Clean Energy Science and Technology最新文献

Polymeric field synergy principle: Revealing the intrinsic mechanism of screw channel optimization to enhance thermal management and process efficiency 聚合场协同原理：揭示螺旋通道优化的内在机制，提高热管理和工艺效率

Clean Energy Science and Technology Pub Date : 2024-04-10 DOI: 10.18686/cest.v2i2.134

Wei Pan, Shizheng Huang, Jiawei Zhu, Xiankui Zeng, Weimin Yang, Ranran Jian

{"title":"Polymeric field synergy principle: Revealing the intrinsic mechanism of screw channel optimization to enhance thermal management and process efficiency","authors":"Wei Pan, Shizheng Huang, Jiawei Zhu, Xiankui Zeng, Weimin Yang, Ranran Jian","doi":"10.18686/cest.v2i2.134","DOIUrl":"https://doi.org/10.18686/cest.v2i2.134","url":null,"abstract":"The process efficiency and energy efficiency of extrusion equipment emerge as pivotal challenges constraining the development of the polymer extrusion industry. This article presents a new principle of polymeric field synergy to guide the solution to the low mixing efficiency and energy utilization efficiency of traditional extrusion equipment. Finite element analysis was conducted on four novel unconventional screw configurations and compared with the traditional single-thread screw. Results revealed that more complicated melt flow patterns generated in the modified novel screw configurations enhanced the stretching deformation or helical flow. The stretching or helical flows to varying degrees during the melt extrusion process thereby improved the mixing and heat transport efficiency. Among them, helical flow induced by the Maddock element exhibited the most significant impact on stretching flow and ductile deformation in the flow field. Simultaneously, the helical flow caused radial motion of the internal material, significantly promoting the synergy between the velocity field, velocity gradient field, and temperature gradient field. This enhanced radial heat and mass transport efficiency within the screw channel, subsequently improving the overall operational efficiency of the equipment. The results of the finite element analysis have substantiated the scientific validity of the polymeric field synergy principle.","PeriodicalId":504271,"journal":{"name":"Clean Energy Science and Technology","volume":"2003 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140718700","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}

引用次数: 0

Editorial for Clean Energy Science and Technology (Volume 2, Issue 1) 为《清洁能源科学与技术》（第 2 卷第 1 期）撰写的社论

Clean Energy Science and Technology Pub Date : 2024-04-07 DOI: 10.18686/cest.v2i1.165

Weimin Yang

引用次数: 0

A review of cold plasma for catalyst synthesis and modification 用于催化剂合成和改性的冷等离子体综述

Clean Energy Science and Technology Pub Date : 2024-03-29 DOI: 10.18686/cest.v2i1.131

Qingbin Tian, Lansen Bi, Shuyan Lin, Jiang-Shan Gao, Yan He

引用次数: 0

Hydrogen-electricity coupling energy storage systems: Models, applications, and deep reinforcement learning algorithms 氢电耦合储能系统：模型、应用和深度强化学习算法

Clean Energy Science and Technology Pub Date : 2024-03-05 DOI: 10.18686/cest.v2i1.96

Jiehui Zheng, Yingying Su, Wenhao Wang, Zhigang Li, Qinghua Wu

{"title":"Hydrogen-electricity coupling energy storage systems: Models, applications, and deep reinforcement learning algorithms","authors":"Jiehui Zheng, Yingying Su, Wenhao Wang, Zhigang Li, Qinghua Wu","doi":"10.18686/cest.v2i1.96","DOIUrl":"https://doi.org/10.18686/cest.v2i1.96","url":null,"abstract":"With the maturity of hydrogen storage technologies, hydrogen-electricity coupling energy storage in green electricity and green hydrogen modes is an ideal energy system. The construction of hydrogen-electricity coupling energy storage systems (HECESSs) is one of the important technological pathways for energy supply and deep decarbonization. In a HECESS, hydrogen storage can maintain the energy balance between supply and demand and increase the utilization efficiency of energy. However, its scenario models in power system establishment and the corresponding solution methods still need to be studied in depth. For accelerating the construction of HECESSs, firstly, this paper describes the current applications of hydrogen storage technologies from three aspects: hydrogen production, hydrogen power generation, and hydrogen storage. Secondly, based on the complementary synergistic mechanism of hydrogen energy and electric energy, the structure of the HECESS and its operation mode are described. To study the engineering applications of HECESSs more deeply, the recent progress of HECESS application at the source, grid, and load sides is reviewed. For the application of the models of hydrogen storage at the source/grid/load side, the selection of the solution method will affect the optimal solution of the model and solution efficiency. As solving complex multi-energy coupling models using traditional optimization methods is difficult, the paper therefore explored the advantages of deep reinforcement learning (DRL) algorithms and their applications in HECESSs. Finally, the technical application in the construction of new power systems supported by HECESSs is prospected. The study aims to provide a reference for the research on hydrogen storage in power systems.","PeriodicalId":504271,"journal":{"name":"Clean Energy Science and Technology","volume":"106 26","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140079558","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}

引用次数: 0

Catalyzed hydrothermal treatment of oily sludge: A review 催化水热处理含油污泥：综述

Clean Energy Science and Technology Pub Date : 2024-02-29 DOI: 10.18686/cest.v2i1.107

Jie Zhang, Lingling Zhang, Hulin Li, Xinyue Tian, Rongpu Huang, Jinling Lu

{"title":"Catalyzed hydrothermal treatment of oily sludge: A review","authors":"Jie Zhang, Lingling Zhang, Hulin Li, Xinyue Tian, Rongpu Huang, Jinling Lu","doi":"10.18686/cest.v2i1.107","DOIUrl":"https://doi.org/10.18686/cest.v2i1.107","url":null,"abstract":"Oily sludge is a common by-product of the petroleum exploration industry, which is rich in resources and has strong toxicity. It is categorized as hazardous waste in many nations worldwide. Owing to the distinct physical and chemical characteristics of sub/supercritical water, the application of hydrothermal conversion technology, which uses sub/supercritical water as a medium, has been growing in the utilization of resources and the safe disposal of oily sludge. In this article, the research on the oxygen-free hydrothermal transformation of oil sludge, including hydrothermal carbonization, hydrothermal liquefaction, hydrothermal upgrading, and supercritical water gasification, is reviewed. Due to the significant impact of nitrogenous and sulfurous compounds in sludge on hydrothermal conversion products, the hydrogenation conversion, reaction path, and kinetics for these two compounds were discussed. Finally, a summary and comparison of the studies conducted on carriers and catalysts in hydrothermal processes are provided. This review can offer recommendations for future studies, as well as guidance for the hydrothermal catalytic treatment of oily sludge.","PeriodicalId":504271,"journal":{"name":"Clean Energy Science and Technology","volume":"17 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140414249","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}

引用次数: 0

Hygroscopic all-polymer composite for moisture management and evaporative cooling 吸湿性全聚合物复合材料，用于湿度管理和蒸发冷却

Clean Energy Science and Technology Pub Date : 2024-02-28 DOI: 10.18686/cest.v2i1.111

Yan-Xin Gao, Yang Li, Xiao Chen

引用次数: 0

Editorial for Clean Energy Science and Technology (Volume 1 Issue 2) 为《清洁能源科学与技术》（第 1 卷第 2 期）撰写的社论

Clean Energy Science and Technology Pub Date : 2024-01-26 DOI: 10.18686/cest.v1i2.124

Xianfeng Fan

引用次数: 0

Flue gas CO2 supply methods for microalgae utilization: A review 微藻利用的烟气二氧化碳供应方法：综述

Clean Energy Science and Technology Pub Date : 2023-12-25 DOI: 10.18686/cest.v1i2.78

Xiaosu Yu, Wangbiao Guo, Zhan Hu, Pengcheng Li, Zhuowei (Amanda) Zhang, Jun Cheng, Chunfeng Song, Qing Ye

{"title":"Flue gas CO2 supply methods for microalgae utilization: A review","authors":"Xiaosu Yu, Wangbiao Guo, Zhan Hu, Pengcheng Li, Zhuowei (Amanda) Zhang, Jun Cheng, Chunfeng Song, Qing Ye","doi":"10.18686/cest.v1i2.78","DOIUrl":"https://doi.org/10.18686/cest.v1i2.78","url":null,"abstract":"The potential for utilizing flue gas as a carbon source in microalgal cultivation holds great promise. Incorporating flue gas as a carbon source into microalgae culture processes can accelerate the growth rate of microalgae, consequently enhancing the overall economic viability of the integrated process. There are two key sources of flue gas to consider: flue gas from coal-fired power plants, characterized by a CO2 concentration of 12–15 w/w%, and flue gas from coal chemical processes, boasting a CO2 concentration of 90–99 w/w%. Additionally, the choice between an open or sealed microalgae culture system can also influence economic efficiency. Thus, there are four distinct microalgal cultivation routes to assess: in-situ open systems, off-situ open systems, in-situ sealed systems, and off-situ sealed systems. The incorporation of flue gas as a carbon source in microalgae cultivation demonstrates significant potential for reducing both environmental impact and costs, rendering it a highly promising and sustainable approach for economically efficient microalgae cultivation. In this review, the in-situ open route is recommended for the situation with high flue gas CO2 concentration and the target products of low-margin commodities, while the off-situ sealed route is suitable for the situation with low flue gas CO2 concentration and the target products of high value-added products.","PeriodicalId":504271,"journal":{"name":"Clean Energy Science and Technology","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139159485","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}

引用次数: 0

3D-printed stretchable conductive polymer composites with nano-carbon fillers for multifunctional applications 含有纳米碳填料的 3D 打印可拉伸导电聚合物复合材料的多功能应用

Clean Energy Science and Technology Pub Date : 2023-11-24 DOI: 10.18686/cest.v1i2.84

Chenpeng Zhao, Ruqing Li, Biao Fang, Rui Wang, Han Liang, Lei Wang, Ruilin Wu, Yunan Wei, Zhangyuan Wang, Zhipeng Su, Runwei Mo

引用次数: 0

Chemical pretreatment in lignocellulosic biomass, anaerobic digestion, and biomethanation 木质纤维素生物质的化学预处理、厌氧消化和生物甲烷化

Clean Energy Science and Technology Pub Date : 2023-11-20 DOI: 10.18686/cest.v1i2.70

Erick Auma Omondi, Arnold Aluda Kegode

{"title":"Chemical pretreatment in lignocellulosic biomass, anaerobic digestion, and biomethanation","authors":"Erick Auma Omondi, Arnold Aluda Kegode","doi":"10.18686/cest.v1i2.70","DOIUrl":"https://doi.org/10.18686/cest.v1i2.70","url":null,"abstract":"The current impacts of climate change necessitate the promotion and use of renewable energy sources to avert the growing environmental and health concerns emanating from fossil fuels. Lignocellulosic biomass (LCB) is a promising, renewable, and sustainable energy source based on its abundance and feedstock properties. Anaerobic digestion (AD) involves a biochemical process that can convert LCB to biogas through hydrolysis and biomethanation processes through the action of microorganisms such as methanogens and sulfate-reducing bacteria. The hydrolysis of LCB releases various reducing sugars, which are essential in the production of biofuels such as bioethanol and biogas, organic acids, phenols, and aldehydes. The resultant biogas can complement energy needs while achieving economic, environmental, and health benefits. Enhancement of the AD process for LCB to bioenergy can be realized through appropriate pretreatment capable of disrupting the complex lignocellulosic structure and freeing cellulose and hemicellulose from the binding lignin for enzymatic saccharification and fermentation. Determining the optimal pretreatment technique for AD is critical for the success of the LCB energy production process. This study evaluated the application of chemical pretreatment to the improvement of LCB digestion for bioenergy production. The study reviews the LCB characteristics, AD processes, and the role of various chemical pretreatment techniques such as acid, alkali, organosolv, ozonolysis, and ionic fluids. The findings of this study create an understanding of the action methods and benefits of different LCB chemical pretreatment techniques while highlighting the outstanding drawbacks that require divergent strategies.","PeriodicalId":504271,"journal":{"name":"Clean Energy Science and Technology","volume":"41 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139256480","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}

引用次数: 0