 27.4%, respectively.
{"title":"Optimization design of hydrogen Laval nozzle based on response surface methodology (RSM)","authors":"Jianyang Fang, Yusheng Ju, Liwei Mao, Shichao Pei","doi":"10.1088/1742-6596/2838/1/012035","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012035","url":null,"abstract":"To conduct an in-depth study of the injection characteristics of gas fuels, the structural parameters of the nozzle are optimized. Utilizing the Response Surface Method (RSM), this study selects an inlet radius <italic toggle=\"yes\">R<sub>1</sub></italic>, outlet radius <italic toggle=\"yes\">R<sub>2</sub></italic>, throat straight radius <italic toggle=\"yes\">R<sub>0</sub></italic>, expansion half angle <italic toggle=\"yes\">θ</italic>, and contraction half angle <italic toggle=\"yes\">α</italic> as design parameters. Based on the validated numerical model, a response surface prediction model for outlet velocity <italic toggle=\"yes\">v</italic> and mass flow rate <italic toggle=\"yes\">Q</italic> is established. Using the derived expressions, the contribution and interactive effects of design variables on response variables are analyzed. The findings indicate that the outlet radius and throat radius significantly affect the outlet velocity. The outlet radius positively correlates with the outlet velocity, while the throat radius negatively correlates with it. The mass flow rate is most significantly influenced by the throat radius, increasing with its increase. With outlet velocity and mass flow rate as optimization objectives, the MOGA algorithm is applied for multi-objective optimization. The optimization results indicate that the optimized structural parameters increased the centrifugal nozzle’s atomization cone angle and mass flow rate by 1.86% and 27.4%, respectively.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1088/1742-6596/2838/1/012009
Yuqi Sun, Yuanbo Wang
Bone defects due to the older population, severe trauma, congenital malformations, resection of bone tumors, and infections are serious problems faced in orthopedic clinical treatment, posing great hazards to human health and life, and external interventions are generally required to promote bone healing. Considering the osteogenic promotion of calcium ions, Ca-POM nanowires were synthesized in this study to facilitate the osteogenesis process through the release of calcium ions. The cytotoxicity test showed that the material possesses good biocompatibility. Furthermore, the Alizarin Red S staining demonstrated that the material could promote osteogenesis, indicating its potential as an ideal candidate for bone repair.
老年人群、严重创伤、先天畸形、骨肿瘤切除、感染等导致的骨缺损是骨科临床治疗中面临的严重问题，对人体健康和生命造成极大危害，一般需要通过外力干预来促进骨愈合。考虑到钙离子的成骨促进作用，本研究合成了 Ca-POM 纳米线，通过释放钙离子促进成骨过程。细胞毒性测试表明，该材料具有良好的生物相容性。此外，茜素红 S 染色结果表明，该材料可促进骨生成，表明其有潜力成为骨修复的理想候选材料。
{"title":"Calcium-based nanowires for bone repair","authors":"Yuqi Sun, Yuanbo Wang","doi":"10.1088/1742-6596/2838/1/012009","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012009","url":null,"abstract":"Bone defects due to the older population, severe trauma, congenital malformations, resection of bone tumors, and infections are serious problems faced in orthopedic clinical treatment, posing great hazards to human health and life, and external interventions are generally required to promote bone healing. Considering the osteogenic promotion of calcium ions, Ca-POM nanowires were synthesized in this study to facilitate the osteogenesis process through the release of calcium ions. The cytotoxicity test showed that the material possesses good biocompatibility. Furthermore, the Alizarin Red S staining demonstrated that the material could promote osteogenesis, indicating its potential as an ideal candidate for bone repair.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"144 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1088/1742-6596/2838/1/012020
Kanglu Chang, Xumei Tao
Thermo-catalytic and photo-assisted thermo-catalytic are two effective pathways for conversion of glucose. Thermo-catalytic and photo-assisted thermo-catalytic conversion of glucose was studied with Cr-MOFs@ZrO2 as catalysts in nitrogen atmosphere at 150 °C. Cr-MOFs@ZrO2 possesses simultaneously Lewis acid sites as well as Brønsted acid sites, and also has strong Brønsted acidity, so it can exhibit good thermos-catalytic performanc. When the glucose was 3 g/L, the reaction was carried out at 150 °C for 2 h with DMF as solvent, the glucose conversion was 97.9% while the HMF yield was 38%. The yield of HMF can be increased to 51.1% by adding 500w xenon lamp irradiation on the basis of thermal catalytic reaction condition. A comparison of the two reactions revealed that light-assisted thermal catalysis was more favorable for the reaction.
{"title":"Comparison of thermo-catalytic and photo-assisted thermo-catalytic conversion of glucose to HMF with Cr-MOFs@ZrO2","authors":"Kanglu Chang, Xumei Tao","doi":"10.1088/1742-6596/2838/1/012020","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012020","url":null,"abstract":"Thermo-catalytic and photo-assisted thermo-catalytic are two effective pathways for conversion of glucose. Thermo-catalytic and photo-assisted thermo-catalytic conversion of glucose was studied with Cr-MOFs@ZrO<sub>2</sub> as catalysts in nitrogen atmosphere at 150 °C. Cr-MOFs@ZrO<sub>2</sub> possesses simultaneously Lewis acid sites as well as Brønsted acid sites, and also has strong Brønsted acidity, so it can exhibit good thermos-catalytic performanc. When the glucose was 3 g/L, the reaction was carried out at 150 °C for 2 h with DMF as solvent, the glucose conversion was 97.9% while the HMF yield was 38%. The yield of HMF can be increased to 51.1% by adding 500w xenon lamp irradiation on the basis of thermal catalytic reaction condition. A comparison of the two reactions revealed that light-assisted thermal catalysis was more favorable for the reaction.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1088/1742-6596/2838/1/012019
Jiaojiao Zhang, Minghang Lv, Fuli Li, Zhe Wang, Xinyu Liu
Co-pyrolysis of biomass and coal has attracted much attention as a potential energy conversion technology. In this paper, the significant effects of n-hexane insoluble substance (INS) on tar, water, and coke residue yields were analyzed in depth using statistical analysis. With INS and mixing ratio as independent variables, multivariate analysis of variance (ANOVA) was used to comprehensively investigate the effects of the interaction between the two on the yields of different pyrolysis products, revealing the significant interaction between different pyrolysis products. The genetic algorithm was used to establish an optimization model to optimize the mixing ratios of the co-pyrolysis, and the considerable differences between the experimental and theoretically calculated values of the product yields of the co-pyrolysis compounds were analyzed by statistical tests, and subgroup analyses were carried out to determine the specific differences under different mixing ratios. CNN prediction model was established, and model optimization confirmed the differences between the experimental and theoretically calculated values for different pyrolytic coupling ratio-specific ratios by data validation and subgroup analysis. The further extension and optimization of the model provide a new theoretical basis and idea for further research on the co-pyrolysis of biomass and coal, which can help to improve the energy conversion efficiency and product quality.
生物质和煤的联合热解作为一种潜在的能源转换技术备受关注。本文采用统计分析方法深入分析了正己烷不溶物（INS）对焦油、水和焦炭残渣产量的显著影响。以 INS 和混合比为自变量，采用多元方差分析（ANOVA）全面考察了两者之间的交互作用对不同热解产物产率的影响，揭示了不同热解产物之间的显著交互作用。利用遗传算法建立了优化模型，对共热解的混合比进行了优化，通过统计检验分析了共热解化合物产物产率的实验值与理论计算值之间存在的较大差异，并进行了分组分析，确定了不同混合比下的具体差异。建立了 CNN 预测模型，并通过数据验证和分组分析对模型进行了优化，确认了不同热解耦合比特定比例下实验值和理论计算值之间的差异。该模型的进一步扩展和优化为生物质与煤协同热解的进一步研究提供了新的理论依据和思路，有助于提高能源转化效率和产品质量。
{"title":"Research on the co-pyrolysis of biomass and coal","authors":"Jiaojiao Zhang, Minghang Lv, Fuli Li, Zhe Wang, Xinyu Liu","doi":"10.1088/1742-6596/2838/1/012019","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012019","url":null,"abstract":"Co-pyrolysis of biomass and coal has attracted much attention as a potential energy conversion technology. In this paper, the significant effects of n-hexane insoluble substance (INS) on tar, water, and coke residue yields were analyzed in depth using statistical analysis. With INS and mixing ratio as independent variables, multivariate analysis of variance (ANOVA) was used to comprehensively investigate the effects of the interaction between the two on the yields of different pyrolysis products, revealing the significant interaction between different pyrolysis products. The genetic algorithm was used to establish an optimization model to optimize the mixing ratios of the co-pyrolysis, and the considerable differences between the experimental and theoretically calculated values of the product yields of the co-pyrolysis compounds were analyzed by statistical tests, and subgroup analyses were carried out to determine the specific differences under different mixing ratios. CNN prediction model was established, and model optimization confirmed the differences between the experimental and theoretically calculated values for different pyrolytic coupling ratio-specific ratios by data validation and subgroup analysis. The further extension and optimization of the model provide a new theoretical basis and idea for further research on the co-pyrolysis of biomass and coal, which can help to improve the energy conversion efficiency and product quality.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"399 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The non-transposition erection of transmission lines will lead to the imbalance of electrical parameters, which will affect the protection and automatic reclosing. The best phase sequence arrangement is determined by comprehensively considering the comprehensive indexes (current imbalance, secondary current, and recovery voltage) of double transmission un-transposed lines with shared towers. PSCAD/EMTDC electromagnetic transient simulation software is applied to build a typical 750kV transmission line model for simulation analysis, and the comprehensive indexes under different phase sequence arrangements are studied. The analysis reveals that the arrangement of phase sequence exerts a significant consequence of the comprehensive index. The findings indicate that the margin and different secondary current and recovery voltage indexes, double transmission un-transposed lines with shared towers can be erected in the same direction or in different phase sequences to reduce the current imbalance.
{"title":"Phase sequence selection method of double-circuit transmission lines on the same tower based on a comprehensive index","authors":"Xiaoyan Lu, Jianqiao Hu, Zhengwei Peng, Peihua Ma, Kun Zhang, Feng Gao","doi":"10.1088/1742-6596/2838/1/012039","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012039","url":null,"abstract":"The non-transposition erection of transmission lines will lead to the imbalance of electrical parameters, which will affect the protection and automatic reclosing. The best phase sequence arrangement is determined by comprehensively considering the comprehensive indexes (current imbalance, secondary current, and recovery voltage) of double transmission un-transposed lines with shared towers. PSCAD/EMTDC electromagnetic transient simulation software is applied to build a typical 750kV transmission line model for simulation analysis, and the comprehensive indexes under different phase sequence arrangements are studied. The analysis reveals that the arrangement of phase sequence exerts a significant consequence of the comprehensive index. The findings indicate that the margin and different secondary current and recovery voltage indexes, double transmission un-transposed lines with shared towers can be erected in the same direction or in different phase sequences to reduce the current imbalance.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1088/1742-6596/2838/1/012021
Dingyu Kang, Duo Sun, Zixun Yao, Zhongzhi Zhang, Zhiyong Zhang
The efficacy of microbial-enhanced oil recovery (MEOR) is contingent upon the performance of oil recovery functional bacteria. The optimization of the nutrient system for oil recovery functional bacteria can enhance their performance. In this study, the nutrient systems of the strains underwent screening and optimization procedures, utilizing single-factor combined with response surface methodology. Subsequently, field trials were conducted to assess the efficacy of MEOR. The results indicated that the carbon source in the nutrient system was sucrose, the nitrogen source was NaNO3, and the phosphorus source was a combination of KH2PO4 and Na2HPO4 (in a 1:1 ratio). The combination of the results from the single-factor experiments and the response surface experiment led to the following formulation for the strain F-T nutrient system (g/L): sucrose 10.0, NaNO3 2.0, KH2PO4 1.5, Na2HPO4 1.5, CaCl2 0.12, FeSO4 0.12, MgSO4·7H2O 0.2, Na2MoO4 0.08, yeast powder 1.0, and pH 7.2-7.5. The optimized F-T bacterium has the potential to spread oil up to a diameter of 40.50 mm. The results of the MEOR field trial indicated a 2.95 × 10 t increase in oil production, with a success rate of 83.87%. Following the implementation of MEOR, production levels were observed to decline to levels comparable to those observed prior to the intervention. This indicates that continued MEOR field applications may be necessary to further enhance crude oil recovery.
{"title":"Optimization of Bacillus licheniformis’ nutrient system and oilfield trial for MEOR","authors":"Dingyu Kang, Duo Sun, Zixun Yao, Zhongzhi Zhang, Zhiyong Zhang","doi":"10.1088/1742-6596/2838/1/012021","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012021","url":null,"abstract":"The efficacy of microbial-enhanced oil recovery (MEOR) is contingent upon the performance of oil recovery functional bacteria. The optimization of the nutrient system for oil recovery functional bacteria can enhance their performance. In this study, the nutrient systems of the strains underwent screening and optimization procedures, utilizing single-factor combined with response surface methodology. Subsequently, field trials were conducted to assess the efficacy of MEOR. The results indicated that the carbon source in the nutrient system was sucrose, the nitrogen source was NaNO<sub>3</sub>, and the phosphorus source was a combination of KH<sub>2</sub>PO<sub>4</sub> and Na<sub>2</sub>HPO<sub>4</sub> (in a 1:1 ratio). The combination of the results from the single-factor experiments and the response surface experiment led to the following formulation for the strain F-T nutrient system (g/L): sucrose 10.0, NaNO<sub>3</sub> 2.0, KH<sub>2</sub>PO<sub>4</sub> 1.5, Na<sub>2</sub>HPO<sub>4</sub> 1.5, CaCl<sub>2</sub> 0.12, FeSO<sub>4</sub> 0.12, MgSO<sub>4</sub>·7H2O 0.2, Na<sub>2</sub>MoO<sub>4</sub> 0.08, yeast powder 1.0, and pH 7.2-7.5. The optimized F-T bacterium has the potential to spread oil up to a diameter of 40.50 mm. The results of the MEOR field trial indicated a 2.95 × 10 t increase in oil production, with a success rate of 83.87%. Following the implementation of MEOR, production levels were observed to decline to levels comparable to those observed prior to the intervention. This indicates that continued MEOR field applications may be necessary to further enhance crude oil recovery.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1088/1742-6596/2838/1/012034
Yuantian Xue, Changcheng Song, Chenlai Yang
In order to improve the accuracy of the prediction of the erosion phenomenon of wind turbine blade coatings, this study incorporates the wind-sand erosion data of wind turbine blade coating flat specimens obtained through wind tunnel experiments on the basis of the widely used generalized erosion model. A prediction model that accurately reflects the erosion and wear characteristics of wind turbine blade coatings is constructed using the least squares method. All the function parts included in the model showed favorable fitting effects, and the error between the model prediction results and the measured data was limited to a tolerable range. Therefore, the model has proved to be effective in predicting the erosion rate of wind turbine blade coating materials, which provides a solid theoretical foundation for the numerical simulation of the erosion and wear of wind turbine blades in a two-phase wind-sand flow environment.
{"title":"Research on wind turbine blade coating erosion modeling based on Generic modeling","authors":"Yuantian Xue, Changcheng Song, Chenlai Yang","doi":"10.1088/1742-6596/2838/1/012034","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012034","url":null,"abstract":"In order to improve the accuracy of the prediction of the erosion phenomenon of wind turbine blade coatings, this study incorporates the wind-sand erosion data of wind turbine blade coating flat specimens obtained through wind tunnel experiments on the basis of the widely used generalized erosion model. A prediction model that accurately reflects the erosion and wear characteristics of wind turbine blade coatings is constructed using the least squares method. All the function parts included in the model showed favorable fitting effects, and the error between the model prediction results and the measured data was limited to a tolerable range. Therefore, the model has proved to be effective in predicting the erosion rate of wind turbine blade coating materials, which provides a solid theoretical foundation for the numerical simulation of the erosion and wear of wind turbine blades in a two-phase wind-sand flow environment.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-01DOI: 10.1088/1742-6596/2838/1/012022
Aixin Yang, Chunxia Zhang
Solar air heaters (SAHs) exhibited low thermal performance due to air thermal properties. To optimize the convective heat transfer between air and the absorber plate, researchers designed plenty of enhanced structures based on experimental and numerical analysis. This article reviewed the improvement methods of SAHs and emphasized the crucial role of thermodynamic models and evaluation criteria. Current research focuses on improving the convective heat transfer coefficient. In terms of enhanced structures, using flow deflectors, flow disruptors, corrugated absorber plates, and porous media improved collection efficiency. This result showed these enhanced structures could effectively further the performance of SAHs and provide new ways for sustainable energy utilization.
{"title":"Enhanced heat transfer technology for solar air heaters","authors":"Aixin Yang, Chunxia Zhang","doi":"10.1088/1742-6596/2838/1/012022","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012022","url":null,"abstract":"Solar air heaters (SAHs) exhibited low thermal performance due to air thermal properties. To optimize the convective heat transfer between air and the absorber plate, researchers designed plenty of enhanced structures based on experimental and numerical analysis. This article reviewed the improvement methods of SAHs and emphasized the crucial role of thermodynamic models and evaluation criteria. Current research focuses on improving the convective heat transfer coefficient. In terms of enhanced structures, using flow deflectors, flow disruptors, corrugated absorber plates, and porous media improved collection efficiency. This result showed these enhanced structures could effectively further the performance of SAHs and provide new ways for sustainable energy utilization.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Steel tubular offshore platforms are exposed to aggressive marine conditions, which leads to inevitable corrosion and degradation of the structures after a long time of service. Repairing the corroded tubular structure is not easy, especially for the members that are beneath the sea level. The current paper aims to provide an alternative approach for the repairing of corroded steel tubular platforms, by which a novel method with grout-filled GFRP tube cladding the tubular members is proposed. The conception design of the method is introduced, and the repairing process is demonstrated in detail. Then the repairing efficiency of repaired joints and platforms with different corrosion rates is investigated with finite element analysis, which proves a satisfactory reinforcement on the strength of them. The enhanced ratio is up to 117% for the T-joint under compression, and 44% for the compression brace of the K-joint, 37% for the tension brace of the K-joint, 45% for the platform. Finite element models are developed to explore the influence of the GFRP tube thickness ratio and the cube strength of grout material on its strength and repair efficiency. Then the corresponding repair structure suggestions under each corrosion rate are put forward.
{"title":"Finite element analysis of grout-filled GFRP tube repaired corroded tubular offshore platforms","authors":"Yaping Lu, Yongli Zhou, Xiaoyu Yan, Ziyang Meng, Xiaoyu Hou","doi":"10.1088/1742-6596/2838/1/012017","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012017","url":null,"abstract":"Steel tubular offshore platforms are exposed to aggressive marine conditions, which leads to inevitable corrosion and degradation of the structures after a long time of service. Repairing the corroded tubular structure is not easy, especially for the members that are beneath the sea level. The current paper aims to provide an alternative approach for the repairing of corroded steel tubular platforms, by which a novel method with grout-filled GFRP tube cladding the tubular members is proposed. The conception design of the method is introduced, and the repairing process is demonstrated in detail. Then the repairing efficiency of repaired joints and platforms with different corrosion rates is investigated with finite element analysis, which proves a satisfactory reinforcement on the strength of them. The enhanced ratio is up to 117% for the T-joint under compression, and 44% for the compression brace of the K-joint, 37% for the tension brace of the K-joint, 45% for the platform. Finite element models are developed to explore the influence of the GFRP tube thickness ratio and the cube strength of grout material on its strength and repair efficiency. Then the corresponding repair structure suggestions under each corrosion rate are put forward.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"144 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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