NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech最新文献

{"title":"Thermodynamic analysis of the heat losses combined recovery ideal cycle of the compressor several process units","authors":"V. Yusha, G. Chernov","doi":"10.1063/1.5122095","DOIUrl":"https://doi.org/10.1063/1.5122095","url":null,"abstract":"The maximum efficiency cycle of the heat losses recovery system with multiple heat sources at the different temperature levels is presented in the paper. The efficiency equation was obtained on the basis of the cycle thermodynamic analysis. The analysis results were applied to the heat losses recovery system of the compressor unit comprising two sources of the compressed gas and compressor motor-drive exhaust gases heat losses. Consequently, the system cycle efficiency equation was obtained, as well as the fuel saving coefficient characterizing the recovery system performance was considered. The efficiency and fuel saving coefficient parametric analysis was carried out.The maximum efficiency cycle of the heat losses recovery system with multiple heat sources at the different temperature levels is presented in the paper. The efficiency equation was obtained on the basis of the cycle thermodynamic analysis. The analysis results were applied to the heat losses recovery system of the compressor unit comprising two sources of the compressed gas and compressor motor-drive exhaust gases heat losses. Consequently, the system cycle efficiency equation was obtained, as well as the fuel saving coefficient characterizing the recovery system performance was considered. The efficiency and fuel saving coefficient parametric analysis was carried out.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121378505","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":"Analysis of tie-in calculations for the pipeline on the basis of specialized software","authors":"A. Zanin, I. N. Kvasov","doi":"10.1063/1.5122157","DOIUrl":"https://doi.org/10.1063/1.5122157","url":null,"abstract":"This paper solves the problem of strength loads during the inserting a branch into the main line. The calculations carried out in a manual form and with the help of the Russian software START, which specializes in pipeline calculations. 3D-model of pipelines was designed to solve the problem and 3D-model visualized the using of the software Intergraph Smart Plant 3D. The results obtained in the development of the model, that made it possible to establish the most optimal characteristics of the pipeline tie-in for a strength loads and to identify the need to use reinforcement of this tie-in. In the course of the research, significant aspects of strength calculations studied, as well as features of the use of specialized software. The calculation used in the actual design of the CDU/VDU complex of the Omsk refinery.This paper solves the problem of strength loads during the inserting a branch into the main line. The calculations carried out in a manual form and with the help of the Russian software START, which specializes in pipeline calculations. 3D-model of pipelines was designed to solve the problem and 3D-model visualized the using of the software Intergraph Smart Plant 3D. The results obtained in the development of the model, that made it possible to establish the most optimal characteristics of the pipeline tie-in for a strength loads and to identify the need to use reinforcement of this tie-in. In the course of the research, significant aspects of strength calculations studied, as well as features of the use of specialized software. The calculation used in the actual design of the CDU/VDU complex of the Omsk refinery.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129214329","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":"Evaluation of the effect of leak-tightness of cylinder-piston seals on the working process of low-speed long stroke piston units","authors":"S. Busarov, D. Titov, I. Dyomin, A. V. Nedovenchanyi","doi":"10.1063/1.5122058","DOIUrl":"https://doi.org/10.1063/1.5122058","url":null,"abstract":"The theoretical analysis carried out in this work showed the relevance of the topic of determining the dependencies of conditional gaps in long-stroke units on the discharge pressure for various designs of the compression stage. Significant errors in the performance of calculations, especially for large diameters of the steps, make it unacceptable to use the values of gaps obtained for the existing structures of piston units. In the future, it is necessary to carry out field tests to determine the dependencies of the gaps on the pressure and the design of the unit.The theoretical analysis carried out in this work showed the relevance of the topic of determining the dependencies of conditional gaps in long-stroke units on the discharge pressure for various designs of the compression stage. Significant errors in the performance of calculations, especially for large diameters of the steps, make it unacceptable to use the values of gaps obtained for the existing structures of piston units. In the future, it is necessary to carry out field tests to determine the dependencies of the gaps on the pressure and the design of the unit.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128253187","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":"Express analysis of technological processes of compression and drying of wet air at the stages of design and operation of compressor stations","authors":"V. Kozlov, V. Shadrin, A. Podchufarov","doi":"10.1063/1.5122079","DOIUrl":"https://doi.org/10.1063/1.5122079","url":null,"abstract":"The quality of industrial compressed air is determined by the standard GOST R ISO 8573-1-2016, which provides several levels (classes) of residual moisture content of air produced by the compressor station. Depending on the level of residual moisture content, the main flow schemes of the equipment performing the drying of compressible air are presented. It is shown that the current adsorption drying processes substantially expanded mainly due to the use of various adsorbents regeneration circuits as compared with conventional basic technologies of cold and hot regeneration, known as PSA technology - pressure swing adsorption and TSA - temperature swing adsorption respectively [2,3]. Based on the experience of known works in this field [1,5,6,7], it is proposed to use the method of express analysis in the design of equipment as a compressed-air dryers and compressor systems in general using I-d diagram of humid air for operating pressures. Examples of the analysis of the process of compressing and dehumidifying the air according to the presented technological schemes are given. The processes of adsorption and regeneration in the latest generation of dryers, proposed by the leaders of the compressor market, are considered. The described method of express analysis of technological processes is of interest both at the design stage and in the industrial operation of modern compressor stations.The quality of industrial compressed air is determined by the standard GOST R ISO 8573-1-2016, which provides several levels (classes) of residual moisture content of air produced by the compressor station. Depending on the level of residual moisture content, the main flow schemes of the equipment performing the drying of compressible air are presented. It is shown that the current adsorption drying processes substantially expanded mainly due to the use of various adsorbents regeneration circuits as compared with conventional basic technologies of cold and hot regeneration, known as PSA technology - pressure swing adsorption and TSA - temperature swing adsorption respectively [2,3]. Based on the experience of known works in this field [1,5,6,7], it is proposed to use the method of express analysis in the design of equipment as a compressed-air dryers and compressor systems in general using I-d diagram of humid air for operating pressures. Examples of the analysis of the process of compressing and dehumidi...","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"116 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130938739","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":"Increasing the efficiency of the gas filter with a short diffuser by profiling its flow part","authors":"N. Y. Fil’kin, V. Yusha","doi":"10.1063/1.5122112","DOIUrl":"https://doi.org/10.1063/1.5122112","url":null,"abstract":"The paper considers an adsorption gas filter with a short diffuser for air purification from hydrocarbon vapors. Experimental researches of various options for reducing the flow unevenness in front of the filter element in the flow part of the gas filter were carried out, and their significant shortcomings were revealed. The profiling of the adsorption layer in the flow part of the gas filter on the basis of the flow velocity field profile is proposed. An increase the efficiency of the gas filter with a profiled adsorption cassette from the point of view of the criteria of gasdynamic efficiency was revealed, and a decrease in the volume of adsorbent filling by 17.6% was achieved while maintaining the same performance.The paper considers an adsorption gas filter with a short diffuser for air purification from hydrocarbon vapors. Experimental researches of various options for reducing the flow unevenness in front of the filter element in the flow part of the gas filter were carried out, and their significant shortcomings were revealed. The profiling of the adsorption layer in the flow part of the gas filter on the basis of the flow velocity field profile is proposed. An increase the efficiency of the gas filter with a profiled adsorption cassette from the point of view of the criteria of gasdynamic efficiency was revealed, and a decrease in the volume of adsorbent filling by 17.6% was achieved while maintaining the same performance.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134276304","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":"Selection of parameters of screw compressor profiles with the purpose of reducing reactions of the supports","authors":"A. N. Noskov, M. Shaposhnikova","doi":"10.1063/1.5122084","DOIUrl":"https://doi.org/10.1063/1.5122084","url":null,"abstract":"The use of rolling bearings in screw compressors instead of sliding bearings allows to simplify the design of the screw compressor, assign smaller profile clearances between the screws and reduce ballast leakages. This allows to increase the efficiency of the compressor. The use of rolling bearings is limited by its operational life, which depends on the values of reactions on the supports. The results of the calculation of the geometric characteristics of the screw compressor profiles, ensuring minimal reactions on the supports, were obtained.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114188660","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":"Condition monitoring of heat-exchange equipment of the diesel fuel hydrotreatment processes","authors":"A. Demin, A. Gorchakova, A. Naumenko, A. Odinets","doi":"10.1063/1.5122145","DOIUrl":"https://doi.org/10.1063/1.5122145","url":null,"abstract":"Hydrotreating technology is practically used for all products obtained in the process of primary petroleum processing, as well as for isomerization, reforming and catalytic cracking processes in order to obtain quality characteristics in terms of sulfur content in processing products. The paper presents ways to solve the current problem, which is to ensure the condition monitoring of heat exchange equipment in process plants that carry out diesel fuel hydrotreatment. The work is aimed at developing a technology and system to monitor the state of heat exchange equipment of the reactor block of the diesel hydrotreatment process using operating parameters based on the technological process simulation in the Aspen HYSYS environment. A study of the diesel fuels hydrotreatment process showed that, due to the temperature rise of the furnace pass, it is necessary to lower the raw material productivity. This is necessary to comply with the requirements of the technical process regulations. However, this leads to a decrease of 5% in production and losses of the enterprise to 20 million rubles per month. Input and output data on the flow rate, temperature and pressure of products, material and thermal balance of the reactor unit form the basis of the heat exchange equipment operation model and heat exchangers monitoring system. By comparing the parameters values of the heat exchange process model with the “ideal” heat exchangers without losses, with a model that is based on real data, it is possible to estimate the sources of losses and their quantitative characteristics. The proposed technology and monitoring system of heat exchange equipment makes it possible not only to determine the boundaries of the effective operation of heat exchangers, but also to save energy resources, and thus increase the profit of the enterprise, as well as provide comprehensive monitoring of the technological installation equipment, including not only machinery, but also heat exchange, column, capacity, reactor equipment.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127965168","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":"Investigation of the capsulated material properties for possibility of using it as recoverable raw materials","authors":"L. O. Shtripling, S. V. Bel’kova, E. G. Kholkin, E. Kholkina, A. E. Gagloeva","doi":"10.1063/1.5122025","DOIUrl":"https://doi.org/10.1063/1.5122025","url":null,"abstract":"Among the methods used to neutralize oil-polluted soils, the physic-chemical method (reagent encapsulation technology) based on the encapsulation of a pollutant is the simplest and relatively inexpensive. Applying reagent encapsulation technology neutralizes oil-polluted soil with toxic properties by obtaining fine, solid formations with a high degree of the pollutant isolation. Considering the volumes of annual pollution of soil with oil products, it is necessary not only to neutralize oil-polluted soil promptly, but also to dispose obtained neutralization products (encapsulated material) properly by using it as recycled raw materials. That is why it is very important to investigate the properties of the encapsulated material obtained. Considering the possible areas of the encapsulated material application, the main requirement should be to preserve the tightness of the microcapsule shells, when microcapsules enter the aqueous or acidic medium as the pollutant is located inside the shells. The purpose of the article is an experimental study of the properties of the encapsulated material on the effects of moisture (destruction of microcapsules while in the aquatic environment), the effect of temperature fluctuations, and resistance to acidic and mechanical effects (strength). The method of conducting experimental studies of the encapsulated material properties, the effects of natural and man-made factors has been considered. Experiments have shown that the microcapsules under study hold the pollutant inside reliably and that they are not subject to destruction during temperature fluctuations, being in aqueous or acidic medium, and also, they withstand high mechanical stress.Among the methods used to neutralize oil-polluted soils, the physic-chemical method (reagent encapsulation technology) based on the encapsulation of a pollutant is the simplest and relatively inexpensive. Applying reagent encapsulation technology neutralizes oil-polluted soil with toxic properties by obtaining fine, solid formations with a high degree of the pollutant isolation. Considering the volumes of annual pollution of soil with oil products, it is necessary not only to neutralize oil-polluted soil promptly, but also to dispose obtained neutralization products (encapsulated material) properly by using it as recycled raw materials. That is why it is very important to investigate the properties of the encapsulated material obtained. Considering the possible areas of the encapsulated material application, the main requirement should be to preserve the tightness of the microcapsule shells, when microcapsules enter the aqueous or acidic medium as the pollutant is located inside the shells. The purpose of...","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123612610","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":"Testing of temperature pile to obtain actual cooling performance","authors":"V. S. Evdokimov, V. Yusha, A. A. Kapelukhovskaya, A. Kuzmenkov, A. Isaev, N. S. Rozhkov","doi":"10.1063/1.5122097","DOIUrl":"https://doi.org/10.1063/1.5122097","url":null,"abstract":"In this paper, we analyzed the methods of evaluating the effectiveness and calculating the cooling capacity of the temperature piles, developed an algorithm, and performed an analytical calculation of the efficiency and cooling capacity of the heat stabilizer, heat stabilizer in the sleeve, and temperature piles. Bench tests of soil heat stabilizer (SHS) and temperature pile were carried out, the experimental data were processed, the efficiency and cooling capacity of the heat stabilizer, heat stabilizer in the sleeve, and temperature pile were evaluated. According to the results of calculations and tests of the temperature pile, conclusions and recommendations for evaluating the effectiveness and refrigerating capacity of the temperature pile are formulated. A method for the numerical calculation of the cooling capacity of SHS in various modes was developed and implemented in the ANSYS software package. Analytical methods of calculating the efficiency and cooling capacity of the SHS and temperature pile are made, analytical calculations are performed for all test modes.In this paper, we analyzed the methods of evaluating the effectiveness and calculating the cooling capacity of the temperature piles, developed an algorithm, and performed an analytical calculation of the efficiency and cooling capacity of the heat stabilizer, heat stabilizer in the sleeve, and temperature piles. Bench tests of soil heat stabilizer (SHS) and temperature pile were carried out, the experimental data were processed, the efficiency and cooling capacity of the heat stabilizer, heat stabilizer in the sleeve, and temperature pile were evaluated. According to the results of calculations and tests of the temperature pile, conclusions and recommendations for evaluating the effectiveness and refrigerating capacity of the temperature pile are formulated. A method for the numerical calculation of the cooling capacity of SHS in various modes was developed and implemented in the ANSYS software package. Analytical methods of calculating the efficiency and cooling capacity of the SHS and temperature pile ...","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"13 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113967832","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":"Research method of high-temperature low-flow turbine units self-lubricating bearing friction units temperature deformations","authors":"N. A. Raykovskiy, V. Yusha, A. Tretyakov, V. Zakharov, K. I. Kuznetsov","doi":"10.1063/1.5122094","DOIUrl":"https://doi.org/10.1063/1.5122094","url":null,"abstract":"","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116947083","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}