Thermo- and Aerodynamic Characteristics of Staggered Finned Tube Bundles Having Intensified Heat Exchange in Air Coolers

• Published in: Chemical and petroleum engineering 2022-05, Vol.58 (1-2), p.133-142
• Main Authors: Kuntysh, V. B., Sukhotski, A. B., Piir, A. E., Mulin, V. P.
• Format: Article
• Language: English
• Subjects: Aerodynamic characteristics; Aerodynamics; Air flow; Aluminum; Analysis; Bimetals; Chemistry; Chemistry and Materials Science; Coolers; Cooling; Geotechnical Engineering & Applied Earth Sciences; Heat exchange; Heat transfer; Industrial Chemistry/Chemical Engineering; Industrial Pollution Prevention; Mass production; Mineral Resources; Optimization; Parameters; Pipes; Power consumption; Power management; Thermodynamic efficiency; Weight reduction
• ISSN: 0009-2355; 1573-8329
• DOI: 10.1007/s10556-022-01066-4

Extensive and intensive methods of improving the energy and volume-mass characteristics of the heat exchange section of the air-cooling apparatus are analyzed. It is shown that the possibilities of using the extensive method have been for the most part exhausted. An effective method for intensifying convective heat exchange is carried out along the air side of a bimetallic ribbed pipe. Technical solutions are provided for the mass production of intensified bimetallic ribbed pipes, in which circular aluminum ribs are modified to form air flow turbulators. The thermal efficiency coefficient increases up to 25% with the same power consumption for a fan drive. In unchanged overall dimensions, the thermal power of the air-cooling device is provided by a smaller number of bimetallic finned pipes to reduce the weight of the device by 20–25%, respectively. Recommendations for optimizing the parameters of turbulizers are formulated. Similarity equations in the interval Re = (3–25)·10 3 for heat transfer and aerodynamic resistance of staggered bundles of bimetallic ribbed pipes of optimal parameters are given.