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Information × Registration Number 0221U101806, 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 25-01-2021 Organization National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" popup.description2  The essence of the development is the use in the heat exchange surface of finned flat-oval tubes of the new generation, the ribs of which are made of aluminum alloy, and flat-oval tube is made from carbon steel with anti-corrosion coating. Within the framework of the performed scientific and technical work, the optimal geometric parameters of composite heat exchange surfaces were determined, the optimal materials of finning and coating of the main tube were selected. Working design documentation has been developed for the production of a prototype of a semi-automatic equipment to obtain a connection between the tube and the ribs. An operational description of the optimal technology of tube and rib connection is made. A prototype of a semi-automatic equipment for obtaining a tube-rib connection was designed, manufactured and tested. Two variants of the units for the formation of finning are made. The geometrical parameters of heat exchange surfaces on the basis of the received thermotechnical and aerodynamic characteristics are defined, thermal contact resistance between a tube and a rib and corrosion resistance of composite finned pipes are defined. The working design documentation of a prototype section of the air cooling device on the basis of a composite surface of heat exchange is developed. A prototype of the section of the air cooling apparatus on the basis of the composite surface of heat exchange is made. Thermal tests of the prototype of the air cooling apparatus on the basis of the heat exchange composite surface as a part of the "dry" cooling tower at the operating thermal power plant are performed. Methods of thermal and aerodynamic calculations of composite heat exchange surfaces are offered. The composite heat transfer surface has 30-40% higher specific surface area and 1.5-2 times lower aerodynamic drag compared to the surfaces of steel spiral ribbed pipes, bimetallic pipes with rolled spiral finning, finned oval pipes. Product Description popup.authors Yemtsov Yevhenii V. Avdieieva Olena V Bykov Ernest B Voznyuk Maksim M. Hrushovyi Anatolii M. Konko Denys V Lyp`iavka Mykola M. Pysmenny Yevgen M Rohachov Valerii A Rubin Serhii H. Rudenko Oleksandr I Semenyako Oleksand V. Skok Vitalii I. Terekh Oleksandr M. Cherniienko Valerii D. Yavorska Maryna A. popup.nrat_date 2021-01-25 Close