International Journal of Energy最新文献

{"title":"Design Analysis of CO2 Refrigeration System for Artificial Ice Rinks","authors":"Qiangxu Gao, Cai Wen, Guofeng Bai, Zhenying Zhang","doi":"10.54097/ije.v4i1.004","DOIUrl":"https://doi.org/10.54097/ije.v4i1.004","url":null,"abstract":"With the increasingly serious environmental problems, the use of natural refrigerants has become an inevitable trend. In this paper, an artificial ice rink with a CO2 refrigeration system is studied, and the ice rink site and refrigeration system process are analyzed. The structure of the ice rink site includes a surface layer, a base layer, and an antifreeze layer. The refrigeration system flow has indirect ice rink refrigeration systems and direct ice rink refrigeration systems. With the application of the CO2 transcritical refrigeration cycle, the efficiency of the ice rink has been greatly improved.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"231 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140428293","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}

{"title":"The Application Status and Prospects of Solar Photovoltaic Power Generation Technology in China","authors":"Kunqi Zhao, Li Liu, Cheng Xing","doi":"10.54097/ije.v4i1.005","DOIUrl":"https://doi.org/10.54097/ije.v4i1.005","url":null,"abstract":"Solar photovoltaic power generation, as an environmentally friendly energy technology that converts sunlight into electricity, directly converts sunlight into electricity through the use of solar panels, further producing clean and environmentally friendly electricity. Through the analysis of the development status of China's solar photovoltaic power generation, this article discusses the development direction of China's solar photovoltaic power generation to provide reference for the healthy development of China's solar photovoltaic power generation industry.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"41 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140431794","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}

{"title":"Detection of Underground Geological Structure by Radio-wave Laneway Penetration Technology","authors":"Wenxin Guo, Rui Guo, Tianlong Lan, Heping Niu, Jiang-Min Chen","doi":"10.54097/ije.v4i1.002","DOIUrl":"https://doi.org/10.54097/ije.v4i1.002","url":null,"abstract":"Hidden geological anomalies such as roof water and fault of working face will affect the mining progress and even induce coal and rock dynamic disaster. Therefore, it is necessary to use radio-wave laneway penetration meter for detection in the process of coal mining. The geological structure existing in the F6226 working face has been basically verified by this technology, which provides technical basis and support for geological work such as drilling. Through the study of the application effect of F6226 working face laneway penetration technology, and comparison with the real data revealed in the actual drilling and mining, the delineated abnormal areas in the laneway penetration results show that the abnormal areas of the 3D seismic data are verified and a collapse column is modified. The application of laneway penetration technology in mine geology improves the safety of coal mine production.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"156 S319","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140428717","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}

{"title":"Preparation and Characterization of Functionzliaed Silicone Oil for High Temperature Mold Release Agent","authors":"Ao Song, Hongke Yang, Haihong Cheng, Qianlong Liu, Ying Tang","doi":"10.54097/ije.v4i1.003","DOIUrl":"https://doi.org/10.54097/ije.v4i1.003","url":null,"abstract":"Silicohydrogen addition method was utilized to prepare long-chain alkyl silicone oils using high hydrogen-containing silicone oil, α-methylstyrene, and 1-tetradecene as raw materials and chloroplatinic acid as catalyst. FTIR and 1H-NMR were used to characterize the structure of the products, and the effects of reaction temperature, reaction time, catalyst dosage, and n(Si-H): n(C=C) on the Si-H conversion were investigated experimentally to determine the optimal reaction process. The experimental results showed that the optimized process conditions were n(Si-H): n(C=C) =1:1.1, reaction time of 6 h, reaction temperature of 150 °C, catalyst dosage of 2 ppm, and the Si-H conversion of the product was 96.3%.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"168 S359","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140428676","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}

{"title":"Study of Gas Film Cooling under Large Eddy Simulation: Effect of Forward and Backward Injection on Gas Turbine Cooling Efficiency and Stability","authors":"Junheng Chen, Dongdong Sha, Aichen Gao, Wenyang Zhang, Haojie Chen","doi":"10.54097/ije.v4i1.006","DOIUrl":"https://doi.org/10.54097/ije.v4i1.006","url":null,"abstract":"In the design of advanced gas turbines, improving thermal efficiency and power output is crucial achieve energy saving and emission reduction goals. This necessitates raising the inlet temperature, thereby highlighting the importance developing efficient cooling technologies to ensure the longevity of hot components. Gas film cooling, as a widely used traditional cooling method, is subject to the influence of fluid dynamic characteristics, especially in unstable operating environments such as pressure fluctuations in the upstream combustion chamber and interactions between stators and rotors. This study utilized large eddy simulation to analyze the effectiveness of trench film cooling under such unstable conditions, with a specific focus on the time-averaged and transient characteristics of forward and backward injection of cooling air. The study investigated the efficacy of film cooling under pulsating flow conditions, with a blowing ratio of 1.5 under steady-state conditions, utilizing cosine and square waves as pulse boundaries, and a Strouhal number of 0.254. The research findings reveal that: 1) Contrary to the results under steady-state conditions, pulsating reverse injection led to a reduction of over 15% in time-averaged cooling efficiency and a noticeable decrease in the film coverage area compared to forward injection; this phenomenon is determined by the different flow mechanisms under steady-state and pulsating states. 2) Under a certain blowing ratio, the instability of gas film cooling is induced by the temporal fluctuations of near-wall vortices, which could result in rapid temperature changes and component failures. For pulsating forward injection, additional high film cooling unsteadiness outside the slot membrane orifices was observed. In the case of backward injection, pulsations did not lead to a significant increase in instability. These research findings provide a deeper understanding of the impact of gas film cooling on the cooling efficiency and stability of gas turbines, enabling gas film cooling technology to meet the inlet temperature requirements of advanced gas turbines, thereby reducing carbon emissions and contributing to the achievement of China's dual carbon goals.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"183 S482","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140428432","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}

{"title":"The Influence of Temperament on the Conveying Efficiency of UCG High Temperature Gathering Network","authors":"Hongjie Zou, Zuwang Liu, Lei Zhang, Yu Chen, Yabin Wang","doi":"10.54097/ije.v4i1.001","DOIUrl":"https://doi.org/10.54097/ije.v4i1.001","url":null,"abstract":"Due to the particularity of its gas source area and transportation medium, the factors affecting the efficiency of UCG pipeline transportation are also more complex than those of conventional natural gas. The dendriform UCG pipeline network model is designed through pipe network simulation software, aiming at different component conditions such as moisture, coal tar and dust, and aiming at different pressure and pressure drop changes of wellsite, branch line and trunk line respectively for quantitative analysis. The results show that the increase of the proportion of CH4 and H2 can improve the transport efficiency. With the increase of the proportion of H2O components, the transport efficiency will decrease. Tar in the group does not increase the transportation efficiency, and if the component is large, it will lead to liquid phase in the pipeline and reduce the transportation efficiency; The appearance of dust will reduce the efficiency of transportation.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"49 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140431485","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}

{"title":"Experimental Study on Mechanical Characteristics of Prefabricated Fractured Sandstone Samples under Uniaxial Cyclic Compression","authors":"Dahua Ren, Chengfang Shan, Huiyang Shang, Yafeng Li, Wei Liu, Sijiang Wei","doi":"10.54097/ije.v3i3.003","DOIUrl":"https://doi.org/10.54097/ije.v3i3.003","url":null,"abstract":"The loading-unloading physical and mechanical characteristics of fractured coal-bearing strata are greatly affected by fracture occurrence. In order to study the physical and mechanical response characteristics of fractured rock under cyclic compression, this paper takes prefabricated fractured sandstone samples with different dip angles as the object, and uses uniaxial cyclic loading and unloading test to study the influence of crack dip angle on sample strength, failure mode and crack propagation law. The results show that with the increase of crack inclination angle, the cyclic loading and unloading peak strength and elastic modulus of the sample increase significantly, and the peak strain decreases first and then increases. During the cyclic loading process, the area of the hysteresis loop gradually decreases, the slope gradually increases, the energy con-sumed by the hysteresis loop gradually decreases, the cumulative plastic deformation increases, and the curve shape presents a “concave” type; when it is 15 ° and 30 °, the cracks at the crack tip are wing cracks. When it is 45 °, the cracks at the crack tip are secondary inclined cracks and wing cracks. When it is 60 °, 75 ° and 90 °, the cracks at the crack tip are secondary coplanar cracks and wing cracks. With the increase of fracture dip angle, the number of cycles and peak strength at failure are increasing.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"21 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139182423","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}

{"title":"Urban Development and Sustainable Land Resource Management: An Ecological Geological Perspective","authors":"Yuan Kuang, Nan ka E Wu","doi":"10.54097/ije.v3i3.001","DOIUrl":"https://doi.org/10.54097/ije.v3i3.001","url":null,"abstract":"This paper delves into the crucial role of ecogeology in urban development and land resource management. Ecogeology integrates principles of geology, ecology, and urban planning to achieve a balance between urban growth and the preservation of the natural environment. The article emphasizes the core principles, methods, and applications of ecogeology in urban planning to foster sustainable urban development. The section on challenges in urban development and sustainable land resource management highlights issues such as rapid global urbanization, land fragmentation, and ecosystem degradation. Urbanization trends place significant demands on land resources, but they also come with resource scarcity, environmental burdens, and social issues. Land fragmentation results in the fragmentation of natural landscapes, while ecosystem degradation threatens biodiversity and ecosystem services. These challenges require comprehensive approaches, and ecogeology provides a promising avenue. The paper further explores successful cases and best practices, including projects in Singapore, Kutzbachstadt (Germany), Shenzhen, and others. These cases demonstrate how ecogeology successfully enhances urban environmental quality and improves the quality of life for urban residents through measures such as wetland restoration, green infrastructure, nature conservation, and urban green spaces. The future outlook section emphasizes the importance of sustainable urban planning, climate change adaptation, and technological innovation. Cities will continue to expand, climate change will persist in affecting the environment, and technological innovation will drive modern urban management.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"76 1-2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139181917","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}

{"title":"Study on Evolution Characteristics of Stress Field of Stepped Fault","authors":"Guangsheng Chen","doi":"10.54097/ije.v3i3.002","DOIUrl":"https://doi.org/10.54097/ije.v3i3.002","url":null,"abstract":"With the development of mining to the deep, the ground stress increases correspondingly, and the geological conditions become more and more complicated. Mine dynamic disasters mainly occur near faults. Numerous studies have been conducted on single faults, but few studies have been done on stepped faults formed by double faults under complex geological conditions. Based on this, with the 3110-working face of Zhong Tai Mining in He bi as the engineering background, Single fault model a and different step fault models b, c, d, e and f were established by Flac3D numerical simulation software. The characteristics of stress field evolution of single fault and step fault under the influence of deep mining are studied. The results show that the stress distribution in the upper wall of the fault forms a stress concentration zone, and in the lower wall forms a stress weakening zone. Under the influence of excavation disturbance, the vertical fault distance and the horizontal distance between faults will affect the stress evolution characteristics of the stepped fault.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"94 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139182175","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}

{"title":"Application of Seismic Channel Wave Technology on Small Structure Exploration in Coal Mine","authors":"Shaoqin Fan, Yanzhao Chen, Li Wang, Xiaopan Liu, Jiang-Min Chen","doi":"10.54097/ije.v3i3.004","DOIUrl":"https://doi.org/10.54097/ije.v3i3.004","url":null,"abstract":"At lane 20207 and lane 50207 of the 80207 working face of Sitai Mine, many small faults are exposed, and their extension is unknown, which causes great interference to safe and efficient mining and even normal production of the working face. In order to guide the rational transformation and safe and efficient production of the working face with science, Sitai Coal Mine commissioned Henan Polytechnic University to find out the extension of the exposed fault on the face and other geological anomalies by using geophysical exploration methods. According to the purpose of geophysical exploration in Sitai coal mine, combined with the geological conditions of the working face, the SUMMIT II EX type seismic channel wave exploration produced by DMT company of Germany is selected to explore the 80207 working face with the combined detection method of transmission and reflection. According to the detection results, combined with the existing hydrogeological data of Sitai mine, the relative channel wave anomaly area is delineated. The results show that the seismic channel wave exploration can provide a basis for the prevention and control of mine water disaster conveniently and effectively.","PeriodicalId":510211,"journal":{"name":"International Journal of Energy","volume":"45 7-8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139182212","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}