Pub Date : 2014-10-22DOI: 10.17516/1999-494x-2015-8-2-166-175
V. Neyman, L. Neyman
Impact synchronous electromagnetic machines forced cooling systems constructions have been classified and estimated. The first group of electromagnetic machines cooling systems include impact node external ventilation ones where heat is dissipated only from the magnetic core external cylinder surface. The second group involves cooling systems with internal airflow paths having independent air inlet and outlet through holes in poles. The third group includes cooling systems with coaxial channels in windings. If multilayer winding separate sections have the same thickness, their balancing cooling is provided by airflow rate in particular ventilation channels in proportion to dissipated power. Hence temperature difference between heated layers in the winding space can be two times and more reduced. The fourth group includes cooling systems with channels radial configuration to increase windings total cooling surface area, reduce airflow resistance and provide more balanced heating of both windings. External forced airflow cooling systems are specified with heat flow range related to winding cooling surface area and specific winding active volume thermal load. Forced air cooling is proved to permit additional electromagnetic impact load, increasing impact energy or frequency at permissible heating. Ventilation unit power to support electromagnetic impact machine duty cycle about 100% can be 25% of power consumed by the impact node.
{"title":"Impact synchronous electromagnetic machines forced cooling systems constructions estimation","authors":"V. Neyman, L. Neyman","doi":"10.17516/1999-494x-2015-8-2-166-175","DOIUrl":"https://doi.org/10.17516/1999-494x-2015-8-2-166-175","url":null,"abstract":"Impact synchronous electromagnetic machines forced cooling systems constructions have been classified and estimated. The first group of electromagnetic machines cooling systems include impact node external ventilation ones where heat is dissipated only from the magnetic core external cylinder surface. The second group involves cooling systems with internal airflow paths having independent air inlet and outlet through holes in poles. The third group includes cooling systems with coaxial channels in windings. If multilayer winding separate sections have the same thickness, their balancing cooling is provided by airflow rate in particular ventilation channels in proportion to dissipated power. Hence temperature difference between heated layers in the winding space can be two times and more reduced. The fourth group includes cooling systems with channels radial configuration to increase windings total cooling surface area, reduce airflow resistance and provide more balanced heating of both windings. External forced airflow cooling systems are specified with heat flow range related to winding cooling surface area and specific winding active volume thermal load. Forced air cooling is proved to permit additional electromagnetic impact load, increasing impact energy or frequency at permissible heating. Ventilation unit power to support electromagnetic impact machine duty cycle about 100% can be 25% of power consumed by the impact node.","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"30 1","pages":"166-175"},"PeriodicalIF":0.0,"publicationDate":"2014-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75191639","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 : 2014-10-22DOI: 10.17516/1999-494x-2015-8-2-208-216
M. Kaderov, A. Kosolapov
Особенности развития мраморных месторождений в суровых климатических условиях исследуются и целесообразность сезонных работ ямы доказана. Для обеспечения востребованные объемы производства блоков и полной занятости персонала предлагается в развитии аналогичных условиях мраморных областях сообщении комбинированным способом. . Продолжительность сезона работы яму доказано и разработаны технологические схемы открытия шахтного поля при проведении операций по недропользованию. Доказано, что сезонные работы из ямы в течение круглогодичного работы шахты повышает эффективность инвестиций в разработку месторождений в мраморе 1,9-2,3 раза.
{"title":"The combined development of marble fields in the conditions of Siberia","authors":"M. Kaderov, A. Kosolapov","doi":"10.17516/1999-494x-2015-8-2-208-216","DOIUrl":"https://doi.org/10.17516/1999-494x-2015-8-2-208-216","url":null,"abstract":"Особенности развития мраморных месторождений в суровых климатических условиях исследуются и целесообразность сезонных работ ямы доказана. Для обеспечения востребованные объемы производства блоков и полной занятости персонала предлагается в развитии аналогичных условиях мраморных областях сообщении комбинированным способом. . Продолжительность сезона работы яму доказано и разработаны технологические схемы открытия шахтного поля при проведении операций по недропользованию. Доказано, что сезонные работы из ямы в течение круглогодичного работы шахты повышает эффективность инвестиций в разработку месторождений в мраморе 1,9-2,3 раза.","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"16 6 1","pages":"208-216"},"PeriodicalIF":0.0,"publicationDate":"2014-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82930653","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 : 2014-10-21DOI: 10.17516/1999-494x-2015-8-1-117-125
T. Melnyk
{"title":"Empiric communication between an expenditure and other descriptions of stream of water","authors":"T. Melnyk","doi":"10.17516/1999-494x-2015-8-1-117-125","DOIUrl":"https://doi.org/10.17516/1999-494x-2015-8-1-117-125","url":null,"abstract":"","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"446 1","pages":"117-125"},"PeriodicalIF":0.0,"publicationDate":"2014-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82899977","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 : 2014-10-21DOI: 10.17516/1999-494x-2015-8-1-11-32
Yuri L. Lipovka, Vitaliy I. Belilovets, A. Y. Lipovka, Ю.Л. Липовка, В.И. Белиловец, А. Ю. Липовка
This article is about calculations of U - shaped regions of water heat network. The universal calculation algorithm is used for various geometric schemes and simple self-compensating pipeline sections. The influence of slenderness ratio and stress concentration factor in the smooth curved bends on voltages and maximum permissible flight compensated shoulders of U - shaped regions for different geometric configurations was taken into account in this work.
{"title":"The Influence of Slenderness Ratio and Stress Concentration in Taps on Load Calculations to Thermal Expansion in U-shaped Compensators of Thermal Network","authors":"Yuri L. Lipovka, Vitaliy I. Belilovets, A. Y. Lipovka, Ю.Л. Липовка, В.И. Белиловец, А. Ю. Липовка","doi":"10.17516/1999-494x-2015-8-1-11-32","DOIUrl":"https://doi.org/10.17516/1999-494x-2015-8-1-11-32","url":null,"abstract":"This article is about calculations of U - shaped regions of water heat network. The universal calculation algorithm is used for various geometric schemes and simple self-compensating pipeline sections. The influence of slenderness ratio and stress concentration factor in the smooth curved bends on voltages and maximum permissible flight compensated shoulders of U - shaped regions for different geometric configurations was taken into account in this work.","PeriodicalId":11548,"journal":{"name":"Engineering & Technologies","volume":"73 1","pages":"11-32"},"PeriodicalIF":0.0,"publicationDate":"2014-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76440739","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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