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Information × Registration Number 0220U103325, 0119U103213 , R & D reports Title Development of effective composite heat exchange surfaces and technologies for their production popup.stage_title Head Pysmenny Evgen M., Доктор технічних наук Registration Date 17-09-2020 Organization National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" popup.description2  The purpose of the stage is to develop the technology of connecting the fins to the flat-oval tube by contact welding, determining the thermoaerodynamic characteristics of the composite heat exchange surface and establishing its optimal geometric parameters, determining the technical requirements for the prototype of the air cooler based on compositional heat exchange surface. The essence of development consists in application of the finned flat-oval tubes of new generation which fins are made of an aluminum alloy and a flat-oval tube from carbon steel, as heat-exchange surfaces in air cooling devices. Within the framework of the second stage of scientific and technical work, a prototype of semi-automatic equipment for connection of tube and fins was made and tested. Also, the optimal thermotechnical and aerodynamic characteristics of composite heat exchange surfaces with variation of their geometric characteristics and mode parameters are determined, geometrical parameters of heat exchange surfaces are determined on the basis of obtained thermotechnical and aerodynamic characteristics, thermal contact resistance between tube and fin and corrosion resistance of composite tubes are determined. The initial data for designing a prototype section of the air cooler on the basis of a composite heat exchange surface on the territory of the operating thermal power plant are offered. Composite heat exchange surface in comparison with surfaces from steel spiral finned tubes, from bimetallic tubes with rolled spiral finning, from finned oval tubes, has 30-40% higher specific surface area, 2-3 times less specific weight and 2 times less aerodynamic resistance. The composite surface provides perfect thermal contact between the fins and the tube due to their contact welding, which increases the intensity of external heat transfer of the surface by 20-25%. Product Description popup.authors Yemtsov Yevhenii V. Avdieieva Olena V. Bykov Ernest B. Voznyuk Maksim M. Hrushovyi Anatolii M. Konko Denys V. Pysmennyy Yevgen M Rogachov Valerii A. Rubin Serhii H. Rudenko Oleksandr I Skok Vitalii I. Terekh Oleksandr M. Cherniienko Valerii D. popup.nrat_date 2020-10-01 Close